2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
19 /** \file dccp_send.c paraslash's dccp sender */
22 * based on server.c of dccp-cs-0.01.tar.bz2,
23 * (C) 2005 Ian McDonald <imcdnzl@gmail.com>
35 #include "close_on_fork.h"
36 #include "server.cmdline.h"
38 /** the list of connected clients **/
39 static struct list_head clients;
40 static int listen_fd = -1;
41 static struct sender *self;
43 /** describes one connected client */
45 /** the dccp socket */
47 /** address information about the client */
48 struct sockaddr_in addr;
49 /** the position of this client in the client list */
50 struct list_head node;
51 /** non-zero if audio file header has been sent */
55 static void dccp_pre_select( int *max_fileno, fd_set *rfds,
56 __a_unused fd_set *wfds)
60 FD_SET(listen_fd, rfds);
61 *max_fileno = PARA_MAX(*max_fileno, listen_fd);
64 static void dccp_post_select(fd_set *rfds, __a_unused fd_set *wfds)
66 struct dccp_client *dc;
69 if (!FD_ISSET(listen_fd, rfds))
71 dc = para_calloc(sizeof(struct dccp_client));
72 ret = para_accept(listen_fd, &dc->addr, sizeof(struct sockaddr_in));
74 PARA_ERROR_LOG("%s", PARA_STRERROR(-ret));
77 PARA_NOTICE_LOG("connection from %s\n", inet_ntoa(dc->addr.sin_addr));
79 list_add(&dc->node, &clients);
80 add_close_on_fork_list(dc->fd);
81 mark_fd_nonblock(dc->fd);
84 static int dccp_open(void)
86 struct sockaddr_in servaddr;
89 ret = dccp_get_socket();
94 bzero(&servaddr, sizeof(servaddr));
95 servaddr.sin_family = AF_INET;
96 servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
97 servaddr.sin_port = htons(conf.dccp_port_arg);
98 ret = bind(listen_fd, (struct sockaddr *)&servaddr, sizeof(servaddr));
101 ret = dccp_set_socket(listen_fd);
104 ret = listen(listen_fd, 0);
106 return -E_DCCP_LISTEN;
107 PARA_DEBUG_LOG("listening on fd %d\n", listen_fd);
108 add_close_on_fork_list(listen_fd);
109 mark_fd_nonblock(listen_fd);
113 static void dccp_shutdown_client(struct dccp_client *dc)
115 PARA_DEBUG_LOG("shutting down %s (fd %d)\n", inet_ntoa(dc->addr.sin_addr),
118 del_close_on_fork_list(dc->fd);
123 #define DCCP_RETRIES 100
125 static int dccp_write(int fd, const char *buf, size_t len)
127 size_t size, written = 0;
128 int ret, retries = 0;
130 size = PARA_MIN(1024, len - written);
131 ret = write(fd, buf + written, size);
133 if (errno != EAGAIN || !retries++ > DCCP_RETRIES)
135 PARA_DEBUG_LOG("EAGAIN #%d@%zd/%zd\n", retries, written, len);
146 return -E_DCCP_WRITE;
149 static void dccp_send(long unsigned current_chunk,
150 __a_unused long unsigned chunks_sent, const char *buf, size_t len)
152 struct dccp_client *dc, *tmp;
156 if (listen_fd < 0 || !len)
159 list_for_each_entry_safe(dc, tmp, &clients, node) {
160 ret = write_ok(dc->fd);
162 dccp_shutdown_client(dc);
167 if (!dc->header_sent && current_chunk) {
168 header_buf = afs_get_header(&header_len);
169 if (header_buf && header_len > 0) {
170 ret = dccp_write(dc->fd, header_buf, header_len);
171 if (ret != header_len) {
173 PARA_ERROR_LOG("header write: %d/%d (%s)\n",
174 ret, header_len, ret < 0?
176 dccp_shutdown_client(dc);
180 ret = write_ok(dc->fd);
182 dccp_shutdown_client(dc);
189 // PARA_DEBUG_LOG("writing %d bytes to fd %d\n", len, dc->fd);
190 ret = dccp_write(dc->fd, buf, len);
192 dccp_shutdown_client(dc);
196 static void dccp_shutdown_clients(void)
198 struct dccp_client *dc, *tmp;
200 list_for_each_entry_safe(dc, tmp, &clients, node)
201 dccp_shutdown_client(dc);
204 static char *dccp_info(void)
208 struct dccp_client *dc, *tmp;
211 list_for_each_entry_safe(dc, tmp, &clients, node)
213 buf = make_message("dccp connected clients: %d\n", num_clients);
217 static char *dccp_help(void)
219 return make_message("no help available\n");
223 * the init function of the dccp sender
225 * \param s pointer to the dccp sender struct
227 * It initializes all function pointers of \a s and starts
228 * listening on the given port.
230 void dccp_send_init(struct sender *s)
234 INIT_LIST_HEAD(&clients);
237 s->pre_select = dccp_pre_select;
238 s->post_select = dccp_post_select;
239 s->shutdown_clients = dccp_shutdown_clients;
241 s->client_cmds[SENDER_ON] = NULL;
242 s->client_cmds[SENDER_OFF] = NULL;
243 s->client_cmds[SENDER_DENY] = NULL;
244 s->client_cmds[SENDER_ALLOW] = NULL;
245 s->client_cmds[SENDER_ADD] = NULL;
246 s->client_cmds[SENDER_DELETE] = NULL;
250 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
251 s->status = SENDER_OFF;
253 s->status = SENDER_ON;