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