Add IPv6 support by implementing name resolution with the
protocol agnostic getaddrinfo(3) API. The old gethostbyname(3)
code is still available when git is compiled with NO_IPV6.
Signed-off-by: Benjamin Kramer <benny.kra@xxxxxxxxxxxxxx>
---
imap-send.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 51 insertions(+), 3 deletions(-)
diff --git a/imap-send.c b/imap-send.c
index 8154cb2..861268a 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -982,9 +982,7 @@ static struct store *imap_open_store(struct imap_server_conf *srvc)
struct imap_store *ctx;
struct imap *imap;
char *arg, *rsp;
- struct hostent *he;
- struct sockaddr_in addr;
- int s, a[2], preauth;
+ int s = -1, a[2], preauth;
pid_t pid;
ctx = xcalloc(sizeof(*ctx), 1);
@@ -1021,6 +1019,51 @@ static struct store *imap_open_store(struct imap_server_conf *srvc)
imap_info("ok\n");
} else {
+#ifndef NO_IPV6
+ struct addrinfo hints, *ai0, *ai;
+ int gai;
+ char portstr[6];
+
+ snprintf(portstr, sizeof(portstr), "%hu", srvc->port);
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = IPPROTO_TCP;
+
+ imap_info("Resolving %s... ", srvc->host);
+ gai = getaddrinfo(srvc->host, portstr, &hints, &ai);
+ if (gai) {
+ fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(gai));
+ goto bail;
+ }
+ imap_info("ok\n");
+
+ for (ai0 = ai; ai; ai = ai->ai_next) {
+ char addr[NI_MAXHOST];
+
+ s = socket(ai->ai_family, ai->ai_socktype,
+ ai->ai_protocol);
+ if (s < 0)
+ continue;
+
+ getnameinfo(ai->ai_addr, ai->ai_addrlen, addr,
+ sizeof(addr), NULL, 0, NI_NUMERICHOST);
+ imap_info("Connecting to [%s]:%s... ", addr, portstr);
+
+ if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0) {
+ close(s);
+ s = -1;
+ perror("connect");
+ continue;
+ }
+
+ break;
+ }
+ freeaddrinfo(ai0);
+#else /* NO_IPV6 */
+ struct hostent *he;
+ struct sockaddr_in addr;
+
memset(&addr, 0, sizeof(addr));
addr.sin_port = htons(srvc->port);
addr.sin_family = AF_INET;
@@ -1040,7 +1083,12 @@ static struct store *imap_open_store(struct imap_server_conf *srvc)
imap_info("Connecting to %s:%hu... ", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
if (connect(s, (struct sockaddr *)&addr, sizeof(addr))) {
close(s);
+ s = -1;
perror("connect");
+ }
+#endif
+ if (s < 0) {
+ fputs("Error: unable to connect to server.\n", stderr);
goto bail;
}
--
1.6.3.1.153.g63801e
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