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Diffstat (limited to 'lib/libc/net/getnetbydns.c')
-rw-r--r--lib/libc/net/getnetbydns.c160
1 files changed, 77 insertions, 83 deletions
diff --git a/lib/libc/net/getnetbydns.c b/lib/libc/net/getnetbydns.c
index 92d1d4aa5204..6b3eb44a3011 100644
--- a/lib/libc/net/getnetbydns.c
+++ b/lib/libc/net/getnetbydns.c
@@ -50,13 +50,6 @@
* -
* --Copyright--
*/
-/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
- * Dep. Matematica Universidade de Coimbra, Portugal, Europe
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- */
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
@@ -68,23 +61,19 @@ static char rcsid[] = "$Id: getnetbydns.c,v 1.3 1995/05/30 05:40:46 rgrimes Exp
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
-
-#include <stdio.h>
#include <netdb.h>
#include <resolv.h>
+#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
-#include <unistd.h>
#include <syslog.h>
-#include "res_config.h"
+#define BYNAME 0
+#define BYADDR 1
-extern int h_errno;
-
-#define BYADDR 0
-#define BYNAME 1
#define MAXALIASES 35
+#define MAXADDRS 35
#if PACKETSZ > 1024
#define MAXPACKET PACKETSZ
@@ -93,15 +82,17 @@ extern int h_errno;
#endif
typedef union {
- HEADER hdr;
- u_char buf[MAXPACKET];
+ HEADER hdr;
+ u_char buf[MAXPACKET];
} querybuf;
typedef union {
- long al;
- char ac;
+ int32_t al;
+ char ac;
} align;
+extern int h_errno;
+
static struct netent *
getnetanswer(answer, anslen, net_i)
querybuf *answer;
@@ -109,15 +100,20 @@ getnetanswer(answer, anslen, net_i)
int net_i;
{
- register HEADER *hp;
- register u_char *cp;
- register int n;
- u_char *eom;
- int type, class, buflen, ancount, qdcount, haveanswer, i, nchar;
- char aux1[30], aux2[30], ans[30], *in, *st, *pauxt, *bp, **ap,
- *paux1 = &aux1[0], *paux2 = &aux2[0], flag = 0;
-static struct netent net_entry;
-static char *net_aliases[MAXALIASES], netbuf[BUFSIZ+1];
+ register HEADER *hp;
+ register u_char *cp;
+ register int n;
+ u_char *eom;
+ int type, class, buflen, ancount, qdcount,
+ haveanswer, i, nchar;
+ char aux1[30], aux2[30], ans[30],
+ *in, *st, *pauxt, *bp, **ap,
+ *paux1 = &aux1[0],
+ *paux2 = &aux2[0],
+ flag = 0;
+static struct netent net_entry;
+static char *net_aliases[MAXALIASES],
+ netbuf[BUFSIZ+1];
/*
* find first satisfactory answer
@@ -145,10 +141,12 @@ static char *net_aliases[MAXALIASES], netbuf[BUFSIZ+1];
h_errno = HOST_NOT_FOUND;
else
h_errno = TRY_AGAIN;
- return (NULL);
+
+ return ((struct netent *) NULL);
}
- while (qdcount-- > 0)
+ while (qdcount-- > 0){
cp += __dn_skipname(cp, eom) + QFIXEDSZ;
+ }
ap = net_aliases;
*ap = NULL;
net_entry.n_aliases = net_aliases;
@@ -170,26 +168,27 @@ static char *net_aliases[MAXALIASES], netbuf[BUFSIZ+1];
cp += n;
return (NULL);
}
- cp += n;
+ cp += n;
*ap++ = bp;
- bp += strlen(bp) + 1;
- net_entry.n_addrtype =
- (class == C_IN) ? AF_INET : AF_UNSPEC;
+ bp += (strlen(bp) + 1);
+ net_entry.n_addrtype = (class == C_IN)
+ ? AF_INET
+ : AF_UNSPEC;
haveanswer++;
}
}
if (haveanswer) {
*ap = NULL;
switch (net_i) {
- case BYADDR:
+ case BYADDR :
net_entry.n_name = *net_entry.n_aliases;
net_entry.n_net = 0L;
break;
- case BYNAME:
+ case BYNAME :
in = *net_entry.n_aliases;
net_entry.n_name = &ans[0];
aux2[0] = '\0';
- for (i = 0; i < 4; i++) {
+ for (i = 0; i < 4; i++) {
for (st = in, nchar = 0;
*st != '.';
st++, nchar++)
@@ -197,23 +196,23 @@ static char *net_aliases[MAXALIASES], netbuf[BUFSIZ+1];
if (nchar != 1 || *in != '0' || flag) {
flag = 1;
(void)strncpy(paux1,
- (i==0) ? in : in-1,
- (i==0) ?nchar : nchar+1);
- paux1[(i==0) ? nchar : nchar+1] = '\0';
+ (i==0) ?in :in-1,
+ (i==0) ?nchar :nchar+1);
+ paux1[(i==0) ?nchar :nchar+1] = '\0';
pauxt = paux2;
paux2 = strcat(paux1, paux2);
paux1 = pauxt;
}
in = ++st;
- }
+ }
net_entry.n_net = inet_network(paux2);
- break;
}
net_entry.n_aliases++;
return (&net_entry);
+ } else {
+ h_errno = TRY_AGAIN;
+ return ((struct netent *) NULL);
}
- h_errno = TRY_AGAIN;
- return (NULL);
}
struct netent *
@@ -221,40 +220,41 @@ _getnetbydnsaddr(net, net_type)
register long net;
register int net_type;
{
- unsigned int netbr[4];
- int nn, anslen;
- querybuf buf;
- char qbuf[MAXDNAME];
- unsigned long net2;
- struct netent *net_entry;
+ unsigned int netbr[4];
+ int nn, anslen;
+ querybuf buf;
+ char qbuf[MAXDNAME];
+ unsigned long net2;
+ struct netent *net_entry;
if (net_type != AF_INET)
return (NULL);
- for (nn = 4, net2 = net; net2; net2 >>= 8)
+ for (nn = 4, net2 = net; net2; net2 >>= 8) {
netbr[--nn] = net2 & 0xff;
+ }
switch (nn) {
- case 3: /* Class A */
- sprintf(qbuf, "0.0.0.%u.in-addr.arpa", netbr[3]);
- break;
- case 2: /* Class B */
- sprintf(qbuf, "0.0.%u.%u.in-addr.arpa", netbr[3], netbr[2]);
- break;
- case 1: /* Class C */
- sprintf(qbuf, "0.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2],
- netbr[1]);
- break;
- case 0: /* Class D - E */
- sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa", netbr[3], netbr[2],
- netbr[1], netbr[0]);
- break;
+ case 3: /* Class A */
+ (void)sprintf(qbuf, "0.0.0.%u.in-addr.arpa",
+ netbr[3]);
+ break;
+ case 2: /* Class B */
+ (void)sprintf(qbuf, "0.0.%u.%u.in-addr.arpa",
+ netbr[3], netbr[2]);
+ break;
+ case 1: /* Class C */
+ (void)sprintf(qbuf, "0.%u.%u.%u.in-addr.arpa",
+ netbr[3], netbr[2], netbr[1]);
+ break;
+ case 0: /* Class D - E */
+ (void)sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
+ netbr[3], netbr[2], netbr[1], netbr[0]);
+ break;
}
- anslen = res_query(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf));
+ anslen = res_query(qbuf, C_IN, T_PTR, buf.buf, sizeof buf.buf);
if (anslen < 0) {
-#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
-#endif
return (NULL);
}
net_entry = getnetanswer(&buf, anslen, BYADDR);
@@ -262,34 +262,28 @@ _getnetbydnsaddr(net, net_type)
unsigned u_net = net; /* maybe net should be unsigned ? */
/* Strip trailing zeros */
- while ((u_net & 0xff) == 0 && u_net != 0)
+ while ((u_net & 0xff) == 0 && u_net != 0) {
u_net >>= 8;
+ }
net_entry->n_net = u_net;
- return (net_entry);
}
- return (NULL);
+ return (net_entry);
}
struct netent *
_getnetbydnsname(net)
register const char *net;
{
- int anslen;
- querybuf buf;
- char qbuf[MAXDNAME];
+ int anslen;
+ querybuf buf;
+ char qbuf[MAXDNAME];
- if ((_res.options & RES_INIT) == 0 && res_init() == -1) {
- h_errno = NETDB_INTERNAL;
- return (NULL);
- }
- strcpy(&qbuf[0], net);
- anslen = res_search(qbuf, C_IN, T_PTR, (u_char *)&buf, sizeof(buf));
+ (void)strcpy(&qbuf[0],net);
+ anslen = res_search(qbuf, C_IN, T_PTR, buf.buf, sizeof buf.buf);
if (anslen < 0) {
-#ifdef DEBUG
if (_res.options & RES_DEBUG)
printf("res_query failed\n");
-#endif
- return (NULL);
+ return NULL;
}
return getnetanswer(&buf, anslen, BYNAME);
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 23:01:34 +0000