2 * Copyright (c) 2004 Teodor Sigaev <teodor@sigaev.ru>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #ifdef HAVE_SYS_POLL_H
42 #error Not defined HAVE_POLL_H or HAVE_SYS_POLL_H
43 #endif /* HAVE_SYS_POLL_H */
44 #endif /* HAVE_POLL */
51 #include "connection.h"
56 setlinger( TC_Connection *cs ) {
59 socklen_t size = sizeof(val);
61 if (getsockopt(cs->fd, SOL_SOCKET,SO_ERROR,&val,&size) == -1) {
62 tlog(TL_ALARM,"getsockopt: %s:%d - %s(%d)",inet_ntoa(cs->serv_addr.sin_addr),
63 ntohs(cs->serv_addr.sin_port), strerror(errno), errno);
64 shutdown(cs->fd,SHUT_RDWR);
72 tlog(TL_ALARM,"getsockopt return: %s:%d - %s(%d)",inet_ntoa(cs->serv_addr.sin_addr),
73 ntohs(cs->serv_addr.sin_port), strerror(val), val);
74 shutdown(cs->fd,SHUT_RDWR);
82 ling.l_onoff = ling.l_linger = 0;
83 if (setsockopt(cs->fd, SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling))==-1) {
84 tlog(TL_ALARM,"setsockopt: LINGER %s:%d - %s",inet_ntoa(cs->serv_addr.sin_addr), ntohs(cs->serv_addr.sin_port),
86 shutdown(cs->fd,SHUT_RDWR);
92 cs->state = CS_CONNECTED;
97 TC_ClientInitConnection(TC_Connection *cs, char *name, u_int32_t port) {
100 cs = TC_fillConnection(cs, name, port);
103 if ((cs->fd= socket(AF_INET, SOCK_STREAM, 0)) < 0)
104 tlog(TL_CRIT|TL_EXIT,"socket4: %s:%d - %s",inet_ntoa(cs->serv_addr.sin_addr),
105 ntohs(cs->serv_addr.sin_port),strerror(errno));
107 if (setsockopt(cs->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)) < 0) {
108 tlog(TL_CRIT|TL_EXIT, "socketsockopt failed: %s", strerror(errno));
112 if ((flags=fcntl(cs->fd,F_GETFL,0)) == -1)
113 tlog(TL_ALARM,"fcntl F_GETFL - %s",strerror(errno));
114 if (fcntl(cs->fd,F_SETFL,flags|O_NDELAY) < 0 )
115 tlog(TL_ALARM,"fcntl O_NDELAY - %s",strerror(errno));
117 if (bind(cs->fd, (struct sockaddr *) &(cs->serv_addr), sizeof(cs->serv_addr)) < 0)
118 tlog(TL_CRIT|TL_EXIT, "cannot bind to %s address: %s",
119 inet_ntoa(cs->serv_addr.sin_addr), strerror(errno));
121 if (listen(cs->fd, 0) < 0)
122 tlog(TL_CRIT|TL_EXIT, "cannot listen to %s address: %s",
123 inet_ntoa(cs->serv_addr.sin_addr), strerror(errno));
129 TC_AcceptTcp(TC_Connection *cs) {
131 struct sockaddr_in cli_addr;
133 socklen_t clilen = sizeof(cli_addr);
136 if ( (ret = accept(cs->fd,(struct sockaddr *)&cli_addr, &clilen)) < 0 ) {
137 if ( errno == EAGAIN || errno == EWOULDBLOCK )
139 tlog(TL_ALARM,"TC_AcceptTcp: accept: %s", strerror(errno));
142 nc = (TC_Connection*)t0malloc(sizeof(TC_Connection));
145 if ((flags=fcntl(nc->fd,F_GETFL,0)) == -1)
146 tlog(TL_ALARM,"fcntl F_GETFL - %s",strerror(errno));
147 if (fcntl(nc->fd,F_SETFL,flags|O_NDELAY) < 0 )
148 tlog(TL_ALARM,"fcntl O_NDELAY - %s",strerror(errno));
149 memcpy( &(nc->serv_addr), &cli_addr, clilen );
150 nc->state = CS_CONNECTED;
157 TC_fillConnection(TC_Connection *sc, char *name, u_int32_t port) {
159 sc = (TC_Connection *)t0malloc(sizeof(TC_Connection));
160 sc->serv_addr.sin_family = AF_INET;
161 sc->serv_addr.sin_addr.s_addr = (name) ? inet_addr(name) : htonl(INADDR_ANY);
162 sc->serv_addr.sin_port = htons(port);
163 sc->state = CS_NOTINITED;
169 TC_ServerInitConnect( TC_Connection *cs ) {
172 if ( cs->state == CS_ERROR )
175 if ((cs->fd= socket(AF_INET, SOCK_STREAM, 0)) < 0) {
176 tlog(TL_CRIT,"socket4: %s:%d - %s",inet_ntoa(cs->serv_addr.sin_addr),
177 ntohs(cs->serv_addr.sin_port),strerror(errno));
178 cs->state = CS_ERROR;
182 if ((flags=fcntl(cs->fd,F_GETFL,0)) == -1)
183 tlog(TL_ALARM,"fcntl F_GETFL - %s",strerror(errno));
184 if (fcntl(cs->fd,F_SETFL,flags|O_NDELAY) < 0 )
185 tlog(TL_ALARM,"fcntl O_NDELAY - %s",strerror(errno));
187 if ( connect(cs->fd, (struct sockaddr *) &(cs->serv_addr),
188 sizeof(struct sockaddr_in)) < 0 ) {
189 if ( errno == EINPROGRESS || errno == EALREADY ) {
190 cs->state = CS_INPROCESS;
192 } else if (errno != EISCONN && errno != EALREADY &&
193 errno != EWOULDBLOCK && errno != EAGAIN) {
194 tlog(TL_DEBUG,"open4: %s:%d - %s",
195 inet_ntoa(cs->serv_addr.sin_addr), ntohs(cs->serv_addr.sin_port),
197 shutdown(cs->fd,SHUT_RDWR);
201 tlog(TL_DEBUG,"nonblock connect: %s:%d - %s [%d]",
202 inet_ntoa(cs->serv_addr.sin_addr),
203 ntohs(cs->serv_addr.sin_port),
204 strerror(errno),errno);
206 cs->state = CS_ERROR;
210 cs->state = CS_INPROCESS;
211 return TC_ServerConnect( cs );
216 TC_ServerConnect( TC_Connection *cs ) {
220 if ( cs->state != CS_INPROCESS )
224 pfd.events = POLLOUT;
226 ret = poll( &pfd, 1, 0 );
228 tlog( TL_CRIT, "TC_ServerConnect: poll: %s",
230 cs->state = CS_ERROR;
232 } else if ( ret == 0 )
235 if ( (pfd.revents & (POLLHUP | POLLNVAL | POLLERR)) ) {
236 tlog( TL_CRIT, "TC_ServerConnect: poll return connect error for %s:%d",
237 inet_ntoa(cs->serv_addr.sin_addr), ntohs(cs->serv_addr.sin_port));
238 cs->state = CS_ERROR;
242 if ( ! (pfd.revents & POLLOUT) )
246 return setlinger( cs );
250 TC_ReadyIO( TC_Connection **cs, int number, int timeout ) {
254 if ( number==0 || cs ==NULL ) {
255 usleep( timeout * 1000.0 );
258 pfd = (struct pollfd*) tmalloc( sizeof(struct pollfd) * number );
260 for(i=0; i<number;i++) {
261 if ( cs[i]->fd>0 && (cs[i]->state == CS_READ || cs[i]->state == CS_SEND) ) {
262 pfd[fdnum].fd = cs[i]->fd;
263 pfd[fdnum].events = ( cs[i]->state == CS_READ ) ? POLLIN : POLLOUT;
264 pfd[fdnum].revents = 0;
269 ret = poll( pfd, fdnum, timeout );
271 tlog( TL_CRIT, "TC_ReadyIO: poll: %s",
283 for(i=0; i<number;i++) {
284 if ( cs[i]->fd>0 && (cs[i]->state == CS_READ || cs[i]->state == CS_SEND) ) {
285 if ( pfd[fdnum].revents & (POLLHUP | POLLNVAL | POLLERR) ) {
286 tlog( TL_ALARM, "TC_ReadyIO: poll return error for %s:%d",
287 inet_ntoa(cs[i]->serv_addr.sin_addr),
288 ntohs(cs[i]->serv_addr.sin_port));
289 cs[i]->state = CS_ERROR;
291 } else if ( pfd[fdnum].revents & ( ( cs[i]->state == CS_READ ) ? POLLIN : POLLOUT ) ) {
304 TC_Send( TC_Connection *cs ) {
307 if ( cs->state == CS_ERROR )
310 if ( cs->state != CS_SEND ) {
315 if ( cs->ptr - cs->buf >= cs->len ) {
316 cs->state = CS_FINISHSEND;
317 return CS_FINISHSEND;
320 if ((sz=write(cs->fd, cs->ptr, cs->len - (cs->ptr - cs->buf)))==0 ||
321 (sz < 0 && (errno == EWOULDBLOCK || errno == EAGAIN))) {
323 /* SunOS 4.1.x, are broken and select() says that
324 * O_NDELAY sockets are always writable even when
325 * they're actually not.
331 if (errno != EPIPE && errno != EINVAL)
332 tlog(TL_ALARM, "write[%s:%d] - %s",
333 inet_ntoa(cs->serv_addr.sin_addr),
334 ntohs(cs->serv_addr.sin_port),
336 cs->state = CS_ERROR;
342 if ( cs->ptr - cs->buf >= cs->len ) {
343 cs->state = CS_FINISHSEND;
344 return CS_FINISHSEND;
351 resizeCS( TC_Connection *cs, int sz ) {
352 int diff = cs->ptr - cs->buf;
356 cs->buf = (char*)trealloc( (void*)cs->buf, cs->len );
357 cs->ptr = cs->buf + diff;
361 TC_Read( TC_Connection *cs ) {
362 int sz, totalread = -1, toread=0, alreadyread;
364 if ( cs->state == CS_ERROR )
367 if (cs->state != CS_READ ) {
372 alreadyread = cs->ptr - cs->buf;
373 if ( alreadyread < sizeof(u_int32_t) ) {
374 toread = sizeof(u_int32_t) - alreadyread;
375 resizeCS(cs, sizeof(u_int32_t));
377 totalread = *(u_int32_t*)(cs->buf);
378 toread = totalread - alreadyread;
380 cs->state = CS_FINISHREAD;
381 return CS_FINISHREAD;
383 resizeCS(cs, totalread);
386 if ((sz=read( cs->fd, cs->ptr, toread))<0) {
387 if (errno == EAGAIN || errno == EINTR) {
391 tlog(TL_ALARM,"read: finish - %s",strerror(errno));
392 cs->state = CS_ERROR;
399 if ( sz == 0 && alreadyread != totalread ) {
400 tlog(TL_ALARM,"read: disconnecting");
401 cs->state = CS_ERROR;
404 cs->state = ( alreadyread == totalread ) ? CS_FINISHREAD : CS_READ;
409 TC_FreeConnection( TC_Connection *cs ) {
410 if ( cs->state == CS_CLOSED )
416 if ( cs->fd && cs->state != CS_NOTINITED ) {
417 shutdown(cs->fd,SHUT_RDWR);
421 cs->state = CS_CLOSED;
425 TC_Talk( TC_Connection *cs ) {
426 u_int32_t ret = TC_ServerInitConnect( cs );
428 while( ret == CS_INPROCESS ) {
429 ret = TC_ServerConnect(cs);
432 if ( ret != CS_CONNECTED )
435 while( ret != CS_FINISHSEND ) {
437 if ( ret == CS_ERROR ) return ret;
442 while( cs->state != CS_FINISHREAD ) {
443 while( !TC_ReadyIO( &cs, 1, 100) );
444 if ( TC_Read(cs) == CS_ERROR ) return CS_ERROR;