ctdb/utils/smnotify/smnotify.c

   1 /*
   2    simple smnotify tool
   3
   4    Copyright (C) Ronnie Sahlberg 2007
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19 #include <stdio.h>
  20 #include <unistd.h>
  21 #include <string.h>
  22 #include <sys/types.h>
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25 #include <arpa/inet.h>
  26 #include <stdlib.h>
  27 #include "smnotify.h"
  28 #include "popt.h"
  29
  30 static char *client       = NULL;
  31 static const char *ip     = NULL;
  32 static char *server = NULL;
  33 static int stateval       = 0;
  34 static int clientport     = 0;
  35 static int sendport       = 0;
  36
  37 static void useage(void)
  38 {
  39         exit(0);
  40 }
  41
  42 static int create_socket(const char *addr, int port)
  43 {
  44         int s;
  45         struct sockaddr_in sock_in;
  46
  47         s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
  48         if (s == -1) {
  49                 printf("Failed to open local socket\n");
  50                 exit(10);
  51         }
  52
  53         bzero(&sock_in, sizeof(sock_in));
  54         sock_in.sin_family = AF_INET;
  55         sock_in.sin_port   = htons(port);
  56         inet_aton(addr, &sock_in.sin_addr);
  57         if (bind(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) == -1) {
  58                 printf("Failed to bind to local socket\n");
  59                 exit(10);
  60         }
  61
  62         return s;
  63 }
  64
  65 int main(int argc, const char *argv[])
  66 {
  67         struct poptOption popt_options[] = {
  68                 POPT_AUTOHELP
  69                 { "client", 'c', POPT_ARG_STRING, &client, 0, "remote client to send the notify to", "hostname/ip" },
  70                 { "clientport", 0, POPT_ARG_INT, &clientport, 0, "clientport", "integer" },
  71                 { "ip", 'i', POPT_ARG_STRING, &ip, 0, "local ip address to send the notification from", "ip" },
  72                 { "sendport", 0, POPT_ARG_INT, &sendport, 0, "port to send the notify from", "integer" },
  73                 { "server", 's', POPT_ARG_STRING, &server, 0, "servername to use in the notification", "hostname/ip" },
  74                 { "stateval", 0, POPT_ARG_INT, &stateval, 0, "stateval", "integer" },
  75                 POPT_TABLEEND
  76         };
  77         int opt;
  78         poptContext pc;
  79         CLIENT *clnt;
  80         int s;
  81         struct sockaddr_in sock_cl;
  82         struct timeval w;
  83         struct status st;
  84
  85         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
  86
  87         while ((opt = poptGetNextOpt(pc)) != -1) {
  88                 switch (opt) {
  89                 default:
  90                         fprintf(stderr, "Invalid option %s: %s\n",
  91                                 poptBadOption(pc, 0), poptStrerror(opt));
  92                         exit(1);
  93                 }
  94         }
  95
  96         if (client == NULL) {
  97                 printf("ERROR: client not specified\n");
  98                 useage();
  99         }
 100
 101         if (ip == NULL) {
 102                 printf("ERROR: ip not specified\n");
 103                 useage();
 104         }
 105
 106         if (server == NULL) {
 107                 printf("ERROR: server not specified\n");
 108                 useage();
 109         }
 110
 111         if (stateval == 0) {
 112                 printf("ERROR: stateval not specified\n");
 113                 useage();
 114         }
 115
 116
 117         /* Since we want to control from which address these packets are
 118            sent we must create the socket ourself and use low-level rpc
 119            calls.
 120         */
 121         s = create_socket(ip, sendport);
 122
 123         /* only wait for at most 3 seconds before giving up */
 124         alarm(3);
 125
 126         /* Setup a sockaddr_in for the client we want to notify */
 127         bzero(&sock_cl, sizeof(sock_cl));
 128         sock_cl.sin_family = AF_INET;
 129         sock_cl.sin_port   = htons(clientport);
 130         inet_aton(client, &sock_cl.sin_addr);
 131
 132         w.tv_sec = 1;
 133         w.tv_usec= 0;
 134
 135         clnt = clntudp_create(&sock_cl, 100024, 1, w, &s);
 136         if (clnt == NULL) {
 137                 printf("ERROR: failed to connect to client\n");
 138                 exit(10);
 139         }
 140
 141         /* we don't want to wait for any reply */
 142         w.tv_sec = 0;
 143         w.tv_usec = 0;
 144         clnt_control(clnt, CLSET_TIMEOUT, (char *)&w);
 145
 146         st.mon_name=server;
 147         st.state=stateval;
 148         sm_notify_1(&st, clnt);
 149
 150         return 0;
 151 }