diff options
Diffstat (limited to 'lib/net.c')
| -rw-r--r-- | lib/net.c | 15 |
1 files changed, 10 insertions, 5 deletions
@@ -16,7 +16,7 @@ void xsetsockopt(int fd, int level, int opt, void *val, socklen_t len) int xconnect(char *host, char *port, int family, int socktype, int protocol, int flags) { - struct addrinfo info, *ai; + struct addrinfo info, *ai, *ai2; int fd; memset(&info, 0, sizeof(struct addrinfo)); @@ -26,14 +26,19 @@ int xconnect(char *host, char *port, int family, int socktype, int protocol, info.ai_flags = flags; fd = getaddrinfo(host, port, &info, &ai); - if (fd || !ai) error_exit("Connect '%s%s%s': %s", host, port ? ":" : "", port ? port : "", fd ? gai_strerror(fd) : "not found"); - fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); - if (connect(fd, ai->ai_addr, ai->ai_addrlen)) perror_exit("connect"); - freeaddrinfo(ai); + // Try all the returned addresses. Report errors if last entry can't connect. + for (ai2 = ai; ai; ai = ai->ai_next) { + fd = (ai->ai_next ? socket : xsocket)(ai->ai_family, ai->ai_socktype, + ai->ai_protocol); + if (!connect(fd, ai->ai_addr, ai->ai_addrlen)) break; + else if (!ai2->ai_next) perror_exit("connect"); + close(fd); + } + freeaddrinfo(ai2); return fd; } |