From 94ad2437020038b022ce19b8b8b35f1cc86b16f6 Mon Sep 17 00:00:00 2001 From: Benjamin Kramer Date: Mon, 25 May 2009 21:13:54 +0200 Subject: [PATCH] imap-send: add support for IPv6 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 Signed-off-by: Junio C Hamano --- imap-send.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 51 insertions(+), 3 deletions(-) diff --git a/imap-send.c b/imap-send.c index 8154cb211..e4c83b9d5 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; } -- 2.26.2