examples/nfsclient-bcast.c

   1 /*
   2    Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2011
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 /* Example program using the lowlevel raw broadcast interface.
  19  */
  20
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <poll.h>
  26 #include <errno.h>
  27 #include <sys/socket.h>
  28 #include <netdb.h>
  29 #include "libnfs.h"
  30 #include "libnfs-raw.h"
  31 #include "libnfs-raw-mount.h"
  32 #include "libnfs-raw-portmap.h"
  33 #include "libnfs-private.h"
  34
  35 void pm_cb(struct rpc_context *rpc _U_, int status, void *data, void *private_data _U_)
  36 {
  37         pmap_call_result *res = (pmap_call_result *)data;
  38         struct sockaddr *sin;
  39         char hostdd[16];
  40
  41         if (status != 0) {
  42                 printf("callback for CALLIT failed\n");
  43                 exit(10);
  44         }
  45
  46         sin = rpc_get_recv_sockaddr(rpc);
  47         if (sin == NULL) {
  48                 printf("failed to get sockaddr for received pdu\n");
  49                 exit(10);
  50         }
  51
  52         if (getnameinfo(sin, sizeof(struct sockaddr_in), &hostdd[0], sizeof(hostdd), NULL, 0, NI_NUMERICHOST) < 0) {
  53                 printf("getnameinfo failed\n");
  54                 exit(10);
  55         }
  56
  57         printf("NFS server at %s\n", hostdd);
  58 }
  59
  60 int main(int argc _U_, char *argv[] _U_)
  61 {
  62         struct rpc_context *rpc;
  63         struct pollfd pfd;
  64
  65         rpc = rpc_init_udp_context();
  66         if (rpc == NULL) {
  67                 printf("failed to init context\n");
  68                 exit(10);
  69         }
  70
  71         if (rpc_bind_udp(rpc, "0.0.0.0", 0) < 0) {
  72                 printf("failed to bind to udp %s\n", rpc_get_error(rpc));
  73                 exit(10);
  74         }
  75
  76         if (rpc_set_udp_destination(rpc, "10.1.1.255", 111, 1) < 0) {
  77                 printf("failed to set udp destination %s\n", rpc_get_error(rpc));
  78                 exit(10);
  79         }
  80
  81         if (rpc_pmap_callit_async(rpc, 100005, 2, 0, NULL, 0, pm_cb, NULL) < 0) {
  82                 printf("Failed to set up callit function\n");
  83                 exit(10);
  84         }
  85         if (rpc_set_udp_destination(rpc, "10.9.2.255", 111, 1) < 0) {
  86                 printf("failed to set udp destination %s\n", rpc_get_error(rpc));
  87                 exit(10);
  88         }
  89
  90         if (rpc_pmap_callit_async(rpc, 100005, 2, 0, NULL, 0, pm_cb, NULL) < 0) {
  91                 printf("Failed to set up callit function\n");
  92                 exit(10);
  93         }
  94
  95         alarm(3);
  96
  97         for(;;) {
  98                 pfd.fd = rpc_get_fd(rpc);
  99                 pfd.events = rpc_which_events(rpc);
 100
 101                 if (poll(&pfd, 1, -1) < 0) {
 102                         printf("Poll failed");
 103                         exit(10);
 104                 }
 105                 if (rpc_service(rpc, pfd.revents) < 0) {
 106                         printf("rpc_service failed with %s\n", rpc_get_error(rpc));
 107                         break;
 108                 }
 109         }
 110
 111         rpc_destroy_context(rpc);
 112         rpc=NULL;
 113         printf("nfsclient finished\n");
 114         return 0;
 115 }