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authorRoland McGrath <roland@gnu.org>1995-08-22 22:47:57 +0000
committerRoland McGrath <roland@gnu.org>1995-08-22 22:47:57 +0000
commit3cf595e562f955e399d80ea9d053e41d50469e6b (patch)
tree77ed930262ae9606543c580c4a3d69141c1bd561 /resolv/gethnamaddr.c
parent207eb76afba6503af9c4ab5711bfd76f9697c1ad (diff)
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Tue Aug 22 16:49:12 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* inet/netdb.h: Moved to resolv. * inet/Makefile (headers): Remove netdb.h. * resolv/Makefile (headers): Add netdb.h. * resolv/gethnamaddr.c, resolv/inet_addr.c, resolv/netdb.h, resolv/res_send.c: Updated from BIND-4.9.3-BETA26. * hurd/thread-cancel.c: If SS->cancel_hook is not null, call it before resuming the thread. * hurd/hurd/signal.h (struct hurd_sigstate): New member `cancel_hook'. * hurd/Makefile: Removed dep on hurd/signal.h for RPC stub objects. Mon Aug 21 16:37:09 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/i386/dl-machine.h (elf_machine_rel): Grok R_386_NONE relocs, and do nothing. Why the linker generates them we may never know. * sysdeps/mach/hurd/i386/intr-msg.h: New file.
Diffstat (limited to 'resolv/gethnamaddr.c')
-rw-r--r--resolv/gethnamaddr.c82
1 files changed, 56 insertions, 26 deletions
diff --git a/resolv/gethnamaddr.c b/resolv/gethnamaddr.c
index d3b68f7..87b4db1 100644
--- a/resolv/gethnamaddr.c
+++ b/resolv/gethnamaddr.c
@@ -93,6 +93,7 @@ static const char AskedForGot[] =
"gethostby*.getanswer: asked for \"%s\", got \"%s\"";
static char *h_addr_ptrs[MAXADDRS + 1];
+static struct hostent *gethostbyname_ipv4 __P((const char *));
static struct hostent host;
static char *host_aliases[MAXALIASES];
@@ -156,7 +157,9 @@ getanswer(answer, anslen, qname, qclass, qtype)
int haveanswer, had_error;
int toobig = 0;
char tbuf[MAXDNAME+1];
+ const char *tname;
+ tname = qname;
host.h_name = NULL;
eom = answer->buf + anslen;
/*
@@ -249,19 +252,36 @@ getanswer(answer, anslen, qname, qclass, qtype)
buflen -= n;
continue;
}
+ if (qtype == T_PTR && type == T_CNAME) {
+ n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
+ if (n < 0) {
+ had_error++;
+ continue;
+ }
+ cp += n;
+ /* Get canonical name. */
+ n = strlen(tbuf) + 1; /* for the \0 */
+ if (n > buflen) {
+ had_error++;
+ continue;
+ }
+ strcpy(bp, tbuf);
+ tname = bp;
+ bp += n;
+ buflen -= n;
+ continue;
+ }
if (type != qtype) {
- /* CNAME->PTR should not cause a log message. */
- if (!(qtype == T_PTR && type == T_CNAME))
- syslog(LOG_NOTICE|LOG_AUTH,
+ syslog(LOG_NOTICE|LOG_AUTH,
"gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
- qname, p_class(qclass), p_type(qtype),
- p_type(type));
+ qname, p_class(qclass), p_type(qtype),
+ p_type(type));
cp += n;
continue; /* XXX - had_error++ ? */
}
switch (type) {
case T_PTR:
- if (strcasecmp(qname, bp) != 0) {
+ if (strcasecmp(tname, bp) != 0) {
syslog(LOG_NOTICE|LOG_AUTH,
AskedForGot, qname, bp);
cp += n;
@@ -377,6 +397,36 @@ struct hostent *
gethostbyname(name)
const char *name;
{
+ struct hostent *hp;
+
+#if defined(AF_INET6) && defined(RES_TRY_INET6)
+ if (_res.options & RES_TRY_INET6) {
+ hp = gethostbyname2(name, AF_INET6);
+ if (hp)
+ return (hp);
+ }
+#endif
+ return (gethostbyname2(name, AF_INET));
+}
+
+struct hostent *
+gethostbyname2(name, af)
+ const char *name;
+ int af;
+{
+ switch (af) {
+ case AF_INET:
+ return (gethostbyname_ipv4(name));
+ }
+ errno = EAFNOSUPPORT;
+ h_errno = NETDB_INTERNAL;
+ return (NULL);
+}
+
+static struct hostent *
+gethostbyname_ipv4(name)
+ const char *name;
+{
querybuf buf;
register const char *cp;
int n;
@@ -727,23 +777,3 @@ dn_skipname(comp_dn, eom)
return (__dn_skipname(comp_dn, eom));
}
#endif /*old-style libc with yp junk in it*/
-
-#ifdef ultrix
-/* more icky libc packaging in ultrix */
-int
-local_hostname_length(hostname)
- const char *hostname;
-{
- int len_host, len_domain;
-
- if (!*_res.defdname)
- res_init();
- len_host = strlen(hostname);
- len_domain = strlen(_res.defdname);
- if (len_host > len_domain &&
- !strcasecmp(hostname + len_host - len_domain, _res.defdname) &&
- hostname[len_host - len_domain - 1] == '.')
- return (len_host - len_domain - 1);
- return (0);
-}
-#endif