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 "smnotify.h"
  27 #include "popt.h"
  28
  29 static char *client       = NULL;
  30 static const char *ip     = NULL;
  31 static char *server = NULL;
  32 static int stateval       = 0;
  33 static int clientport     = 0;
  34 static int sendport       = 0;
  35
  36 static void useage(void)
  37 {
  38         exit(0);
  39 }
  40
  41 static int create_socket(const char *addr, int port)
  42 {
  43         int s;
  44         struct sockaddr_in sock_in;
  45
  46         s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
  47         if (s == -1) {
  48                 printf("Failed to open local socket\n");
  49                 exit(10);
  50         }
  51
  52         bzero(&sock_in, sizeof(sock_in));
  53         sock_in.sin_family = PF_INET;
  54         sock_in.sin_port   = htons(port);
  55         inet_aton(addr, &sock_in.sin_addr);
  56         if (bind(s, (struct sockaddr *)&sock_in, sizeof(sock_in)) == -1) {
  57                 printf("Failed to bind to local socket\n");
  58                 exit(10);
  59         }
  60
  61         return s;
  62 }
  63
  64 int main(int argc, const char *argv[])
  65 {
  66         struct poptOption popt_options[] = {
  67                 POPT_AUTOHELP
  68                 { "client", 'c', POPT_ARG_STRING, &client, 0, "remote client to send the notify to", "hostname/ip" },
  69                 { "clientport", 0, POPT_ARG_INT, &clientport, 0, "clientport", "integer" },
  70                 { "ip", 'i', POPT_ARG_STRING, &ip, 0, "local ip address to send the notification from", "ip" },
  71                 { "sendport", 0, POPT_ARG_INT, &sendport, 0, "port to send the notify from", "integer" },
  72                 { "server", 's', POPT_ARG_STRING, &server, 0, "servername to use in the notification", "hostname/ip" },
  73                 { "stateval", 0, POPT_ARG_INT, &stateval, 0, "stateval", "integer" },
  74                 POPT_TABLEEND
  75         };
  76         int opt;
  77         poptContext pc;
  78         CLIENT *clnt;
  79         int s;
  80         struct sockaddr_in sock_cl;
  81         struct timeval w;
  82         struct status st;
  83
  84         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
  85
  86         while ((opt = poptGetNextOpt(pc)) != -1) {
  87                 switch (opt) {
  88                 default:
  89                         fprintf(stderr, "Invalid option %s: %s\n",
  90                                 poptBadOption(pc, 0), poptStrerror(opt));
  91                         exit(1);
  92                 }
  93         }
  94
  95         if (client == NULL) {
  96                 printf("ERROR: client not specified\n");
  97                 useage();
  98         }
  99
 100         if (ip == NULL) {
 101                 printf("ERROR: ip not specified\n");
 102                 useage();
 103         }
 104
 105         if (server == NULL) {
 106                 printf("ERROR: server not specified\n");
 107                 useage();
 108         }
 109
 110         if (stateval == 0) {
 111                 printf("ERROR: stateval not specified\n");
 112                 useage();
 113         }
 114
 115
 116         /* Since we want to control from which address these packets are
 117            sent we must create the socket ourself and use low-level rpc
 118            calls.
 119         */
 120         s = create_socket(ip, sendport);
 121
 122         /* only wait for at most 3 seconds before giving up */
 123         alarm(3);
 124
 125         /* Setup a sockaddr_in for the client we want to notify */
 126         bzero(&sock_cl, sizeof(sock_cl));
 127         sock_cl.sin_family = PF_INET;
 128         sock_cl.sin_port   = htons(clientport);
 129         inet_aton(client, &sock_cl.sin_addr);
 130
 131         w.tv_sec = 1;
 132         w.tv_usec= 0;
 133
 134         clnt = clntudp_create(&sock_cl, 100024, 1, w, &s);
 135         if (clnt == NULL) {
 136                 printf("ERROR: failed to connect to client\n");
 137                 exit(10);
 138         }
 139
 140         /* we dont want to wait for any reply */
 141         w.tv_sec = 0;
 142         w.tv_usec = 0;
 143         clnt_control(clnt, CLSET_TIMEOUT, (char *)&w);
 144
 145         st.mon_name=server;
 146         st.state=stateval;
 147         sm_notify_1(&st, clnt);
 148
 149         return 0;
 150 }