uClibc: fix version check for 0.9.32
[openwrt.git] / package / uhttpd / src / uhttpd.c
index 8272962..1fd2134 100644 (file)
@@ -51,8 +51,8 @@ static void uh_config_parse(struct config *conf)
 {
        FILE *c;
        char line[512];
-       char *user = NULL;
-       char *pass = NULL;
+       char *col1 = NULL;
+       char *col2 = NULL;
        char *eol  = NULL;
 
        const char *path = conf->file ? conf->file : "/etc/httpd.conf";
@@ -66,35 +66,52 @@ static void uh_config_parse(struct config *conf)
                {
                        if( (line[0] == '/') && (strchr(line, ':') != NULL) )
                        {
-                               if( !(user = strchr(line, ':')) || (*user++ = 0) ||
-                                   !(pass = strchr(user, ':')) || (*pass++ = 0) ||
-                                       !(eol = strchr(pass, '\n')) || (*eol++  = 0) )
+                               if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+                                   !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+                                       !(eol = strchr(col2, '\n')) || (*eol++  = 0) )
                                                continue;
 
-                               if( !uh_auth_add(line, user, pass) )
+                               if( !uh_auth_add(line, col1, col2) )
                                {
                                        fprintf(stderr,
                                                "Notice: No password set for user %s, ignoring "
-                                               "authentication on %s\n", user, line
+                                               "authentication on %s\n", col1, line
                                        );
                                }
                        }
                        else if( !strncmp(line, "I:", 2) )
                        {
-                               if( !(user = strchr(line, ':')) || (*user++ = 0) ||
-                                   !(eol = strchr(user, '\n')) || (*eol++  = 0) )
+                               if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+                                   !(eol = strchr(col1, '\n')) || (*eol++  = 0) )
                                        continue;
 
-                               conf->index_file = strdup(user);
+                               conf->index_file = strdup(col1);
                        }
                        else if( !strncmp(line, "E404:", 5) )
                        {
-                               if( !(user = strchr(line, ':')) || (*user++ = 0) ||
-                                   !(eol = strchr(user, '\n')) || (*eol++  = 0) )
+                               if( !(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+                                   !(eol = strchr(col1, '\n')) || (*eol++  = 0) )
                                                continue;
 
-                               conf->error_handler = strdup(user);
+                               conf->error_handler = strdup(col1);
                        }
+#ifdef HAVE_CGI
+                       else if( (line[0] == '*') && (strchr(line, ':') != NULL) )
+                       {
+                               if( !(col1 = strchr(line, '*')) || (*col1++ = 0) ||
+                                   !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+                                   !(eol = strchr(col2, '\n')) || (*eol++  = 0) )
+                                               continue;
+
+                               if( !uh_interpreter_add(col1, col2) )
+                               {
+                                       fprintf(stderr,
+                                               "Unable to add interpreter %s for extension %s: "
+                                               "Out of memory\n", col2, col1
+                                       );
+                               }
+                       }
+#endif
                }
 
                fclose(c);
@@ -110,6 +127,8 @@ static int uh_socket_bind(
        int status;
        int bound = 0;
 
+       int tcp_ka_idl, tcp_ka_int, tcp_ka_cnt;
+
        struct listener *l = NULL;
        struct addrinfo *addrs = NULL, *p = NULL;
 
@@ -129,12 +148,29 @@ static int uh_socket_bind(
                }
 
                /* "address already in use" */
-               if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) == -1 )
+               if( setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) )
                {
                        perror("setsockopt()");
                        goto error;
                }
 
+               /* TCP keep-alive */
+               if( conf->tcp_keepalive > 0 )
+               {
+                       tcp_ka_idl = 1;
+                       tcp_ka_cnt = 3;
+                       tcp_ka_int = conf->tcp_keepalive;
+
+                       if( setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &yes, sizeof(yes)) ||
+                           setsockopt(sock, SOL_TCP, TCP_KEEPIDLE,  &tcp_ka_idl, sizeof(tcp_ka_idl)) ||
+                           setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, &tcp_ka_int, sizeof(tcp_ka_int)) ||
+                           setsockopt(sock, SOL_TCP, TCP_KEEPCNT,   &tcp_ka_cnt, sizeof(tcp_ka_cnt)) )
+                       {
+                           fprintf(stderr, "Notice: Unable to enable TCP keep-alive: %s\n",
+                               strerror(errno));
+                       }
+               }
+
                /* required to get parallel v4 + v6 working */
                if( p->ai_family == AF_INET6 )
                {
@@ -162,11 +198,7 @@ static int uh_socket_bind(
                /* add listener to global list */
                if( ! (l = uh_listener_add(sock, conf)) )
                {
-                       fprintf(stderr,
-                               "uh_listener_add(): Can not create more than "
-                               "%i listen sockets\n", UH_LIMIT_LISTENERS
-                       );
-
+                       fprintf(stderr, "uh_listener_add(): Failed to allocate memory\n");
                        goto error;
                }
 
@@ -266,7 +298,8 @@ static struct http_request * uh_http_header_parse(struct client *cl, char *buffe
                }
 
                /* check version */
-               if( strcmp(version, "HTTP/0.9") && strcmp(version, "HTTP/1.0") && strcmp(version, "HTTP/1.1") )
+               if( (version == NULL) || (strcmp(version, "HTTP/0.9") &&
+                   strcmp(version, "HTTP/1.0") && strcmp(version, "HTTP/1.1")) )
                {
                        /* unsupported version */
                        uh_http_response(cl, 400, "Bad Request");
@@ -311,8 +344,8 @@ static struct http_request * uh_http_header_parse(struct client *cl, char *buffe
                                hdrdata = &buffer[i+2];
                        }
 
-                       /* have no name and found [A-Z], start of name */
-                       else if( !hdrname && isalpha(buffer[i]) && isupper(buffer[i]) )
+                       /* have no name and found [A-Za-z], start of name */
+                       else if( !hdrname && isalpha(buffer[i]) )
                        {
                                hdrname = &buffer[i];
                        }
@@ -342,7 +375,6 @@ static struct http_request * uh_http_header_recv(struct client *cl)
        ssize_t blen = sizeof(buffer)-1;
        ssize_t rlen = 0;
 
-
        memset(buffer, 0, sizeof(buffer));
 
        while( blen > 0 )
@@ -358,44 +390,45 @@ static struct http_request * uh_http_header_recv(struct client *cl)
                if( select(cl->socket + 1, &reader, NULL, NULL, &timeout) > 0 )
                {
                        /* receive data */
-                       rlen = uh_tcp_peek(cl, bufptr, blen);
+                       ensure_out(rlen = uh_tcp_peek(cl, bufptr, blen));
 
-                       if( rlen > 0 )
+                       if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
                        {
-                               if( (idxptr = strfind(buffer, sizeof(buffer), "\r\n\r\n", 4)) )
-                               {
-                                       blen -= uh_tcp_recv(cl, bufptr, (int)(idxptr - bufptr) + 4);
+                               ensure_out(rlen = uh_tcp_recv(cl, bufptr,
+                                       (int)(idxptr - bufptr) + 4));
 
-                                       /* header read complete ... */
-                                       return uh_http_header_parse(cl, buffer, sizeof(buffer) - blen - 1);
-                               }
-                               else
-                               {
-                                       rlen = uh_tcp_recv(cl, bufptr, rlen);
-                                       blen -= rlen;
-                                       bufptr += rlen;
-                               }
+                               /* header read complete ... */
+                               blen -= rlen;
+                               return uh_http_header_parse(cl, buffer,
+                                       sizeof(buffer) - blen - 1);
                        }
                        else
                        {
-                               /* invalid request (unexpected eof/timeout) */
-                               uh_http_response(cl, 408, "Request Timeout");
-                               return NULL;
+                               ensure_out(rlen = uh_tcp_recv(cl, bufptr, rlen));
+
+                               /* unexpected eof - #7904 */
+                               if( rlen == 0 )
+                                       return NULL;
+
+                               blen -= rlen;
+                               bufptr += rlen;
                        }
                }
                else
                {
                        /* invalid request (unexpected eof/timeout) */
-                       uh_http_response(cl, 408, "Request Timeout");
                        return NULL;
                }
        }
 
        /* request entity too large */
        uh_http_response(cl, 413, "Request Entity Too Large");
+
+out:
        return NULL;
 }
 
+#if defined(HAVE_LUA) || defined(HAVE_CGI)
 static int uh_path_match(const char *prefix, const char *url)
 {
        if( (strstr(url, prefix) == url) &&
@@ -408,23 +441,193 @@ static int uh_path_match(const char *prefix, const char *url)
 
        return 0;
 }
+#endif
 
+static void uh_dispatch_request(
+       struct client *cl, struct http_request *req, struct path_info *pin
+) {
+#ifdef HAVE_CGI
+       struct interpreter *ipr = NULL;
 
-int main (int argc, char **argv)
-{
-#ifdef HAVE_LUA
-       /* Lua runtime */
-       lua_State *L = NULL;
+       if( uh_path_match(cl->server->conf->cgi_prefix, pin->name) ||
+               (ipr = uh_interpreter_lookup(pin->phys)) )
+       {
+               uh_cgi_request(cl, req, pin, ipr);
+       }
+       else
 #endif
+       {
+               uh_file_request(cl, req, pin);
+       }
+}
 
+static void uh_mainloop(struct config *conf, fd_set serv_fds, int max_fd)
+{
        /* master file descriptor list */
-       fd_set used_fds, serv_fds, read_fds;
+       fd_set used_fds, read_fds;
 
        /* working structs */
-       struct addrinfo hints;
        struct http_request *req;
        struct path_info *pin;
        struct client *cl;
+
+       /* maximum file descriptor number */
+       int new_fd, cur_fd = 0;
+
+       /* clear the master and temp sets */
+       FD_ZERO(&used_fds);
+       FD_ZERO(&read_fds);
+
+       /* backup server descriptor set */
+       used_fds = serv_fds;
+
+       /* loop */
+       while(run)
+       {
+               /* create a working copy of the used fd set */
+               read_fds = used_fds;
+
+               /* sleep until socket activity */
+               if( select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1 )
+               {
+                       perror("select()");
+                       exit(1);
+               }
+
+               /* run through the existing connections looking for data to be read */
+               for( cur_fd = 0; cur_fd <= max_fd; cur_fd++ )
+               {
+                       /* is a socket managed by us */
+                       if( FD_ISSET(cur_fd, &read_fds) )
+                       {
+                               /* is one of our listen sockets */
+                               if( FD_ISSET(cur_fd, &serv_fds) )
+                               {
+                                       /* handle new connections */
+                                       if( (new_fd = accept(cur_fd, NULL, 0)) != -1 )
+                                       {
+                                               /* add to global client list */
+                                               if( (cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL )
+                                               {
+#ifdef HAVE_TLS
+                                                       /* setup client tls context */
+                                                       if( conf->tls )
+                                                               conf->tls_accept(cl);
+#endif
+
+                                                       /* add client socket to global fdset */
+                                                       FD_SET(new_fd, &used_fds);
+                                                       fd_cloexec(new_fd);
+                                                       max_fd = max(max_fd, new_fd);
+                                               }
+
+                                               /* insufficient resources */
+                                               else
+                                               {
+                                                       fprintf(stderr,
+                                                               "uh_client_add(): Cannot allocate memory\n");
+
+                                                       close(new_fd);
+                                               }
+                                       }
+                               }
+
+                               /* is a client socket */
+                               else
+                               {
+                                       if( ! (cl = uh_client_lookup(cur_fd)) )
+                                       {
+                                               /* this should not happen! */
+                                               fprintf(stderr,
+                                                       "uh_client_lookup(): No entry for fd %i!\n",
+                                                       cur_fd);
+
+                                               goto cleanup;
+                                       }
+
+                                       /* parse message header */
+                                       if( (req = uh_http_header_recv(cl)) != NULL )
+                                       {
+                                               /* RFC1918 filtering required? */
+                                               if( conf->rfc1918_filter &&
+                                                   sa_rfc1918(&cl->peeraddr) &&
+                                                   !sa_rfc1918(&cl->servaddr) )
+                                               {
+                                                       uh_http_sendhf(cl, 403, "Forbidden",
+                                                               "Rejected request from RFC1918 IP "
+                                                               "to public server address");
+                                               }
+                                               else
+#ifdef HAVE_LUA
+                                               /* Lua request? */
+                                               if( conf->lua_state &&
+                                                   uh_path_match(conf->lua_prefix, req->url) )
+                                               {
+                                                       conf->lua_request(cl, req, conf->lua_state);
+                                               }
+                                               else
+#endif
+                                               /* dispatch request */
+                                               if( (pin = uh_path_lookup(cl, req->url)) != NULL )
+                                               {
+                                                       /* auth ok? */
+                                                       if( !pin->redirected && uh_auth_check(cl, req, pin) )
+                                                               uh_dispatch_request(cl, req, pin);
+                                               }
+
+                                               /* 404 */
+                                               else
+                                               {
+                                                       /* Try to invoke an error handler */
+                                                       pin = uh_path_lookup(cl, conf->error_handler);
+
+                                                       if( pin && uh_auth_check(cl, req, pin) )
+                                                       {
+                                                               req->redirect_status = 404;
+                                                               uh_dispatch_request(cl, req, pin);
+                                                       }
+                                                       else
+                                                       {
+                                                               uh_http_sendhf(cl, 404, "Not Found",
+                                                                       "No such file or directory");
+                                                       }
+                                               }
+                                       }
+
+#ifdef HAVE_TLS
+                                       /* free client tls context */
+                                       if( conf->tls )
+                                               conf->tls_close(cl);
+#endif
+
+                                       cleanup:
+
+                                       /* close client socket */
+                                       close(cur_fd);
+                                       FD_CLR(cur_fd, &used_fds);
+
+                                       /* remove from global client list */
+                                       uh_client_remove(cur_fd);
+                               }
+                       }
+               }
+       }
+
+#ifdef HAVE_LUA
+       /* destroy the Lua state */
+       if( conf->lua_state != NULL )
+               conf->lua_close(conf->lua_state);
+#endif
+}
+
+
+int main (int argc, char **argv)
+{
+       /* master file descriptor list */
+       fd_set serv_fds;
+
+       /* working structs */
+       struct addrinfo hints;
        struct sigaction sa;
        struct config conf;
 
@@ -432,7 +635,7 @@ int main (int argc, char **argv)
        sigset_t ss;
 
        /* maximum file descriptor number */
-       int new_fd, cur_fd, max_fd = 0;
+       int cur_fd, max_fd = 0;
 
 #ifdef HAVE_TLS
        int tls = 0;
@@ -452,10 +655,7 @@ int main (int argc, char **argv)
        void *lib;
 #endif
 
-       /* clear the master and temp sets */
-       FD_ZERO(&used_fds);
        FD_ZERO(&serv_fds);
-       FD_ZERO(&read_fds);
 
        /* handle SIGPIPE, SIGINT, SIGTERM, SIGCHLD */
        sa.sa_flags = 0;
@@ -524,7 +724,7 @@ int main (int argc, char **argv)
 #endif
 
        while( (opt = getopt(argc, argv,
-               "fSDC:K:E:I:p:s:h:c:l:L:d:r:m:x:t:T:")) > 0
+               "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:x:i:t:T:A:")) > 0
        ) {
                switch(opt)
                {
@@ -648,11 +848,30 @@ int main (int argc, char **argv)
                                conf.no_dirlists = 1;
                                break;
 
+                       case 'R':
+                               conf.rfc1918_filter = 1;
+                               break;
+
 #ifdef HAVE_CGI
                        /* cgi prefix */
                        case 'x':
                                conf.cgi_prefix = optarg;
                                break;
+
+                       /* interpreter */
+                       case 'i':
+                               if( (optarg[0] == '.') && (port = strchr(optarg, '=')) )
+                               {
+                                       *port++ = 0;
+                                       uh_interpreter_add(optarg, port);
+                               }
+                               else
+                               {
+                                       fprintf(stderr, "Error: Invalid interpreter: %s\n",
+                                               optarg);
+                                       exit(1);
+                               }
+                               break;
 #endif
 
 #ifdef HAVE_LUA
@@ -679,6 +898,11 @@ int main (int argc, char **argv)
                                conf.network_timeout = atoi(optarg);
                                break;
 
+                       /* tcp keep-alive */
+                       case 'A':
+                               conf.tcp_keepalive = atoi(optarg);
+                               break;
+
                        /* no fork */
                        case 'f':
                                nofork = 1;
@@ -728,12 +952,14 @@ int main (int argc, char **argv)
                                        "       -I string       Use given filename as index page for directories\n"
                                        "       -S              Do not follow symbolic links outside of the docroot\n"
                                        "       -D              Do not allow directory listings, send 403 instead\n"
+                                       "       -R              Enable RFC1918 filter\n"
 #ifdef HAVE_LUA
                                        "       -l string       URL prefix for Lua handler, default is '/lua'\n"
                                        "       -L file         Lua handler script, omit to disable Lua\n"
 #endif
 #ifdef HAVE_CGI
                                        "       -x string       URL prefix for CGI handler, default is '/cgi-bin'\n"
+                                       "       -i .ext=path    Use interpreter at path for files with the given extension\n"
 #endif
 #if defined(HAVE_CGI) || defined(HAVE_LUA)
                                        "       -t seconds      CGI and Lua script timeout in seconds, default is 60\n"
@@ -824,7 +1050,7 @@ int main (int argc, char **argv)
                        if( ! conf.lua_prefix )
                                conf.lua_prefix = "/lua";
 
-                       L = conf.lua_init(conf.lua_handler);
+                       conf.lua_state = conf.lua_init(conf.lua_handler);
                }
        }
 #endif
@@ -859,167 +1085,14 @@ int main (int argc, char **argv)
                }
        }
 
-       /* backup server descriptor set */
-       used_fds = serv_fds;
-
-       /* loop */
-       while(run)
-       {
-               /* create a working copy of the used fd set */
-               read_fds = used_fds;
-
-               /* sleep until socket activity */
-               if( select(max_fd + 1, &read_fds, NULL, NULL, NULL) == -1 )
-               {
-                       perror("select()");
-                       exit(1);
-               }
-
-               /* run through the existing connections looking for data to be read */
-               for( cur_fd = 0; cur_fd <= max_fd; cur_fd++ )
-               {
-                       /* is a socket managed by us */
-                       if( FD_ISSET(cur_fd, &read_fds) )
-                       {
-                               /* is one of our listen sockets */
-                               if( FD_ISSET(cur_fd, &serv_fds) )
-                               {
-                                       /* handle new connections */
-                                       if( (new_fd = accept(cur_fd, NULL, 0)) != -1 )
-                                       {
-                                               /* add to global client list */
-                                               if( (cl = uh_client_add(new_fd, uh_listener_lookup(cur_fd))) != NULL )
-                                               {
-#ifdef HAVE_TLS
-                                                       /* setup client tls context */
-                                                       if( conf.tls )
-                                                               conf.tls_accept(cl);
-#endif
-
-                                                       /* add client socket to global fdset */
-                                                       FD_SET(new_fd, &used_fds);
-                                                       fd_cloexec(new_fd);
-                                                       max_fd = max(max_fd, new_fd);
-                                               }
-
-                                               /* insufficient resources */
-                                               else
-                                               {
-                                                       fprintf(stderr,
-                                                               "uh_client_add(): Can not manage more than "
-                                                               "%i client sockets, connection dropped\n",
-                                                               UH_LIMIT_CLIENTS
-                                                       );
-
-                                                       close(new_fd);
-                                               }
-                                       }
-                               }
-
-                               /* is a client socket */
-                               else
-                               {
-                                       if( ! (cl = uh_client_lookup(cur_fd)) )
-                                       {
-                                               /* this should not happen! */
-                                               fprintf(stderr,
-                                                       "uh_client_lookup(): No entry for fd %i!\n",
-                                                       cur_fd);
-
-                                               goto cleanup;
-                                       }
-
-                                       /* parse message header */
-                                       if( (req = uh_http_header_recv(cl)) != NULL )
-                                       {
-#ifdef HAVE_LUA
-                                               /* Lua request? */
-                                               if( L && uh_path_match(conf.lua_prefix, req->url) )
-                                               {
-                                                       conf.lua_request(cl, req, L);
-                                               }
-                                               else
-#endif
-                                               /* dispatch request */
-                                               if( (pin = uh_path_lookup(cl, req->url)) != NULL )
-                                               {
-                                                       /* auth ok? */
-                                                       if( uh_auth_check(cl, req, pin) )
-                                                       {
-#ifdef HAVE_CGI
-                                                               if( uh_path_match(conf.cgi_prefix, pin->name) )
-                                                               {
-                                                                       uh_cgi_request(cl, req, pin);
-                                                               }
-                                                               else
-#endif
-                                                               {
-                                                                       uh_file_request(cl, req, pin);
-                                                               }
-                                                       }
-                                               }
-
-                                               /* 404 */
-                                               else
-                                               {
-                                                       /* Try to invoke an error handler */
-                                                       pin = uh_path_lookup(cl, conf.error_handler);
-
-                                                       if( pin && uh_auth_check(cl, req, pin) )
-                                                       {
-                                                               req->redirect_status = 404;
-
-#ifdef HAVE_CGI
-                                                               if( uh_path_match(conf.cgi_prefix, pin->name) )
-                                                               {
-                                                                       uh_cgi_request(cl, req, pin);
-                                                               }
-                                                               else
-#endif
-                                                               {
-                                                                       uh_file_request(cl, req, pin);
-                                                               }
-                                                       }
-                                                       else
-                                                       {
-                                                               uh_http_sendhf(cl, 404, "Not Found",
-                                                                       "No such file or directory");
-                                                       }
-                                               }
-                                       }
-
-                                       /* 400 */
-                                       else
-                                       {
-                                               uh_http_sendhf(cl, 400, "Bad Request",
-                                                       "Malformed request received");
-                                       }
-
-#ifdef HAVE_TLS
-                                       /* free client tls context */
-                                       if( conf.tls )
-                                               conf.tls_close(cl);
-#endif
-
-                                       cleanup:
-
-                                       /* close client socket */
-                                       close(cur_fd);
-                                       FD_CLR(cur_fd, &used_fds);
-
-                                       /* remove from global client list */
-                                       uh_client_remove(cur_fd);
-                               }
-                       }
-               }
-       }
+       /* server main loop */
+       uh_mainloop(&conf, serv_fds, max_fd);
 
 #ifdef HAVE_LUA
        /* destroy the Lua state */
-       if( L != NULL )
-               conf.lua_close(L);
+       if( conf.lua_state != NULL )
+               conf.lua_close(conf.lua_state);
 #endif
 
        return 0;
 }
-
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