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));
139 * input string from pipe
141 int serv_getln(char *strbuf, int bufsize)
147 StrBuf_ServGetln(WCC->MigrateReadLineBuf);
148 len = StrLength(WCC->MigrateReadLineBuf);
151 memcpy(strbuf, ChrPtr(WCC->MigrateReadLineBuf), len);
152 FlushStrBuf(WCC->MigrateReadLineBuf);
155 lprintf(9, "%3d>%s\n", WC->serv_sock, strbuf);
161 int StrBuf_ServGetln(StrBuf *buf)
164 const char *ErrStr = NULL;
167 rc = StrBufTCP_read_buffered_line_fast(buf,
175 lprintf(1, "Server connection broken: %s\n",
178 WCC->serv_sock = (-1);
185 int StrBuf_ServGetBLOBBuffered(StrBuf *buf, long BlobSize)
191 rc = StrBufReadBLOBBuffered(buf,
201 lprintf(1, "Server connection broken: %s\n",
204 WCC->serv_sock = (-1);
211 int StrBuf_ServGetBLOB(StrBuf *buf, long BlobSize)
218 rc = StrBufReadBLOB(buf, &WCC->serv_sock, 1, BlobSize, &ErrStr);
221 lprintf(1, "Server connection broken: %s\n",
224 WCC->serv_sock = (-1);
232 * send binary to server
233 * buf the buffer to write to citadel server
234 * nbytes how many bytes to send to citadel server
236 void serv_write(const char *buf, int nbytes)
239 int bytes_written = 0;
242 FlushStrBuf(WCC->ReadBuf);
244 while (bytes_written < nbytes) {
245 retval = write(WCC->serv_sock, &buf[bytes_written],
246 nbytes - bytes_written);
248 const char *ErrStr = strerror(errno);
249 lprintf(1, "Server connection broken: %s\n",
251 close(WCC->serv_sock);
252 WCC->serv_sock = (-1);
257 bytes_written = bytes_written + retval;
263 * send line to server
264 * string the line to send to the citadel server
266 void serv_puts(const char *string)
270 lprintf(9, "%3d<%s\n", WC->serv_sock, string);
272 FlushStrBuf(WCC->ReadBuf);
275 serv_write(string, strlen(string));
280 * send line to server
281 * string the line to send to the citadel server
283 void serv_putbuf(const StrBuf *string)
287 lprintf(9, "%3d<%s\n", WC->serv_sock, ChrPtr(string));
289 FlushStrBuf(WCC->ReadBuf);
292 serv_write(ChrPtr(string), StrLength(string));
298 * convenience function to send stuff to the server
299 * format the formatstring
300 * ... the entities to insert into format
302 void serv_printf(const char *format,...)
309 FlushStrBuf(WCC->ReadBuf);
312 va_start(arg_ptr, format);
313 vsnprintf(buf, sizeof buf, format, arg_ptr);
319 serv_write(buf, len);
321 lprintf(9, "<%s", buf);
328 int ClientGetLine(ParsedHttpHdrs *Hdr, StrBuf *Target)
330 const char *Error, *pch, *pchs;
331 int rlen, len, retval = 0;
336 if (StrLength(Hdr->ReadBuf) > 0) {
337 pchs = ChrPtr(Hdr->ReadBuf);
338 pch = strchr(pchs, '\n');
342 if (len > 0 && (*(pch - 1) == '\r') )
344 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
345 StrBufCutLeft(Hdr->ReadBuf, len + 1);
350 while (retval == 0) {
352 pchs = ChrPtr(Hdr->ReadBuf);
354 pch = strchr(pchs, '\n');
356 retval = client_read_sslbuffer(Hdr->ReadBuf, SLEEPING);
357 pchs = ChrPtr(Hdr->ReadBuf);
358 pch = strchr(pchs, '\n');
367 if ((retval > 0) && (pch != NULL)) {
370 if (len > 0 && (*(pch - 1) == '\r') )
372 StrBufSub(Target, Hdr->ReadBuf, 0, len - rlen);
373 StrBufCutLeft(Hdr->ReadBuf, len + 1);
382 return StrBufTCP_read_buffered_line_fast(Target,
392 * This is a generic function to set up a master socket for listening on
393 * a TCP port. The server shuts down if the bind fails.
395 * ip_addr IP address to bind
396 * port_number port number to bind
397 * queue_len number of incoming connections to allow in the queue
399 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
402 struct sockaddr_in sin;
405 memset(&sin, 0, sizeof(sin));
406 sin.sin_family = AF_INET;
407 if (ip_addr == NULL) {
408 sin.sin_addr.s_addr = INADDR_ANY;
410 sin.sin_addr.s_addr = inet_addr(ip_addr);
413 if (sin.sin_addr.s_addr == INADDR_NONE) {
414 sin.sin_addr.s_addr = INADDR_ANY;
417 if (port_number == 0) {
418 lprintf(1, "Cannot start: no port number specified.\n");
419 return (-WC_EXIT_BIND);
421 sin.sin_port = htons((u_short) port_number);
423 p = getprotobyname("tcp");
425 s = socket(PF_INET, SOCK_STREAM, (p->p_proto));
427 lprintf(1, "Can't create a socket: %s\n", strerror(errno));
428 return (-WC_EXIT_BIND);
430 /* Set some socket options that make sense. */
432 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
435 fcntl(s, F_SETFL, O_NONBLOCK); /* maide: this statement is incorrect
436 there should be a preceding F_GETFL
437 and a bitwise OR with the previous
441 if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) < 0) {
442 lprintf(1, "Can't bind: %s\n", strerror(errno));
443 return (-WC_EXIT_BIND);
445 if (listen(s, queue_len) < 0) {
446 lprintf(1, "Can't listen: %s\n", strerror(errno));
447 return (-WC_EXIT_BIND);
455 * Create a Unix domain socket and listen on it
456 * sockpath - file name of the unix domain socket
457 * queue_len - Number of incoming connections to allow in the queue
459 int ig_uds_server(char *sockpath, int queue_len)
461 struct sockaddr_un addr;
464 int actual_queue_len;
466 actual_queue_len = queue_len;
467 if (actual_queue_len < 5) actual_queue_len = 5;
469 i = unlink(sockpath);
470 if ((i != 0) && (errno != ENOENT)) {
471 lprintf(1, "webcit: can't unlink %s: %s\n",
472 sockpath, strerror(errno));
473 return (-WC_EXIT_BIND);
476 memset(&addr, 0, sizeof(addr));
477 addr.sun_family = AF_UNIX;
478 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
480 s = socket(AF_UNIX, SOCK_STREAM, 0);
482 lprintf(1, "webcit: Can't create a socket: %s\n",
484 return (-WC_EXIT_BIND);
487 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
488 lprintf(1, "webcit: Can't bind: %s\n",
490 return (-WC_EXIT_BIND);
493 if (listen(s, actual_queue_len) < 0) {
494 lprintf(1, "webcit: Can't listen: %s\n",
496 return (-WC_EXIT_BIND);
499 chmod(sockpath, 0777);
507 * Read data from the client socket.
509 * sock socket fd to read from
510 * buf buffer to read into
511 * bytes number of bytes to read
512 * timeout Number of seconds to wait before timing out
514 * Possible return values:
515 * 1 Requested number of bytes has been read.
516 * 0 Request timed out.
517 * -1 Connection is broken, or other error.
519 int client_read_to(ParsedHttpHdrs *Hdr, StrBuf *Target, int bytes, int timeout)
529 baselen = StrLength(Target);
531 if (Hdr->Pos == NULL)
532 Hdr->Pos = ChrPtr(Hdr->ReadBuf);
533 bufremain = StrLength(Hdr->ReadBuf) - (Hdr->Pos - ChrPtr(Hdr->ReadBuf));
535 if (bytes < bufremain)
537 StrBufAppendBufPlain(Target, Hdr->Pos, bufremain, 0);
538 StrBufCutLeft(Hdr->ReadBuf, bufremain);
540 if (bytes > bufremain)
542 while ((StrLength(Hdr->ReadBuf) + StrLength(Target) < bytes + baselen) &&
544 retval = client_read_sslbuffer(Hdr->ReadBuf, timeout);
546 StrBufAppendBuf(Target, Hdr->ReadBuf, 0); /* todo: Buf > bytes? */
548 write(2, "\033[32m", 5);
549 write(2, buf, bytes);
550 write(2, "\033[30m", 5);
555 lprintf(2, "client_read_ssl() failed\n");
564 retval = StrBufReadBLOBBuffered(Target,
573 lprintf(2, "client_read() failed: %s\n",
579 write(2, "\033[32m", 5);
580 write(2, buf, bytes);
581 write(2, "\033[30m", 5);
588 * Begin buffering HTTP output so we can transmit it all in one write operation later.
590 void begin_burst(void)
592 if (WC->WBuf == NULL) {
593 WC->WBuf = NewStrBufPlain(NULL, 32768);
599 * Finish buffering HTTP output. [Compress using zlib and] output with a Content-Length: header.
604 const char *ptr, *eptr;
610 if (!DisableGzip && (WCC->Hdr->HR.gzip_ok))
612 if (CompressBuffer(WCC->WBuf) > 0)
613 hprintf("Content-encoding: gzip\r\n");
615 lprintf(CTDL_ALERT, "Compression failed: %d [%s] sending uncompressed\n", errno, strerror(errno));
620 if (WCC->Hdr->HR.prohibit_caching)
621 hprintf("Pragma: no-cache\r\nCache-Control: no-store\r\nExpires:-1\r\n");
622 hprintf("Content-length: %d\r\n\r\n", StrLength(WCC->WBuf));
624 ptr = ChrPtr(WCC->HBuf);
625 count = StrLength(WCC->HBuf);
630 client_write_ssl(WCC->HBuf);
631 client_write_ssl(WCC->WBuf);
639 write(2, "\033[34m", 5);
640 write(2, ptr, StrLength(WCC->WBuf));
641 write(2, "\033[30m", 5);
643 if (WCC->Hdr->http_sock == -1)
645 fdflags = fcntl(WC->Hdr->http_sock, F_GETFL);
647 while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)){
648 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
650 FD_SET(WCC->Hdr->http_sock, &wset);
651 if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
652 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
657 if ((WCC->Hdr->http_sock == -1) ||
658 (res = write(WCC->Hdr->http_sock,
661 lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
669 ptr = ChrPtr(WCC->WBuf);
670 count = StrLength(WCC->WBuf);
675 write(2, "\033[34m", 5);
676 write(2, ptr, StrLength(WCC->WBuf));
677 write(2, "\033[30m", 5);
680 while ((ptr < eptr) && (WCC->Hdr->http_sock != -1)) {
681 if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
683 FD_SET(WCC->Hdr->http_sock, &wset);
684 if (select(WCC->Hdr->http_sock + 1, NULL, &wset, NULL, NULL) == -1) {
685 lprintf(2, "client_write: Socket select failed (%s)\n", strerror(errno));
690 if ((WCC->Hdr->http_sock == -1) ||
691 (res = write(WCC->Hdr->http_sock,
694 lprintf(2, "client_write: Socket write failed (%s)\n", strerror(errno));
702 return StrLength(WCC->WBuf);
707 * lingering_close() a`la Apache. see
708 * http://www.apache.org/docs/misc/fin_wait_2.html for rationale
710 int lingering_close(int fd)
715 struct timeval tv, start;
717 gettimeofday(&start, NULL);
723 gettimeofday(&tv, NULL);
724 tv.tv_sec = SLEEPING - (tv.tv_sec - start.tv_sec);
725 tv.tv_usec = start.tv_usec - tv.tv_usec;
726 if (tv.tv_usec < 0) {
728 tv.tv_usec += 1000000;
732 i = select(fd + 1, &set, NULL, NULL, &tv);
733 } while (i == -1 && errno == EINTR);
738 i = read(fd, buf, sizeof buf);
739 } while (i != 0 && (i != -1 || errno == EINTR));
745 HttpNewModule_TCPSOCKETS
746 (ParsedHttpHdrs *httpreq)
749 httpreq->ReadBuf = NewStrBufPlain(NULL, SIZ * 4);
753 HttpDetachModule_TCPSOCKETS
754 (ParsedHttpHdrs *httpreq)
757 FlushStrBuf(httpreq->ReadBuf);
758 ReAdjustEmptyBuf(httpreq->ReadBuf, 4 * SIZ, SIZ);
762 HttpDestroyModule_TCPSOCKETS
763 (ParsedHttpHdrs *httpreq)
766 FreeStrBuf(&httpreq->ReadBuf);
771 SessionNewModule_TCPSOCKETS
774 sess->CLineBuf = NewStrBuf();
775 sess->MigrateReadLineBuf = NewStrBuf();
779 SessionDestroyModule_TCPSOCKETS
782 FreeStrBuf(&sess->CLineBuf);
783 FreeStrBuf(&sess->ReadBuf);
784 FreeStrBuf(&sess->MigrateReadLineBuf);
785 if (sess->serv_sock > 0)
786 close(sess->serv_sock);