#include "unp.h" int main(int argc, char **argv) { int sockfd; if (argc != 3) err_quit("usage: tcpsend04 "); sockfd = Tcp_connect(argv[1], argv[2]); Write(sockfd, "123", 3); printf("wrote 3 bytes of normal data\n"); Send(sockfd, "4", 1, MSG_OOB); printf("wrote 1 byte of OOB data\n"); Write(sockfd, "5", 1); printf("wrote 1 byte of normal data\n"); exit(0); }