84 int net;                          /* socket descriptor */  variable
198   close(net);  in Finish()
312   if ((net = socket(AF_INET, SOCK_RAW, protnum)) < 0) {  in main()
320     if (bind(net, &wherefrom, sizeof(wherefrom)) < 0) {  in main()
326   if (connect(net,&whereto,sizeof(struct sockaddr_in)) < 0 ) {  in main()
328     close(net);  in main()
340   if (tun > net)  in main()
343 	lastfd = net;  in main()
348     FD_SET(tun,&rfds); FD_SET(net,&rfds);  in main()
353       close(net);  in main()
358       close(net);  in main()
363     if(FD_ISSET(net,&rfds)) {  in main()
365       len = read(net, buf, sizeof(buf));  in main()
379       if(send(net, buf, len,0) <= 0) {  in main()