proxy_gethostbyname(): fix failure to omit DNS lookup for ipv4 addrs

gethostbyname() is specified to transform simple numeric ipv4 addresses
into their binary form. since proxy_gethostbyname() was used as a
backend for all resolver functions, somehow we assumed the check for
an ipv4 was done from another site, however this didn't hold true when
the caller used gethostbyname() directly.

fixes #347

1 files changed, 5 insertions, 0 deletions

diff --git a/src/core.c b/src/core.c
index 4226a7e..59d07de 100644
--- a/src/core.c
+++ b/src/core.c
@@ -849,6 +849,11 @@ struct hostent *proxy_gethostbyname(const char *name, struct gethostbyname_data*
 	data->hostent_space.h_addrtype = AF_INET;
 	data->hostent_space.h_length = sizeof(in_addr_t);
 
+	if(pc_isnumericipv4(name)) {
+		data->resolved_addr = inet_addr(name);
+		goto retname;
+	}
+
 	gethostname(buff, sizeof(buff));
 
 	if(!strcmp(buff, name)) {