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authorUlrich Drepper <drepper@redhat.com>2002-10-17 21:51:21 +0000
committerUlrich Drepper <drepper@redhat.com>2002-10-17 21:51:21 +0000
commit0420d8885a4889dca3b874c934fd5f42f2e99e5f (patch)
treedd8aecefe9a5f21d26df11cbc7f9c1dc6f2f5fd9 /resolv/gethnamaddr.c
parentd025fe269abcab6903b3973d193a8678228301e8 (diff)
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Update.
2002-10-15 Jakub Jelinek <jakub@redhat.com> * include/resolv.h (__libc_res_nquery, __libc_res_nsearch, __libc_res_nsend): New prototypes. * resolv/res_query.c (QUERYSIZE): Define. (__libc_res_nquery): Renamed from res_nquery. Added answerp argument. Allocate only QUERYSIZE bytes first, if res_nmkquery fails use MAXPACKET buffer. Call __libc_res_nsend instead of res_nsend, pass answerp. (res_nquery): Changed into wrapper around __libc_res_nquery. (__libc_res_nsearch): Renamed from res_nsearch. Added answerp argument. Call __libc_res_nquerydomain and __libc_res_nquery instead of the non-__libc_ variants, pass them answerp. (res_nsearch): Changed into wrapper around __libc_res_nsearch. (__libc_res_nquerydomain): Renamed from res_nquerydomain. Added answerp argument. Call __libc_res_nquery instead of res_nquery, pass answerp. (res_nquerydomain): Changed into wrapper around __libc_res_nquerydomain. * resolv/res_send.c: Include sys/ioctl.h. (MAXPACKET): Define. (send_vc): Change arguments. Reallocate answer buffer if it is too small. (send_dg): Likewise. (__libc_res_nsend): Renamed from res_nsend. Added ansp argument. Reallocate answer buffer if it is too small and hooks are in use. Adjust calls to send_vc and send_dg. (res_nsend): Changed into wrapper around __libc_res_nsend. * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname2_r): Allocate just 1K answer buffer on the stack, use __libc_res_nsearch instead of res_nsearch. (_nss_dns_gethostbyaddr_r): Similarly with __libc_res_nquery. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyaddr_r): Likewise. (_nss_dns_getnetbyname_r): Similarly with __libc_res_nsearch. * resolv/gethnamaddr.c (gethostbyname2): Likewise. (gethostbyaddr): Similarly with __libc_res_nquery. * resolv/Versions (libresolv): Export __libc_res_nquery and __libc_res_nsearch at GLIBC_PRIVATE.
Diffstat (limited to 'resolv/gethnamaddr.c')
-rw-r--r--resolv/gethnamaddr.c46
1 files changed, 18 insertions, 28 deletions
diff --git a/resolv/gethnamaddr.c b/resolv/gethnamaddr.c
index 797af94874..e941b5c1ac 100644
--- a/resolv/gethnamaddr.c
+++ b/resolv/gethnamaddr.c
@@ -510,10 +510,10 @@ gethostbyname2(name, af)
const char *name;
int af;
{
- querybuf *buf;
+ querybuf *buf, *origbuf;
register const char *cp;
char *bp;
- int n, size, type, len, use_malloc = 0;
+ int n, size, type, len;
struct hostent *ret;
extern struct hostent *_gethtbyname2();
@@ -616,24 +616,19 @@ gethostbyname2(name, af)
break;
}
- if (!__libc_use_alloca (MAXPACKET)) {
- buf = (querybuf *) malloc (sizeof (*buf));
- if (buf == NULL) {
- __set_h_errno (NETDB_INTERNAL);
- return NULL;
- }
- use_malloc = 1;
- } else
- buf = (querybuf *) alloca (sizeof (*buf));
+ buf = origbuf = (querybuf *) alloca (1024);
- if ((n = res_nsearch(&_res, name, C_IN, type, buf->buf, sizeof(buf->buf))) < 0) {
+ if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf->buf, 1024,
+ (u_char **) &buf)) < 0) {
+ if (buf != origbuf)
+ free (buf);
dprintf("res_nsearch failed (%d)\n", n);
if (errno == ECONNREFUSED)
return (_gethtbyname2(name, af));
return (NULL);
}
ret = getanswer(buf, n, name, type);
- if (use_malloc)
+ if (buf != origbuf)
free (buf);
return ret;
}
@@ -647,9 +642,9 @@ gethostbyaddr(addr, len, af)
const u_char *uaddr = (const u_char *)addr;
static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
- int n, use_malloc = 0;
+ int n;
socklen_t size;
- querybuf *buf;
+ querybuf *buf, *orig_buf;
register struct hostent *hp;
char qbuf[MAXDNAME+1], *qp = NULL;
#ifdef SUNSECURITY
@@ -711,23 +706,18 @@ gethostbyaddr(addr, len, af)
abort();
}
- if (!__libc_use_alloca (MAXPACKET)) {
- buf = (querybuf *) malloc (sizeof (*buf));
- if (buf == NULL) {
- __set_h_errno (NETDB_INTERNAL);
- return NULL;
- }
- use_malloc = 1;
- } else
- buf = (querybuf *) alloca (sizeof (*buf));
+ buf = orig_buf = (querybuf *) alloca (1024);
- n = res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf, sizeof buf->buf);
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf, 1024,
+ (u_char **) &buf);
if (n < 0 && af == AF_INET6) {
strcpy(qp, "ip6.int");
- n = res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf, sizeof buf->buf);
+ n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf->buf,
+ buf != orig_buf ? MAXPACKET : 1024,
+ (u_char **) &buf);
}
if (n < 0) {
- if (use_malloc)
+ if (buf != orig_buf)
free (buf);
dprintf("res_nquery failed (%d)\n", n);
if (errno == ECONNREFUSED)
@@ -735,7 +725,7 @@ gethostbyaddr(addr, len, af)
return (NULL);
}
hp = getanswer(buf, n, qbuf, T_PTR);
- if (use_malloc)
+ if (buf != orig_buf)
free (buf);
if (!hp)
return (NULL); /* h_errno was set by getanswer() */