?? tcpcli01.c
字號:
#include "unp.h"intmain(int argc, char **argv){ int c, sockfd, len = 0; u_char *ptr; struct addrinfo *ai; if (argc < 2) err_quit("usage: tcpcli01 [ -[gG] <hostname> ... ] <hostname>"); ptr = inet_srcrt_init(); opterr = 0; /* don't want getopt() writing to stderr */ while ( (c = getopt(argc, argv, "g:G:")) != -1) { switch (c) { case 'g': /* loose source route */ len = inet_srcrt_add(optarg, 0); break; case 'G': /* strict source route */ len = inet_srcrt_add(optarg, 1); break; case '?': err_quit("unrecognized option: %c", c); } } if (optind != argc-1) err_quit("missing <hostname>"); ai = Host_serv(argv[optind], SERV_PORT_STR, AF_INET, SOCK_STREAM); sockfd = Socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); if (len > 0) { len = inet_srcrt_add(argv[optind], 0); /* dest at end */ Setsockopt(sockfd, IPPROTO_IP, IP_OPTIONS, ptr, len); free(ptr); } Connect(sockfd, ai->ai_addr, ai->ai_addrlen); str_cli(stdin, sockfd); /* do it all */ exit(0);}
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