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authorFlorian Weimer <fweimer@redhat.com>2016-12-27 16:44:15 +0100
committerFlorian Weimer <fweimer@redhat.com>2016-12-27 16:44:15 +0100
commit5c6e6747356f5d473c2c62e818bc24432ddef3e2 (patch)
tree1621c0978cfba034ef116b036504d0f40fd73e1b /sunrpc/clnt_gen.c
parenta36451ff4142b63a76cea9e52ffe4687290071a4 (diff)
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sunrpc: Always obtain AF_INET addresses from NSS [BZ #20964]
The new __libc_rpc_gethostbyname function calls gethostbyname2_r with an AF_INET argument and is therefore not affected by the RES_USE_INET6 flag. Validated with the following test program, with and without RES_OPTIONS=inet6, against a NFS server. (Link with -lrpcsvc.) #include <rpc/clnt.h> #include <rpcsvc/mount.h> #include <stdio.h> #include <string.h> static void usage (char **argv) { printf ("usage:\n" " %1$s HOST getrpcport\n" " %1$s HOST callrpc\n" " %1$s HOST clnt_create\n", argv[0]); } static void dump_exports (struct exportnode *exports) { while (exports != NULL) { printf ("%s\n", exports->ex_dir); exports = exports->ex_next; } } int main (int argc, char **argv) { if (argc != 3) { usage (argv); return 1; } const char *host = argv[1]; const char *command = argv[2]; if (strcmp (command, "getrpcport") == 0) { int port = getrpcport (host, MOUNTPROG, MOUNTVERS, IPPROTO_UDP); printf ("getrpcport: %d\n", port); } else if (strcmp (command, "callrpc") == 0) { struct exportnode *exports = NULL; int ret = callrpc (host, MOUNTPROG, MOUNTVERS, MOUNTPROC_EXPORT, (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_exports, (char *)&exports); if (ret != 0) { clnt_perrno (ret); puts (""); return 1; } dump_exports (exports); } else if (strcmp (command, "clnt_create") == 0) { CLIENT *client = clnt_create (host, MOUNTPROG, MOUNTVERS, "udp"); if (client == NULL) { printf ("error: clnt_create failed\n"); return 1; } struct exportnode *exports = NULL; int ret = CLNT_CALL (client, MOUNTPROC_EXPORT, (xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_exports, (char *)&exports, ((struct timeval) {15, 0})); if (ret != 0) { clnt_perrno (ret); puts (""); return 1; } dump_exports (exports); } else { usage (argv); return 1; } return 0; }
Diffstat (limited to 'sunrpc/clnt_gen.c')
-rw-r--r--sunrpc/clnt_gen.c37
1 files changed, 2 insertions, 35 deletions
diff --git a/sunrpc/clnt_gen.c b/sunrpc/clnt_gen.c
index df34672..8dffaa9 100644
--- a/sunrpc/clnt_gen.c
+++ b/sunrpc/clnt_gen.c
@@ -45,9 +45,6 @@ CLIENT *
clnt_create (const char *hostname, u_long prog, u_long vers,
const char *proto)
{
- struct hostent hostbuf, *h;
- size_t hstbuflen;
- char *hsttmpbuf;
struct protoent protobuf, *p;
size_t prtbuflen;
char *prttmpbuf;
@@ -56,7 +53,6 @@ clnt_create (const char *hostname, u_long prog, u_long vers,
int sock;
struct timeval tv;
CLIENT *client;
- int herr;
if (strcmp (proto, "unix") == 0)
{
@@ -78,37 +74,8 @@ clnt_create (const char *hostname, u_long prog, u_long vers,
return client;
}
- hstbuflen = 1024;
- hsttmpbuf = __alloca (hstbuflen);
- while (__gethostbyname_r (hostname, &hostbuf, hsttmpbuf, hstbuflen,
- &h, &herr) != 0
- || h == NULL)
- if (herr != NETDB_INTERNAL || errno != ERANGE)
- {
- get_rpc_createerr().cf_stat = RPC_UNKNOWNHOST;
- return NULL;
- }
- else
- {
- /* Enlarge the buffer. */
- hstbuflen *= 2;
- hsttmpbuf = __alloca (hstbuflen);
- }
-
- if (h->h_addrtype != AF_INET)
- {
- /*
- * Only support INET for now
- */
- struct rpc_createerr *ce = &get_rpc_createerr ();
- ce->cf_stat = RPC_SYSTEMERROR;
- ce->cf_error.re_errno = EAFNOSUPPORT;
- return NULL;
- }
- sin.sin_family = h->h_addrtype;
- sin.sin_port = 0;
- __bzero (sin.sin_zero, sizeof (sin.sin_zero));
- memcpy ((char *) &sin.sin_addr, h->h_addr, h->h_length);
+ if (__libc_rpc_gethostbyname (hostname, &sin) != 0)
+ return NULL;
prtbuflen = 1024;
prttmpbuf = __alloca (prtbuflen);