+#include "server.h"
+#include "net.h"
+#include "list.h"
+#include "afs.h"
+#include "send.h"
+#include "dccp.h"
+#include "error.h"
+#include "string.h"
+#include "server.cmdline.h"
+extern struct gengetopt_args_info conf;
+/** the list of connected clients **/
+static struct list_head clients;
+static int listen_fd = -1;
+static struct sender *self;
+
+/** describes one connected client */
+struct dccp_client {
+ /** the dccp socket */
+ int fd;
+ /** address information about the client */
+ struct sockaddr_in addr;
+ /** the position of this client in the client list */
+ struct list_head node;
+ int header_sent; /* non-zero if audio file header has been sent */
+};
+
+static void dccp_pre_select(__unused struct audio_format *af, int *max_fileno, fd_set *rfds,
+ __unused fd_set *wfds)
+{
+ if (listen_fd < 0)
+ return;
+ FD_SET(listen_fd, rfds);
+ *max_fileno = MAX(*max_fileno, listen_fd);
+}
+
+static void dccp_post_select(__unused struct audio_format *af, fd_set *rfds,
+ __unused fd_set *wfds)
+{
+ struct dccp_client *dc;
+ int ret;
+
+ if (!FD_ISSET(listen_fd, rfds))
+ return;
+ PARA_NOTICE_LOG("%s", "accepting...\n");
+ dc = para_calloc(sizeof(struct dccp_client));
+ ret = para_accept(listen_fd, &dc->addr, sizeof(struct sockaddr_in));
+ if (ret < 0) {
+ PARA_ERROR_LOG("%s", PARA_STRERROR(-ret));
+ return;
+ }
+ PARA_NOTICE_LOG("%s", "connection\n");
+ dc->fd = ret;
+ list_add(&dc->node, &clients);
+}
+
+static int dccp_open(void)
+{
+ struct sockaddr_in servaddr;
+ int ret;
+
+ ret = dccp_get_socket();
+ if (ret < 0)
+ return ret;
+ listen_fd = ret;
+
+ bzero(&servaddr, 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)
+ return -E_DCCP_LISTEN;
+ PARA_DEBUG_LOG("listening on fd %d\n", listen_fd);
+ return 1;
+}
+
+static void dccp_shutdown_client(struct dccp_client *dc)
+{
+ close(dc->fd);
+ list_del(&dc->node);
+ free(dc);
+}
+
+static void dccp_send(__unused struct audio_format *af,
+ long unsigned current_chunk,
+ __unused long unsigned chunks_sent, const char *buf, size_t len)
+{
+ struct dccp_client *dc, *tmp;
+ int ret, header_len;
+ char *header_buf;
+
+ if (listen_fd < 0 || !len)
+ return;
+
+ list_for_each_entry_safe(dc, tmp, &clients, node) {
+ if (!_write_ok(dc->fd))
+ continue;
+ if (!dc->header_sent && af->get_header_info && current_chunk) {
+ header_buf = af->get_header_info(&header_len);
+ if (!header_buf || header_len <= 0)
+ continue; /* header not yet available */
+ ret = write(dc->fd, header_buf, header_len);
+ if (ret != header_len) {
+ dccp_shutdown_client(dc);
+ continue;
+ }
+ if (!_write_ok(dc->fd))
+ continue;
+ }
+ PARA_DEBUG_LOG("writing %d bytes to fd %d\n", len, dc->fd);
+ ret = write(dc->fd, buf, len);
+ if (ret != len)
+ dccp_shutdown_client(dc);
+ }
+}
+
+static void dccp_shutdown_clients(void)
+{
+ struct dccp_client *dc, *tmp;
+
+ list_for_each_entry_safe(dc, tmp, &clients, node)
+ dccp_shutdown_client(dc);
+}
+
+static char *dccp_info(void)
+{
+ static char *buf;
+ int num_clients = 0;
+ struct dccp_client *dc, *tmp;
+
+ free(buf);
+ list_for_each_entry_safe(dc, tmp, &clients, node)
+ num_clients++;
+ buf = make_message("%d connected clients\n", num_clients);
+ return buf;
+}
+
+static char *dccp_help(void)
+{
+ return make_message("no help available\n");
+}
+
+void dccp_send_init(struct sender *s)
+{
+ int ret;
+
+ INIT_LIST_HEAD(&clients);
+ s->info = dccp_info;
+ s->send = dccp_send;
+ s->pre_select = dccp_pre_select;
+ s->post_select = dccp_post_select;
+ s->shutdown_clients = dccp_shutdown_clients;
+ s->help = dccp_help;
+ s->client_cmds[SENDER_ON] = NULL;
+ s->client_cmds[SENDER_OFF] = NULL;
+ s->client_cmds[SENDER_DENY] = NULL;
+ s->client_cmds[SENDER_ALLOW] = NULL;
+ s->client_cmds[SENDER_ADD] = NULL;
+ s->client_cmds[SENDER_DELETE] = NULL;
+ self = s;
+ ret = dccp_open();
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ else
+ s->status = SENDER_ON;
+}