49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
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/* IBM(c) 2013 EPL licens http://www.eclipse.org/legal/epl-v10.html
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* Jarrod Johnson - jbjohnso@us.ibm.com
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* This program periodically transmits a udp packet to designated xCAT server
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* It waits for an 'ok' and then exits
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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int main(int argc, char* argv[]) {
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int server;
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struct addrinfo hints;
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struct addrinfo *results,*cur;
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struct timeval timeout;
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int canread=0;
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char buffer[128];
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srand(time(NULL));
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memset(&hints,0,sizeof(struct addrinfo));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = IPPROTO_UDP;
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fd_set selectset;
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getaddrinfo(argv[1],argv[2],&hints,&results);
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server = socket(AF_UNSPEC,SOCK_DGRAM,17);
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for (cur=results; cur != NULL; cur = cur->ai_next) {
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server = socket(cur->ai_family,cur->ai_socktype,cur->ai_protocol);
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if (server == -1) continue;
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if (connect(server,cur->ai_addr,cur->ai_addrlen) != -1) break;
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close(server);
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}
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FD_ZERO(&selectset);
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FD_SET(server,&selectset);
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while (1) {
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timeout.tv_sec = rand() % 120+60;
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timeout.tv_usec = rand() % 10000;
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write(server,"resourcerequest: xcatd\n",strlen("resourcerequest: xcatd\n"));
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canread = select(FD_SETSIZE,&selectset,NULL,NULL,&timeout);
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if (canread) {
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read(server,buffer,sizeof(buffer));
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if (strncmp(buffer,"resourcerequest: ok",strlen("resourcerequest: ok"))==0) {
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exit(0);
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}
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}
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}
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}
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