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/* Extracted from anet.c to work properly with Hiredis error reporting.
*
* Copyright (c) 2006-2010, Salvatore Sanfilippo <antirez at gmail dot com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Redis nor the names of its contributors may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "fmacros.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <netdb.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include "hiredis.h"
#include "sds.h"
/* Forward declaration */
void __redisSetError(redisContext *c, int type, sds err);
static int redisCreateSocket(redisContext *c, int type) {
int s, on = 1;
if ((s = socket(type, SOCK_STREAM, 0)) == -1) {
__redisSetError(c,REDIS_ERR_IO,NULL);
return REDIS_ERR;
}
if (type == AF_INET) {
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) == -1) {
__redisSetError(c,REDIS_ERR_IO,NULL);
close(s);
return REDIS_ERR;
}
}
return s;
}
static int redisSetNonBlock(redisContext *c, int fd) {
int flags;
/* Set the socket nonblocking.
* Note that fcntl(2) for F_GETFL and F_SETFL can't be
* interrupted by a signal. */
if ((flags = fcntl(fd, F_GETFL)) == -1) {
__redisSetError(c,REDIS_ERR_IO,
sdscatprintf(sdsempty(), "fcntl(F_GETFL): %s", strerror(errno)));
close(fd);
return REDIS_ERR;
}
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1) {
__redisSetError(c,REDIS_ERR_IO,
sdscatprintf(sdsempty(), "fcntl(F_SETFL,O_NONBLOCK): %s", strerror(errno)));
close(fd);
return REDIS_ERR;
}
return REDIS_OK;
}
static int redisSetTcpNoDelay(redisContext *c, int fd) {
int yes = 1;
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &yes, sizeof(yes)) == -1) {
__redisSetError(c,REDIS_ERR_IO,
sdscatprintf(sdsempty(), "setsockopt(TCP_NODELAY): %s", strerror(errno)));
return REDIS_ERR;
}
return REDIS_OK;
}
int redisContextConnectTcp(redisContext *c, const char *addr, int port) {
int s;
int blocking = (c->flags & REDIS_BLOCK);
struct sockaddr_in sa;
if ((s = redisCreateSocket(c,AF_INET)) == REDIS_ERR)
return REDIS_ERR;
if (!blocking && redisSetNonBlock(c,s) == REDIS_ERR)
return REDIS_ERR;
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if (inet_aton(addr, &sa.sin_addr) == 0) {
struct hostent *he;
he = gethostbyname(addr);
if (he == NULL) {
__redisSetError(c,REDIS_ERR_OTHER,
sdscatprintf(sdsempty(),"can't resolve: %s",addr));
close(s);
return REDIS_ERR;
}
memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
}
if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
if (errno == EINPROGRESS && !blocking) {
/* This is ok. */
} else {
__redisSetError(c,REDIS_ERR_IO,NULL);
close(s);
return REDIS_ERR;
}
}
if (redisSetTcpNoDelay(c,s) != REDIS_OK) {
close(s);
return REDIS_ERR;
}
c->fd = s;
return REDIS_OK;
}
int redisContextConnectUnix(redisContext *c, const char *path) {
int s;
int blocking = (c->flags & REDIS_BLOCK);
struct sockaddr_un sa;
if ((s = redisCreateSocket(c,AF_LOCAL)) == REDIS_ERR)
return REDIS_ERR;
if (!blocking && redisSetNonBlock(c,s) != REDIS_OK)
return REDIS_ERR;
sa.sun_family = AF_LOCAL;
strncpy(sa.sun_path,path,sizeof(sa.sun_path)-1);
if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
if (errno == EINPROGRESS && !blocking) {
/* This is ok. */
} else {
__redisSetError(c,REDIS_ERR_IO,NULL);
close(s);
return REDIS_ERR;
}
}
c->fd = s;
return REDIS_OK;
}
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