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Fixed glibc crash problems with libnss_wins.so

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Jeremy.
(This used to be commit c38a465bef91bc54cd3f3ce81e5a9c818f429801)
This commit is contained in:
Jeremy Allison 2001-05-15 21:53:19 +00:00
parent 218f514d27
commit 199bb03916
1 changed files with 44 additions and 4 deletions
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48
source3/nsswitch/wins.c
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@ -31,6 +31,39 @@ extern int DEBUGLEVEL;
#define INADDRSZ 4
#endif
/* Use our own create socket code so we don't recurse.... */
static int wins_lookup_open_socket_in(void)
{
struct sockaddr_in sock;
int val=1;
int res;
memset((char *)&sock,'\0',sizeof(sock));
#ifdef HAVE_SOCK_SIN_LEN
sock.sin_len = sizeof(sock);
#endif
sock.sin_port = 0;
sock.sin_family = AF_INET;
sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
res = socket(AF_INET, SOCK_DGRAM, 0);
if (res == -1)
return -1;
setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
#ifdef SO_REUSEPORT
setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
#endif /* SO_REUSEPORT */
/* now we've got a socket - we need to bind it */
if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0)
return(-1);
return res;
}
struct in_addr *lookup_backend(const char *name, int *count)
{
int fd;
@ -51,8 +84,9 @@ struct in_addr *lookup_backend(const char *name, int *count)
*count = 0;
fd = open_socket_in(SOCK_DGRAM,0, 3, interpret_addr("0.0.0.0"), True);
if (fd == -1) return NULL;
fd = wins_lookup_open_socket_in();
if (fd == -1)
return NULL;
set_socket_options(fd,"SO_BROADCAST");
@ -85,6 +119,7 @@ struct in_addr *lookup_backend(const char *name, int *count)
}
out:
close(fd);
return ret;
}
@ -102,13 +137,14 @@ _nss_wins_gethostbyname_r(const char *name, struct hostent *he,
char **host_addresses;
struct in_addr *ip_list;
int i, count;
size_t namelen = strlen(name) + 1;
ip_list = lookup_backend(name, &count);
if (!ip_list) {
return NSS_STATUS_NOTFOUND;
}
if (buflen < (2*count+1)*INADDRSZ) {
if (buflen < namelen + (2*count+1)*INADDRSZ) {
/* no ENOMEM error type?! */
return NSS_STATUS_NOTFOUND;
}
@ -130,7 +166,11 @@ _nss_wins_gethostbyname_r(const char *name, struct hostent *he,
host_addresses++;
}
if (ip_list) free(ip_list);
if (ip_list)
free(ip_list);
memcpy(buffer, name, namelen);
he->h_name = buffer;
return NSS_STATUS_SUCCESS;
}