[PATCH/RFC] daemon.c: replace inet_ntop with getnameinfo

[Benjamin Kramer <benny.kra@googlemail.com>]

git daemon's interpolated paths didn't support IPv6.
Every IPv6 address was being converted to `0.0.0.0'.

Fix this by replacing inet_ntop(3) with the protocol
agnostic getnameinfo(3) API.

Signed-off-by: Benjamin Kramer <benny.kra@googlemail.com>
---

With this patch we'll have colons in the per-IP directories
for IPv6 addresses. Creating files with a : in the name fails
on some OSes (e.g. Windows).

Is this OK for git or do we need to special case IPv6 addresses?

 daemon.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/daemon.c b/daemon.c
index daa4c8e..339d7ab 100644
--- a/daemon.c
+++ b/daemon.c
@@ -446,17 +446,15 @@ static void parse_extra_args(char *extra_args, int buflen)
 		struct addrinfo hints;
 		struct addrinfo *ai;
 		int gai;
-		static char addrbuf[HOST_NAME_MAX + 1];
+		static char addrbuf[NI_MAXHOST];
 
 		memset(&hints, 0, sizeof(hints));
 		hints.ai_flags = AI_CANONNAME;
 
 		gai = getaddrinfo(hostname, 0, &hints, &ai);
 		if (!gai) {
-			struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
-
-			inet_ntop(AF_INET, &sin_addr->sin_addr,
-				  addrbuf, sizeof(addrbuf));
+			getnameinfo(ai->ai_addr, ai->ai_addrlen, addrbuf,
+				    sizeof(addrbuf), NULL, 0, NI_NUMERICHOST);
 			free(ip_address);
 			ip_address = xstrdup(addrbuf);
 
-- 
1.6.3.1.g882bf