+void generate_new_sender(int ep_fd)
+{
+ int sock, one = 1;
+ unsigned src_num, dst_num;
+ unsigned long long num_bytes;
+ struct sockaddr_in sin;
+ struct epoll_event ev;
+
+ sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
+ if (sock == -1) {
+ perror("socket()");
+ exit(1);
+ }
+
+ // find the right parameters
+ src_num = (unsigned)(num_sources * gen_uniform_random());
+ dst_num = (unsigned)(num_destinations * gen_uniform_random());
+ num_bytes = (unsigned)gen_pareto_random(1048576.0, 1.0);
+
+ // FIXME: bind to the right source
+
+ if (ioctl(sock, FIONBIO, &one) == -1) {
+ perror("FIONBIO");
+ exit(1);
+ }
+
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons(port);
+ sin.sin_addr = destinations[dst_num];
+
+ // non-blocking connect (will be detected by epoll later)
+ if (connect(sock, (struct sockaddr *)&sin, sizeof(sin)) == -1) {
+ perror("connect()");
+ exit(1);
+ }
+
+ // stick it in the epoll set (FIXME: make edge-triggered?)
+ ev.events = EPOLLOUT | EPOLLHUP | EPOLLERR;
+ ev.data.fd = sock;
+ ev.data.u64 = num_bytes;
+
+ if (epoll_ctl(ep_fd, EPOLL_CTL_ADD, sock, &ev) == -1) {
+ perror("EPOLL_CTL_ADD");
+ exit(1);
+ }
+}
+