diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/hostip6.c | 51 |
1 files changed, 26 insertions, 25 deletions
diff --git a/lib/hostip6.c b/lib/hostip6.c index dde22d1b1..0d63f7224 100644 --- a/lib/hostip6.c +++ b/lib/hostip6.c @@ -233,40 +233,41 @@ Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn, char sbuf[NI_MAXSERV]; char *sbufptr = NULL; char addrbuf[128]; - curl_socket_t s; int pf; struct SessionHandle *data = conn->data; *waitp=0; /* don't wait, we have the response now */ - /* see if we have an IPv6 stack */ - s = socket(PF_INET6, SOCK_DGRAM, 0); - if(s == CURL_SOCKET_BAD) { - /* Some non-IPv6 stacks have been found to make very slow name resolves - * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if - * the stack seems to be a non-ipv6 one. */ - + /* + * Check if a limited name resolve has been requested. + */ + switch(data->set.ip_version) { + case CURL_IPRESOLVE_V4: pf = PF_INET; + break; + case CURL_IPRESOLVE_V6: + pf = PF_INET6; + break; + default: + pf = PF_UNSPEC; + break; } - else { - /* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest - * possible checks. And close the socket again. - */ - sclose(s); - /* - * Check if a more limited name resolve has been requested. - */ - switch(data->set.ip_version) { - case CURL_IPRESOLVE_V4: + if (pf != PF_INET) { + /* see if we have an IPv6 stack */ + curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0); + if(s == CURL_SOCKET_BAD) { + /* Some non-IPv6 stacks have been found to make very slow name resolves + * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if + * the stack seems to be a non-ipv6 one. */ + pf = PF_INET; - break; - case CURL_IPRESOLVE_V6: - pf = PF_INET6; - break; - default: - pf = PF_UNSPEC; - break; + } + else { + /* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest + * possible checks. And close the socket again. + */ + sclose(s); } } |