/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2012, Daniel Stenberg, , et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at http://curl.haxx.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ /* sws.c: simple (silly?) web server This code was originally graciously donated to the project by Juergen Wilke. Thanks a bunch! */ #define CURL_NO_OLDIES #include "setup.h" /* portability help from the lib directory */ #ifdef HAVE_SIGNAL_H #include #endif #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_NETINET_TCP_H #include /* for TCP_NODELAY */ #endif #define ENABLE_CURLX_PRINTF /* make the curlx header define all printf() functions to use the curlx_* versions instead */ #include "curlx.h" /* from the private lib dir */ #include "getpart.h" #include "util.h" #include "server_sockaddr.h" /* include memdebug.h last */ #include "memdebug.h" #if !defined(CURL_SWS_FORK_ENABLED) && defined(HAVE_FORK) /* * The normal sws build for the plain standard curl test suite has no use for * fork(), but if you feel wild and crazy and want to setup some more exotic * tests. Define this and run... */ #define CURL_SWS_FORK_ENABLED #endif #ifdef ENABLE_IPV6 static bool use_ipv6 = FALSE; #endif static bool use_gopher = FALSE; static const char *ipv_inuse = "IPv4"; static int serverlogslocked = 0; static bool is_proxy = FALSE; #define REQBUFSIZ 150000 #define REQBUFSIZ_TXT "149999" static long prevtestno=-1; /* previous test number we served */ static long prevpartno=-1; /* previous part number we served */ static bool prevbounce=FALSE; /* instructs the server to increase the part number for a test in case the identical testno+partno request shows up again */ #define RCMD_NORMALREQ 0 /* default request, use the tests file normally */ #define RCMD_IDLE 1 /* told to sit idle */ #define RCMD_STREAM 2 /* told to stream */ struct httprequest { char reqbuf[REQBUFSIZ]; /* buffer area for the incoming request */ size_t checkindex; /* where to start checking of the request */ size_t offset; /* size of the incoming request */ long testno; /* test number found in the request */ long partno; /* part number found in the request */ bool open; /* keep connection open info, as found in the request */ bool auth_req; /* authentication required, don't wait for body unless there's an Authorization header */ bool auth; /* Authorization header present in the incoming request */ size_t cl; /* Content-Length of the incoming request */ bool digest; /* Authorization digest header found */ bool ntlm; /* Authorization ntlm header found */ int writedelay; /* if non-zero, delay this number of seconds between writes in the response */ int pipe; /* if non-zero, expect this many requests to do a "piped" request/response */ int skip; /* if non-zero, the server is instructed to not read this many bytes from a PUT/POST request. Ie the client sends N bytes said in Content-Length, but the server only reads N - skip bytes. */ int rcmd; /* doing a special command, see defines above */ int prot_version; /* HTTP version * 10 */ bool pipelining; /* true if request is pipelined */ int callcount; /* times ProcessRequest() gets called */ int connect_port; /* the port number CONNECT used */ }; static int ProcessRequest(struct httprequest *req); static void storerequest(char *reqbuf, size_t totalsize); #define DEFAULT_PORT 8999 #ifndef DEFAULT_LOGFILE #define DEFAULT_LOGFILE "log/sws.log" #endif const char *serverlogfile = DEFAULT_LOGFILE; #define SWSVERSION "cURL test suite HTTP server/0.1" #define REQUEST_DUMP "log/server.input" #define RESPONSE_DUMP "log/server.response" /* when told to run as proxy, we store the logs in different files so that they can co-exist with the same program running as a "server" */ #define REQUEST_PROXY_DUMP "log/proxy.input" #define RESPONSE_PROXY_DUMP "log/proxy.response" /* very-big-path support */ #define MAXDOCNAMELEN 140000 #define MAXDOCNAMELEN_TXT "139999" #define REQUEST_KEYWORD_SIZE 256 #define REQUEST_KEYWORD_SIZE_TXT "255" #define CMD_AUTH_REQUIRED "auth_required" /* 'idle' means that it will accept the request fine but never respond any data. Just keep the connection alive. */ #define CMD_IDLE "idle" /* 'stream' means to send a never-ending stream of data */ #define CMD_STREAM "stream" #define END_OF_HEADERS "\r\n\r\n" enum { DOCNUMBER_NOTHING = -7, DOCNUMBER_QUIT = -6, DOCNUMBER_BADCONNECT = -5, DOCNUMBER_INTERNAL= -4, DOCNUMBER_CONNECT = -3, DOCNUMBER_WERULEZ = -2, DOCNUMBER_404 = -1 }; static const char *end_of_headers = END_OF_HEADERS; /* sent as reply to a QUIT */ static const char *docquit = "HTTP/1.1 200 Goodbye" END_OF_HEADERS; /* sent as reply to a CONNECT */ static const char *docconnect = "HTTP/1.1 200 Mighty fine indeed" END_OF_HEADERS; /* sent as reply to a "bad" CONNECT */ static const char *docbadconnect = "HTTP/1.1 501 Forbidden you fool" END_OF_HEADERS; /* send back this on 404 file not found */ static const char *doc404 = "HTTP/1.1 404 Not Found\r\n" "Server: " SWSVERSION "\r\n" "Connection: close\r\n" "Content-Type: text/html" END_OF_HEADERS "\n" "\n" "404 Not Found\n" "\n" "

Not Found

\n" "The requested URL was not found on this server.\n" "

" SWSVERSION "
\n" "\n"; /* do-nothing macro replacement for systems which lack siginterrupt() */ #ifndef HAVE_SIGINTERRUPT #define siginterrupt(x,y) do {} while(0) #endif /* vars used to keep around previous signal handlers */ typedef RETSIGTYPE (*SIGHANDLER_T)(int); #ifdef SIGHUP static SIGHANDLER_T old_sighup_handler = SIG_ERR; #endif #ifdef SIGPIPE static SIGHANDLER_T old_sigpipe_handler = SIG_ERR; #endif #ifdef SIGALRM static SIGHANDLER_T old_sigalrm_handler = SIG_ERR; #endif #ifdef SIGINT static SIGHANDLER_T old_sigint_handler = SIG_ERR; #endif #ifdef SIGTERM static SIGHANDLER_T old_sigterm_handler = SIG_ERR; #endif /* var which if set indicates that the program should finish execution */ SIG_ATOMIC_T got_exit_signal = 0; /* if next is set indicates the first signal handled in exit_signal_handler */ static volatile int exit_signal = 0; /* signal handler that will be triggered to indicate that the program should finish its execution in a controlled manner as soon as possible. The first time this is called it will set got_exit_signal to one and store in exit_signal the signal that triggered its execution. */ static RETSIGTYPE exit_signal_handler(int signum) { int old_errno = ERRNO; if(got_exit_signal == 0) { got_exit_signal = 1; exit_signal = signum; } (void)signal(signum, exit_signal_handler); SET_ERRNO(old_errno); } static void install_signal_handlers(void) { #ifdef SIGHUP /* ignore SIGHUP signal */ if((old_sighup_handler = signal(SIGHUP, SIG_IGN)) == SIG_ERR) logmsg("cannot install SIGHUP handler: %s", strerror(ERRNO)); #endif #ifdef SIGPIPE /* ignore SIGPIPE signal */ if((old_sigpipe_handler = signal(SIGPIPE, SIG_IGN)) == SIG_ERR) logmsg("cannot install SIGPIPE handler: %s", strerror(ERRNO)); #endif #ifdef SIGALRM /* ignore SIGALRM signal */ if((old_sigalrm_handler = signal(SIGALRM, SIG_IGN)) == SIG_ERR) logmsg("cannot install SIGALRM handler: %s", strerror(ERRNO)); #endif #ifdef SIGINT /* handle SIGINT signal with our exit_signal_handler */ if((old_sigint_handler = signal(SIGINT, exit_signal_handler)) == SIG_ERR) logmsg("cannot install SIGINT handler: %s", strerror(ERRNO)); else siginterrupt(SIGINT, 1); #endif #ifdef SIGTERM /* handle SIGTERM signal with our exit_signal_handler */ if((old_sigterm_handler = signal(SIGTERM, exit_signal_handler)) == SIG_ERR) logmsg("cannot install SIGTERM handler: %s", strerror(ERRNO)); else siginterrupt(SIGTERM, 1); #endif } static void restore_signal_handlers(void) { #ifdef SIGHUP if(SIG_ERR != old_sighup_handler) (void)signal(SIGHUP, old_sighup_handler); #endif #ifdef SIGPIPE if(SIG_ERR != old_sigpipe_handler) (void)signal(SIGPIPE, old_sigpipe_handler); #endif #ifdef SIGALRM if(SIG_ERR != old_sigalrm_handler) (void)signal(SIGALRM, old_sigalrm_handler); #endif #ifdef SIGINT if(SIG_ERR != old_sigint_handler) (void)signal(SIGINT, old_sigint_handler); #endif #ifdef SIGTERM if(SIG_ERR != old_sigterm_handler) (void)signal(SIGTERM, old_sigterm_handler); #endif } static int ProcessRequest(struct httprequest *req) { char *line=&req->reqbuf[req->checkindex]; bool chunked = FALSE; static char request[REQUEST_KEYWORD_SIZE]; static char doc[MAXDOCNAMELEN]; char logbuf[456]; int prot_major, prot_minor; char *end; int error; end = strstr(line, end_of_headers); req->callcount++; logmsg("Process %d bytes request%s", req->offset, req->callcount > 1?" [CONTINUED]":""); /* try to figure out the request characteristics as soon as possible, but only once! */ if(use_gopher && (req->testno == DOCNUMBER_NOTHING) && !strncmp("/verifiedserver", line, 15)) { logmsg("Are-we-friendly question received"); req->testno = DOCNUMBER_WERULEZ; return 1; /* done */ } else if((req->testno == DOCNUMBER_NOTHING) && sscanf(line, "%" REQUEST_KEYWORD_SIZE_TXT"s %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d", request, doc, &prot_major, &prot_minor) == 4) { char *ptr; req->prot_version = prot_major*10 + prot_minor; /* find the last slash */ ptr = strrchr(doc, '/'); /* get the number after it */ if(ptr) { FILE *stream; char *filename; if((strlen(doc) + strlen(request)) < 400) sprintf(logbuf, "Got request: %s %s HTTP/%d.%d", request, doc, prot_major, prot_minor); else sprintf(logbuf, "Got a *HUGE* request HTTP/%d.%d", prot_major, prot_minor); logmsg("%s", logbuf); if(!strncmp("/verifiedserver", ptr, 15)) { logmsg("Are-we-friendly question received"); req->testno = DOCNUMBER_WERULEZ; return 1; /* done */ } if(!strncmp("/quit", ptr, 5)) { logmsg("Request-to-quit received"); req->testno = DOCNUMBER_QUIT; return 1; /* done */ } ptr++; /* skip the slash */ /* skip all non-numericals following the slash */ while(*ptr && !ISDIGIT(*ptr)) ptr++; req->testno = strtol(ptr, &ptr, 10); if(req->testno > 10000) { req->partno = req->testno % 10000; req->testno /= 10000; } else req->partno = 0; sprintf(logbuf, "Requested test number %ld part %ld", req->testno, req->partno); logmsg("%s", logbuf); filename = test2file(req->testno); stream=fopen(filename, "rb"); if(!stream) { error = ERRNO; logmsg("fopen() failed with error: %d %s", error, strerror(error)); logmsg("Error opening file: %s", filename); logmsg("Couldn't open test file %ld", req->testno); req->open = FALSE; /* closes connection */ return 1; /* done */ } else { char *orgcmd = NULL; char *cmd = NULL; size_t cmdsize = 0; int num=0; /* get the custom server control "commands" */ error = getpart(&orgcmd, &cmdsize, "reply", "servercmd", stream); fclose(stream); if(error) { logmsg("getpart() failed with error: %d", error); req->open = FALSE; /* closes connection */ return 1; /* done */ } cmd = orgcmd; while(cmd && cmdsize) { char *check; if(!strncmp(CMD_AUTH_REQUIRED, cmd, strlen(CMD_AUTH_REQUIRED))) { logmsg("instructed to require authorization header"); req->auth_req = TRUE; } else if(!strncmp(CMD_IDLE, cmd, strlen(CMD_IDLE))) { logmsg("instructed to idle"); req->rcmd = RCMD_IDLE; req->open = TRUE; } else if(!strncmp(CMD_STREAM, cmd, strlen(CMD_STREAM))) { logmsg("instructed to stream"); req->rcmd = RCMD_STREAM; } else if(1 == sscanf(cmd, "pipe: %d", &num)) { logmsg("instructed to allow a pipe size of %d", num); if(num < 0) logmsg("negative pipe size ignored"); else if(num > 0) req->pipe = num-1; /* decrease by one since we don't count the first request in this number */ } else if(1 == sscanf(cmd, "skip: %d", &num)) { logmsg("instructed to skip this number of bytes %d", num); req->skip = num; } else if(1 == sscanf(cmd, "writedelay: %d", &num)) { logmsg("instructed to delay %d secs between packets", num); req->writedelay = num; } else { logmsg("funny instruction found: %s", cmd); } /* try to deal with CRLF or just LF */ check = strchr(cmd, '\r'); if(!check) check = strchr(cmd, '\n'); if(check) { /* get to the letter following the newline */ while((*check == '\r') || (*check == '\n')) check++; if(!*check) /* if we reached a zero, get out */ break; cmd = check; } else break; } if(orgcmd) free(orgcmd); } } else { if(sscanf(req->reqbuf, "CONNECT %" MAXDOCNAMELEN_TXT "s HTTP/%d.%d", doc, &prot_major, &prot_minor) == 3) { char *portp; sprintf(logbuf, "Received a CONNECT %s HTTP/%d.%d request", doc, prot_major, prot_minor); logmsg("%s", logbuf); portp = strchr(doc, ':'); if(portp && (*(portp+1) != '\0') && ISDIGIT(*(portp+1))) req->connect_port = strtol(portp+1, NULL, 10); else req->connect_port = 0; if(req->prot_version == 10) req->open = FALSE; /* HTTP 1.0 closes connection by default */ if(!strncmp(doc, "bad", 3)) /* if the host name starts with bad, we fake an error here */ req->testno = DOCNUMBER_BADCONNECT; else if(!strncmp(doc, "test", 4)) /* if the host name starts with test, the port number used in the CONNECT line will be used as test number! */ req->testno = req->connect_port?req->connect_port:DOCNUMBER_CONNECT; else req->testno = DOCNUMBER_CONNECT; } else { logmsg("Did not find test number in PATH"); req->testno = DOCNUMBER_404; } } } else if((req->offset >= 3) && (req->testno == DOCNUMBER_NOTHING)) { logmsg("** Unusual request. Starts with %02x %02x %02x", line[0], line[1], line[2]); } if(!end) { /* we don't have a complete request yet! */ logmsg("request not complete yet"); return 0; /* not complete yet */ } logmsg("- request found to be complete"); if(use_gopher) { /* when using gopher we cannot check the request until the entire thing has been received */ char *ptr; /* find the last slash in the line */ ptr = strrchr(line, '/'); if(ptr) { ptr++; /* skip the slash */ /* skip all non-numericals following the slash */ while(*ptr && !ISDIGIT(*ptr)) ptr++; req->testno = strtol(ptr, &ptr, 10); if(req->testno > 10000) { req->partno = req->testno % 10000; req->testno /= 10000; } else req->partno = 0; sprintf(logbuf, "Requested GOPHER test number %ld part %ld", req->testno, req->partno); logmsg("%s", logbuf); } } if(req->pipe) /* we do have a full set, advance the checkindex to after the end of the headers, for the pipelining case mostly */ req->checkindex += (end - line) + strlen(end_of_headers); /* **** Persistence **** * * If the request is a HTTP/1.0 one, we close the connection unconditionally * when we're done. * * If the request is a HTTP/1.1 one, we MUST check for a "Connection:" * header that might say "close". If it does, we close a connection when * this request is processed. Otherwise, we keep the connection alive for X * seconds. */ do { if(got_exit_signal) return 1; /* done */ if((req->cl==0) && curlx_strnequal("Content-Length:", line, 15)) { /* If we don't ignore content-length, we read it and we read the whole request including the body before we return. If we've been told to ignore the content-length, we will return as soon as all headers have been received */ char *endptr; char *ptr = line + 15; unsigned long clen = 0; while(*ptr && ISSPACE(*ptr)) ptr++; endptr = ptr; SET_ERRNO(0); clen = strtoul(ptr, &endptr, 10); if((ptr == endptr) || !ISSPACE(*endptr) || (ERANGE == ERRNO)) { /* this assumes that a zero Content-Length is valid */ logmsg("Found invalid Content-Length: (%s) in the request", ptr); req->open = FALSE; /* closes connection */ return 1; /* done */ } req->cl = clen - req->skip; logmsg("Found Content-Length: %lu in the request", clen); if(req->skip) logmsg("... but will abort after %zu bytes", req->cl); break; } else if(curlx_strnequal("Transfer-Encoding: chunked", line, strlen("Transfer-Encoding: chunked"))) { /* chunked data coming in */ chunked = TRUE; } if(chunked) { if(strstr(req->reqbuf, "\r\n0\r\n\r\n")) /* end of chunks reached */ return 1; /* done */ else return 0; /* not done */ } line = strchr(line, '\n'); if(line) line++; } while(line); if(!req->auth && strstr(req->reqbuf, "Authorization:")) { req->auth = TRUE; /* Authorization: header present! */ if(req->auth_req) logmsg("Authorization header found, as required"); } if(!req->digest && strstr(req->reqbuf, "Authorization: Digest")) { /* If the client is passing this Digest-header, we set the part number to 1000. Not only to spice up the complexity of this, but to make Digest stuff to work in the test suite. */ req->partno += 1000; req->digest = TRUE; /* header found */ logmsg("Received Digest request, sending back data %ld", req->partno); } else if(!req->ntlm && strstr(req->reqbuf, "Authorization: NTLM TlRMTVNTUAAD")) { /* If the client is passing this type-3 NTLM header */ req->partno += 1002; req->ntlm = TRUE; /* NTLM found */ logmsg("Received NTLM type-3, sending back data %ld", req->partno); if(req->cl) { logmsg(" Expecting %zu POSTed bytes", req->cl); } } else if(!req->ntlm && strstr(req->reqbuf, "Authorization: NTLM TlRMTVNTUAAB")) { /* If the client is passing this type-1 NTLM header */ req->partno += 1001; req->ntlm = TRUE; /* NTLM found */ logmsg("Received NTLM type-1, sending back data %ld", req->partno); } else if((req->partno >= 1000) && strstr(req->reqbuf, "Authorization: Basic")) { /* If the client is passing this Basic-header and the part number is already >=1000, we add 1 to the part number. This allows simple Basic authentication negotiation to work in the test suite. */ req->partno += 1; logmsg("Received Basic request, sending back data %ld", req->partno); } if(strstr(req->reqbuf, "Connection: close")) req->open = FALSE; /* close connection after this request */ if(!req->pipe && req->open && req->prot_version >= 11 && end && req->reqbuf + req->offset > end + strlen(end_of_headers) && !req->cl && (!strncmp(req->reqbuf, "GET", strlen("GET")) || !strncmp(req->reqbuf, "HEAD", strlen("HEAD")))) { /* If we have a persistent connection, HTTP version >= 1.1 and GET/HEAD request, enable pipelining. */ req->checkindex = (end - req->reqbuf) + strlen(end_of_headers); req->pipelining = TRUE; } while(req->pipe) { if(got_exit_signal) return 1; /* done */ /* scan for more header ends within this chunk */ line = &req->reqbuf[req->checkindex]; end = strstr(line, end_of_headers); if(!end) break; req->checkindex += (end - line) + strlen(end_of_headers); req->pipe--; } /* If authentication is required and no auth was provided, end now. This makes the server NOT wait for PUT/POST data and you can then make the test case send a rejection before any such data has been sent. Test case 154 uses this.*/ if(req->auth_req && !req->auth) { logmsg("Return early due to auth requested by none provided"); return 1; /* done */ } if(req->cl > 0) { if(req->cl <= req->offset - (end - req->reqbuf) - strlen(end_of_headers)) return 1; /* done */ else return 0; /* not complete yet */ } return 1; /* done */ } /* store the entire request in a file */ static void storerequest(char *reqbuf, size_t totalsize) { int res; int error = 0; size_t written; size_t writeleft; FILE *dump; const char *dumpfile=is_proxy?REQUEST_PROXY_DUMP:REQUEST_DUMP; if (reqbuf == NULL) return; if (totalsize == 0) return; do { dump = fopen(dumpfile, "ab"); } while ((dump == NULL) && ((error = ERRNO) == EINTR)); if (dump == NULL) { logmsg("Error opening file %s error: %d %s", dumpfile, error, strerror(error)); logmsg("Failed to write request input "); return; } writeleft = totalsize; do { written = fwrite(&reqbuf[totalsize-writeleft], 1, writeleft, dump); if(got_exit_signal) goto storerequest_cleanup; if(written > 0) writeleft -= written; } while ((writeleft > 0) && ((error = ERRNO) == EINTR)); if(writeleft == 0) logmsg("Wrote request (%zu bytes) input to %s", totalsize, dumpfile); else if(writeleft > 0) { logmsg("Error writing file %s error: %d %s", dumpfile, error, strerror(error)); logmsg("Wrote only (%zu bytes) of (%zu bytes) request input to %s", totalsize-writeleft, totalsize, dumpfile); } storerequest_cleanup: do { res = fclose(dump); } while(res && ((error = ERRNO) == EINTR)); if(res) logmsg("Error closing file %s error: %d %s", dumpfile, error, strerror(error)); } /* return 0 on success, non-zero on failure */ static int get_request(curl_socket_t sock, struct httprequest *req) { int error; int fail = 0; int done_processing = 0; char *reqbuf = req->reqbuf; ssize_t got = 0; char *pipereq = NULL; size_t pipereq_length = 0; if(req->pipelining) { pipereq = reqbuf + req->checkindex; pipereq_length = req->offset - req->checkindex; } /*** Init the httprequest structure properly for the upcoming request ***/ req->checkindex = 0; req->offset = 0; req->testno = DOCNUMBER_NOTHING; req->partno = 0; req->open = TRUE; req->auth_req = FALSE; req->auth = FALSE; req->cl = 0; req->digest = FALSE; req->ntlm = FALSE; req->pipe = 0; req->skip = 0; req->writedelay = 0; req->rcmd = RCMD_NORMALREQ; req->prot_version = 0; req->pipelining = FALSE; req->callcount = 0; req->connect_port = 0; /*** end of httprequest init ***/ while(!done_processing && (req->offset < REQBUFSIZ-1)) { if(pipereq_length && pipereq) { memmove(reqbuf, pipereq, pipereq_length); got = curlx_uztosz(pipereq_length); pipereq_length = 0; } else { if(req->skip) /* we are instructed to not read the entire thing, so we make sure to only read what we're supposed to and NOT read the enire thing the client wants to send! */ got = sread(sock, reqbuf + req->offset, req->cl); else got = sread(sock, reqbuf + req->offset, REQBUFSIZ-1 - req->offset); } if(got_exit_signal) return 1; if(got == 0) { logmsg("Connection closed by client"); fail = 1; } else if(got < 0) { error = SOCKERRNO; logmsg("recv() returned error: (%d) %s", error, strerror(error)); fail = 1; } if(fail) { /* dump the request received so far to the external file */ reqbuf[req->offset] = '\0'; storerequest(reqbuf, req->offset); return 1; } logmsg("Read %zd bytes", got); req->offset += (size_t)got; reqbuf[req->offset] = '\0'; done_processing = ProcessRequest(req); if(got_exit_signal) return 1; if(done_processing && req->pipe) { logmsg("Waiting for another piped request"); done_processing = 0; req->pipe--; } } if((req->offset == REQBUFSIZ-1) && (got > 0)) { logmsg("Request would overflow buffer, closing connection"); /* dump request received so far to external file anyway */ reqbuf[REQBUFSIZ-1] = '\0'; fail = 1; } else if(req->offset > REQBUFSIZ-1) { logmsg("Request buffer overflow, closing connection"); /* dump request received so far to external file anyway */ reqbuf[REQBUFSIZ-1] = '\0'; fail = 1; } else reqbuf[req->offset] = '\0'; /* dump the request to an external file */ storerequest(reqbuf, req->pipelining ? req->checkindex : req->offset); if(got_exit_signal) return 1; return fail; /* return 0 on success */ } /* returns -1 on failure */ static int send_doc(curl_socket_t sock, struct httprequest *req) { ssize_t written; size_t count; const char *buffer; char *ptr=NULL; FILE *stream; char *cmd=NULL; size_t cmdsize=0; FILE *dump; bool persistant = TRUE; bool sendfailure = FALSE; size_t responsesize; int error = 0; int res; const char *responsedump = is_proxy?RESPONSE_PROXY_DUMP:RESPONSE_DUMP; static char weare[256]; char partbuf[80]="data"; logmsg("Send response test%ld section ", req->testno, req->partno); switch(req->rcmd) { default: case RCMD_NORMALREQ: break; /* continue with business as usual */ case RCMD_STREAM: #define STREAMTHIS "a string to stream 01234567890\n" count = strlen(STREAMTHIS); for (;;) { written = swrite(sock, STREAMTHIS, count); if(got_exit_signal) return -1; if(written != (ssize_t)count) { logmsg("Stopped streaming"); break; } } return -1; case RCMD_IDLE: /* Do nothing. Sit idle. Pretend it rains. */ return 0; } req->open = FALSE; if(req->testno < 0) { size_t msglen; char msgbuf[64]; switch(req->testno) { case DOCNUMBER_QUIT: logmsg("Replying to QUIT"); buffer = docquit; break; case DOCNUMBER_WERULEZ: /* we got a "friends?" question, reply back that we sure are */ logmsg("Identifying ourselves as friends"); sprintf(msgbuf, "WE ROOLZ: %ld\r\n", (long)getpid()); msglen = strlen(msgbuf); if(use_gopher) sprintf(weare, "%s", msgbuf); else sprintf(weare, "HTTP/1.1 200 OK\r\nContent-Length: %zu\r\n\r\n%s", msglen, msgbuf); buffer = weare; break; case DOCNUMBER_INTERNAL: logmsg("Bailing out due to internal error"); return -1; case DOCNUMBER_CONNECT: logmsg("Replying to CONNECT"); buffer = docconnect; break; case DOCNUMBER_BADCONNECT: logmsg("Replying to a bad CONNECT"); buffer = docbadconnect; break; case DOCNUMBER_404: default: logmsg("Replying to with a 404"); buffer = doc404; break; } count = strlen(buffer); } else { char *filename = test2file(req->testno); if(0 != req->partno) sprintf(partbuf, "data%ld", req->partno); stream=fopen(filename, "rb"); if(!stream) { error = ERRNO; logmsg("fopen() failed with error: %d %s", error, strerror(error)); logmsg("Error opening file: %s", filename); logmsg("Couldn't open test file"); return 0; } else { error = getpart(&ptr, &count, "reply", partbuf, stream); fclose(stream); if(error) { logmsg("getpart() failed with error: %d", error); return 0; } buffer = ptr; } if(got_exit_signal) { if(ptr) free(ptr); return -1; } /* re-open the same file again */ stream=fopen(filename, "rb"); if(!stream) { error = ERRNO; logmsg("fopen() failed with error: %d %s", error, strerror(error)); logmsg("Error opening file: %s", filename); logmsg("Couldn't open test file"); if(ptr) free(ptr); return 0; } else { /* get the custom server control "commands" */ error = getpart(&cmd, &cmdsize, "reply", "postcmd", stream); fclose(stream); if(error) { logmsg("getpart() failed with error: %d", error); if(ptr) free(ptr); return 0; } } } if(got_exit_signal) { if(ptr) free(ptr); if(cmd) free(cmd); return -1; } /* If the word 'swsclose' is present anywhere in the reply chunk, the connection will be closed after the data has been sent to the requesting client... */ if(strstr(buffer, "swsclose") || !count) { persistant = FALSE; logmsg("connection close instruction \"swsclose\" found in response"); } if(strstr(buffer, "swsbounce")) { prevbounce = TRUE; logmsg("enable \"swsbounce\" in the next request"); } else prevbounce = FALSE; dump = fopen(responsedump, "ab"); if(!dump) { error = ERRNO; logmsg("fopen() failed with error: %d %s", error, strerror(error)); logmsg("Error opening file: %s", responsedump); if(ptr) free(ptr); if(cmd) free(cmd); return -1; } responsesize = count; do { /* Ok, we send no more than 200 bytes at a time, just to make sure that larger chunks are split up so that the client will need to do multiple recv() calls to get it and thus we exercise that code better */ size_t num = count; if(num > 200) num = 200; written = swrite(sock, buffer, num); if (written < 0) { sendfailure = TRUE; break; } else { logmsg("Sent off %zd bytes", written); } if (req->writedelay) { logmsg("Pausing %d seconds", req->writedelay); sleep(req->writedelay); } /* write to file as well */ fwrite(buffer, 1, (size_t)written, dump); if(got_exit_signal) break; count -= written; buffer += written; } while(count>0); do { res = fclose(dump); } while(res && ((error = ERRNO) == EINTR)); if(res) logmsg("Error closing file %s error: %d %s", responsedump, error, strerror(error)); if(got_exit_signal) { if(ptr) free(ptr); if(cmd) free(cmd); return -1; } if(sendfailure) { logmsg("Sending response failed. Only (%zu bytes) of (%zu bytes) were sent", responsesize-count, responsesize); if(ptr) free(ptr); if(cmd) free(cmd); return -1; } logmsg("Response sent (%zu bytes) and written to %s", responsesize, responsedump); if(ptr) free(ptr); if(cmdsize > 0 ) { char command[32]; int quarters; int num; ptr=cmd; do { if(2 == sscanf(ptr, "%31s %d", command, &num)) { if(!strcmp("wait", command)) { logmsg("Told to sleep for %d seconds", num); quarters = num * 4; while(quarters > 0) { quarters--; res = wait_ms(250); if(got_exit_signal) break; if(res) { /* should not happen */ error = SOCKERRNO; logmsg("wait_ms() failed with error: (%d) %s", error, strerror(error)); break; } } if(!quarters) logmsg("Continuing after sleeping %d seconds", num); } else logmsg("Unknown command in reply command section"); } ptr = strchr(ptr, '\n'); if(ptr) ptr++; else ptr = NULL; } while(ptr && *ptr); } if(cmd) free(cmd); req->open = use_gopher?FALSE:persistant; prevtestno = req->testno; prevpartno = req->partno; return 0; } static curl_socket_t connect_to(const char *ipaddr, int port) { int flag; struct sockaddr_in sin; curl_socket_t serverfd; unsigned long hostaddr; hostaddr = inet_addr(ipaddr); if(hostaddr == ( in_addr_t)-1) return -1; logmsg("about to connect to %s:%d", ipaddr, port); serverfd = socket(AF_INET, SOCK_STREAM, 0); #ifdef TCP_NODELAY /* * Disable the Nagle algorithm */ flag = 1; if (setsockopt(serverfd, IPPROTO_TCP, TCP_NODELAY, (void *)&flag, sizeof(flag)) == -1) { logmsg("====> TCP_NODELAY for server conection failed"); } #endif sin.sin_family = AF_INET; sin.sin_port = htons((short)port); sin.sin_addr.s_addr = hostaddr; if (connect(serverfd, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in)) != 0) { fprintf(stderr, "failed to connect!\n"); return -1; } logmsg("connected fine to %s:%d, now tunnel!", ipaddr, port); return serverfd; } /* * A CONNECT has been received, a CONNECT response has been sent. * * This function needs to connect to the server, and then pass data between * the client and the server back and forth until the connection is closed by * either end. * * When doing FTP through a CONNECT proxy, we expect that the data connection * will be setup while the first connect is still being kept up. Therefor we * must accept a new connection and deal with it appropriately. */ #define data_or_ctrl(x) ((x)?"DATA":"CTRL") static int http_connect(curl_socket_t infd, curl_socket_t rootfd, struct httprequest *req, const char *ipaddr) { curl_socket_t serverfd[2]; curl_socket_t clientfd[2]; curl_socket_t datafd = CURL_SOCKET_BAD; int toc[2] = {0, 0}; /* number of bytes to client */ int tos[2] = {0, 0}; /* number of bytes to server */ char readclient[2][256]; char readserver[2][256]; bool poll_client[2] = { TRUE, TRUE }; bool poll_server[2] = { TRUE, TRUE }; int control=0; int i; sleep(1); /* sleep here to make sure the client gets the CONNECT response first and separate from the data that might follow here */ clientfd[0] = infd; clientfd[1] = CURL_SOCKET_BAD; serverfd[0] = connect_to(ipaddr, req->connect_port); if(CURL_SOCKET_BAD == serverfd[0]) return 1; /* failure */ serverfd[1] = CURL_SOCKET_BAD; /* nothing there (yet) */ /* connected, now tunnel */ while(1) { fd_set input; fd_set output; struct timeval timeout={1,0}; ssize_t rc; int maxfd=0; int used; FD_ZERO(&input); FD_ZERO(&output); if(CURL_SOCKET_BAD != rootfd) { FD_SET(rootfd, &input); /* monitor this for new connections */ maxfd=rootfd; } /* set sockets to wait for */ for(i=0; i<=control; i++) { int mostfd = clientfd[i] > serverfd[i]? clientfd[i]: serverfd[i]; used = 0; if(mostfd > maxfd) maxfd = mostfd; if(poll_client[i]) { FD_SET(clientfd[i], &input); used |= 1 << (i*4); } if(poll_server[i]) { FD_SET(serverfd[i], &input); used |= 2 << (i*4); } if(toc[i]) { /* if there is data to client, wait until we can write */ FD_SET(clientfd[i], &output); used |= 4 << (i*4); } if(tos[i]) { /* if there is data to server, wait until we can write */ FD_SET(serverfd[i], &output); used |= 8 << (i*4); } } rc = select(maxfd+1, &input, &output, NULL, &timeout); if(rc > 0) { /* socket action */ size_t len; int precontrol; if((CURL_SOCKET_BAD != rootfd) && FD_ISSET(rootfd, &input)) { /* a new connection! */ struct httprequest req2; datafd = accept(rootfd, NULL, NULL); if(CURL_SOCKET_BAD == datafd) return 4; /* error! */ logmsg("====> Client connect DATA"); if(get_request(datafd, &req2)) /* non-zero means error, break out of loop */ break; send_doc(datafd, &req2); if(DOCNUMBER_CONNECT != req2.testno) { /* eeek, not a CONNECT */ close(datafd); break; } /* deal with the new connection */ rootfd = CURL_SOCKET_BAD; /* prevent new connections */ clientfd[1] = datafd; /* connect to the server */ serverfd[1] = connect_to(ipaddr, req2.connect_port); if(serverfd[1] == CURL_SOCKET_BAD) { /* BADNESS, bail out */ break; } control = 1; /* now we have two connections to work with */ } /* store the value before the loop starts */ precontrol = control; for(i=0; i<=control; i++) { len = sizeof(readclient[i])-tos[i]; if(len && FD_ISSET(clientfd[i], &input)) { /* read from client */ rc = recv(clientfd[i], &readclient[i][tos[i]], len, 0); if(rc <= 0) { logmsg("[%s] got %d at %s:%d, STOP READING client", data_or_ctrl(i), rc, __FILE__, __LINE__); poll_client[i] = FALSE; } else { logmsg("[%s] READ %d bytes from client", data_or_ctrl(i), rc); logmsg("[%s] READ \"%s\"", data_or_ctrl(i), data_to_hex(&readclient[i][tos[i]], rc)); tos[i] += rc; } } len = sizeof(readserver[i])-toc[i]; if(len && FD_ISSET(serverfd[i], &input)) { /* read from server */ rc = recv(serverfd[i], &readserver[i][toc[i]], len, 0); if(rc <= 0) { logmsg("[%s] got %d at %s:%d, STOP READING server", data_or_ctrl(i), rc, __FILE__, __LINE__); poll_server[i] = FALSE; } else { logmsg("[%s] READ %d bytes from server", data_or_ctrl(i), rc); logmsg("[%s] READ \"%s\"", data_or_ctrl(i), data_to_hex(&readserver[i][toc[i]], rc)); toc[i] += rc; } } if(toc[i] && FD_ISSET(clientfd[i], &output)) { /* write to client */ rc = send(clientfd[i], readserver[i], toc[i], 0); if(rc <= 0) { logmsg("[%s] got %d at %s:%d", data_or_ctrl(i), rc, __FILE__, __LINE__); control--; break; } logmsg("[%s] SENT %d bytes to client", data_or_ctrl(i), rc); logmsg("[%s] SENT \"%s\"", data_or_ctrl(i), data_to_hex(readserver[i], rc)); if(toc[i] - rc) memmove(&readserver[i][0], &readserver[i][rc], toc[i]-rc); toc[i] -= rc; } if(tos[i] && FD_ISSET(serverfd[i], &output)) { /* write to server */ rc = send(serverfd[i], readclient[i], tos[i], 0); if(rc <= 0) { logmsg("[%s] got %d at %s:%d", data_or_ctrl(i), rc, __FILE__, __LINE__); control--; break; } logmsg("[%s] SENT %d bytes to server", data_or_ctrl(i), rc); logmsg("[%s] SENT \"%s\"", data_or_ctrl(i), data_to_hex(readclient[i], rc)); if(tos - rc) memmove(&readclient[i][0], &readclient[i][rc], tos[i]-rc); tos[i] -= rc; } if(!toc[i] && !poll_server[i]) { /* nothing to send to the client is left, and server polling is switched off, bail out */ logmsg("[%s] ENDING1", data_or_ctrl(i)); control--; } if(!tos[i] && !poll_client[i]) { /* nothing to send to the server is left, and client polling is switched off, bail out */ logmsg("[%s] ENDING2", data_or_ctrl(i)); control--; } } if(precontrol > control) { /* if the value was decremented we close the "lost" sockets */ if(serverfd[precontrol] != CURL_SOCKET_BAD) shutdown(serverfd[precontrol], SHUT_RDWR); if(clientfd[precontrol] != CURL_SOCKET_BAD) shutdown(clientfd[precontrol], SHUT_RDWR); sleep(1); if(serverfd[precontrol] != CURL_SOCKET_BAD) close(serverfd[precontrol]); if(clientfd[precontrol] != CURL_SOCKET_BAD) close(clientfd[precontrol]); } if(control < 0) break; } } #if 0 /* close all sockets we created */ for(i=0; i<2; i++) { if(serverfd[i] != CURL_SOCKET_BAD) close(serverfd[i]); if(clientfd[i] != CURL_SOCKET_BAD) close(clientfd[i]); } #endif return 0; } int main(int argc, char *argv[]) { srvr_sockaddr_union_t me; curl_socket_t sock = CURL_SOCKET_BAD; curl_socket_t msgsock = CURL_SOCKET_BAD; int wrotepidfile = 0; int flag; unsigned short port = DEFAULT_PORT; char *pidname= (char *)".http.pid"; struct httprequest req; int rc; int error; int arg=1; long pid; const char *hostport = "127.0.0.1"; #ifdef CURL_SWS_FORK_ENABLED bool use_fork = FALSE; #endif while(argc>arg) { if(!strcmp("--version", argv[arg])) { printf("sws IPv4%s" #ifdef CURL_SWS_FORK_ENABLED " FORK" #endif "\n" , #ifdef ENABLE_IPV6 "/IPv6" #else "" #endif ); return 0; } else if(!strcmp("--pidfile", argv[arg])) { arg++; if(argc>arg) pidname = argv[arg++]; } else if(!strcmp("--logfile", argv[arg])) { arg++; if(argc>arg) serverlogfile = argv[arg++]; } else if(!strcmp("--gopher", argv[arg])) { arg++; use_gopher = TRUE; end_of_headers = "\r\n"; /* gopher style is much simpler */ } else if(!strcmp("--ipv4", argv[arg])) { #ifdef ENABLE_IPV6 ipv_inuse = "IPv4"; use_ipv6 = FALSE; #endif arg++; } else if(!strcmp("--ipv6", argv[arg])) { #ifdef ENABLE_IPV6 ipv_inuse = "IPv6"; use_ipv6 = TRUE; #endif arg++; } #ifdef CURL_SWS_FORK_ENABLED else if(!strcmp("--fork", argv[arg])) { use_fork=TRUE; arg++; } #endif else if(!strcmp("--port", argv[arg])) { arg++; if(argc>arg) { char *endptr; unsigned long ulnum = strtoul(argv[arg], &endptr, 10); if((endptr != argv[arg] + strlen(argv[arg])) || (ulnum < 1025UL) || (ulnum > 65535UL)) { fprintf(stderr, "sws: invalid --port argument (%s)\n", argv[arg]); return 0; } port = curlx_ultous(ulnum); arg++; } } else if(!strcmp("--srcdir", argv[arg])) { arg++; if(argc>arg) { path = argv[arg]; arg++; } } else if(!strcmp("--connect", argv[arg])) { /* store the connect host, but also use this as a hint that we run as a proxy and do a few different internal choices */ arg++; if(argc>arg) { hostport = argv[arg]; arg++; is_proxy = TRUE; logmsg("Run as proxy, CONNECT to %s", hostport); } } else { puts("Usage: sws [option]\n" " --version\n" " --logfile [file]\n" " --pidfile [file]\n" " --ipv4\n" " --ipv6\n" " --port [port]\n" " --srcdir [path]\n" " --connect [ip4-addr]\n" " --gopher\n" " --fork"); return 0; } } #ifdef WIN32 win32_init(); atexit(win32_cleanup); #endif install_signal_handlers(); pid = (long)getpid(); #ifdef ENABLE_IPV6 if(!use_ipv6) #endif sock = socket(AF_INET, SOCK_STREAM, 0); #ifdef ENABLE_IPV6 else sock = socket(AF_INET6, SOCK_STREAM, 0); #endif if(CURL_SOCKET_BAD == sock) { error = SOCKERRNO; logmsg("Error creating socket: (%d) %s", error, strerror(error)); goto sws_cleanup; } flag = 1; if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&flag, sizeof(flag))) { error = SOCKERRNO; logmsg("setsockopt(SO_REUSEADDR) failed with error: (%d) %s", error, strerror(error)); goto sws_cleanup; } #ifdef ENABLE_IPV6 if(!use_ipv6) { #endif memset(&me.sa4, 0, sizeof(me.sa4)); me.sa4.sin_family = AF_INET; me.sa4.sin_addr.s_addr = INADDR_ANY; me.sa4.sin_port = htons(port); rc = bind(sock, &me.sa, sizeof(me.sa4)); #ifdef ENABLE_IPV6 } else { memset(&me.sa6, 0, sizeof(me.sa6)); me.sa6.sin6_family = AF_INET6; me.sa6.sin6_addr = in6addr_any; me.sa6.sin6_port = htons(port); rc = bind(sock, &me.sa, sizeof(me.sa6)); } #endif /* ENABLE_IPV6 */ if(0 != rc) { error = SOCKERRNO; logmsg("Error binding socket on port %hu: (%d) %s", port, error, strerror(error)); goto sws_cleanup; } logmsg("Running %s %s version on port %d", use_gopher?"GOPHER":"HTTP", ipv_inuse, (int)port); /* start accepting connections */ rc = listen(sock, 2); if(0 != rc) { error = SOCKERRNO; logmsg("listen() failed with error: (%d) %s", error, strerror(error)); goto sws_cleanup; } /* ** As soon as this server writes its pid file the test harness will ** attempt to connect to this server and initiate its verification. */ wrotepidfile = write_pidfile(pidname); if(!wrotepidfile) goto sws_cleanup; for (;;) { msgsock = accept(sock, NULL, NULL); if(got_exit_signal) break; if (CURL_SOCKET_BAD == msgsock) { error = SOCKERRNO; logmsg("MAJOR ERROR: accept() failed with error: (%d) %s", error, strerror(error)); break; } /* ** As soon as this server acepts a connection from the test harness it ** must set the server logs advisor read lock to indicate that server ** logs should not be read until this lock is removed by this server. */ set_advisor_read_lock(SERVERLOGS_LOCK); serverlogslocked = 1; #ifdef CURL_SWS_FORK_ENABLED if(use_fork) { /* The fork enabled version just forks off the child and don't care about it anymore, so don't assume otherwise. Beware and don't do this at home. */ rc = fork(); if(-1 == rc) { printf("MAJOR ERROR: fork() failed!\n"); break; } } else /* not a fork, just set rc so the following proceeds nicely */ rc = 0; /* 0 is returned to the child */ if(0 == rc) { #endif logmsg("====> Client connect"); #ifdef TCP_NODELAY /* * Disable the Nagle algorithm to make it easier to send out a large * response in many small segments to torture the clients more. */ flag = 1; if (setsockopt(msgsock, IPPROTO_TCP, TCP_NODELAY, (void *)&flag, sizeof(flag)) == -1) { logmsg("====> TCP_NODELAY failed"); } #endif /* initialization of httprequest struct is done in get_request(), but due to pipelining treatment the pipelining struct field must be initialized previously to FALSE every time a new connection arrives. */ req.pipelining = FALSE; do { if(got_exit_signal) break; if(get_request(msgsock, &req)) /* non-zero means error, break out of loop */ break; if(prevbounce) { /* bounce treatment requested */ if((req.testno == prevtestno) && (req.partno == prevpartno)) { req.partno++; logmsg("BOUNCE part number to %ld", req.partno); } else { prevbounce = FALSE; prevtestno = -1; prevpartno = -1; } } send_doc(msgsock, &req); if(got_exit_signal) break; if(DOCNUMBER_CONNECT == req.testno) { /* a CONNECT request, setup and talk the tunnel */ http_connect(msgsock, sock, &req, hostport); break; } if((req.testno < 0) && (req.testno != DOCNUMBER_CONNECT)) { logmsg("special request received, no persistency"); break; } if(!req.open) { logmsg("instructed to close connection after server-reply"); break; } if(req.open) { logmsg("=> persistant connection request ended, awaits new request\n"); /* const char *keepopen="[KEEPING CONNECTION OPEN]"; storerequest((char *)keepopen, strlen(keepopen)); */ } /* if we got a CONNECT, loop and get another request as well! */ } while(req.open || (req.testno == DOCNUMBER_CONNECT)); if(got_exit_signal) break; logmsg("====> Client disconnect"); if(!req.open) /* When instructed to close connection after server-reply we wait a very small amount of time before doing so. If this is not done client might get an ECONNRESET before reading a single byte of server-reply. */ wait_ms(50); sclose(msgsock); msgsock = CURL_SOCKET_BAD; if(serverlogslocked) { serverlogslocked = 0; clear_advisor_read_lock(SERVERLOGS_LOCK); } if (req.testno == DOCNUMBER_QUIT) break; #ifdef CURL_SWS_FORK_ENABLED } #endif } sws_cleanup: if((msgsock != sock) && (msgsock != CURL_SOCKET_BAD)) sclose(msgsock); if(sock != CURL_SOCKET_BAD) sclose(sock); if(got_exit_signal) logmsg("signalled to die"); if(wrotepidfile) unlink(pidname); if(serverlogslocked) { serverlogslocked = 0; clear_advisor_read_lock(SERVERLOGS_LOCK); } restore_signal_handlers(); if(got_exit_signal) { logmsg("========> %s sws (port: %d pid: %ld) exits with signal (%d)", ipv_inuse, (int)port, pid, exit_signal); /* * To properly set the return status of the process we * must raise the same signal SIGINT or SIGTERM that we * caught and let the old handler take care of it. */ raise(exit_signal); } logmsg("========> sws quits"); return 0; }