allocate 64K recieve buffer for DNS responses.

1 files changed, 33 insertions, 18 deletions

diff --git a/src/lib/libc/net/getaddrinfo.c b/src/lib/libc/net/getaddrinfo.c
index db15e62668..915286a404 100644
--- a/src/lib/libc/net/getaddrinfo.c
+++ b/src/lib/libc/net/getaddrinfo.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: getaddrinfo.c,v 1.42 2002/08/22 16:35:37 itojun Exp $ */
+/*      $OpenBSD: getaddrinfo.c,v 1.43 2002/08/27 08:53:13 itojun Exp $ */
 /*      $KAME: getaddrinfo.c,v 1.31 2000/08/31 17:36:43 itojun Exp $    */
 
 /*
@@ -181,11 +181,7 @@ static const struct explore explore[] = {
 #define PTON_MAX        4
 #endif
 
-#if PACKETSZ > 1024
-#define MAXPACKET       PACKETSZ
-#else
-#define MAXPACKET       1024
-#endif
+#define MAXPACKET       (64*1024)
 
 typedef union {
         HEADER hdr;
@@ -1230,7 +1226,7 @@ _dns_getaddrinfo(name, pai)
         const struct addrinfo *pai;
 {
         struct addrinfo *ai;
-        querybuf buf, buf2;
+        querybuf *buf, *buf2;
         struct addrinfo sentinel, *cur;
         struct res_target q, q2;
 
@@ -1239,47 +1235,66 @@ _dns_getaddrinfo(name, pai)
         memset(&sentinel, 0, sizeof(sentinel));
         cur = &sentinel;
 
+        buf = malloc(sizeof(*buf));
+        if (buf == NULL) {
+                h_errno = NETDB_INTERNAL;
+                return NULL;
+        }
+        buf2 = malloc(sizeof(*buf2));
+        if (buf2 == NULL) {
+                free(buf);
+                h_errno = NETDB_INTERNAL;
+                return NULL;
+        }
+
         switch (pai->ai_family) {
         case AF_UNSPEC:
                 /* prefer IPv6 */
                 q.qclass = C_IN;
                 q.qtype = T_AAAA;
-                q.answer = buf.buf;
-                q.anslen = sizeof(buf);
+                q.answer = buf->buf;
+                q.anslen = sizeof(buf->buf);
                 q.next = &q2;
                 q2.qclass = C_IN;
                 q2.qtype = T_A;
-                q2.answer = buf2.buf;
-                q2.anslen = sizeof(buf2);
+                q2.answer = buf2->buf;
+                q2.anslen = sizeof(buf2->buf);
                 break;
         case AF_INET:
                 q.qclass = C_IN;
                 q.qtype = T_A;
-                q.answer = buf.buf;
-                q.anslen = sizeof(buf);
+                q.answer = buf->buf;
+                q.anslen = sizeof(buf->buf);
                 break;
         case AF_INET6:
                 q.qclass = C_IN;
                 q.qtype = T_AAAA;
-                q.answer = buf.buf;
-                q.anslen = sizeof(buf);
+                q.answer = buf->buf;
+                q.anslen = sizeof(buf->buf);
                 break;
         default:
+                free(buf);
+                free(buf2);
                 return NULL;
         }
-        if (res_searchN(name, &q) < 0)
+        if (res_searchN(name, &q) < 0) {
+                free(buf);
+                free(buf2);
                 return NULL;
-        ai = getanswer(&buf, q.n, q.name, q.qtype, pai);
+        }
+        ai = getanswer(buf, q.n, q.name, q.qtype, pai);
         if (ai) {
                 cur->ai_next = ai;
                 while (cur && cur->ai_next)
                         cur = cur->ai_next;
         }
         if (q.next) {
-                ai = getanswer(&buf2, q2.n, q2.name, q2.qtype, pai);
+                ai = getanswer(buf2, q2.n, q2.name, q2.qtype, pai);
                 if (ai)
                         cur->ai_next = ai;
         }
+        free(buf);
+        free(buf2);
         return sentinel.ai_next;
 }