sending out of band data example code

/* oobsend.c * sending out of band data example code * Example OOB sender */ #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <sys/types.h> #include <sys/socket.h> extern void displayError(char *on_what); extern int Connect(char *addr); /* * Send in-band data */ static void iband(int s,char *str) { int z; z = send(s,str,strlen(str),0); if ( z == -1 ) { displayError("send(2)"); } printf("ib '%s' (%d)\n",str,z); } /* * Send out-of-band data */ static void oband(int s,char *str) { int z; z = send(s,str,strlen(str),MSG_OOB); if ( z == -1 ) { displayError("send(2)"); } printf("OOB '%s' (%d)\n",str,z); } int main(int argc,char **argv) { int s = -1; /* Socket */ s = Connect(argc >= 2 ? argv[1] : "127.0.0.1:9011"); iband(s,"In the beginning"); sleep(1); iband(s,"Linus begat Linux,"); sleep(1); iband(s,"and the Penguins"); sleep(1); oband(s,"rejoiced"); sleep(1); iband(s,"exceedingly."); close(s); return 0; }