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connect: fix invalid "Network is unreachable" errors 

Sometimes, in systems with both ipv4 and ipv6 addresses but where the
network doesn't support ipv6, Curl_is_connected returns an error
(intermittently) even if the ipv4 socket connects successfully.

This happens because there's a for-loop that iterates on the sockets but
the error variable is not resetted when the ipv4 is checked and is ok.

This patch fixes this problem by setting error to 0 when checking the
second socket and not having a result yet.

Fixes #794
This commit is contained in:
Antonio Larrosa 2016-05-05 19:50:15 +02:00 committed by Daniel Stenberg
parent befa21f2cd
commit ae8f662072
1 changed files with 1 additions and 0 deletions
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lib/connect.c
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@ -764,6 +764,7 @@ CURLcode Curl_is_connected(struct connectdata *conn,
rc = Curl_socket_ready(CURL_SOCKET_BAD, conn->tempsock[i], 0);
if(rc == 0) { /* no connection yet */
error = 0;
if(curlx_tvdiff(now, conn->connecttime) >= conn->timeoutms_per_addr) {
infof(data, "After %ldms connect time, move on!\n",
conn->timeoutms_per_addr);