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00020
00021 #if defined(_WIN32)
00022 #define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
00023 #else
00024 #define _XOPEN_SOURCE 600 // For flockfile() on Linux
00025 #define _LARGEFILE_SOURCE // Enable 64-bit file offsets
00026 #endif
00027
00028 #ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
00029 #include <sys/types.h>
00030 #include <sys/stat.h>
00031 #include <errno.h>
00032 #include <signal.h>
00033 #include <fcntl.h>
00034 #endif // !_WIN32_WCE
00035
00036 #include <time.h>
00037 #include <stdlib.h>
00038 #include <stdarg.h>
00039 #include <assert.h>
00040 #include <string.h>
00041 #include <ctype.h>
00042 #include <limits.h>
00043 #include <stddef.h>
00044 #include <stdio.h>
00045
00046 #if defined(_WIN32) // Windows specific #includes and #defines
00047 #define _WIN32_WINNT 0x0400 // To make it link in VS2005
00048 #include <windows.h>
00049
00050 #ifndef PATH_MAX
00051 #define PATH_MAX MAX_PATH
00052 #endif
00053
00054 #ifndef _WIN32_WCE
00055 #include <process.h>
00056 #include <direct.h>
00057 #include <io.h>
00058 #else // _WIN32_WCE
00059 #include <winsock2.h>
00060 #define NO_CGI // WinCE has no pipes
00061
00062 typedef long off_t;
00063 #define BUFSIZ 4096
00064
00065 #define errno GetLastError()
00066 #define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
00067 #endif // _WIN32_WCE
00068
00069 #define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
00070 ((uint64_t)((uint32_t)(hi))) << 32))
00071 #define RATE_DIFF 10000000 // 100 nsecs
00072 #define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
00073 #define SYS2UNIX_TIME(lo, hi) \
00074 (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
00075
00076
00077
00078
00079 #if defined(_MSC_VER) && _MSC_VER < 1300
00080 #define STRX(x) #x
00081 #define STR(x) STRX(x)
00082 #define __func__ "line " STR(__LINE__)
00083 #define strtoull(x, y, z) strtoul(x, y, z)
00084 #define strtoll(x, y, z) strtol(x, y, z)
00085 #else
00086 #define __func__ __FUNCTION__
00087 #define strtoull(x, y, z) _strtoui64(x, y, z)
00088 #define strtoll(x, y, z) _strtoi64(x, y, z)
00089 #endif // _MSC_VER
00090
00091 #define ERRNO GetLastError()
00092 #define NO_SOCKLEN_T
00093 #define SSL_LIB "ssleay32.dll"
00094 #define CRYPTO_LIB "libeay32.dll"
00095 #define DIRSEP '\\'
00096 #define IS_DIRSEP_CHAR(c) ((c) == '/' || (c) == '\\')
00097 #define O_NONBLOCK 0
00098 #if !defined(EWOULDBLOCK)
00099 #define EWOULDBLOCK WSAEWOULDBLOCK
00100 #endif // !EWOULDBLOCK
00101 #define _POSIX_
00102 #define INT64_FMT "I64d"
00103
00104 #define WINCDECL __cdecl
00105 #define SHUT_WR 1
00106 #define snprintf _snprintf
00107 #define vsnprintf _vsnprintf
00108 #define sleep(x) Sleep((x) * 1000)
00109
00110 #define pipe(x) _pipe(x, BUFSIZ, _O_BINARY)
00111 #define popen(x, y) _popen(x, y)
00112 #define pclose(x) _pclose(x)
00113 #define close(x) _close(x)
00114 #define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
00115 #define RTLD_LAZY 0
00116 #define fseeko(x, y, z) fseek((x), (y), (z))
00117 #define fdopen(x, y) _fdopen((x), (y))
00118 #define write(x, y, z) _write((x), (y), (unsigned) z)
00119 #define read(x, y, z) _read((x), (y), (unsigned) z)
00120 #define flockfile(x) (void) 0
00121 #define funlockfile(x) (void) 0
00122
00123 #if !defined(fileno)
00124 #define fileno(x) _fileno(x)
00125 #endif // !fileno MINGW #defines fileno
00126
00127 typedef HANDLE pthread_mutex_t;
00128 typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
00129 typedef DWORD pthread_t;
00130 #define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
00131
00132 struct timespec {
00133 long tv_nsec;
00134 long tv_sec;
00135 };
00136
00137 static int pthread_mutex_lock(pthread_mutex_t *);
00138 static int pthread_mutex_unlock(pthread_mutex_t *);
00139 static FILE *mg_fopen(const char *path, const char *mode);
00140
00141 #if defined(HAVE_STDINT)
00142 #include <stdint.h>
00143 #else
00144 typedef unsigned int uint32_t;
00145 typedef unsigned short uint16_t;
00146 typedef unsigned __int64 uint64_t;
00147 typedef __int64 int64_t;
00148 #define INT64_MAX 9223372036854775807
00149 #endif // HAVE_STDINT
00150
00151
00152 struct dirent {
00153 char d_name[PATH_MAX];
00154 };
00155
00156 typedef struct DIR {
00157 HANDLE handle;
00158 WIN32_FIND_DATAW info;
00159 struct dirent result;
00160 } DIR;
00161
00162 #else // UNIX specific
00163 #include <sys/wait.h>
00164 #include <sys/socket.h>
00165 #include <sys/select.h>
00166 #include <netinet/in.h>
00167 #include <arpa/inet.h>
00168 #include <sys/time.h>
00169 #include <stdint.h>
00170 #include <inttypes.h>
00171 #include <netdb.h>
00172
00173 #include <pwd.h>
00174 #include <unistd.h>
00175 #include <dirent.h>
00176 #if !defined(NO_SSL_DL) && !defined(NO_SSL)
00177 #include <dlfcn.h>
00178 #endif
00179 #include <pthread.h>
00180 #if defined(__MACH__)
00181 #define SSL_LIB "libssl.dylib"
00182 #define CRYPTO_LIB "libcrypto.dylib"
00183 #else
00184 #if !defined(SSL_LIB)
00185 #define SSL_LIB "libssl.so"
00186 #endif
00187 #if !defined(CRYPTO_LIB)
00188 #define CRYPTO_LIB "libcrypto.so"
00189 #endif
00190 #endif
00191 #define DIRSEP '/'
00192 #define IS_DIRSEP_CHAR(c) ((c) == '/')
00193 #define O_BINARY 0
00194 #define closesocket(a) close(a)
00195 #define mg_fopen(x, y) fopen(x, y)
00196 #define mg_mkdir(x, y) mkdir(x, y)
00197 #define mg_remove(x) remove(x)
00198 #define mg_rename(x, y) rename(x, y)
00199 #define ERRNO errno
00200 #define INVALID_SOCKET (-1)
00201 #define INT64_FMT PRId64
00202 typedef int SOCKET;
00203 #define WINCDECL
00204
00205 #endif // End of Windows and UNIX specific includes
00206
00207 #include "mongoose.h"
00208
00209 #define MONGOOSE_VERSION "3.0"
00210 #define PASSWORDS_FILE_NAME ".htpasswd"
00211 #define CGI_ENVIRONMENT_SIZE 4096
00212 #define MAX_CGI_ENVIR_VARS 64
00213 #define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
00214
00215 #if defined(DEBUG)
00216 #define DEBUG_TRACE(x) do { \
00217 flockfile(stdout); \
00218 printf("*** %lu.%p.%s.%d: ", \
00219 (unsigned long) time(NULL), (void *) pthread_self(), \
00220 __func__, __LINE__); \
00221 printf x; \
00222 putchar('\n'); \
00223 fflush(stdout); \
00224 funlockfile(stdout); \
00225 } while (0)
00226 #else
00227 #define DEBUG_TRACE(x)
00228 #endif // DEBUG
00229
00230
00231 #ifdef NO_SOCKLEN_T
00232 typedef int socklen_t;
00233 #endif // NO_SOCKLEN_T
00234
00235 typedef void * (*mg_thread_func_t)(void *);
00236
00237 static const char *http_500_error = "Internal Server Error";
00238
00239
00240
00241
00242 typedef struct ssl_st SSL;
00243 typedef struct ssl_method_st SSL_METHOD;
00244 typedef struct ssl_ctx_st SSL_CTX;
00245
00246 #define SSL_ERROR_WANT_READ 2
00247 #define SSL_ERROR_WANT_WRITE 3
00248 #define SSL_FILETYPE_PEM 1
00249 #define CRYPTO_LOCK 1
00250
00251 #if defined(NO_SSL_DL)
00252 extern void SSL_free(SSL *);
00253 extern int SSL_accept(SSL *);
00254 extern int SSL_connect(SSL *);
00255 extern int SSL_read(SSL *, void *, int);
00256 extern int SSL_write(SSL *, const void *, int);
00257 extern int SSL_get_error(const SSL *, int);
00258 extern int SSL_set_fd(SSL *, int);
00259 extern SSL *SSL_new(SSL_CTX *);
00260 extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
00261 extern SSL_METHOD *SSLv23_server_method(void);
00262 extern int SSL_library_init(void);
00263 extern void SSL_load_error_strings(void);
00264 extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
00265 extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
00266 extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
00267 extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
00268 extern void SSL_CTX_free(SSL_CTX *);
00269 extern unsigned long ERR_get_error(void);
00270 extern char *ERR_error_string(unsigned long, char *);
00271 extern int CRYPTO_num_locks(void);
00272 extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
00273 extern void CRYPTO_set_id_callback(unsigned long (*)(void));
00274 #else
00275
00276 struct ssl_func {
00277 const char *name;
00278 void (*ptr)(void);
00279 };
00280
00281 #define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
00282 #define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
00283 #define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
00284 #define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
00285 #define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
00286 #define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5])
00287 #define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
00288 #define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
00289 #define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
00290 #define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
00291 #define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
00292 #define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
00293 const char *, int)) ssl_sw[11].ptr)
00294 #define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
00295 const char *, int)) ssl_sw[12].ptr)
00296 #define SSL_CTX_set_default_passwd_cb \
00297 (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
00298 #define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
00299 #define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
00300 #define SSL_CTX_use_certificate_chain_file \
00301 (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
00302
00303 #define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
00304 #define CRYPTO_set_locking_callback \
00305 (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
00306 #define CRYPTO_set_id_callback \
00307 (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
00308 #define ERR_get_error (* (unsigned long (*)(void)) ssl_sw[3].ptr)
00309 #define ERR_error_string (* (char * (*)(unsigned long, char *)) ssl_sw[4].ptr)
00310
00311
00312
00313
00314
00315 static struct ssl_func ssl_sw[] = {
00316 {"SSL_free", NULL},
00317 {"SSL_accept", NULL},
00318 {"SSL_connect", NULL},
00319 {"SSL_read", NULL},
00320 {"SSL_write", NULL},
00321 {"SSL_get_error", NULL},
00322 {"SSL_set_fd", NULL},
00323 {"SSL_new", NULL},
00324 {"SSL_CTX_new", NULL},
00325 {"SSLv23_server_method", NULL},
00326 {"SSL_library_init", NULL},
00327 {"SSL_CTX_use_PrivateKey_file", NULL},
00328 {"SSL_CTX_use_certificate_file",NULL},
00329 {"SSL_CTX_set_default_passwd_cb",NULL},
00330 {"SSL_CTX_free", NULL},
00331 {"SSL_load_error_strings", NULL},
00332 {"SSL_CTX_use_certificate_chain_file", NULL},
00333 {NULL, NULL}
00334 };
00335
00336
00337 static struct ssl_func crypto_sw[] = {
00338 {"CRYPTO_num_locks", NULL},
00339 {"CRYPTO_set_locking_callback", NULL},
00340 {"CRYPTO_set_id_callback", NULL},
00341 {"ERR_get_error", NULL},
00342 {"ERR_error_string", NULL},
00343 {NULL, NULL}
00344 };
00345 #endif // NO_SSL_DL
00346
00347 static const char *month_names[] = {
00348 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
00349 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
00350 };
00351
00352
00353
00354 struct usa {
00355 socklen_t len;
00356 union {
00357 struct sockaddr sa;
00358 struct sockaddr_in sin;
00359 } u;
00360 };
00361
00362
00363 struct vec {
00364 const char *ptr;
00365 size_t len;
00366 };
00367
00368
00369 struct mgstat {
00370 int is_directory;
00371 int64_t size;
00372 time_t mtime;
00373 };
00374
00375
00376
00377 struct socket {
00378 struct socket *next;
00379 SOCKET sock;
00380 struct usa lsa;
00381 struct usa rsa;
00382 int is_ssl;
00383 int is_proxy;
00384 };
00385
00386 enum {
00387 CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
00388 PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, ACCESS_LOG_FILE,
00389 SSL_CHAIN_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
00390 GLOBAL_PASSWORDS_FILE, INDEX_FILES,
00391 ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST, MAX_REQUEST_SIZE,
00392 EXTRA_MIME_TYPES, LISTENING_PORTS,
00393 DOCUMENT_ROOT, SSL_CERTIFICATE, NUM_THREADS, RUN_AS_USER,
00394 MAX_THREADS, NUM_OPTIONS
00395 };
00396
00397 static const char *config_options[] = {
00398 "C", "cgi_extensions", ".cgi,.pl,.php",
00399 "E", "cgi_environment", NULL,
00400 "G", "put_delete_passwords_file", NULL,
00401 "I", "cgi_interpreter", NULL,
00402 "P", "protect_uri", NULL,
00403 "R", "authentication_domain", "mydomain.com",
00404 "S", "ssi_extensions", ".shtml,.shtm",
00405 "a", "access_log_file", NULL,
00406 "c", "ssl_chain_file", NULL,
00407 "d", "enable_directory_listing", "yes",
00408 "e", "error_log_file", NULL,
00409 "g", "global_passwords_file", NULL,
00410 "i", "index_files", "index.html,index.htm,index.cgi",
00411 "k", "enable_keep_alive", "no",
00412 "l", "access_control_list", NULL,
00413 "M", "max_request_size", "16384",
00414 "m", "extra_mime_types", NULL,
00415 "p", "listening_ports", "8080",
00416 "r", "document_root", ".",
00417 "s", "ssl_certificate", NULL,
00418 "t", "num_threads", "10",
00419 "u", "run_as_user", NULL,
00420 "T", "max_threads", NULL,
00421 NULL
00422 };
00423 #define ENTRIES_PER_CONFIG_OPTION 3
00424
00425 struct mg_context {
00426 int stop_flag;
00427 SSL_CTX *ssl_ctx;
00428 char *config[NUM_OPTIONS];
00429 mg_callback_t user_callback;
00430 void *user_data;
00431
00432 struct socket *listening_sockets;
00433
00434 int num_threads;
00435 int idle_threads;
00436 int base_threads;
00437 int max_threads;
00438 pthread_mutex_t mutex;
00439 pthread_cond_t cond;
00440
00441 struct socket queue[20];
00442 int sq_head;
00443 int sq_tail;
00444 pthread_cond_t sq_full;
00445 pthread_cond_t sq_empty;
00446 };
00447
00448 struct mg_connection {
00449 struct mg_connection *peer;
00450 struct mg_request_info request_info;
00451 struct mg_context *ctx;
00452 SSL *ssl;
00453 struct socket client;
00454 time_t birth_time;
00455 int64_t num_bytes_sent;
00456 int64_t content_len;
00457 int64_t consumed_content;
00458 char *buf;
00459 int buf_size;
00460 int request_len;
00461 int data_len;
00462 };
00463
00464 const char **mg_get_valid_option_names(void) {
00465 return config_options;
00466 }
00467
00468 static void *call_user(struct mg_connection *conn, enum mg_event event) {
00469 conn->request_info.user_data = conn->ctx->user_data;
00470 return conn->ctx->user_callback == NULL ? NULL :
00471 conn->ctx->user_callback(event, conn, &conn->request_info);
00472 }
00473
00474 static int get_option_index(const char *name) {
00475 int i;
00476
00477 for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
00478 if (strcmp(config_options[i], name) == 0 ||
00479 strcmp(config_options[i + 1], name) == 0) {
00480 return i / ENTRIES_PER_CONFIG_OPTION;
00481 }
00482 }
00483 return -1;
00484 }
00485
00486 const char *mg_get_option(const struct mg_context *ctx, const char *name) {
00487 int i;
00488 if ((i = get_option_index(name)) == -1) {
00489 return NULL;
00490 } else if (ctx->config[i] == NULL) {
00491 return "";
00492 } else {
00493 return ctx->config[i];
00494 }
00495 }
00496
00497
00498 static void cry(struct mg_connection *conn, const char *fmt, ...) {
00499 char buf[BUFSIZ];
00500 va_list ap;
00501 FILE *fp;
00502 time_t timestamp;
00503
00504 va_start(ap, fmt);
00505 (void) vsnprintf(buf, sizeof(buf), fmt, ap);
00506 va_end(ap);
00507
00508
00509
00510
00511 conn->request_info.log_message = buf;
00512 if (call_user(conn, MG_EVENT_LOG) == NULL) {
00513 fp = conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
00514 mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
00515
00516 if (fp != NULL) {
00517 flockfile(fp);
00518 timestamp = time(NULL);
00519
00520 (void) fprintf(fp,
00521 "[%010lu] [error] [client %s] ",
00522 (unsigned long) timestamp,
00523 inet_ntoa(conn->client.rsa.u.sin.sin_addr));
00524
00525 if (conn->request_info.request_method != NULL) {
00526 (void) fprintf(fp, "%s %s: ",
00527 conn->request_info.request_method,
00528 conn->request_info.uri);
00529 }
00530
00531 (void) fprintf(fp, "%s", buf);
00532 fputc('\n', fp);
00533 funlockfile(fp);
00534 if (fp != stderr) {
00535 fclose(fp);
00536 }
00537 }
00538 }
00539 conn->request_info.log_message = NULL;
00540 }
00541
00542
00543 static const char *ssl_error(void) {
00544 unsigned long err;
00545 err = ERR_get_error();
00546 return err == 0 ? "" : ERR_error_string(err, NULL);
00547 }
00548
00549
00550
00551 static struct mg_connection *fc(struct mg_context *ctx) {
00552 static struct mg_connection fake_connection;
00553 fake_connection.ctx = ctx;
00554 return &fake_connection;
00555 }
00556
00557 const char *mg_version(void) {
00558 return MONGOOSE_VERSION;
00559 }
00560
00561 static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
00562 for (; *src != '\0' && n > 1; n--) {
00563 *dst++ = *src++;
00564 }
00565 *dst = '\0';
00566 }
00567
00568 static int lowercase(const char *s) {
00569 return tolower(* (const unsigned char *) s);
00570 }
00571
00572 static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
00573 int diff = 0;
00574
00575 if (len > 0)
00576 do {
00577 diff = lowercase(s1++) - lowercase(s2++);
00578 } while (diff == 0 && s1[-1] != '\0' && --len > 0);
00579
00580 return diff;
00581 }
00582
00583 static int mg_strcasecmp(const char *s1, const char *s2) {
00584 int diff;
00585
00586 do {
00587 diff = lowercase(s1++) - lowercase(s2++);
00588 } while (diff == 0 && s1[-1] != '\0');
00589
00590 return diff;
00591 }
00592
00593 static char * mg_strndup(const char *ptr, size_t len) {
00594 char *p;
00595
00596 if ((p = (char *) malloc(len + 1)) != NULL) {
00597 mg_strlcpy(p, ptr, len + 1);
00598 }
00599
00600 return p;
00601 }
00602
00603 static char * mg_strdup(const char *str) {
00604 return mg_strndup(str, strlen(str));
00605 }
00606
00607
00608
00609
00610
00611 static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
00612 const char *fmt, va_list ap) {
00613 int n;
00614
00615 if (buflen == 0)
00616 return 0;
00617
00618 n = vsnprintf(buf, buflen, fmt, ap);
00619
00620 if (n < 0) {
00621 cry(conn, "vsnprintf error");
00622 n = 0;
00623 } else if (n >= (int) buflen) {
00624 cry(conn, "truncating vsnprintf buffer: [%.*s]",
00625 n > 200 ? 200 : n, buf);
00626 n = (int) buflen - 1;
00627 }
00628 buf[n] = '\0';
00629
00630 return n;
00631 }
00632
00633 static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
00634 const char *fmt, ...) {
00635 va_list ap;
00636 int n;
00637
00638 va_start(ap, fmt);
00639 n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
00640 va_end(ap);
00641
00642 return n;
00643 }
00644
00645
00646
00647
00648
00649 static char *skip_quoted(char **buf, const char *delimiters, const char *whitespace, char quotechar) {
00650 char *p, *begin_word, *end_word, *end_whitespace;
00651
00652 begin_word = *buf;
00653 end_word = begin_word + strcspn(begin_word, delimiters);
00654
00655
00656 if (end_word > begin_word) {
00657 p = end_word - 1;
00658 while (*p == quotechar) {
00659
00660 if (*end_word == '\0') {
00661 *p = '\0';
00662 break;
00663 } else {
00664 size_t end_off = strcspn(end_word + 1, delimiters);
00665 memmove (p, end_word, end_off + 1);
00666 p += end_off;
00667 end_word += end_off + 1;
00668 }
00669 }
00670 for (p++; p < end_word; p++) {
00671 *p = '\0';
00672 }
00673 }
00674
00675 if (*end_word == '\0') {
00676 *buf = end_word;
00677 } else {
00678 end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
00679
00680 for (p = end_word; p < end_whitespace; p++) {
00681 *p = '\0';
00682 }
00683
00684 *buf = end_whitespace;
00685 }
00686
00687 return begin_word;
00688 }
00689
00690
00691 static char *skip(char **buf, const char *delimiters) {
00692 return skip_quoted(buf, delimiters, delimiters, 0);
00693 }
00694
00695
00696
00697 static const char *get_header(const struct mg_request_info *ri,
00698 const char *name) {
00699 int i;
00700
00701 for (i = 0; i < ri->num_headers; i++)
00702 if (!mg_strcasecmp(name, ri->http_headers[i].name))
00703 return ri->http_headers[i].value;
00704
00705 return NULL;
00706 }
00707
00708 const char *mg_get_header(const struct mg_connection *conn, const char *name) {
00709 return get_header(&conn->request_info, name);
00710 }
00711
00712
00713
00714
00715
00716
00717
00718 static const char *next_option(const char *list, struct vec *val,
00719 struct vec *eq_val) {
00720 if (list == NULL || *list == '\0') {
00721
00722 list = NULL;
00723 } else {
00724 val->ptr = list;
00725 if ((list = strchr(val->ptr, ',')) != NULL) {
00726
00727 val->len = list - val->ptr;
00728 list++;
00729 } else {
00730
00731 list = val->ptr + strlen(val->ptr);
00732 val->len = list - val->ptr;
00733 }
00734
00735 if (eq_val != NULL) {
00736
00737
00738
00739
00740 eq_val->len = 0;
00741 eq_val->ptr = memchr(val->ptr, '=', val->len);
00742 if (eq_val->ptr != NULL) {
00743 eq_val->ptr++;
00744 eq_val->len = val->ptr + val->len - eq_val->ptr;
00745 val->len = (eq_val->ptr - val->ptr) - 1;
00746 }
00747 }
00748 }
00749
00750 return list;
00751 }
00752
00753 #if !defined(NO_CGI)
00754 static int match_extension(const char *path, const char *ext_list) {
00755 struct vec ext_vec;
00756 size_t path_len;
00757
00758 path_len = strlen(path);
00759
00760 while ((ext_list = next_option(ext_list, &ext_vec, NULL)) != NULL)
00761 if (ext_vec.len < path_len &&
00762 mg_strncasecmp(path + path_len - ext_vec.len,
00763 ext_vec.ptr, ext_vec.len) == 0)
00764 return 1;
00765
00766 return 0;
00767 }
00768 #endif // !NO_CGI
00769
00770
00771
00772
00773 static int should_keep_alive(const struct mg_connection *conn) {
00774 const char *http_version = conn->request_info.http_version;
00775 const char *header = mg_get_header(conn, "Connection");
00776 return (header == NULL && http_version && !strcmp(http_version, "1.1")) ||
00777 (header != NULL && !mg_strcasecmp(header, "keep-alive"));
00778 }
00779
00780 static const char *suggest_connection_header(const struct mg_connection *conn) {
00781 return should_keep_alive(conn) ? "keep-alive" : "close";
00782 }
00783
00784 static void send_http_error(struct mg_connection *conn, int status,
00785 const char *reason, const char *fmt, ...) {
00786 char buf[BUFSIZ];
00787 va_list ap;
00788 int len;
00789
00790 conn->request_info.status_code = status;
00791
00792 if (call_user(conn, MG_HTTP_ERROR) == NULL) {
00793 buf[0] = '\0';
00794 len = 0;
00795
00796
00797 if (status > 199 && status != 204 && status != 304) {
00798 len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
00799 cry(conn, "%s", buf);
00800 buf[len++] = '\n';
00801
00802 va_start(ap, fmt);
00803 len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
00804 va_end(ap);
00805 }
00806 DEBUG_TRACE(("[%s]", buf));
00807
00808 mg_printf(conn, "HTTP/1.1 %d %s\r\n"
00809 "Content-Type: text/plain\r\n"
00810 "Content-Length: %d\r\n"
00811 "Connection: %s\r\n\r\n", status, reason, len,
00812 suggest_connection_header(conn));
00813 conn->num_bytes_sent += mg_printf(conn, "%s", buf);
00814 }
00815 }
00816
00817 #ifdef _WIN32
00818 static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
00819 unused = NULL;
00820 *mutex = CreateMutex(NULL, FALSE, NULL);
00821 return *mutex == NULL ? -1 : 0;
00822 }
00823
00824 static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
00825 return CloseHandle(*mutex) == 0 ? -1 : 0;
00826 }
00827
00828 static int pthread_mutex_lock(pthread_mutex_t *mutex) {
00829 return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
00830 }
00831
00832 static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
00833 return ReleaseMutex(*mutex) == 0 ? -1 : 0;
00834 }
00835
00836 static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
00837 unused = NULL;
00838 cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
00839 cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
00840 return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
00841 }
00842
00843 static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
00844 HANDLE handles[] = {cv->signal, cv->broadcast};
00845 ReleaseMutex(*mutex);
00846 WaitForMultipleObjects(2, handles, FALSE, INFINITE);
00847 return ReleaseMutex(*mutex) == 0 ? -1 : 0;
00848 }
00849
00850 static int pthread_cond_signal(pthread_cond_t *cv) {
00851 return SetEvent(cv->signal) == 0 ? -1 : 0;
00852 }
00853
00854 static int pthread_cond_broadcast(pthread_cond_t *cv) {
00855
00856
00857 return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
00858 }
00859
00860 static int pthread_cond_destroy(pthread_cond_t *cv) {
00861 return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
00862 }
00863
00864 static pthread_t pthread_self(void) {
00865 return GetCurrentThreadId();
00866 }
00867
00868
00869 static void change_slashes_to_backslashes(char *path) {
00870 int i;
00871
00872 for (i = 0; path[i] != '\0'; i++) {
00873 if (path[i] == '/')
00874 path[i] = '\\';
00875
00876 if (path[i] == '\\' && i > 0)
00877 while (path[i + 1] == '\\' || path[i + 1] == '/')
00878 (void) memmove(path + i + 1,
00879 path + i + 2, strlen(path + i + 1));
00880 }
00881 }
00882
00883
00884
00885 static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
00886 char buf[PATH_MAX], *p;
00887
00888 mg_strlcpy(buf, path, sizeof(buf));
00889 change_slashes_to_backslashes(buf);
00890
00891
00892 p = buf + strlen(buf) - 1;
00893
00894
00895 while (p > buf && *p == '\\' && p[-1] != ':') {
00896 *p-- = '\0';
00897 }
00898
00899
00900
00901
00902
00903 if (*p == 0x20 ||
00904 (*p == 0x2e && p > buf) ||
00905 *p == 0x2b ||
00906 (*p & ~0x7f)) {
00907 (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
00908 buf[0] = '\0';
00909 }
00910
00911 (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
00912 }
00913
00914 #if defined(_WIN32_WCE)
00915 static time_t time(time_t *ptime) {
00916 time_t t;
00917 SYSTEMTIME st;
00918 FILETIME ft;
00919
00920 GetSystemTime(&st);
00921 SystemTimeToFileTime(&st, &ft);
00922 t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
00923
00924 if (ptime != NULL) {
00925 *ptime = t;
00926 }
00927
00928 return t;
00929 }
00930
00931 static time_t mktime(struct tm *ptm) {
00932 SYSTEMTIME st;
00933 FILETIME ft, lft;
00934
00935 st.wYear = ptm->tm_year + 1900;
00936 st.wMonth = ptm->tm_mon + 1;
00937 st.wDay = ptm->tm_mday;
00938 st.wHour = ptm->tm_hour;
00939 st.wMinute = ptm->tm_min;
00940 st.wSecond = ptm->tm_sec;
00941 st.wMilliseconds = 0;
00942
00943 SystemTimeToFileTime(&st, &ft);
00944 LocalFileTimeToFileTime(&ft, &lft);
00945 return (time_t) ((MAKEUQUAD(lft.dwLowDateTime, lft.dwHighDateTime) -
00946 EPOCH_DIFF) / RATE_DIFF);
00947 }
00948
00949 static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
00950 int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
00951 FILETIME ft, lft;
00952 SYSTEMTIME st;
00953 TIME_ZONE_INFORMATION tzinfo;
00954
00955 if (ptm == NULL) {
00956 return NULL;
00957 }
00958
00959 * (int64_t *) &ft = t;
00960 FileTimeToLocalFileTime(&ft, &lft);
00961 FileTimeToSystemTime(&lft, &st);
00962 ptm->tm_year = st.wYear - 1900;
00963 ptm->tm_mon = st.wMonth - 1;
00964 ptm->tm_wday = st.wDayOfWeek;
00965 ptm->tm_mday = st.wDay;
00966 ptm->tm_hour = st.wHour;
00967 ptm->tm_min = st.wMinute;
00968 ptm->tm_sec = st.wSecond;
00969 ptm->tm_yday = 0;
00970 ptm->tm_isdst =
00971 GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
00972
00973 return ptm;
00974 }
00975
00976 static size_t strftime(char *dst, size_t dst_size, const char *fmt,
00977 const struct tm *tm) {
00978 (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
00979 return 0;
00980 }
00981 #endif
00982
00983 static int mg_rename(const char* oldname, const char* newname) {
00984 wchar_t woldbuf[PATH_MAX];
00985 wchar_t wnewbuf[PATH_MAX];
00986
00987 to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
00988 to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
00989
00990 return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
00991 }
00992
00993
00994 static FILE *mg_fopen(const char *path, const char *mode) {
00995 wchar_t wbuf[PATH_MAX], wmode[20];
00996
00997 to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
00998 MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
00999
01000 return _wfopen(wbuf, wmode);
01001 }
01002
01003 static int mg_stat(const char *path, struct mgstat *stp) {
01004 int ok = -1;
01005 wchar_t wbuf[PATH_MAX];
01006 WIN32_FILE_ATTRIBUTE_DATA info;
01007
01008 to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
01009
01010 if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
01011 stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
01012 stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
01013 info.ftLastWriteTime.dwHighDateTime);
01014 stp->is_directory =
01015 info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
01016 ok = 0;
01017 }
01018
01019 return ok;
01020 }
01021
01022 static int mg_remove(const char *path) {
01023 wchar_t wbuf[PATH_MAX];
01024 to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
01025 return DeleteFileW(wbuf) ? 0 : -1;
01026 }
01027
01028 static int mg_mkdir(const char *path, int mode) {
01029 char buf[PATH_MAX];
01030 wchar_t wbuf[PATH_MAX];
01031
01032 mode = 0;
01033 mg_strlcpy(buf, path, sizeof(buf));
01034 change_slashes_to_backslashes(buf);
01035
01036 (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
01037
01038 return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
01039 }
01040
01041
01042 static DIR * opendir(const char *name) {
01043 DIR *dir = NULL;
01044 wchar_t wpath[PATH_MAX];
01045 DWORD attrs;
01046
01047 if (name == NULL) {
01048 SetLastError(ERROR_BAD_ARGUMENTS);
01049 } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
01050 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
01051 } else {
01052 to_unicode(name, wpath, ARRAY_SIZE(wpath));
01053 attrs = GetFileAttributesW(wpath);
01054 if (attrs != 0xFFFFFFFF &&
01055 ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
01056 (void) wcscat(wpath, L"\\*");
01057 dir->handle = FindFirstFileW(wpath, &dir->info);
01058 dir->result.d_name[0] = '\0';
01059 } else {
01060 free(dir);
01061 dir = NULL;
01062 }
01063 }
01064
01065 return dir;
01066 }
01067
01068 static int closedir(DIR *dir) {
01069 int result = 0;
01070
01071 if (dir != NULL) {
01072 if (dir->handle != INVALID_HANDLE_VALUE)
01073 result = FindClose(dir->handle) ? 0 : -1;
01074
01075 free(dir);
01076 } else {
01077 result = -1;
01078 SetLastError(ERROR_BAD_ARGUMENTS);
01079 }
01080
01081 return result;
01082 }
01083
01084 struct dirent * readdir(DIR *dir) {
01085 struct dirent *result = 0;
01086
01087 if (dir) {
01088 if (dir->handle != INVALID_HANDLE_VALUE) {
01089 result = &dir->result;
01090 (void) WideCharToMultiByte(CP_UTF8, 0,
01091 dir->info.cFileName, -1, result->d_name,
01092 sizeof(result->d_name), NULL, NULL);
01093
01094 if (!FindNextFileW(dir->handle, &dir->info)) {
01095 (void) FindClose(dir->handle);
01096 dir->handle = INVALID_HANDLE_VALUE;
01097 }
01098
01099 } else {
01100 SetLastError(ERROR_FILE_NOT_FOUND);
01101 }
01102 } else {
01103 SetLastError(ERROR_BAD_ARGUMENTS);
01104 }
01105
01106 return result;
01107 }
01108
01109 #define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
01110
01111 static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
01112 void *param) {
01113 HANDLE hThread;
01114 ctx = NULL;
01115
01116 hThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) func, param, 0,
01117 NULL);
01118 if (hThread != NULL) {
01119 (void) CloseHandle(hThread);
01120 }
01121
01122 return hThread == NULL ? -1 : 0;
01123 }
01124
01125 static HANDLE dlopen(const char *dll_name, int flags) {
01126 wchar_t wbuf[PATH_MAX];
01127 flags = 0;
01128 to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
01129 return LoadLibraryW(wbuf);
01130 }
01131
01132 #if !defined(NO_CGI)
01133 #define SIGKILL 0
01134 static int kill(pid_t pid, int sig_num) {
01135 (void) TerminateProcess(pid, sig_num);
01136 (void) CloseHandle(pid);
01137 return 0;
01138 }
01139
01140 static pid_t spawn_process(struct mg_connection *conn, const char *prog,
01141 char *envblk, char *envp[], int fd_stdin,
01142 int fd_stdout, const char *dir) {
01143 HANDLE me;
01144 char *p, *interp, cmdline[PATH_MAX], buf[PATH_MAX];
01145 FILE *fp;
01146 STARTUPINFOA si;
01147 PROCESS_INFORMATION pi;
01148
01149 envp = NULL;
01150
01151 (void) memset(&si, 0, sizeof(si));
01152 (void) memset(&pi, 0, sizeof(pi));
01153
01154
01155 si.cb = sizeof(si);
01156 si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
01157 si.wShowWindow = SW_HIDE;
01158
01159 me = GetCurrentProcess();
01160 (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
01161 &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
01162 (void) DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
01163 &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
01164
01165
01166 interp = conn->ctx->config[CGI_INTERPRETER];
01167 if (interp == NULL) {
01168 buf[2] = '\0';
01169 if ((fp = fopen(cmdline, "r")) != NULL) {
01170 (void) fgets(buf, sizeof(buf), fp);
01171 if (buf[0] != '#' || buf[1] != '!') {
01172
01173 buf[2] = '\0';
01174 } else {
01175
01176 for (p = &buf[strlen(buf) - 1]; p > buf && isspace(*p); p--) {
01177 *p = '\0';
01178 }
01179 }
01180 (void) fclose(fp);
01181 }
01182 interp = buf + 2;
01183 }
01184
01185 (void) mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s%c%s",
01186 interp, interp[0] == '\0' ? "" : " ", dir, DIRSEP, prog);
01187
01188 DEBUG_TRACE(("Running [%s]", cmdline));
01189 if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
01190 CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
01191 cry(conn, "%s: CreateProcess(%s): %d",
01192 __func__, cmdline, ERRNO);
01193 pi.hProcess = (pid_t) -1;
01194 } else {
01195 (void) close(fd_stdin);
01196 (void) close(fd_stdout);
01197 }
01198
01199 (void) CloseHandle(si.hStdOutput);
01200 (void) CloseHandle(si.hStdInput);
01201 (void) CloseHandle(pi.hThread);
01202
01203 return (pid_t) pi.hProcess;
01204 }
01205 #endif
01206
01207 static int set_non_blocking_mode(SOCKET sock) {
01208 unsigned long on = 1;
01209 return ioctlsocket(sock, FIONBIO, &on);
01210 }
01211
01212 #else
01213 static int mg_stat(const char *path, struct mgstat *stp) {
01214 struct stat st;
01215 int ok;
01216
01217 if (stat(path, &st) == 0) {
01218 ok = 0;
01219 stp->size = st.st_size;
01220 stp->mtime = st.st_mtime;
01221 stp->is_directory = S_ISDIR(st.st_mode);
01222 } else {
01223 ok = -1;
01224 }
01225
01226 return ok;
01227 }
01228
01229 static void set_close_on_exec(int fd) {
01230 (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
01231 }
01232
01233 static int start_thread(struct mg_context *ctx, mg_thread_func_t func,
01234 void *param) {
01235 pthread_t thread_id;
01236 pthread_attr_t attr;
01237 int retval;
01238
01239 (void) pthread_attr_init(&attr);
01240 (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
01241
01242
01243
01244 if ((retval = pthread_create(&thread_id, &attr, func, param)) != 0) {
01245 cry(fc(ctx), "%s: %s", __func__, strerror(retval));
01246 }
01247
01248 return retval;
01249 }
01250
01251 #ifndef NO_CGI
01252 static pid_t spawn_process(struct mg_connection *conn, const char *prog,
01253 char *envblk, char *envp[], int fd_stdin,
01254 int fd_stdout, const char *dir) {
01255 pid_t pid;
01256 const char *interp;
01257
01258 envblk = NULL;
01259
01260 if ((pid = fork()) == -1) {
01261
01262 send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
01263 } else if (pid == 0) {
01264
01265 if (chdir(dir) != 0) {
01266 cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
01267 } else if (dup2(fd_stdin, 0) == -1) {
01268 cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
01269 } else if (dup2(fd_stdout, 1) == -1) {
01270 cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
01271 } else {
01272 (void) dup2(fd_stdout, 2);
01273 (void) close(fd_stdin);
01274 (void) close(fd_stdout);
01275
01276
01277 interp = conn->ctx->config[CGI_INTERPRETER];
01278 if (interp == NULL) {
01279 (void) execle(prog, prog, NULL, envp);
01280 cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
01281 } else {
01282 (void) execle(interp, interp, prog, NULL, envp);
01283 cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
01284 strerror(ERRNO));
01285 }
01286 }
01287 exit(EXIT_FAILURE);
01288 } else {
01289
01290 (void) close(fd_stdin);
01291 (void) close(fd_stdout);
01292 }
01293
01294 return pid;
01295 }
01296 #endif // !NO_CGI
01297
01298 static int set_non_blocking_mode(SOCKET sock) {
01299 int flags;
01300
01301 flags = fcntl(sock, F_GETFL, 0);
01302 (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
01303
01304 return 0;
01305 }
01306 #endif // _WIN32
01307
01308
01309
01310 static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
01311 int64_t len) {
01312 int64_t sent;
01313 int n, k;
01314
01315 sent = 0;
01316 while (sent < len) {
01317
01318
01319 k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
01320
01321 if (ssl != NULL) {
01322 n = SSL_write(ssl, buf + sent, k);
01323 } else if (fp != NULL) {
01324 n = fwrite(buf + sent, 1, (size_t)k, fp);
01325 if (ferror(fp))
01326 n = -1;
01327 } else {
01328 n = send(sock, buf + sent, (size_t)k, 0);
01329 }
01330
01331 if (n < 0)
01332 break;
01333
01334 sent += n;
01335 }
01336
01337 return sent;
01338 }
01339
01340
01341
01342 static int pull(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int len) {
01343 int nread;
01344
01345 if (ssl != NULL) {
01346 nread = SSL_read(ssl, buf, len);
01347 } else if (fp != NULL) {
01348
01349
01350
01351 nread = read(fileno(fp), buf, (size_t) len);
01352 if (ferror(fp))
01353 nread = -1;
01354 } else {
01355 nread = recv(sock, buf, (size_t) len, 0);
01356 }
01357
01358 return nread;
01359 }
01360
01361 int mg_read(struct mg_connection *conn, void *buf, size_t len) {
01362 int n, buffered_len, nread;
01363 const char *buffered;
01364
01365 assert(conn->content_len >= conn->consumed_content);
01366 DEBUG_TRACE(("%p %zu %lld %lld", buf, len,
01367 conn->content_len, conn->consumed_content));
01368 nread = 0;
01369 if (conn->consumed_content < conn->content_len) {
01370
01371
01372 int64_t to_read = conn->content_len - conn->consumed_content;
01373 if (to_read < (int64_t) len) {
01374 len = (int) to_read;
01375 }
01376
01377
01378 buffered = conn->buf + conn->request_len + conn->consumed_content;
01379 buffered_len = conn->data_len - conn->request_len;
01380 assert(buffered_len >= 0);
01381
01382
01383 if (conn->consumed_content < (int64_t) buffered_len) {
01384 buffered_len -= (int) conn->consumed_content;
01385 if (len < (size_t) buffered_len) {
01386 buffered_len = len;
01387 }
01388 memcpy(buf, buffered, (size_t)buffered_len);
01389 len -= buffered_len;
01390 buf = (char *) buf + buffered_len;
01391 conn->consumed_content += buffered_len;
01392 nread = buffered_len;
01393 }
01394
01395
01396 while (len > 0) {
01397 n = pull(NULL, conn->client.sock, conn->ssl, (char *) buf, (int) len);
01398 if (n <= 0) {
01399 break;
01400 }
01401 buf = (char *) buf + n;
01402 conn->consumed_content += n;
01403 nread += n;
01404 len -= n;
01405 }
01406 }
01407 return nread;
01408 }
01409
01410 int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
01411 return (int) push(NULL, conn->client.sock, conn->ssl,
01412 (const char *) buf, (int64_t) len);
01413 }
01414
01415 int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
01416 char buf[BUFSIZ];
01417 int len;
01418 va_list ap;
01419
01420 va_start(ap, fmt);
01421 len = mg_vsnprintf(conn, buf, sizeof(buf), fmt, ap);
01422 va_end(ap);
01423
01424 return mg_write(conn, buf, (size_t)len);
01425 }
01426
01427
01428
01429
01430
01431
01432 static size_t url_decode(const char *src, size_t src_len, char *dst,
01433 size_t dst_len, int is_form_url_encoded) {
01434 size_t i, j;
01435 int a, b;
01436 #define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
01437
01438 for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
01439 if (src[i] == '%' &&
01440 isxdigit(* (const unsigned char *) (src + i + 1)) &&
01441 isxdigit(* (const unsigned char *) (src + i + 2))) {
01442 a = tolower(* (const unsigned char *) (src + i + 1));
01443 b = tolower(* (const unsigned char *) (src + i + 2));
01444 dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
01445 i += 2;
01446 } else if (is_form_url_encoded && src[i] == '+') {
01447 dst[j] = ' ';
01448 } else {
01449 dst[j] = src[i];
01450 }
01451 }
01452
01453 dst[j] = '\0';
01454
01455 return j;
01456 }
01457
01458
01459
01460
01461
01462 int mg_get_var(const char *buf, size_t buf_len, const char *name,
01463 char *dst, size_t dst_len) {
01464 const char *p, *e, *s;
01465 size_t name_len, len;
01466
01467 name_len = strlen(name);
01468 e = buf + buf_len;
01469 len = -1;
01470 dst[0] = '\0';
01471
01472
01473 for (p = buf; p != NULL && p + name_len < e; p++) {
01474 if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
01475 !mg_strncasecmp(name, p, name_len)) {
01476
01477
01478 p += name_len + 1;
01479
01480
01481 s = (const char *) memchr(p, '&', (size_t)(e - p));
01482 if (s == NULL) {
01483 s = e;
01484 }
01485 assert(s >= p);
01486
01487
01488 if ((size_t) (s - p) < dst_len) {
01489 len = url_decode(p, (size_t)(s - p), dst, dst_len, 1);
01490 }
01491 break;
01492 }
01493 }
01494
01495 return len;
01496 }
01497
01498 int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
01499 char *dst, size_t dst_size) {
01500 const char *s, *p, *end;
01501 int name_len, len = -1;
01502
01503 dst[0] = '\0';
01504 if ((s = mg_get_header(conn, "Cookie")) == NULL) {
01505 return 0;
01506 }
01507
01508 name_len = strlen(cookie_name);
01509 end = s + strlen(s);
01510
01511 for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
01512 if (s[name_len] == '=') {
01513 s += name_len + 1;
01514 if ((p = strchr(s, ' ')) == NULL)
01515 p = end;
01516 if (p[-1] == ';')
01517 p--;
01518 if (*s == '"' && p[-1] == '"' && p > s + 1) {
01519 s++;
01520 p--;
01521 }
01522 if ((size_t) (p - s) < dst_size) {
01523 len = (p - s) + 1;
01524 mg_strlcpy(dst, s, (size_t)len);
01525 }
01526 break;
01527 }
01528
01529 return len;
01530 }
01531
01532
01533
01534
01535 static int get_document_root(const struct mg_connection *conn,
01536 struct vec *document_root) {
01537 const char *root, *uri;
01538 int len_of_matched_uri;
01539 struct vec uri_vec, path_vec;
01540
01541 uri = conn->request_info.uri;
01542 len_of_matched_uri = 0;
01543 root = next_option(conn->ctx->config[DOCUMENT_ROOT], document_root, NULL);
01544
01545 while ((root = next_option(root, &uri_vec, &path_vec)) != NULL) {
01546 if (memcmp(uri, uri_vec.ptr, uri_vec.len) == 0) {
01547 *document_root = path_vec;
01548 len_of_matched_uri = uri_vec.len;
01549 break;
01550 }
01551 }
01552
01553 return len_of_matched_uri;
01554 }
01555
01556 static void convert_uri_to_file_name(struct mg_connection *conn,
01557 const char *uri, char *buf,
01558 size_t buf_len) {
01559 struct vec vec;
01560 int match_len;
01561
01562 match_len = get_document_root(conn, &vec);
01563 mg_snprintf(conn, buf, buf_len, "%.*s%s", vec.len, vec.ptr, uri + match_len);
01564
01565 #ifdef _WIN32
01566 change_slashes_to_backslashes(buf);
01567 #endif
01568
01569 DEBUG_TRACE(("[%s] -> [%s], [%.*s]", uri, buf, (int) vec.len, vec.ptr));
01570 }
01571
01572 static int sslize(struct mg_connection *conn, int (*func)(SSL *)) {
01573 return (conn->ssl = SSL_new(conn->ctx->ssl_ctx)) != NULL &&
01574 SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
01575 func(conn->ssl) == 1;
01576 }
01577
01578 static struct mg_connection *mg_connect(struct mg_connection *conn,
01579 const char *host, int port, int use_ssl) {
01580 struct mg_connection *newconn = NULL;
01581 struct sockaddr_in sin;
01582 struct hostent *he;
01583 int sock;
01584
01585 if (conn->ctx->ssl_ctx == NULL && use_ssl) {
01586 cry(conn, "%s: SSL is not initialized", __func__);
01587 } else if ((he = gethostbyname(host)) == NULL) {
01588 cry(conn, "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
01589 } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
01590 cry(conn, "%s: socket: %s", __func__, strerror(ERRNO));
01591 } else {
01592 sin.sin_family = AF_INET;
01593 sin.sin_port = htons((uint16_t) port);
01594 sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
01595 if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
01596 cry(conn, "%s: connect(%s:%d): %s", __func__, host, port,
01597 strerror(ERRNO));
01598 closesocket(sock);
01599 } else if ((newconn = calloc(1, sizeof(*newconn))) == NULL) {
01600 cry(conn, "%s: calloc: %s", __func__, strerror(ERRNO));
01601 closesocket(sock);
01602 } else {
01603 newconn->client.sock = sock;
01604 newconn->client.rsa.u.sin = sin;
01605 if (use_ssl) {
01606 sslize(newconn, SSL_connect);
01607 }
01608 }
01609 }
01610
01611 return newconn;
01612 }
01613
01614
01615
01616
01617
01618 static int get_request_len(const char *buf, int buflen) {
01619 const char *s, *e;
01620 int len = 0;
01621
01622 DEBUG_TRACE(("buf: %p, len: %d", buf, buflen));
01623 for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
01624
01625 if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
01626 *s != '\n' && * (const unsigned char *) s < 128) {
01627 len = -1;
01628 } else if (s[0] == '\n' && s[1] == '\n') {
01629 len = (int) (s - buf) + 2;
01630 } else if (s[0] == '\n' && &s[1] < e &&
01631 s[1] == '\r' && s[2] == '\n') {
01632 len = (int) (s - buf) + 3;
01633 }
01634
01635 return len;
01636 }
01637
01638
01639 static int month_number_to_month_name(const char *s) {
01640 size_t i;
01641
01642 for (i = 0; i < ARRAY_SIZE(month_names); i++)
01643 if (!strcmp(s, month_names[i]))
01644 return (int) i;
01645
01646 return -1;
01647 }
01648
01649
01650 static time_t parse_date_string(const char *s) {
01651 time_t current_time;
01652 struct tm tm, *tmp;
01653 char mon[32];
01654 int sec, min, hour, mday, month, year;
01655
01656 (void) memset(&tm, 0, sizeof(tm));
01657 sec = min = hour = mday = month = year = 0;
01658
01659 if (((sscanf(s, "%d/%3s/%d %d:%d:%d",
01660 &mday, mon, &year, &hour, &min, &sec) == 6) ||
01661 (sscanf(s, "%d %3s %d %d:%d:%d",
01662 &mday, mon, &year, &hour, &min, &sec) == 6) ||
01663 (sscanf(s, "%*3s, %d %3s %d %d:%d:%d",
01664 &mday, mon, &year, &hour, &min, &sec) == 6) ||
01665 (sscanf(s, "%d-%3s-%d %d:%d:%d",
01666 &mday, mon, &year, &hour, &min, &sec) == 6)) &&
01667 (month = month_number_to_month_name(mon)) != -1) {
01668 tm.tm_mday = mday;
01669 tm.tm_mon = month;
01670 tm.tm_year = year;
01671 tm.tm_hour = hour;
01672 tm.tm_min = min;
01673 tm.tm_sec = sec;
01674 }
01675
01676 if (tm.tm_year > 1900) {
01677 tm.tm_year -= 1900;
01678 } else if (tm.tm_year < 70) {
01679 tm.tm_year += 100;
01680 }
01681
01682
01683 current_time = time(NULL);
01684 tmp = localtime(¤t_time);
01685 tm.tm_isdst = tmp->tm_isdst;
01686
01687 return mktime(&tm);
01688 }
01689
01690
01691
01692 static void remove_double_dots_and_double_slashes(char *s) {
01693 char *p = s;
01694
01695 while (*s != '\0') {
01696 *p++ = *s++;
01697 if (s[-1] == '/' || s[-1] == '\\') {
01698
01699 while (*s == '/' || *s == '\\') {
01700 s++;
01701 }
01702
01703
01704 while (*s == '.' && s[1] == '.') {
01705 s += 2;
01706 }
01707 }
01708 }
01709 *p = '\0';
01710 }
01711
01712 static const struct {
01713 const char *extension;
01714 size_t ext_len;
01715 const char *mime_type;
01716 size_t mime_type_len;
01717 } builtin_mime_types[] = {
01718 {".html", 5, "text/html", 9},
01719 {".htm", 4, "text/html", 9},
01720 {".shtm", 5, "text/html", 9},
01721 {".shtml", 6, "text/html", 9},
01722 {".css", 4, "text/css", 8},
01723 {".js", 3, "application/x-javascript", 24},
01724 {".ico", 4, "image/x-icon", 12},
01725 {".gif", 4, "image/gif", 9},
01726 {".jpg", 4, "image/jpeg", 10},
01727 {".jpeg", 5, "image/jpeg", 10},
01728 {".png", 4, "image/png", 9},
01729 {".svg", 4, "image/svg+xml", 13},
01730 {".torrent", 8, "application/x-bittorrent", 24},
01731 {".wav", 4, "audio/x-wav", 11},
01732 {".mp3", 4, "audio/x-mp3", 11},
01733 {".mid", 4, "audio/mid", 9},
01734 {".m3u", 4, "audio/x-mpegurl", 15},
01735 {".ram", 4, "audio/x-pn-realaudio", 20},
01736 {".xml", 4, "text/xml", 8},
01737 {".xslt", 5, "application/xml", 15},
01738 {".ra", 3, "audio/x-pn-realaudio", 20},
01739 {".doc", 4, "application/msword", 19},
01740 {".exe", 4, "application/octet-stream", 24},
01741 {".zip", 4, "application/x-zip-compressed", 28},
01742 {".xls", 4, "application/excel", 17},
01743 {".tgz", 4, "application/x-tar-gz", 20},
01744 {".tar", 4, "application/x-tar", 17},
01745 {".gz", 3, "application/x-gunzip", 20},
01746 {".arj", 4, "application/x-arj-compressed", 28},
01747 {".rar", 4, "application/x-arj-compressed", 28},
01748 {".rtf", 4, "application/rtf", 15},
01749 {".pdf", 4, "application/pdf", 15},
01750 {".swf", 4, "application/x-shockwave-flash",29},
01751 {".mpg", 4, "video/mpeg", 10},
01752 {".mpeg", 5, "video/mpeg", 10},
01753 {".asf", 4, "video/x-ms-asf", 14},
01754 {".avi", 4, "video/x-msvideo", 15},
01755 {".bmp", 4, "image/bmp", 9},
01756 {NULL, 0, NULL, 0}
01757 };
01758
01759
01760
01761 static void get_mime_type(struct mg_context *ctx, const char *path,
01762 struct vec *vec) {
01763 struct vec ext_vec, mime_vec;
01764 const char *list, *ext;
01765 size_t i, path_len;
01766
01767 path_len = strlen(path);
01768
01769
01770
01771 list = ctx->config[EXTRA_MIME_TYPES];
01772 while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
01773
01774 ext = path + path_len - ext_vec.len;
01775 if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
01776 *vec = mime_vec;
01777 return;
01778 }
01779 }
01780
01781
01782 for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
01783 ext = path + (path_len - builtin_mime_types[i].ext_len);
01784 if (path_len > builtin_mime_types[i].ext_len &&
01785 mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
01786 vec->ptr = builtin_mime_types[i].mime_type;
01787 vec->len = builtin_mime_types[i].mime_type_len;
01788 return;
01789 }
01790 }
01791
01792
01793 vec->ptr = "text/plain";
01794 vec->len = 10;
01795 }
01796
01797 #ifndef HAVE_MD5
01798 typedef struct MD5Context {
01799 uint32_t buf[4];
01800 uint32_t bits[2];
01801 unsigned char in[64];
01802 } MD5_CTX;
01803
01804 #if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
01805 #define byteReverse(buf, len) // Do nothing
01806 #else
01807 static void byteReverse(unsigned char *buf, unsigned longs) {
01808 uint32_t t;
01809 do {
01810 t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
01811 ((unsigned) buf[1] << 8 | buf[0]);
01812 *(uint32_t *) buf = t;
01813 buf += 4;
01814 } while (--longs);
01815 }
01816 #endif
01817
01818 #define F1(x, y, z) (z ^ (x & (y ^ z)))
01819 #define F2(x, y, z) F1(z, x, y)
01820 #define F3(x, y, z) (x ^ y ^ z)
01821 #define F4(x, y, z) (y ^ (x | ~z))
01822
01823 #define MD5STEP(f, w, x, y, z, data, s) \
01824 ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
01825
01826
01827
01828 static void MD5Init(MD5_CTX *ctx) {
01829 ctx->buf[0] = 0x67452301;
01830 ctx->buf[1] = 0xefcdab89;
01831 ctx->buf[2] = 0x98badcfe;
01832 ctx->buf[3] = 0x10325476;
01833
01834 ctx->bits[0] = 0;
01835 ctx->bits[1] = 0;
01836 }
01837
01838 static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
01839 register uint32_t a, b, c, d;
01840
01841 a = buf[0];
01842 b = buf[1];
01843 c = buf[2];
01844 d = buf[3];
01845
01846 MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
01847 MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
01848 MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
01849 MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
01850 MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
01851 MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
01852 MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
01853 MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
01854 MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
01855 MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
01856 MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
01857 MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
01858 MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
01859 MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
01860 MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
01861 MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
01862
01863 MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
01864 MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
01865 MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
01866 MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
01867 MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
01868 MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
01869 MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
01870 MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
01871 MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
01872 MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
01873 MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
01874 MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
01875 MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
01876 MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
01877 MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
01878 MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
01879
01880 MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
01881 MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
01882 MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
01883 MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
01884 MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
01885 MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
01886 MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
01887 MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
01888 MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
01889 MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
01890 MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
01891 MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
01892 MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
01893 MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
01894 MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
01895 MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
01896
01897 MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
01898 MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
01899 MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
01900 MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
01901 MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
01902 MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
01903 MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
01904 MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
01905 MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
01906 MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
01907 MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
01908 MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
01909 MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
01910 MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
01911 MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
01912 MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
01913
01914 buf[0] += a;
01915 buf[1] += b;
01916 buf[2] += c;
01917 buf[3] += d;
01918 }
01919
01920 static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
01921 uint32_t t;
01922
01923 t = ctx->bits[0];
01924 if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
01925 ctx->bits[1]++;
01926 ctx->bits[1] += len >> 29;
01927
01928 t = (t >> 3) & 0x3f;
01929
01930 if (t) {
01931 unsigned char *p = (unsigned char *) ctx->in + t;
01932
01933 t = 64 - t;
01934 if (len < t) {
01935 memcpy(p, buf, len);
01936 return;
01937 }
01938 memcpy(p, buf, t);
01939 byteReverse(ctx->in, 16);
01940 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
01941 buf += t;
01942 len -= t;
01943 }
01944
01945 while (len >= 64) {
01946 memcpy(ctx->in, buf, 64);
01947 byteReverse(ctx->in, 16);
01948 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
01949 buf += 64;
01950 len -= 64;
01951 }
01952
01953 memcpy(ctx->in, buf, len);
01954 }
01955
01956 static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
01957 unsigned count;
01958 unsigned char *p;
01959
01960 count = (ctx->bits[0] >> 3) & 0x3F;
01961
01962 p = ctx->in + count;
01963 *p++ = 0x80;
01964 count = 64 - 1 - count;
01965 if (count < 8) {
01966 memset(p, 0, count);
01967 byteReverse(ctx->in, 16);
01968 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
01969 memset(ctx->in, 0, 56);
01970 } else {
01971 memset(p, 0, count - 8);
01972 }
01973 byteReverse(ctx->in, 14);
01974
01975 ((uint32_t *) ctx->in)[14] = ctx->bits[0];
01976 ((uint32_t *) ctx->in)[15] = ctx->bits[1];
01977
01978 MD5Transform(ctx->buf, (uint32_t *) ctx->in);
01979 byteReverse((unsigned char *) ctx->buf, 4);
01980 memcpy(digest, ctx->buf, 16);
01981 memset((char *) ctx, 0, sizeof(ctx));
01982 }
01983 #endif // !HAVE_MD5
01984
01985
01986
01987 static void bin2str(char *to, const unsigned char *p, size_t len) {
01988 static const char *hex = "0123456789abcdef";
01989
01990 for (; len--; p++) {
01991 *to++ = hex[p[0] >> 4];
01992 *to++ = hex[p[0] & 0x0f];
01993 }
01994 *to = '\0';
01995 }
01996
01997
01998 void mg_md5(char *buf, ...) {
01999 unsigned char hash[16];
02000 const char *p;
02001 va_list ap;
02002 MD5_CTX ctx;
02003
02004 MD5Init(&ctx);
02005
02006 va_start(ap, buf);
02007 while ((p = va_arg(ap, const char *)) != NULL) {
02008 MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
02009 }
02010 va_end(ap);
02011
02012 MD5Final(hash, &ctx);
02013 bin2str(buf, hash, sizeof(hash));
02014 }
02015
02016
02017 static int check_password(const char *method, const char *ha1, const char *uri,
02018 const char *nonce, const char *nc, const char *cnonce,
02019 const char *qop, const char *response) {
02020 char ha2[32 + 1], expected_response[32 + 1];
02021
02022
02023 if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
02024 qop == NULL || response == NULL) {
02025 return 0;
02026 }
02027
02028
02029
02030 if (
02031 strlen(response) != 32
02032
02033 ) {
02034 return 0;
02035 }
02036
02037 mg_md5(ha2, method, ":", uri, NULL);
02038 mg_md5(expected_response, ha1, ":", nonce, ":", nc,
02039 ":", cnonce, ":", qop, ":", ha2, NULL);
02040
02041 return mg_strcasecmp(response, expected_response) == 0;
02042 }
02043
02044
02045
02046 static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
02047 struct mg_context *ctx = conn->ctx;
02048 char name[PATH_MAX];
02049 const char *p, *e;
02050 struct mgstat st;
02051 FILE *fp;
02052
02053 if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
02054
02055 fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
02056 if (fp == NULL)
02057 cry(fc(ctx), "fopen(%s): %s",
02058 ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
02059 } else if (!mg_stat(path, &st) && st.is_directory) {
02060 (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
02061 path, DIRSEP, PASSWORDS_FILE_NAME);
02062 fp = mg_fopen(name, "r");
02063 } else {
02064
02065 for (p = path, e = p + strlen(p) - 1; e > p; e--)
02066 if (IS_DIRSEP_CHAR(*e))
02067 break;
02068 (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
02069 (int) (e - p), p, DIRSEP, PASSWORDS_FILE_NAME);
02070 fp = mg_fopen(name, "r");
02071 }
02072
02073 return fp;
02074 }
02075
02076
02077 struct ah {
02078 char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
02079 };
02080
02081 static int parse_auth_header(struct mg_connection *conn, char *buf,
02082 size_t buf_size, struct ah *ah) {
02083 char *name, *value, *s;
02084 const char *auth_header;
02085
02086 if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
02087 mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
02088 return 0;
02089 }
02090
02091
02092 (void) mg_strlcpy(buf, auth_header + 7, buf_size);
02093
02094 s = buf;
02095 (void) memset(ah, 0, sizeof(*ah));
02096
02097
02098 for (;;) {
02099
02100 while (isspace(* (unsigned char *) s)) {
02101 s++;
02102 }
02103 name = skip_quoted(&s, "=", " ", 0);
02104
02105 if (s[0] == '\"') {
02106 s++;
02107 value = skip_quoted(&s, "\"", " ", '\\');
02108 if (s[0] == ',') {
02109 s++;
02110 }
02111 }
02112 else
02113 {
02114 value = skip_quoted(&s, ", ", " ", 0);
02115 }
02116 if (*name == '\0') {
02117 break;
02118 }
02119
02120 if (!strcmp(name, "username")) {
02121 ah->user = value;
02122 } else if (!strcmp(name, "cnonce")) {
02123 ah->cnonce = value;
02124 } else if (!strcmp(name, "response")) {
02125 ah->response = value;
02126 } else if (!strcmp(name, "uri")) {
02127 ah->uri = value;
02128 } else if (!strcmp(name, "qop")) {
02129 ah->qop = value;
02130 } else if (!strcmp(name, "nc")) {
02131 ah->nc = value;
02132 } else if (!strcmp(name, "nonce")) {
02133 ah->nonce = value;
02134 }
02135 }
02136
02137
02138 if (ah->user != NULL) {
02139 conn->request_info.remote_user = mg_strdup(ah->user);
02140 } else {
02141 return 0;
02142 }
02143
02144 return 1;
02145 }
02146
02147
02148 static int authorize(struct mg_connection *conn, FILE *fp) {
02149 struct ah ah;
02150 char line[256], f_user[256], ha1[256], f_domain[256], buf[BUFSIZ];
02151
02152 if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
02153 return 0;
02154 }
02155
02156
02157 while (fgets(line, sizeof(line), fp) != NULL) {
02158 if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
02159 continue;
02160 }
02161
02162 if (!strcmp(ah.user, f_user) &&
02163 !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
02164 return check_password(
02165 conn->request_info.request_method,
02166 ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
02167 ah.response);
02168 }
02169
02170 return 0;
02171 }
02172
02173
02174 static int check_authorization(struct mg_connection *conn, const char *path) {
02175 FILE *fp;
02176 char fname[PATH_MAX];
02177 struct vec uri_vec, filename_vec;
02178 const char *list;
02179 int authorized;
02180
02181 fp = NULL;
02182 authorized = 1;
02183
02184 list = conn->ctx->config[PROTECT_URI];
02185 while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
02186 if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
02187 (void) mg_snprintf(conn, fname, sizeof(fname), "%.*s",
02188 filename_vec.len, filename_vec.ptr);
02189 if ((fp = mg_fopen(fname, "r")) == NULL) {
02190 cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
02191 }
02192 break;
02193 }
02194 }
02195
02196 if (fp == NULL) {
02197 fp = open_auth_file(conn, path);
02198 }
02199
02200 if (fp != NULL) {
02201 authorized = authorize(conn, fp);
02202 (void) fclose(fp);
02203 }
02204
02205 return authorized;
02206 }
02207
02208 static void send_authorization_request(struct mg_connection *conn) {
02209 conn->request_info.status_code = 401;
02210 (void) mg_printf(conn,
02211 "HTTP/1.1 401 Unauthorized\r\n"
02212 "WWW-Authenticate: Digest qop=\"auth\", "
02213 "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
02214 conn->ctx->config[AUTHENTICATION_DOMAIN],
02215 (unsigned long) time(NULL));
02216 }
02217
02218 static int is_authorized_for_put(struct mg_connection *conn) {
02219 FILE *fp;
02220 int ret = 0;
02221
02222 fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
02223 mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
02224
02225 if (fp != NULL) {
02226 ret = authorize(conn, fp);
02227 (void) fclose(fp);
02228 }
02229
02230 return ret;
02231 }
02232
02233 int mg_modify_passwords_file(struct mg_context *ctx, const char *fname,
02234 const char *user, const char *pass) {
02235 int found;
02236 char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
02237 const char *domain;
02238 FILE *fp, *fp2;
02239
02240 found = 0;
02241 fp = fp2 = NULL;
02242 domain = ctx->config[AUTHENTICATION_DOMAIN];
02243
02244
02245 if (pass[0] == '\0') {
02246 pass = NULL;
02247 }
02248
02249 (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
02250
02251
02252 if ((fp = mg_fopen(fname, "a+")) != NULL) {
02253 (void) fclose(fp);
02254 }
02255
02256
02257 if ((fp = mg_fopen(fname, "r")) == NULL) {
02258 cry(fc(ctx), "Cannot open %s: %s", fname, strerror(errno));
02259 return 0;
02260 } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
02261 cry(fc(ctx), "Cannot open %s: %s", tmp, strerror(errno));
02262 return 0;
02263 }
02264
02265
02266 while (fgets(line, sizeof(line), fp) != NULL) {
02267 if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
02268 continue;
02269 }
02270
02271 if (!strcmp(u, user) && !strcmp(d, domain)) {
02272 found++;
02273 if (pass != NULL) {
02274 mg_md5(ha1, user, ":", domain, ":", pass, NULL);
02275 fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
02276 }
02277 } else {
02278 (void) fprintf(fp2, "%s", line);
02279 }
02280 }
02281
02282
02283 if (!found && pass != NULL) {
02284 mg_md5(ha1, user, ":", domain, ":", pass, NULL);
02285 (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
02286 }
02287
02288
02289 (void) fclose(fp);
02290 (void) fclose(fp2);
02291
02292
02293 (void) mg_remove(fname);
02294 (void) mg_rename(tmp, fname);
02295
02296 return 1;
02297 }
02298
02299 struct de {
02300 struct mg_connection *conn;
02301 char *file_name;
02302 struct mgstat st;
02303 };
02304
02305 static void url_encode(const char *src, char *dst, size_t dst_len) {
02306 static const char *dont_escape = "._-$,;~()";
02307 static const char *hex = "0123456789abcdef";
02308 const char *end = dst + dst_len - 1;
02309
02310 for (; *src != '\0' && dst < end; src++, dst++) {
02311 if (isalnum(*(const unsigned char *) src) ||
02312 strchr(dont_escape, * (const unsigned char *) src) != NULL) {
02313 *dst = *src;
02314 } else if (dst + 2 < end) {
02315 dst[0] = '%';
02316 dst[1] = hex[(* (const unsigned char *) src) >> 4];
02317 dst[2] = hex[(* (const unsigned char *) src) & 0xf];
02318 dst += 2;
02319 }
02320 }
02321
02322 *dst = '\0';
02323 }
02324
02325 static void print_dir_entry(struct de *de) {
02326 char size[64], mod[64], href[PATH_MAX];
02327
02328 if (de->st.is_directory) {
02329 (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
02330 } else {
02331
02332
02333 if (de->st.size < 1024) {
02334 (void) mg_snprintf(de->conn, size, sizeof(size),
02335 "%lu", (unsigned long) de->st.size);
02336 } else if (de->st.size < 1024 * 1024) {
02337 (void) mg_snprintf(de->conn, size, sizeof(size),
02338 "%.1fk", (double) de->st.size / 1024.0);
02339 } else if (de->st.size < 1024 * 1024 * 1024) {
02340 (void) mg_snprintf(de->conn, size, sizeof(size),
02341 "%.1fM", (double) de->st.size / 1048576);
02342 } else {
02343 (void) mg_snprintf(de->conn, size, sizeof(size),
02344 "%.1fG", (double) de->st.size / 1073741824);
02345 }
02346 }
02347 (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
02348 url_encode(de->file_name, href, sizeof(href));
02349 de->conn->num_bytes_sent += mg_printf(de->conn,
02350 "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
02351 "<td> %s</td><td> %s</td></tr>\n",
02352 de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
02353 de->file_name, de->st.is_directory ? "/" : "", mod, size);
02354 }
02355
02356
02357
02358
02359
02360 static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
02361 const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
02362 const char *query_string = a->conn->request_info.query_string;
02363 int cmp_result = 0;
02364
02365 if (query_string == NULL) {
02366 query_string = "na";
02367 }
02368
02369 if (a->st.is_directory && !b->st.is_directory) {
02370 return -1;
02371 } else if (!a->st.is_directory && b->st.is_directory) {
02372 return 1;
02373 } else if (*query_string == 'n') {
02374 cmp_result = strcmp(a->file_name, b->file_name);
02375 } else if (*query_string == 's') {
02376 cmp_result = a->st.size == b->st.size ? 0 :
02377 a->st.size > b->st.size ? 1 : -1;
02378 } else if (*query_string == 'd') {
02379 cmp_result = a->st.mtime == b->st.mtime ? 0 :
02380 a->st.mtime > b->st.mtime ? 1 : -1;
02381 }
02382
02383 return query_string[1] == 'd' ? -cmp_result : cmp_result;
02384 }
02385
02386 static void handle_directory_request(struct mg_connection *conn,
02387 const char *dir) {
02388 struct dirent *dp;
02389 DIR *dirp;
02390 struct de *entries = NULL;
02391 char path[PATH_MAX];
02392 int i, sort_direction, num_entries = 0, arr_size = 128;
02393
02394 if ((dirp = opendir(dir)) == NULL) {
02395 send_http_error(conn, 500, "Cannot open directory",
02396 "Error: opendir(%s): %s", path, strerror(ERRNO));
02397 return;
02398 }
02399
02400 (void) mg_printf(conn, "%s",
02401 "HTTP/1.1 200 OK\r\n"
02402 "Connection: close\r\n"
02403 "Content-Type: text/html; charset=utf-8\r\n\r\n");
02404
02405 sort_direction = conn->request_info.query_string != NULL &&
02406 conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
02407
02408 while ((dp = readdir(dirp)) != NULL) {
02409
02410
02411 if (!strcmp(dp->d_name, ".") ||
02412 !strcmp(dp->d_name, "..") ||
02413 !strcmp(dp->d_name, PASSWORDS_FILE_NAME))
02414 continue;
02415
02416 if (entries == NULL || num_entries >= arr_size) {
02417 arr_size *= 2;
02418 entries = (struct de *) realloc(entries,
02419 arr_size * sizeof(entries[0]));
02420 }
02421
02422 if (entries == NULL) {
02423 send_http_error(conn, 500, "Cannot open directory",
02424 "%s", "Error: cannot allocate memory");
02425 return;
02426 }
02427
02428 mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, DIRSEP, dp->d_name);
02429
02430
02431
02432
02433
02434
02435 if (mg_stat(path, &entries[num_entries].st) != 0) {
02436 memset(&entries[num_entries].st, 0, sizeof(entries[num_entries].st));
02437 }
02438
02439 entries[num_entries].conn = conn;
02440 entries[num_entries].file_name = mg_strdup(dp->d_name);
02441 num_entries++;
02442 }
02443 (void) closedir(dirp);
02444
02445 conn->num_bytes_sent += mg_printf(conn,
02446 "<html><head><title>Index of %s</title>"
02447 "<style>th {text-align: left;}</style></head>"
02448 "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
02449 "<tr><th><a href=\"?n%c\">Name</a></th>"
02450 "<th><a href=\"?d%c\">Modified</a></th>"
02451 "<th><a href=\"?s%c\">Size</a></th></tr>"
02452 "<tr><td colspan=\"3\"><hr></td></tr>",
02453 conn->request_info.uri, conn->request_info.uri,
02454 sort_direction, sort_direction, sort_direction);
02455
02456
02457 conn->num_bytes_sent += mg_printf(conn,
02458 "<tr><td><a href=\"%s%s\">%s</a></td>"
02459 "<td> %s</td><td> %s</td></tr>\n",
02460 conn->request_info.uri, "..", "Parent directory", "-", "-");
02461
02462
02463 qsort(entries, (size_t)num_entries, sizeof(entries[0]), compare_dir_entries);
02464 for (i = 0; i < num_entries; i++) {
02465 print_dir_entry(&entries[i]);
02466 free(entries[i].file_name);
02467 }
02468 free(entries);
02469
02470 conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
02471 conn->request_info.status_code = 200;
02472 }
02473
02474
02475 static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
02476 char buf[BUFSIZ];
02477 int to_read, num_read, num_written;
02478
02479 while (len > 0) {
02480
02481 to_read = sizeof(buf);
02482 if ((int64_t) to_read > len)
02483 to_read = (int) len;
02484
02485
02486 if ((num_read = fread(buf, 1, (size_t)to_read, fp)) == 0)
02487 break;
02488
02489
02490 if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read)
02491 break;
02492
02493
02494 conn->num_bytes_sent += num_written;
02495 len -= num_written;
02496 }
02497 }
02498
02499 static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
02500 return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
02501 }
02502
02503 static void handle_file_request(struct mg_connection *conn, const char *path,
02504 struct mgstat *stp) {
02505 char date[64], lm[64], etag[64], range[64];
02506 const char *fmt = "%a, %d %b %Y %H:%M:%S %Z", *msg = "OK", *hdr;
02507 time_t curtime = time(NULL);
02508 int64_t cl, r1, r2;
02509 struct vec mime_vec;
02510 FILE *fp;
02511 int n;
02512
02513 get_mime_type(conn->ctx, path, &mime_vec);
02514 cl = stp->size;
02515 conn->request_info.status_code = 200;
02516 range[0] = '\0';
02517
02518 if ((fp = mg_fopen(path, "rb")) == NULL) {
02519 send_http_error(conn, 500, http_500_error,
02520 "fopen(%s): %s", path, strerror(ERRNO));
02521 return;
02522 }
02523 set_close_on_exec(fileno(fp));
02524
02525
02526 r1 = r2 = 0;
02527 hdr = mg_get_header(conn, "Range");
02528 if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
02529 conn->request_info.status_code = 206;
02530 (void) fseeko(fp, (off_t) r1, SEEK_SET);
02531 cl = n == 2 ? r2 - r1 + 1: cl - r1;
02532 (void) mg_snprintf(conn, range, sizeof(range),
02533 "Content-Range: bytes "
02534 "%" INT64_FMT "-%"
02535 INT64_FMT "/%" INT64_FMT "\r\n",
02536 r1, r1 + cl - 1, stp->size);
02537 msg = "Partial Content";
02538 }
02539
02540
02541 (void) strftime(date, sizeof(date), fmt, localtime(&curtime));
02542 (void) strftime(lm, sizeof(lm), fmt, localtime(&stp->mtime));
02543 (void) mg_snprintf(conn, etag, sizeof(etag), "%lx.%lx",
02544 (unsigned long) stp->mtime, (unsigned long) stp->size);
02545
02546 (void) mg_printf(conn,
02547 "HTTP/1.1 %d %s\r\n"
02548 "Date: %s\r\n"
02549 "Last-Modified: %s\r\n"
02550 "Etag: \"%s\"\r\n"
02551 "Content-Type: %.*s\r\n"
02552 "Content-Length: %" INT64_FMT "\r\n"
02553 "Connection: %s\r\n"
02554 "Accept-Ranges: bytes\r\n"
02555 "%s\r\n",
02556 conn->request_info.status_code, msg, date, lm, etag,
02557 mime_vec.len, mime_vec.ptr, cl, suggest_connection_header(conn), range);
02558
02559 if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
02560 send_file_data(conn, fp, cl);
02561 }
02562 (void) fclose(fp);
02563 }
02564
02565
02566
02567 static void parse_http_headers(char **buf, struct mg_request_info *ri) {
02568 int i;
02569
02570 for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
02571 ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
02572 ri->http_headers[i].value = skip(buf, "\r\n");
02573 if (ri->http_headers[i].name[0] == '\0')
02574 break;
02575 ri->num_headers = i + 1;
02576 }
02577 }
02578
02579 static int is_valid_http_method(const char *method) {
02580 return !strcmp(method, "GET") || !strcmp(method, "POST") ||
02581 !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
02582 !strcmp(method, "PUT") || !strcmp(method, "DELETE");
02583 }
02584
02585
02586 static int parse_http_request(char *buf, struct mg_request_info *ri) {
02587 int status = 0;
02588
02589
02590 while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
02591 buf++;
02592 }
02593
02594 ri->request_method = skip(&buf, " ");
02595 ri->uri = skip(&buf, " ");
02596 ri->http_version = skip(&buf, "\r\n");
02597
02598 if (is_valid_http_method(ri->request_method) &&
02599 strncmp(ri->http_version, "HTTP/", 5) == 0) {
02600 ri->http_version += 5;
02601 parse_http_headers(&buf, ri);
02602 status = 1;
02603 }
02604
02605 return status;
02606 }
02607
02608
02609
02610
02611
02612
02613 static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
02614 int *nread) {
02615 int n, request_len;
02616
02617 request_len = 0;
02618 while (*nread < bufsiz && request_len == 0) {
02619 n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread);
02620 if (n <= 0) {
02621 break;
02622 } else {
02623 *nread += n;
02624 request_len = get_request_len(buf, *nread);
02625 }
02626 }
02627
02628 return request_len;
02629 }
02630
02631
02632
02633
02634 static int substitute_index_file(struct mg_connection *conn, char *path,
02635 size_t path_len, struct mgstat *stp) {
02636 const char *list = conn->ctx->config[INDEX_FILES];
02637 struct mgstat st;
02638 struct vec filename_vec;
02639 size_t n = strlen(path);
02640 int found = 0;
02641
02642
02643
02644
02645 while (n > 0 && IS_DIRSEP_CHAR(path[n - 1])) {
02646 n--;
02647 }
02648 path[n] = DIRSEP;
02649
02650
02651
02652 while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
02653
02654
02655 if (filename_vec.len > path_len - n)
02656 continue;
02657
02658
02659 (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
02660
02661
02662 if (mg_stat(path, &st) == 0) {
02663
02664 *stp = st;
02665 found = 1;
02666 break;
02667 }
02668 }
02669
02670
02671 if (!found) {
02672 path[n] = '\0';
02673 }
02674
02675 return found;
02676 }
02677
02678
02679 static int is_not_modified(const struct mg_connection *conn,
02680 const struct mgstat *stp) {
02681 const char *ims = mg_get_header(conn, "If-Modified-Since");
02682 return ims != NULL && stp->mtime <= parse_date_string(ims);
02683 }
02684
02685 static int forward_body_data(struct mg_connection *conn, FILE *fp,
02686 SOCKET sock, SSL *ssl) {
02687 const char *expect, *buffered;
02688 char buf[BUFSIZ];
02689 int to_read, nread, buffered_len, success = 0;
02690
02691 expect = mg_get_header(conn, "Expect");
02692 assert(fp != NULL);
02693
02694 if (conn->content_len == -1) {
02695 send_http_error(conn, 411, "Length Required", "");
02696 } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
02697 send_http_error(conn, 417, "Expectation Failed", "");
02698 } else {
02699 if (expect != NULL) {
02700 (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
02701 }
02702
02703 buffered = conn->buf + conn->request_len;
02704 buffered_len = conn->data_len - conn->request_len;
02705 assert(buffered_len >= 0);
02706 assert(conn->consumed_content == 0);
02707
02708 if (buffered_len > 0) {
02709 if ((int64_t) buffered_len > conn->content_len) {
02710 buffered_len = (int) conn->content_len;
02711 }
02712 push(fp, sock, ssl, buffered, (int64_t) buffered_len);
02713 conn->consumed_content += buffered_len;
02714 }
02715
02716 while (conn->consumed_content < conn->content_len) {
02717 to_read = sizeof(buf);
02718 if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
02719 to_read = (int) (conn->content_len - conn->consumed_content);
02720 }
02721 nread = pull(NULL, conn->client.sock, conn->ssl, buf, to_read);
02722 if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
02723 break;
02724 }
02725 conn->consumed_content += nread;
02726 }
02727
02728 if (conn->consumed_content == conn->content_len) {
02729 success = 1;
02730 }
02731
02732
02733 if (!success) {
02734 send_http_error(conn, 577, http_500_error, "");
02735 }
02736 }
02737
02738 return success;
02739 }
02740
02741 #if !defined(NO_CGI)
02742
02743
02744
02745
02746
02747
02748
02749
02750 struct cgi_env_block {
02751 struct mg_connection *conn;
02752 char buf[CGI_ENVIRONMENT_SIZE];
02753 int len;
02754 char *vars[MAX_CGI_ENVIR_VARS];
02755 int nvars;
02756 };
02757
02758
02759
02760 static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
02761 int n, space;
02762 char *added;
02763 va_list ap;
02764
02765
02766 space = sizeof(block->buf) - block->len - 2;
02767 assert(space >= 0);
02768
02769
02770 added = block->buf + block->len;
02771
02772
02773 va_start(ap, fmt);
02774 n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
02775 va_end(ap);
02776
02777
02778 if (n > 0 && n < space &&
02779 block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
02780
02781 block->vars[block->nvars++] = block->buf + block->len;
02782
02783 block->len += n + 1;
02784 }
02785
02786 return added;
02787 }
02788
02789 static void prepare_cgi_environment(struct mg_connection *conn,
02790 const char *prog,
02791 struct cgi_env_block *blk) {
02792 const char *s, *slash;
02793 struct vec var_vec, root;
02794 char *p;
02795 int i;
02796
02797 blk->len = blk->nvars = 0;
02798 blk->conn = conn;
02799
02800 get_document_root(conn, &root);
02801
02802 addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
02803 addenv(blk, "SERVER_ROOT=%.*s", root.len, root.ptr);
02804 addenv(blk, "DOCUMENT_ROOT=%.*s", root.len, root.ptr);
02805
02806
02807 addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
02808 addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
02809 addenv(blk, "%s", "REDIRECT_STATUS=200");
02810 addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.u.sin.sin_port));
02811 addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
02812 addenv(blk, "REMOTE_ADDR=%s",
02813 inet_ntoa(conn->client.rsa.u.sin.sin_addr));
02814 addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
02815 addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
02816
02817
02818 assert(conn->request_info.uri[0] == '/');
02819 slash = strrchr(conn->request_info.uri, '/');
02820 if ((s = strrchr(prog, '/')) == NULL)
02821 s = prog;
02822 addenv(blk, "SCRIPT_NAME=%.*s%s", slash - conn->request_info.uri,
02823 conn->request_info.uri, s);
02824
02825 addenv(blk, "SCRIPT_FILENAME=%s", prog);
02826 addenv(blk, "PATH_TRANSLATED=%s", prog);
02827 addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
02828
02829 if ((s = mg_get_header(conn, "Content-Type")) != NULL)
02830 addenv(blk, "CONTENT_TYPE=%s", s);
02831
02832 if (conn->request_info.query_string != NULL)
02833 addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
02834
02835 if ((s = mg_get_header(conn, "Content-Length")) != NULL)
02836 addenv(blk, "CONTENT_LENGTH=%s", s);
02837
02838 if ((s = getenv("PATH")) != NULL)
02839 addenv(blk, "PATH=%s", s);
02840
02841 #if defined(_WIN32)
02842 if ((s = getenv("COMSPEC")) != NULL)
02843 addenv(blk, "COMSPEC=%s", s);
02844 if ((s = getenv("SYSTEMROOT")) != NULL)
02845 addenv(blk, "SYSTEMROOT=%s", s);
02846 #else
02847 if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
02848 addenv(blk, "LD_LIBRARY_PATH=%s", s);
02849 #endif
02850
02851 if ((s = getenv("PERLLIB")) != NULL)
02852 addenv(blk, "PERLLIB=%s", s);
02853
02854 if (conn->request_info.remote_user != NULL) {
02855 addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
02856 addenv(blk, "%s", "AUTH_TYPE=Digest");
02857 }
02858
02859
02860 for (i = 0; i < conn->request_info.num_headers; i++) {
02861 p = addenv(blk, "HTTP_%s=%s",
02862 conn->request_info.http_headers[i].name,
02863 conn->request_info.http_headers[i].value);
02864
02865
02866 for (; *p != '=' && *p != '\0'; p++) {
02867 if (*p == '-')
02868 *p = '_';
02869 *p = (char) toupper(* (unsigned char *) p);
02870 }
02871 }
02872
02873
02874 s = conn->ctx->config[CGI_ENVIRONMENT];
02875 while ((s = next_option(s, &var_vec, NULL)) != NULL) {
02876 addenv(blk, "%.*s", var_vec.len, var_vec.ptr);
02877 }
02878
02879 blk->vars[blk->nvars++] = NULL;
02880 blk->buf[blk->len++] = '\0';
02881
02882 assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
02883 assert(blk->len > 0);
02884 assert(blk->len < (int) sizeof(blk->buf));
02885 }
02886
02887 static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
02888 int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
02889 const char *status;
02890 char buf[BUFSIZ], *pbuf, dir[PATH_MAX], *p;
02891 struct mg_request_info ri;
02892 struct cgi_env_block blk;
02893 FILE *in, *out;
02894 pid_t pid;
02895
02896 prepare_cgi_environment(conn, prog, &blk);
02897
02898
02899
02900
02901 (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
02902 if ((p = strrchr(dir, DIRSEP)) != NULL) {
02903 *p++ = '\0';
02904 } else {
02905 dir[0] = '.', dir[1] = '\0';
02906 p = (char *) prog;
02907 }
02908
02909 pid = (pid_t) -1;
02910 fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
02911 in = out = NULL;
02912
02913 if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
02914 send_http_error(conn, 500, http_500_error,
02915 "Cannot create CGI pipe: %s", strerror(ERRNO));
02916 goto done;
02917 } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
02918 fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
02919 goto done;
02920 } else if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
02921 (out = fdopen(fd_stdout[0], "rb")) == NULL) {
02922 send_http_error(conn, 500, http_500_error,
02923 "fopen: %s", strerror(ERRNO));
02924 goto done;
02925 }
02926
02927 setbuf(in, NULL);
02928 setbuf(out, NULL);
02929
02930
02931
02932
02933
02934 fd_stdin[0] = fd_stdout[1] = -1;
02935
02936
02937 if (!strcmp(conn->request_info.request_method, "POST") &&
02938 !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
02939 goto done;
02940 }
02941
02942
02943
02944
02945
02946 data_len = 0;
02947 headers_len = read_request(out, INVALID_SOCKET, NULL,
02948 buf, sizeof(buf), &data_len);
02949 if (headers_len <= 0) {
02950 send_http_error(conn, 500, http_500_error,
02951 "CGI program sent malformed HTTP headers: [%.*s]",
02952 data_len, buf);
02953 goto done;
02954 }
02955 pbuf = buf;
02956 buf[headers_len - 1] = '\0';
02957 parse_http_headers(&pbuf, &ri);
02958
02959
02960 status = get_header(&ri, "Status");
02961 conn->request_info.status_code = status == NULL ? 200 : atoi(status);
02962 (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n", conn->request_info.status_code);
02963
02964
02965 for (i = 0; i < ri.num_headers; i++) {
02966 mg_printf(conn, "%s: %s\r\n",
02967 ri.http_headers[i].name, ri.http_headers[i].value);
02968 }
02969 (void) mg_write(conn, "\r\n", 2);
02970
02971
02972 conn->num_bytes_sent += mg_write(conn, buf + headers_len,
02973 (size_t)(data_len - headers_len));
02974
02975
02976 send_file_data(conn, out, INT64_MAX);
02977
02978 done:
02979 if (pid != (pid_t) -1) {
02980 kill(pid, SIGKILL);
02981 #if !defined(_WIN32)
02982 do {} while (waitpid(-1, &i, WNOHANG) > 0);
02983 #endif
02984 }
02985 if (fd_stdin[0] != -1) {
02986 (void) close(fd_stdin[0]);
02987 }
02988 if (fd_stdout[1] != -1) {
02989 (void) close(fd_stdout[1]);
02990 }
02991
02992 if (in != NULL) {
02993 (void) fclose(in);
02994 } else if (fd_stdin[1] != -1) {
02995 (void) close(fd_stdin[1]);
02996 }
02997
02998 if (out != NULL) {
02999 (void) fclose(out);
03000 } else if (fd_stdout[0] != -1) {
03001 (void) close(fd_stdout[0]);
03002 }
03003 }
03004 #endif // !NO_CGI
03005
03006
03007
03008
03009 static int put_dir(const char *path) {
03010 char buf[PATH_MAX];
03011 const char *s, *p;
03012 struct mgstat st;
03013 size_t len;
03014
03015 for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
03016 len = p - path;
03017 assert(len < sizeof(buf));
03018 (void) memcpy(buf, path, len);
03019 buf[len] = '\0';
03020
03021
03022 if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
03023 return -1;
03024 }
03025
03026
03027 if (p[1] == '\0') {
03028 return 0;
03029 }
03030 }
03031
03032 return 1;
03033 }
03034
03035 static void put_file(struct mg_connection *conn, const char *path) {
03036 struct mgstat st;
03037 const char *range;
03038 int64_t r1, r2;
03039 FILE *fp;
03040 int rc;
03041
03042 conn->request_info.status_code = mg_stat(path, &st) == 0 ? 200 : 201;
03043
03044 if ((rc = put_dir(path)) == 0) {
03045 mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->request_info.status_code);
03046 } else if (rc == -1) {
03047 send_http_error(conn, 500, http_500_error,
03048 "put_dir(%s): %s", path, strerror(ERRNO));
03049 } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
03050 send_http_error(conn, 500, http_500_error,
03051 "fopen(%s): %s", path, strerror(ERRNO));
03052 } else {
03053 set_close_on_exec(fileno(fp));
03054 range = mg_get_header(conn, "Content-Range");
03055 r1 = r2 = 0;
03056 if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
03057 conn->request_info.status_code = 206;
03058
03059 (void) fseeko(fp, (off_t) r1, SEEK_SET);
03060 }
03061 if (forward_body_data(conn, fp, INVALID_SOCKET, NULL))
03062 (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n",
03063 conn->request_info.status_code);
03064 (void) fclose(fp);
03065 }
03066 }
03067
03068 static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
03069
03070 static void do_ssi_include(struct mg_connection *conn, const char *ssi,
03071 char *tag, int include_level) {
03072 char file_name[BUFSIZ], path[PATH_MAX], *p;
03073 struct vec root;
03074 int is_ssi;
03075 FILE *fp;
03076
03077 get_document_root(conn, &root);
03078
03079
03080
03081 if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
03082
03083 (void) mg_snprintf(conn, path, sizeof(path), "%.*s%c%s",
03084 root.len, root.ptr, DIRSEP, file_name);
03085 } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
03086
03087
03088 (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
03089 } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
03090
03091 (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
03092 if ((p = strrchr(path, DIRSEP)) != NULL) {
03093 p[1] = '\0';
03094 }
03095 (void) mg_snprintf(conn, path + strlen(path),
03096 sizeof(path) - strlen(path), "%s", file_name);
03097 } else {
03098 cry(conn, "Bad SSI #include: [%s]", tag);
03099 return;
03100 }
03101
03102 if ((fp = mg_fopen(path, "rb")) == NULL) {
03103 cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
03104 tag, path, strerror(ERRNO));
03105 } else {
03106 set_close_on_exec(fileno(fp));
03107 is_ssi = match_extension(path, conn->ctx->config[SSI_EXTENSIONS]);
03108 if (is_ssi) {
03109 send_ssi_file(conn, path, fp, include_level + 1);
03110 } else {
03111 send_file_data(conn, fp, INT64_MAX);
03112 }
03113 (void) fclose(fp);
03114 }
03115 }
03116
03117 #if !defined(NO_POPEN)
03118 static void do_ssi_exec(struct mg_connection *conn, char *tag) {
03119 char cmd[BUFSIZ];
03120 FILE *fp;
03121
03122 if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
03123 cry(conn, "Bad SSI #exec: [%s]", tag);
03124 } else if ((fp = popen(cmd, "r")) == NULL) {
03125 cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
03126 } else {
03127 send_file_data(conn, fp, INT64_MAX);
03128 (void) pclose(fp);
03129 }
03130 }
03131 #endif // !NO_POPEN
03132
03133 static void send_ssi_file(struct mg_connection *conn, const char *path,
03134 FILE *fp, int include_level) {
03135 char buf[BUFSIZ];
03136 int ch, len, in_ssi_tag;
03137
03138 if (include_level > 10) {
03139 cry(conn, "SSI #include level is too deep (%s)", path);
03140 return;
03141 }
03142
03143 in_ssi_tag = 0;
03144 len = 0;
03145
03146 while ((ch = fgetc(fp)) != EOF) {
03147 if (in_ssi_tag && ch == '>') {
03148 in_ssi_tag = 0;
03149 buf[len++] = (char) ch;
03150 buf[len] = '\0';
03151 assert(len <= (int) sizeof(buf));
03152 if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
03153
03154 (void) mg_write(conn, buf, (size_t)len);
03155 } else {
03156 if (!memcmp(buf + 5, "include", 7)) {
03157 do_ssi_include(conn, path, buf + 12, include_level);
03158 #if !defined(NO_POPEN)
03159 } else if (!memcmp(buf + 5, "exec", 4)) {
03160 do_ssi_exec(conn, buf + 9);
03161 #endif // !NO_POPEN
03162 } else {
03163 cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
03164 }
03165 }
03166 len = 0;
03167 } else if (in_ssi_tag) {
03168 if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
03169
03170 in_ssi_tag = 0;
03171 } else if (len == (int) sizeof(buf) - 2) {
03172 cry(conn, "%s: SSI tag is too large", path);
03173 len = 0;
03174 }
03175 buf[len++] = ch & 0xff;
03176 } else if (ch == '<') {
03177 in_ssi_tag = 1;
03178 if (len > 0) {
03179 (void) mg_write(conn, buf, (size_t)len);
03180 }
03181 len = 0;
03182 buf[len++] = ch & 0xff;
03183 } else {
03184 buf[len++] = ch & 0xff;
03185 if (len == (int) sizeof(buf)) {
03186 (void) mg_write(conn, buf, (size_t)len);
03187 len = 0;
03188 }
03189 }
03190 }
03191
03192
03193 if (len > 0) {
03194 (void) mg_write(conn, buf, (size_t)len);
03195 }
03196 }
03197
03198 static void handle_ssi_file_request(struct mg_connection *conn,
03199 const char *path) {
03200 FILE *fp;
03201
03202 if ((fp = mg_fopen(path, "rb")) == NULL) {
03203 send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
03204 strerror(ERRNO));
03205 } else {
03206 set_close_on_exec(fileno(fp));
03207 mg_printf(conn, "HTTP/1.1 200 OK\r\n"
03208 "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
03209 suggest_connection_header(conn));
03210 send_ssi_file(conn, path, fp, 0);
03211 (void) fclose(fp);
03212 }
03213 }
03214
03215
03216
03217
03218
03219 static void handle_request(struct mg_connection *conn) {
03220 struct mg_request_info *ri = &conn->request_info;
03221 char path[PATH_MAX];
03222 int uri_len;
03223 struct mgstat st;
03224
03225 if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
03226 * conn->request_info.query_string++ = '\0';
03227 }
03228 uri_len = strlen(ri->uri);
03229 (void) url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
03230 remove_double_dots_and_double_slashes(ri->uri);
03231 convert_uri_to_file_name(conn, ri->uri, path, sizeof(path));
03232
03233 DEBUG_TRACE(("%s", ri->uri));
03234 if (!check_authorization(conn, path)) {
03235 send_authorization_request(conn);
03236 } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
03237
03238 } else if (strstr(path, PASSWORDS_FILE_NAME)) {
03239
03240 send_http_error(conn, 403, "Forbidden", "Access Forbidden");
03241 } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
03242 send_http_error(conn, 404, "Not Found", "Not Found");
03243 } else if ((!strcmp(ri->request_method, "PUT") ||
03244 !strcmp(ri->request_method, "DELETE")) &&
03245 (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
03246 !is_authorized_for_put(conn))) {
03247 send_authorization_request(conn);
03248 } else if (!strcmp(ri->request_method, "PUT")) {
03249 put_file(conn, path);
03250 } else if (!strcmp(ri->request_method, "DELETE")) {
03251 if (mg_remove(path) == 0) {
03252 send_http_error(conn, 200, "OK", "");
03253 } else {
03254 send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
03255 strerror(ERRNO));
03256 }
03257 } else if (mg_stat(path, &st) != 0) {
03258 send_http_error(conn, 404, "Not Found", "%s", "File not found");
03259 } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
03260 (void) mg_printf(conn,
03261 "HTTP/1.1 301 Moved Permanently\r\n"
03262 "Location: %s/\r\n\r\n", ri->uri);
03263 } else if (st.is_directory &&
03264 !substitute_index_file(conn, path, sizeof(path), &st)) {
03265 if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
03266 handle_directory_request(conn, path);
03267 } else {
03268 send_http_error(conn, 403, "Directory Listing Denied",
03269 "Directory listing denied");
03270 }
03271 } else if (match_extension(path, conn->ctx->config[CGI_EXTENSIONS])) {
03272 if (strcmp(ri->request_method, "POST") &&
03273 strcmp(ri->request_method, "GET")) {
03274 send_http_error(conn, 501, "Not Implemented",
03275 "Method %s is not implemented", ri->request_method);
03276 } else {
03277 handle_cgi_request(conn, path);
03278 }
03279 } else if (match_extension(path, conn->ctx->config[SSI_EXTENSIONS])) {
03280 handle_ssi_file_request(conn, path);
03281 } else if (is_not_modified(conn, &st)) {
03282 send_http_error(conn, 304, "Not Modified", "");
03283 } else {
03284 handle_file_request(conn, path, &st);
03285 }
03286 }
03287
03288 static void close_all_listening_sockets(struct mg_context *ctx) {
03289 struct socket *sp, *tmp;
03290 for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
03291 tmp = sp->next;
03292 (void) closesocket(sp->sock);
03293 free(sp);
03294 }
03295 }
03296
03297
03298
03299 static int parse_port_string(const struct vec *vec, struct socket *so) {
03300 struct usa *usa = &so->lsa;
03301 int a, b, c, d, port, len;
03302
03303
03304 memset(so, 0, sizeof(*so));
03305
03306 if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
03307
03308 usa->u.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
03309 } else if (sscanf(vec->ptr, "%d%n", &port, &len) == 1) {
03310
03311 usa->u.sin.sin_addr.s_addr = htonl(INADDR_ANY);
03312 } else {
03313 return 0;
03314 }
03315 assert(len > 0 && len <= (int) vec->len);
03316
03317 if (strchr("sp,", vec->ptr[len]) == NULL) {
03318 return 0;
03319 }
03320
03321 so->is_ssl = vec->ptr[len] == 's';
03322 so->is_proxy = vec->ptr[len] == 'p';
03323 usa->len = sizeof(usa->u.sin);
03324 usa->u.sin.sin_family = AF_INET;
03325 usa->u.sin.sin_port = htons((uint16_t) port);
03326
03327 return 1;
03328 }
03329
03330 static int set_ports_option(struct mg_context *ctx) {
03331 const char *list = ctx->config[LISTENING_PORTS];
03332 int reuseaddr = 1, success = 1;
03333 SOCKET sock;
03334 struct vec vec;
03335 struct socket so, *listener;
03336
03337 while (success && (list = next_option(list, &vec, NULL)) != NULL) {
03338 if (!parse_port_string(&vec, &so)) {
03339 cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
03340 __func__, vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
03341 success = 0;
03342 } else if (so.is_ssl && ctx->ssl_ctx == NULL) {
03343 cry(fc(ctx), "Cannot add SSL socket, is -ssl_cert option set?");
03344 success = 0;
03345 } else if ((sock = socket(PF_INET, SOCK_STREAM, 6)) == INVALID_SOCKET ||
03346 #if !defined(_WIN32)
03347
03348
03349 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
03350 sizeof(reuseaddr)) != 0 ||
03351 #endif
03352 bind(sock, &so.lsa.u.sa, so.lsa.len) != 0 ||
03353 listen(sock, 20) != 0) {
03354 closesocket(sock);
03355 cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
03356 vec.len, vec.ptr, strerror(ERRNO));
03357 success = 0;
03358 } else if ((listener = calloc(1, sizeof(*listener))) == NULL) {
03359 closesocket(sock);
03360 cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
03361 success = 0;
03362 } else {
03363 *listener = so;
03364 listener->sock = sock;
03365 set_close_on_exec(listener->sock);
03366 listener->next = ctx->listening_sockets;
03367 ctx->listening_sockets = listener;
03368 }
03369 }
03370
03371 if (!success) {
03372 close_all_listening_sockets(ctx);
03373 }
03374
03375 return success;
03376 }
03377
03378 static void log_header(const struct mg_connection *conn, const char *header,
03379 FILE *fp) {
03380 const char *header_value;
03381
03382 if ((header_value = mg_get_header(conn, header)) == NULL) {
03383 (void) fprintf(fp, "%s", " -");
03384 } else {
03385 (void) fprintf(fp, " \"%s\"", header_value);
03386 }
03387 }
03388
03389 static void log_access(const struct mg_connection *conn) {
03390 const struct mg_request_info *ri;
03391 FILE *fp;
03392 char date[64];
03393
03394 fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
03395 mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
03396
03397 if (fp == NULL)
03398 return;
03399
03400 (void) strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
03401 localtime(&conn->birth_time));
03402
03403 ri = &conn->request_info;
03404
03405 flockfile(fp);
03406
03407 (void) fprintf(fp,
03408 "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
03409 inet_ntoa(conn->client.rsa.u.sin.sin_addr),
03410 ri->remote_user == NULL ? "-" : ri->remote_user,
03411 date,
03412 ri->request_method ? ri->request_method : "-",
03413 ri->uri ? ri->uri : "-",
03414 ri->http_version,
03415 conn->request_info.status_code, conn->num_bytes_sent);
03416 log_header(conn, "Referer", fp);
03417 log_header(conn, "User-Agent", fp);
03418 (void) fputc('\n', fp);
03419 (void) fflush(fp);
03420
03421 funlockfile(fp);
03422 (void) fclose(fp);
03423 }
03424
03425 static int isbyte(int n) {
03426 return n >= 0 && n <= 255;
03427 }
03428
03429
03430
03431 static int check_acl(struct mg_context *ctx, const struct usa *usa) {
03432 int a, b, c, d, n, mask, allowed;
03433 char flag;
03434 uint32_t acl_subnet, acl_mask, remote_ip;
03435 struct vec vec;
03436 const char *list = ctx->config[ACCESS_CONTROL_LIST];
03437
03438 if (list == NULL) {
03439 return 1;
03440 }
03441
03442 (void) memcpy(&remote_ip, &usa->u.sin.sin_addr, sizeof(remote_ip));
03443
03444
03445 allowed = '-';
03446
03447 while ((list = next_option(list, &vec, NULL)) != NULL) {
03448 mask = 32;
03449
03450 if (sscanf(vec.ptr, "%c%d.%d.%d.%d%n", &flag, &a, &b, &c, &d, &n) != 5) {
03451 cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
03452 return -1;
03453 } else if (flag != '+' && flag != '-') {
03454 cry(fc(ctx), "%s: flag must be + or -: [%s]", __func__, vec.ptr);
03455 return -1;
03456 } else if (!isbyte(a)||!isbyte(b)||!isbyte(c)||!isbyte(d)) {
03457 cry(fc(ctx), "%s: bad ip address: [%s]", __func__, vec.ptr);
03458 return -1;
03459 } else if (sscanf(vec.ptr + n, "/%d", &mask) == 0) {
03460
03461 } else if (mask < 0 || mask > 32) {
03462 cry(fc(ctx), "%s: bad subnet mask: %d [%s]", __func__, n, vec.ptr);
03463 return -1;
03464 }
03465
03466 acl_subnet = (a << 24) | (b << 16) | (c << 8) | d;
03467 acl_mask = mask ? 0xffffffffU << (32 - mask) : 0;
03468
03469 if (acl_subnet == (ntohl(remote_ip) & acl_mask)) {
03470 allowed = flag;
03471 }
03472 }
03473
03474 return allowed == '+';
03475 }
03476
03477 static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
03478 FD_SET(fd, set);
03479 if (fd > (SOCKET) *max_fd) {
03480 *max_fd = (int) fd;
03481 }
03482 }
03483
03484 #if !defined(_WIN32)
03485 static int set_uid_option(struct mg_context *ctx) {
03486 struct passwd *pw;
03487 const char *uid = ctx->config[RUN_AS_USER];
03488 int success = 0;
03489
03490 if (uid == NULL) {
03491 success = 1;
03492 } else {
03493 if ((pw = getpwnam(uid)) == NULL) {
03494 cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
03495 } else if (setgid(pw->pw_gid) == -1) {
03496 cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
03497 } else if (setuid(pw->pw_uid) == -1) {
03498 cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
03499 } else {
03500 success = 1;
03501 }
03502 }
03503
03504 return success;
03505 }
03506 #endif // !_WIN32
03507
03508 #if !defined(NO_SSL)
03509 static pthread_mutex_t *ssl_mutexes;
03510
03511 static void ssl_locking_callback(int mode, int mutex_num, const char *file,
03512 int line) {
03513 line = 0;
03514 file = NULL;
03515
03516 if (mode & CRYPTO_LOCK) {
03517 (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
03518 } else {
03519 (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
03520 }
03521 }
03522
03523 static unsigned long ssl_id_callback(void) {
03524 return (unsigned long) pthread_self();
03525 }
03526
03527 #if !defined(NO_SSL_DL)
03528 static int load_dll(struct mg_context *ctx, const char *dll_name,
03529 struct ssl_func *sw) {
03530 union {void *p; void (*fp)(void);} u;
03531 void *dll_handle;
03532 struct ssl_func *fp;
03533
03534 if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
03535 cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
03536 return 0;
03537 }
03538
03539 for (fp = sw; fp->name != NULL; fp++) {
03540 #ifdef _WIN32
03541
03542 u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
03543 #else
03544
03545
03546 u.p = dlsym(dll_handle, fp->name);
03547 #endif
03548 if (u.fp == NULL) {
03549 cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
03550 return 0;
03551 } else {
03552 fp->ptr = u.fp;
03553 }
03554 }
03555
03556 return 1;
03557 }
03558 #endif // NO_SSL_DL
03559
03560
03561 static int set_ssl_option(struct mg_context *ctx) {
03562 SSL_CTX *CTX;
03563 int i, size;
03564 const char *pem = ctx->config[SSL_CERTIFICATE];
03565 const char *chain = ctx->config[SSL_CHAIN_FILE];
03566
03567 if (pem == NULL) {
03568 return 1;
03569 }
03570
03571 #if !defined(NO_SSL_DL)
03572 if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
03573 !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
03574 return 0;
03575 }
03576 #endif // NO_SSL_DL
03577
03578
03579 SSL_library_init();
03580 SSL_load_error_strings();
03581
03582 if ((CTX = SSL_CTX_new(SSLv23_server_method())) == NULL) {
03583 cry(fc(ctx), "SSL_CTX_new error: %s", ssl_error());
03584 } else if (ctx->user_callback != NULL) {
03585 ctx->user_callback(MG_INIT_SSL, (struct mg_connection *) CTX, NULL);
03586 }
03587
03588 if (CTX != NULL && SSL_CTX_use_certificate_file(CTX, pem,
03589 SSL_FILETYPE_PEM) == 0) {
03590 cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
03591 return 0;
03592 } else if (CTX != NULL && SSL_CTX_use_PrivateKey_file(CTX, pem,
03593 SSL_FILETYPE_PEM) == 0) {
03594 cry(fc(ctx), "%s: cannot open %s: %s", NULL, pem, ssl_error());
03595 return 0;
03596 }
03597
03598 if (CTX != NULL && chain != NULL &&
03599 SSL_CTX_use_certificate_chain_file(CTX, chain) == 0) {
03600 cry(fc(ctx), "%s: cannot open %s: %s", NULL, chain, ssl_error());
03601 return 0;
03602 }
03603
03604
03605
03606 size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
03607 if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
03608 cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
03609 return 0;
03610 }
03611
03612 for (i = 0; i < CRYPTO_num_locks(); i++) {
03613 pthread_mutex_init(&ssl_mutexes[i], NULL);
03614 }
03615
03616 CRYPTO_set_locking_callback(&ssl_locking_callback);
03617 CRYPTO_set_id_callback(&ssl_id_callback);
03618
03619
03620 ctx->ssl_ctx = CTX;
03621
03622 return 1;
03623 }
03624 #endif // !NO_SSL
03625
03626 static int set_gpass_option(struct mg_context *ctx) {
03627 struct mgstat mgstat;
03628 const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
03629 return path == NULL || mg_stat(path, &mgstat) == 0;
03630 }
03631
03632 static int set_acl_option(struct mg_context *ctx) {
03633 struct usa fake;
03634 return check_acl(ctx, &fake) != -1;
03635 }
03636
03637 static void reset_per_request_attributes(struct mg_connection *conn) {
03638 struct mg_request_info *ri = &conn->request_info;
03639
03640
03641 if (ri->remote_user != NULL) {
03642 free((void *) ri->remote_user);
03643 }
03644 ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
03645 ri->num_headers = 0;
03646 ri->status_code = -1;
03647
03648 conn->num_bytes_sent = conn->consumed_content = 0;
03649 conn->content_len = -1;
03650 conn->request_len = conn->data_len = 0;
03651 }
03652
03653 static void close_socket_gracefully(SOCKET sock) {
03654 char buf[BUFSIZ];
03655 int n;
03656
03657
03658 (void) shutdown(sock, SHUT_WR);
03659 set_non_blocking_mode(sock);
03660
03661
03662
03663
03664
03665
03666 do {
03667 n = pull(NULL, sock, NULL, buf, sizeof(buf));
03668 } while (n > 0);
03669
03670
03671 (void) closesocket(sock);
03672 }
03673
03674 static void close_connection(struct mg_connection *conn) {
03675 if (conn->ssl) {
03676 SSL_free(conn->ssl);
03677 conn->ssl = NULL;
03678 }
03679
03680 if (conn->client.sock != INVALID_SOCKET) {
03681 close_socket_gracefully(conn->client.sock);
03682 }
03683 }
03684
03685 static void discard_current_request_from_buffer(struct mg_connection *conn) {
03686 char *buffered;
03687 int buffered_len, body_len;
03688
03689 buffered = conn->buf + conn->request_len;
03690 buffered_len = conn->data_len - conn->request_len;
03691 assert(buffered_len >= 0);
03692
03693 if (conn->content_len == -1) {
03694 body_len = 0;
03695 } else if (conn->content_len < (int64_t) buffered_len) {
03696 body_len = (int) conn->content_len;
03697 } else {
03698 body_len = buffered_len;
03699 }
03700
03701 conn->data_len -= conn->request_len + body_len;
03702 memmove(conn->buf, conn->buf + conn->request_len + body_len, (size_t)conn->data_len);
03703 }
03704
03705 static int parse_url(const char *url, char *host, int *port) {
03706 int len;
03707
03708 if (url == NULL) {
03709 return 0;
03710 };
03711
03712 if (!strncmp(url, "http://", 7)) {
03713 url += 7;
03714 }
03715
03716 if (sscanf(url, "%1024[^:]:%d/%n", host, port, &len) == 2) {
03717 } else {
03718 sscanf(url, "%1024[^/]/%n", host, &len);
03719 *port = 80;
03720 }
03721 DEBUG_TRACE(("Host:%s, port:%d", host, *port));
03722
03723 return len > 0 && url[len - 1] == '/' ? len - 1 : len;
03724 }
03725
03726 static void handle_proxy_request(struct mg_connection *conn) {
03727 struct mg_request_info *ri = &conn->request_info;
03728 char host[1025], buf[BUFSIZ];
03729 int port, is_ssl, len, i, n;
03730
03731 DEBUG_TRACE(("URL: %s", ri->uri));
03732 if (conn->request_info.uri[0] == '/' ||
03733 (len = parse_url(ri->uri, host, &port)) == 0) {
03734 return;
03735 }
03736
03737 if (conn->peer == NULL) {
03738 is_ssl = !strcmp(ri->request_method, "CONNECT");
03739 if ((conn->peer = mg_connect(conn, host, port, is_ssl)) == NULL) {
03740 return;
03741 }
03742 conn->peer->client.is_ssl = is_ssl;
03743 }
03744
03745
03746 mg_printf(conn->peer, "%s %s HTTP/%s\r\n", ri->request_method, ri->uri + len,
03747 ri->http_version);
03748
03749
03750 for (i = 0; i < ri->num_headers; i++) {
03751 mg_printf(conn->peer, "%s: %s\r\n", ri->http_headers[i].name,
03752 ri->http_headers[i].value);
03753 }
03754
03755 mg_write(conn->peer, "\r\n", 2);
03756
03757
03758 if (!strcmp(ri->request_method, "POST")) {
03759 forward_body_data(conn, NULL, conn->peer->client.sock, conn->peer->ssl);
03760 }
03761
03762
03763 while ((n = pull(NULL, conn->peer->client.sock, conn->peer->ssl,
03764 buf, sizeof(buf))) > 0) {
03765 if (mg_write(conn, buf, (size_t)n) != n) {
03766 break;
03767 }
03768 }
03769
03770 if (!conn->peer->client.is_ssl) {
03771 close_connection(conn->peer);
03772 free(conn->peer);
03773 conn->peer = NULL;
03774 }
03775 }
03776
03777 static int is_valid_uri(const char *uri) {
03778
03779
03780 return (uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0'));
03781 }
03782
03783 static void process_new_connection(struct mg_connection *conn) {
03784 struct mg_request_info *ri = &conn->request_info;
03785 int keep_alive_enabled;
03786 const char *cl;
03787
03788 keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
03789
03790 do {
03791 reset_per_request_attributes(conn);
03792
03793
03794 if ((conn->request_len = get_request_len(conn->buf, conn->data_len)) == 0) {
03795 conn->request_len = read_request(NULL, conn->client.sock, conn->ssl,
03796 conn->buf, conn->buf_size, &conn->data_len);
03797 }
03798 assert(conn->data_len >= conn->request_len);
03799 if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
03800 send_http_error(conn, 413, "Request Too Large", "");
03801 return;
03802 } if (conn->request_len <= 0) {
03803 return;
03804 }
03805
03806
03807 conn->buf[conn->request_len - 1] = '\0';
03808 if (!parse_http_request(conn->buf, ri) ||
03809 (!conn->client.is_proxy && !is_valid_uri(ri->uri))) {
03810
03811 send_http_error(conn, 400, "Bad Request",
03812 "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
03813 } else if (strcmp(ri->http_version, "1.0") &&
03814 strcmp(ri->http_version, "1.1")) {
03815
03816 send_http_error(conn, 505, "HTTP version not supported", "");
03817 log_access(conn);
03818 } else {
03819
03820 cl = get_header(ri, "Content-Length");
03821 conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
03822 conn->birth_time = time(NULL);
03823 if (conn->client.is_proxy) {
03824 handle_proxy_request(conn);
03825 } else {
03826 handle_request(conn);
03827 }
03828 log_access(conn);
03829 discard_current_request_from_buffer(conn);
03830 }
03831
03832 } while (conn->peer || (keep_alive_enabled && should_keep_alive(conn)));
03833 }
03834
03835
03836 static int consume_socket(struct mg_context *ctx, struct socket *sp) {
03837 (void) pthread_mutex_lock(&ctx->mutex);
03838 DEBUG_TRACE(("going idle"));
03839
03840
03841 while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
03842 pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
03843 }
03844
03845
03846 if (ctx->stop_flag) {
03847 (void) pthread_mutex_unlock(&ctx->mutex);
03848 return 0;
03849 }
03850 assert(ctx->sq_head > ctx->sq_tail);
03851
03852
03853 *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
03854 ctx->sq_tail++;
03855 DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
03856
03857
03858 while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
03859 ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
03860 ctx->sq_head -= ARRAY_SIZE(ctx->queue);
03861 }
03862
03863 (void) pthread_cond_signal(&ctx->sq_empty);
03864 (void) pthread_mutex_unlock(&ctx->mutex);
03865
03866 return 1;
03867 }
03868
03869 static void worker_thread(struct mg_context *ctx) {
03870 struct mg_connection *conn;
03871 int buf_size = atoi(ctx->config[MAX_REQUEST_SIZE]);
03872
03873 conn = calloc(1, sizeof(*conn) + buf_size);
03874 conn->buf_size = buf_size;
03875 conn->buf = (char *) (conn + 1);
03876 assert(conn != NULL);
03877
03878 (void) pthread_mutex_lock(&ctx->mutex);
03879 ctx->idle_threads++;
03880 (void) pthread_mutex_unlock(&ctx->mutex);
03881
03882 while (ctx->stop_flag == 0 && consume_socket(ctx, &conn->client)) {
03883 (void) pthread_mutex_lock(&ctx->mutex);
03884 ctx->idle_threads--;
03885 assert(ctx->idle_threads >= 0);
03886 if (ctx->idle_threads == 0 && (ctx->max_threads == 0 || (ctx->num_threads < ctx->max_threads))) {
03887 if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
03888 cry(fc(ctx), "Cannot start extra worker thread: %d", ERRNO);
03889 } else {
03890 ctx->num_threads++;
03891 }
03892 }
03893 (void) pthread_mutex_unlock(&ctx->mutex);
03894
03895 conn->birth_time = time(NULL);
03896 conn->ctx = ctx;
03897
03898
03899
03900
03901 conn->request_info.remote_port = ntohs(conn->client.rsa.u.sin.sin_port);
03902 memcpy(&conn->request_info.remote_ip,
03903 &conn->client.rsa.u.sin.sin_addr.s_addr, 4);
03904 conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
03905 conn->request_info.is_ssl = conn->client.is_ssl;
03906
03907 if (!conn->client.is_ssl ||
03908 (conn->client.is_ssl && sslize(conn, SSL_accept))) {
03909 process_new_connection(conn);
03910 }
03911
03912 close_connection(conn);
03913
03914 (void) pthread_mutex_lock(&ctx->mutex);
03915 ctx->idle_threads++;
03916 if (ctx->num_threads > ctx->base_threads && ctx->idle_threads > 1) {
03917 (void) pthread_mutex_unlock(&ctx->mutex);
03918 break;
03919 }
03920 (void) pthread_mutex_unlock(&ctx->mutex);
03921 }
03922 free(conn);
03923
03924
03925 (void) pthread_mutex_lock(&ctx->mutex);
03926 ctx->num_threads--;
03927 ctx->idle_threads--;
03928 (void) pthread_cond_signal(&ctx->cond);
03929 assert(ctx->num_threads >= 0);
03930 assert(ctx->idle_threads >= 0);
03931 (void) pthread_mutex_unlock(&ctx->mutex);
03932
03933 DEBUG_TRACE(("exiting"));
03934 }
03935
03936
03937 static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
03938 (void) pthread_mutex_lock(&ctx->mutex);
03939
03940
03941 while (ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
03942 (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
03943 }
03944 assert(ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue));
03945
03946
03947 ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
03948 ctx->sq_head++;
03949 DEBUG_TRACE(("queued socket %d", sp->sock));
03950
03951 (void) pthread_cond_signal(&ctx->sq_full);
03952 (void) pthread_mutex_unlock(&ctx->mutex);
03953 }
03954
03955 static void accept_new_connection(const struct socket *listener,
03956 struct mg_context *ctx) {
03957 struct socket accepted;
03958 int allowed;
03959
03960 accepted.rsa.len = sizeof(accepted.rsa.u.sin);
03961 accepted.lsa = listener->lsa;
03962 accepted.sock = accept(listener->sock, &accepted.rsa.u.sa, &accepted.rsa.len);
03963 if (accepted.sock != INVALID_SOCKET) {
03964 allowed = check_acl(ctx, &accepted.rsa);
03965 if (allowed) {
03966
03967 DEBUG_TRACE(("accepted socket %d", accepted.sock));
03968 accepted.is_ssl = listener->is_ssl;
03969 accepted.is_proxy = listener->is_proxy;
03970 produce_socket(ctx, &accepted);
03971 } else {
03972 cry(fc(ctx), "%s: %s is not allowed to connect",
03973 __func__, inet_ntoa(accepted.rsa.u.sin.sin_addr));
03974 (void) closesocket(accepted.sock);
03975 }
03976 }
03977 }
03978
03979 static void master_thread(struct mg_context *ctx) {
03980 fd_set read_set;
03981 struct timeval tv;
03982 struct socket *sp;
03983 int max_fd;
03984
03985 while (ctx->stop_flag == 0) {
03986 FD_ZERO(&read_set);
03987 max_fd = -1;
03988
03989
03990 for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
03991 add_to_set(sp->sock, &read_set, &max_fd);
03992 }
03993
03994 tv.tv_sec = 0;
03995 tv.tv_usec = 200 * 1000;
03996
03997 if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
03998 #ifdef _WIN32
03999
04000
04001
04002 sleep(1);
04003 #endif // _WIN32
04004 } else {
04005 for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
04006 if (FD_ISSET(sp->sock, &read_set)) {
04007 accept_new_connection(sp, ctx);
04008 }
04009 }
04010 }
04011 }
04012 DEBUG_TRACE(("stopping workers"));
04013
04014
04015 close_all_listening_sockets(ctx);
04016
04017
04018 pthread_cond_broadcast(&ctx->sq_full);
04019
04020
04021 (void) pthread_mutex_lock(&ctx->mutex);
04022 while (ctx->num_threads > 0) {
04023 (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
04024 }
04025 (void) pthread_mutex_unlock(&ctx->mutex);
04026
04027
04028 (void) pthread_mutex_destroy(&ctx->mutex);
04029 (void) pthread_cond_destroy(&ctx->cond);
04030 (void) pthread_cond_destroy(&ctx->sq_empty);
04031 (void) pthread_cond_destroy(&ctx->sq_full);
04032
04033
04034 ctx->stop_flag = 2;
04035
04036 DEBUG_TRACE(("exiting"));
04037 }
04038
04039 static void free_context(struct mg_context *ctx) {
04040 int i;
04041
04042
04043 for (i = 0; i < NUM_OPTIONS; i++) {
04044 if (ctx->config[i] != NULL)
04045 free(ctx->config[i]);
04046 }
04047
04048
04049 if (ctx->ssl_ctx != NULL) {
04050 SSL_CTX_free(ctx->ssl_ctx);
04051 }
04052 #ifndef NO_SSL
04053 if (ssl_mutexes != NULL) {
04054 free(ssl_mutexes);
04055 }
04056 #endif // !NO_SSL
04057
04058
04059 free(ctx);
04060 }
04061
04062 void mg_stop(struct mg_context *ctx) {
04063 ctx->stop_flag = 1;
04064
04065
04066 while (ctx->stop_flag != 2) {
04067 (void) sleep(0);
04068 }
04069 free_context(ctx);
04070
04071 #if defined(_WIN32)
04072 (void) WSACleanup();
04073 #endif // _WIN32
04074 }
04075
04076 struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
04077 const char **options) {
04078 struct mg_context *ctx;
04079 const char *name, *value, *default_value;
04080 int i;
04081
04082 #if defined(_WIN32)
04083 WSADATA data;
04084 WSAStartup(MAKEWORD(2,2), &data);
04085 #endif // _WIN32
04086
04087
04088
04089 ctx = calloc(1, sizeof(*ctx));
04090 ctx->user_callback = user_callback;
04091 ctx->user_data = user_data;
04092
04093 while (options && (name = *options++) != NULL) {
04094 if ((i = get_option_index(name)) == -1) {
04095 cry(fc(ctx), "Invalid option: %s", name);
04096 free_context(ctx);
04097 return NULL;
04098 } else if ((value = *options++) == NULL) {
04099 cry(fc(ctx), "%s: option value cannot be NULL", name);
04100 free_context(ctx);
04101 return NULL;
04102 }
04103 ctx->config[i] = mg_strdup(value);
04104 DEBUG_TRACE(("[%s] -> [%s]", name, value));
04105 }
04106
04107
04108 for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
04109 default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
04110 if (ctx->config[i] == NULL && default_value != NULL) {
04111 ctx->config[i] = mg_strdup(default_value);
04112 DEBUG_TRACE(("Setting default: [%s] -> [%s]",
04113 config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
04114 default_value));
04115 }
04116 }
04117
04118 if (ctx->config[MAX_THREADS] == NULL) {
04119 ctx->config[MAX_THREADS] = ctx->config[NUM_THREADS];
04120 }
04121
04122 ctx->base_threads = atoi(ctx->config[NUM_THREADS]);
04123 ctx->max_threads = atoi(ctx->config[MAX_THREADS]);
04124
04125
04126
04127 if (!set_gpass_option(ctx) ||
04128 #if !defined(NO_SSL)
04129 !set_ssl_option(ctx) ||
04130 #endif
04131 !set_ports_option(ctx) ||
04132 #if !defined(_WIN32)
04133 !set_uid_option(ctx) ||
04134 #endif
04135 !set_acl_option(ctx)) {
04136 free_context(ctx);
04137 return NULL;
04138 }
04139
04140 #if !defined(_WIN32)
04141
04142
04143 (void) signal(SIGPIPE, SIG_IGN);
04144 #endif // !_WIN32
04145
04146 (void) pthread_mutex_init(&ctx->mutex, NULL);
04147 (void) pthread_cond_init(&ctx->cond, NULL);
04148 (void) pthread_cond_init(&ctx->sq_empty, NULL);
04149 (void) pthread_cond_init(&ctx->sq_full, NULL);
04150
04151
04152 start_thread(ctx, (mg_thread_func_t) master_thread, ctx);
04153
04154
04155 for (i = 0; i < ctx->base_threads; i++) {
04156 if (start_thread(ctx, (mg_thread_func_t) worker_thread, ctx) != 0) {
04157 cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
04158 } else {
04159 ctx->num_threads++;
04160 }
04161 }
04162
04163 return ctx;
04164 }