- PARA_NOTICE_LOG("connection from %s\n", inet_ntoa(dc->addr.sin_addr));
- dc->fd = ret;
- para_list_add(&dc->node, &clients);
- add_close_on_fork_list(dc->fd);
- mark_fd_nonblock(dc->fd);
- dc->cq = cq_new(DCCP_MAX_PENDING_BYTES);
-}
-
-static int dccp_open(void)
-{
- struct sockaddr_in servaddr;
- int ret;
-
- ret = dccp_get_socket();
- if (ret < 0)
- return ret;
- listen_fd = ret;
-
- memset(&servaddr, 0, sizeof(servaddr));
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
- servaddr.sin_port = htons(conf.dccp_port_arg);
- ret = bind(listen_fd, (struct sockaddr *)&servaddr, sizeof(servaddr));
- if (ret < 0)
- return -E_DCCP_BIND;
- ret = dccp_set_socket(listen_fd);
- if (ret < 0)
- return ret;
- ret = listen(listen_fd, 0);
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", strerror(errno));
- return -E_DCCP_LISTEN;
- }
- PARA_DEBUG_LOG("listening on fd %d\n", listen_fd);
- add_close_on_fork_list(listen_fd);
- mark_fd_nonblock(listen_fd);
- return 1;
-}
-
-static void dccp_shutdown_client(struct dccp_client *dc)
-{
- PARA_DEBUG_LOG("shutting down %s (fd %d)\n", inet_ntoa(dc->addr.sin_addr),
- dc->fd);
- close(dc->fd);
- del_close_on_fork_list(dc->fd);
- cq_destroy(dc->cq);
- list_del(&dc->node);
- free(dc);
-}
-
-/*
- * ret: Negative on errors, zero if nothing was written and write returned
- * EAGAIN, number of bytes written else.
- */
-static int dccp_write(int fd, const char *buf, size_t len)
-{
- size_t written = 0;
- int ret = 0;
-
- while (written < len) {
- ret = write(fd, buf + written, PARA_MIN(1024, len - written));
- /*
- * Error handling: CCID3 has a sending wait queue which fills up and is
- * emptied asynchronously. The EAGAIN case means that there is currently
- * no space in the wait queue, but this can change at any moment and is
- * thus not an error condition.
- */
- if (ret < 0 && errno == EAGAIN)
- return written;
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", strerror(errno));
- return -E_DCCP_WRITE;
- }
- written += ret;
- }
- return written;
-}
-
-static int queue_chunk_or_shutdown(struct dccp_client *dc, long unsigned chunk_num,
- size_t sent)
-{
- int ret = cq_enqueue(dc->cq, chunk_num, sent);
- if (ret < 0) {
- PARA_NOTICE_LOG("enqueue error\n");
- dccp_shutdown_client(dc);
- }
- return ret;
-}
-
-static int send_queued_chunks(struct dccp_client *dc)
-{
- struct queued_chunk *qc;
- while ((qc = cq_peek(dc->cq))) {
- char *buf;
- size_t len;
- int ret;
- cq_get(qc, &buf, &len);
- ret = dccp_write(dc->fd, buf, len);
- if (ret < 0)
- return ret;
- cq_update(dc->cq, ret);
- if (ret != len)
- return 1;
- cq_dequeue(dc->cq);