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-rw-r--r--src/network/gethostbyaddr.c21
-rw-r--r--src/network/gethostbyname2.c21
2 files changed, 32 insertions, 10 deletions
diff --git a/src/network/gethostbyaddr.c b/src/network/gethostbyaddr.c
index 51e1c569..c9b6388a 100644
--- a/src/network/gethostbyaddr.c
+++ b/src/network/gethostbyaddr.c
@@ -3,13 +3,24 @@
#include <netdb.h>
#include <string.h>
#include <netinet/in.h>
+#include <errno.h>
+#include <stdlib.h>
struct hostent *gethostbyaddr(const void *a, socklen_t l, int af)
{
- static struct hostent h;
- static long buf[512/sizeof(long)];
+ static struct hostent *h;
+ size_t size = 63;
struct hostent *res;
- if (gethostbyaddr_r(a, l, af, &h,
- (void *)buf, sizeof buf, &res, &h_errno)) return 0;
- return &h;
+ int err;
+ do {
+ free(h);
+ h = malloc(size+=size+1);
+ if (!h) {
+ h_errno = NO_RECOVERY;
+ return 0;
+ }
+ err = gethostbyaddr_r(a, l, af, h,
+ (void *)(h+1), size-sizeof *h, &res, &h_errno);
+ } while (err == ERANGE);
+ return err ? 0 : h;
}
diff --git a/src/network/gethostbyname2.c b/src/network/gethostbyname2.c
index 9fbe2647..c9f90da2 100644
--- a/src/network/gethostbyname2.c
+++ b/src/network/gethostbyname2.c
@@ -4,13 +4,24 @@
#include <netdb.h>
#include <string.h>
#include <netinet/in.h>
+#include <errno.h>
+#include <stdlib.h>
struct hostent *gethostbyname2(const char *name, int af)
{
- static struct hostent h;
- static long buf[512/sizeof(long)];
+ static struct hostent *h;
+ size_t size = 63;
struct hostent *res;
- if (gethostbyname2_r(name, af, &h,
- (void *)buf, sizeof buf, &res, &h_errno)) return 0;
- return &h;
+ int err;
+ do {
+ free(h);
+ h = malloc(size+=size+1);
+ if (!h) {
+ h_errno = NO_RECOVERY;
+ return 0;
+ }
+ err = gethostbyname2_r(name, af, h,
+ (void *)(h+1), size-sizeof *h, &res, &h_errno);
+ } while (err == ERANGE);
+ return err ? 0 : h;
}