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httpd: fix address family for reverse proxy client socket

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When httpd proxies a request to another server, it first creates
an AF_INET socket, then resolves the server name to a sockaddr,
then connects to it. This fails if the server name resolves to
an IPv6 address.

This patch ensures that the socket is created with the correct
address family (AF_INET6 if the server resolves to an IPv6 address
and AF_INET otherwise).

Signed-off-by: Laurent Bercot <ska-dietlibc@skarnet.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Laurent Bercot 2017-01-06 22:03:08 +01:00 committed by Denys Vlasenko
parent 4d06b31453
commit 0ef478f01b
1 changed files with 3 additions and 3 deletions
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6
networking/httpd.c
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@ -2396,12 +2396,12 @@ static void handle_incoming_and_exit(const len_and_sockaddr *fromAddr)
int proxy_fd;
len_and_sockaddr *lsa;
proxy_fd = socket(AF_INET, SOCK_STREAM, 0);
if (proxy_fd < 0)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
lsa = host2sockaddr(proxy_entry->host_port, 80);
if (lsa == NULL)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
proxy_fd = socket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
if (proxy_fd < 0)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
if (connect(proxy_fd, &lsa->u.sa, lsa->len) < 0)
send_headers_and_exit(HTTP_INTERNAL_SERVER_ERROR);
fdprintf(proxy_fd, "%s %s%s%s%s HTTP/%c.%c\r\n",