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Use getaddrinfo(3) in redisContextConnectTcp.

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Change redisContextConnectTcp() function to use getaddrinfo(3) to
perform address resolution, socket creation and connection. Resolved
addresses are limited to those reachable by the AF_INET family.
This commit is contained in:
Geoff Garside 2011-06-17 19:26:46 +01:00
parent b4664b41c7
commit 3afe2585de
1 changed files with 43 additions and 37 deletions
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80
net.c
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@ -187,50 +187,56 @@ int redisContextSetTimeout(redisContext *c, struct timeval tv) {
}
int redisContextConnectTcp(redisContext *c, const char *addr, int port, struct timeval *timeout) {
int s;
int s, rv;
char _port[6]; /* strlen("65535"); */
struct addrinfo hints, *servinfo, *p;
int blocking = (c->flags & REDIS_BLOCK);
struct sockaddr_in sa;
if ((s = redisCreateSocket(c,AF_INET)) < 0)
return REDIS_ERR;
if (redisSetBlocking(c,s,0) != REDIS_OK)
snprintf(_port, 6, "%d", port);
memset(&hints,0,sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
if ((rv = getaddrinfo(addr,_port,&hints,&servinfo)) != 0) {
__redisSetError(c,REDIS_ERR_OTHER,gai_strerror(rv));
return REDIS_ERR;
}
for (p = servinfo; p != NULL; p = p->ai_next) {
if ((s = socket(p->ai_family,p->ai_socktype,p->ai_protocol)) == -1)
continue;
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) {
char buf[128];
snprintf(buf,sizeof(buf),"Can't resolve: %s", addr);
__redisSetError(c,REDIS_ERR_OTHER,buf);
close(s);
return REDIS_ERR;
if (redisSetBlocking(c,s,0) != REDIS_OK)
goto error;
if (connect(s,p->ai_addr,p->ai_addrlen) == -1) {
if (errno == EINPROGRESS && !blocking) {
/* This is ok. */
} else {
if (redisContextWaitReady(c,s,timeout) != REDIS_OK)
goto error;
}
}
memcpy(&sa.sin_addr, he->h_addr, sizeof(struct in_addr));
if (blocking && redisSetBlocking(c,s,1) != REDIS_OK)
goto error;
if (redisSetTcpNoDelay(c,s) != REDIS_OK)
goto error;
c->fd = s;
c->flags |= REDIS_CONNECTED;
rv = REDIS_OK;
goto end;
}
if (p == NULL) {
char buf[128];
snprintf(buf,sizeof(buf),"Can't create socket: %s",strerror(errno));
__redisSetError(c,REDIS_ERR_OTHER,buf);
goto error;
}
if (connect(s, (struct sockaddr*)&sa, sizeof(sa)) == -1) {
if (errno == EINPROGRESS && !blocking) {
/* This is ok. */
} else {
if (redisContextWaitReady(c,s,timeout) != REDIS_OK)
return REDIS_ERR;
}
}
/* Reset socket to be blocking after connect(2). */
if (blocking && redisSetBlocking(c,s,1) != REDIS_OK)
return REDIS_ERR;
if (redisSetTcpNoDelay(c,s) != REDIS_OK)
return REDIS_ERR;
c->fd = s;
c->flags |= REDIS_CONNECTED;
return REDIS_OK;
error:
rv = REDIS_ERR;
end:
freeaddrinfo(servinfo);
return rv; // Need to return REDIS_OK if alright
}
int redisContextConnectUnix(redisContext *c, const char *path, struct timeval *timeout) {