6 * Uncomment this to log all communications with the Citadel server
12 #include "webserver.h"
14 extern int DisableGzip;
17 * register the timeout
19 RETSIGTYPE timeout(int signum)
21 lprintf(1, "Connection timed out; unable to reach citserver\n");
22 /* no exit here, since we need to server the connection unreachable thing. exit(3); */
27 * Connect a unix domain socket
28 * sockpath where to open a unix domain socket
30 int uds_connectsock(char *sockpath)
32 struct sockaddr_un addr;
35 memset(&addr, 0, sizeof(addr));
36 addr.sun_family = AF_UNIX;
37 strncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
39 s = socket(AF_UNIX, SOCK_STREAM, 0);
41 lprintf(1, "Can't create socket[%s]: %s\n",
47 if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
48 lprintf(1, "Can't connect [%s]: %s\n",
60 * Connect a TCP/IP socket
61 * host the host to connect to
62 * service the service on the host to call
64 int tcp_connectsock(char *host, char *service)
70 struct sockaddr_in sin;
73 memset(&sin, 0, sizeof(sin));
74 sin.sin_family = AF_INET;
76 pse = getservbyname(service, "tcp");
78 sin.sin_port = pse->s_port;
79 } else if ((sin.sin_port = htons((u_short) atoi(service))) == 0) {
80 lprintf(1, "Can't get %s service entry\n", service);
83 phe = gethostbyname(host);
85 memcpy(&sin.sin_addr, phe->h_addr, phe->h_length);
86 } else if ((sin.sin_addr.s_addr = inet_addr(host)) == INADDR_NONE) {
87 lprintf(1, "Can't get %s host entry: %s\n",
88 host, strerror(errno));
91 if ((ppe = getprotobyname("tcp")) == 0) {
92 lprintf(1, "Can't get TCP protocol entry: %s\n",
97 s = socket(PF_INET, SOCK_STREAM, ppe->p_proto);
99 lprintf(1, "Can't create socket: %s\n", strerror(errno));
103 fdflags = fcntl(s, F_GETFL);
105 lprintf(1, "unable to get socket flags! %s.%s: %s \n",
106 host, service, strerror(errno));
107 fdflags = fdflags | O_NONBLOCK;
108 if (fcntl(s, F_SETFD, fdflags) < 0)
109 lprintf(1, "unable to set socket nonblocking flags! %s.%s: %s \n",
110 host, service, strerror(errno));
112 signal(SIGALRM, timeout);
115 if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
116 lprintf(1, "Can't connect to %s.%s: %s\n",
117 host, service, strerror(errno));
122 signal(SIGALRM, SIG_IGN);
124 fdflags = fcntl(s, F_GETFL);
126 lprintf(1, "unable to get socket flags! %s.%s: %s \n",
127 host, service, strerror(errno));
128 fdflags = fdflags | O_NONBLOCK;
129 if (fcntl(s, F_SETFD, fdflags) < 0)
130 lprintf(1, "unable to set socket nonblocking flags! %s.%s: %s \n",
131 host, service, strerror(errno));
138 * input string from pipe
140 int serv_getln(char *strbuf, int bufsize)
146 StrBuf_ServGetln(WCC->MigrateReadLineBuf);
147 len = StrLength(WCC->MigrateReadLineBuf);
150 memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
151 FlushStrBuf(WCC->MigrateReadLineBuf);
154 lprintf(9, "%3d>%s\n", WC->serv_sock, strbuf);
160 int StrBuf_ServGetln(StrBuf *buf)
163 const char *ErrStr = NULL;
166 rc = StrBufTCP_read_buffered_line_fast(buf,
174 lprintf(1, "Server connection broken: %s\n",
177 WCC->serv_sock = (-1);
184 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
190 rc = StrBufReadBLOBBuffered(buf,
200 lprintf(1, "Server connection broken: %s\n",
203 WCC->serv_sock = (-1);
210 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
217 rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &Err);
220 lprintf(1, "Server connection broken: %s\n",
223 WCC->serv_sock = (-1);
231 * send binary to server
232 * buf the buffer to write to citadel server
233 * nbytes how many bytes to send to citadel server
235 void serv_write(const char *buf, int nbytes)
238 int bytes_written = 0;
241 FlushStrBuf(WCC->ReadBuf);
243 while (bytes_written < nbytes) {
244 retval = write(WCC->serv_sock, &buf[bytes_written],
245 nbytes - bytes_written);
247 lprintf(1, "Server connection broken: %s\n",
249 close(WCC->serv_sock);
250 WCC->serv_sock = (-1);
255 bytes_written = bytes_written + retval;
261 * send line to server
262 * string the line to send to the citadel server
264 void serv_puts(const char *string)
268 lprintf(9, "%3d<%s\n", WC->serv_sock, string);
270 FlushStrBuf(WCC->ReadBuf);
273 serv_write(string, strlen(string));
278 * send line to server
279 * string the line to send to the citadel server
281 void serv_putbuf(const StrBuf *string)
285 lprintf(9, "%3d<%s\n", WC->serv_sock, ChrPtr(string));
287 FlushStrBuf(WCC->ReadBuf);
290 serv_write(ChrPtr(string), StrLength(string));
296 * convenience function to send stuff to the server
297 * format the formatstring
298 * ... the entities to insert into format
300 void serv_printf(const char *format,...)
307 FlushStrBuf(WCC->ReadBuf);
310 va_start(arg_ptr, format);
311 vsnprintf(buf, sizeof buf, format, arg_ptr);
317 serv_write(buf, len);
319 lprintf(9, "<%s", buf);
326 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
328 const char *Error, *pch, *pchs;
329 int rlen, len, retval = 0;
334 if (StrLength(Hdr->ReadBuf) > 0) {
335 pchs = ChrPtr(Hdr->ReadBuf);
336 pch = strchr(pchs, '\n');
340 if (len > 0 && (*(pch - 1) == '\r') )
342 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
343 StrBufCutLeft(Hdr->ReadBuf, len + 1);
348 while (retval == 0) {
350 pchs = ChrPtr(Hdr->ReadBuf);
352 pch = strchr(pchs, '\n');
354 retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
355 pchs = ChrPtr(Hdr->ReadBuf);
356 pch = strchr(pchs, '\n');
365 if ((retval > 0) && (pch != NULL)) {
368 if (len > 0 && (*(pch - 1) == '\r') )
370 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
371 StrBufCutLeft(Hdr->ReadBuf, len + 1);
380 return StrBufTCP_read_buffered_line_fast(Target,
390 * This is a generic function to set up a master socket for listening on
391 * a TCP port. The server shuts down if the bind fails.
393 * ip_addr IP address to bind
394 * port_number port number to bind
395 * queue_len number of incoming connections to allow in the queue
397 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
400 struct sockaddr_in sin;
403 memset(&sin, 0, sizeof(sin));
404 sin.sin_family = AF_INET;
405 if (ip_addr == NULL) {
406 sin.sin_addr.s_addr = INADDR_ANY;
408 sin.sin_addr.s_addr = inet_addr(ip_addr);
411 if (sin.sin_addr.s_addr == INADDR_NONE) {
412 sin.sin_addr.s_addr = INADDR_ANY;
415 if (port_number == 0) {
416 lprintf(1, "Cannot start: no port number specified.\n");
419 sin.sin_port = htons((u_short) port_number);
421 p = getprotobyname("tcp");
423 s = socket(PF_INET, SOCK_STREAM, (p->p_proto));
425 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
428 /* Set some socket options that make sense. */
430 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
433 fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
434 there should be a preceding F_GETFL
435 and a bitwise OR with the previous
439 if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
440 lprintf(1, "Can't bind: %s\n", strerror(errno));
443 if (listen(s, queue_len) < 0) {
444 lprintf(1, "Can't listen: %s\n", strerror(errno));
453 * Create a Unix domain socket and listen on it
454 * sockpath - file name of the unix domain socket
455 * queue_len - Number of incoming connections to allow in the queue
457 int ig_uds_server(char *sockpath, int queue_len)
459 struct sockaddr_un addr;
462 int actual_queue_len;
464 actual_queue_len = queue_len;
465 if (actual_queue_len < 5) actual_queue_len = 5;
467 i = unlink(sockpath);
468 if ((i != 0) && (errno != ENOENT)) {
469 lprintf(1, "webcit: can't unlink %s: %s\n",
470 sockpath, strerror(errno));
474 memset(&addr, 0, sizeof(addr));
475 addr.sun_family = AF_UNIX;
476 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
478 s = socket(AF_UNIX, SOCK_STREAM, 0);
480 lprintf(1, "webcit: Can't create a socket: %s\n",
485 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
486 lprintf(1, "webcit: Can't bind: %s\n",
491 if (listen(s, actual_queue_len) < 0) {
492 lprintf(1, "webcit: Can't listen: %s\n",
497 chmod(sockpath, 0777);
505 * Read data from the client socket.
507 * sock socket fd to read from
508 * buf buffer to read into
509 * bytes number of bytes to read
510 * timeout Number of seconds to wait before timing out
512 * Possible return values:
513 * 1 Requested number of bytes has been read.
514 * 0 Request timed out.
515 * -1 Connection is broken, or other error.
517 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
526 if (Hdr->Pos == NULL)
527 Hdr->Pos = ChrPtr(Hdr->ReadBuf);
528 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
530 if (bytes < bufremain)
532 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
533 StrBufCutLeft(Hdr->ReadBuf, bufremain);
535 if (bytes > bufremain)
537 while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes) &&
539 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
541 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
543 write(2, "\033[32m", 5);
544 write(2, buf, bytes);
545 write(2, "\033[30m", 5);
550 lprintf(2, "client_read_ssl() failed\n");
559 retval = StrBufReadBLOBBuffered(Target,
568 lprintf(2, "client_read() failed: %s\n",
574 write(2, "\033[32m", 5);
575 write(2, buf, bytes);
576 write(2, "\033[30m", 5);
583 * Begin buffering HTTP output so we can transmit it all in one write operation later.
585 void begin_burst(void)
587 if (WC->WBuf == NULL) {
588 WC->WBuf = NewStrBufPlain(NULL, 32768);
594 * Finish buffering HTTP output. [Compress using zlib and] output with a Content-Length: header.
599 const char *ptr, *eptr;
605 if (!DisableGzip && (WCC->Hdr->HR.gzip_ok) && CompressBuffer(WCC->WBuf))
607 hprintf("Content-encoding: gzip\r\n");
610 if (WCC->Hdr->HR.prohibit_caching)
611 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
612 hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
614 ptr = ChrPtr(WCC->HBuf);
615 count = StrLength(WCC->HBuf);
620 client_write_ssl(WCC->HBuf);
621 client_write_ssl(WCC->WBuf);
629 write(2, "\033[34m", 5);
630 write(2, ptr, StrLength(WCC->WBuf));
631 write(2, "\033[30m", 5);
633 if (WCC->Hdr->http_sock != -1)
635 fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
637 while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
638 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
640 FD_SET(WCC->Hdr->http_sock, &wset);
641 if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
642 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
647 if ((WCC->Hdr->http_sock == -1) ||
648 (res = write(WCC->Hdr->http_sock,
651 lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
659 ptr = ChrPtr(WCC->WBuf);
660 count = StrLength(WCC->WBuf);
665 write(2, "\033[34m", 5);
666 write(2, ptr, StrLength(WCC->WBuf));
667 write(2, "\033[30m", 5);
670 while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
671 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
673 FD_SET(WCC->Hdr->http_sock, &wset);
674 if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
675 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
680 if ((WCC->Hdr->http_sock == -1) ||
681 (res = write(WCC->Hdr->http_sock,
684 lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
692 return StrLength(WCC->WBuf);
697 * lingering_close() a`la Apache. see
698 * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
700 int lingering_close(int fd)
705 struct timeval tv, start;
707 gettimeofday(&start, NULL);
713 gettimeofday(&tv, NULL);
714 tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
715 tv.tv_usec = start.tv_usec - tv.tv_usec;
716 if (tv.tv_usec < 0) {
718 tv.tv_usec += 1000000;
722 i = select(fd + 1, &set, NULL, NULL, &tv);
723 } while (i == -1 && errno == EINTR);
728 i = read(fd, buf, sizeof buf);
729 } while (i != 0 && (i != -1 || errno == EINTR));
735 HttpNewModule_TCPSOCKETS
736 (ParsedHttpHdrs *httpreq)
739 httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
743 HttpDetachModule_TCPSOCKETS
744 (ParsedHttpHdrs *httpreq)
747 FlushStrBuf(httpreq->ReadBuf);
748 ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
752 HttpDestroyModule_TCPSOCKETS
753 (ParsedHttpHdrs *httpreq)
756 FreeStrBuf(&httpreq->ReadBuf);
761 SessionNewModule_TCPSOCKETS
764 sess->CLineBuf = NewStrBuf();
765 sess->MigrateReadLineBuf = NewStrBuf();
769 SessionDestroyModule_TCPSOCKETS
772 FreeStrBuf(&sess->CLineBuf);
773 FreeStrBuf(&sess->ReadBuf);
774 FreeStrBuf(&sess->MigrateReadLineBuf);
775 if (sess->serv_sock > 0)
776 close(sess->serv_sock);