/*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
-/** \file dccp_send.c paraslash's dccp sender */
+/** \file dccp_send.c Paraslash's dccp sender. */
/*
* based on server.c of dccp-cs-0.01.tar.bz2,
* (C) 2005 Ian McDonald <imcdnzl@gmail.com>
*/
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "para.h"
+#include "error.h"
+#include "string.h"
+#include "afh.h"
+#include "afs.h"
#include "server.h"
#include "net.h"
#include "list.h"
#include "vss.h"
#include "send.h"
-#include "dccp.h"
-#include "error.h"
-#include "string.h"
#include "fd.h"
#include "close_on_fork.h"
+#include "chunk_queue.h"
#include "server.cmdline.h"
+#include "acl.h"
-/** 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;
- /** non-zero if audio file header has been sent */
- int header_sent;
-};
-
-static void dccp_pre_select( int *max_fileno, fd_set *rfds,
+/** Do not write more than that many bytes at once. */
+#define DCCP_MAX_BYTES_PER_WRITE 1024
+
+static struct sender_status dccp_sender_status, *dss = &dccp_sender_status;
+
+static void dccp_pre_select(int *max_fileno, fd_set *rfds,
__a_unused fd_set *wfds)
{
- if (listen_fd < 0)
- return;
- FD_SET(listen_fd, rfds);
- *max_fileno = PARA_MAX(*max_fileno, listen_fd);
+ if (dss->listen_fd >= 0)
+ para_fd_set(dss->listen_fd, rfds, max_fileno);
}
static void dccp_post_select(fd_set *rfds, __a_unused fd_set *wfds)
{
- struct dccp_client *dc;
- int ret;
+ struct sender_client *sc;
- if (!FD_ISSET(listen_fd, rfds))
+ if (dss->listen_fd < 0 || !FD_ISSET(dss->listen_fd, rfds))
return;
- 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));
+ sc = accept_sender_client(dss);
+ if (!sc)
return;
- }
- 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);
+ /*
+ * Bypass unused CCID paths: the sender does not receive application data
+ * from the client; by shutting down this unused communication path we can
+ * reduce processing costs a bit. See analogous comment in dccp_recv.c.
+ */
+ if (shutdown(sc->fd, SHUT_RD) >= 0)
+ return;
+ PARA_WARNING_LOG("%s\n", strerror(errno));
+ shutdown_client(sc, dss);
}
-static int dccp_open(void)
+static void dccp_send(long unsigned current_chunk,
+ __a_unused long unsigned chunks_sent, const char *buf,
+ size_t len, const char *header_buf, size_t header_len)
{
- struct sockaddr_in servaddr;
- int ret;
+ struct sender_client *sc, *tmp;
- 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);
- add_close_on_fork_list(listen_fd);
- mark_fd_nonblock(listen_fd);
- return 1;
+ list_for_each_entry_safe(sc, tmp, &dss->client_list, node)
+ send_chunk(sc, dss, DCCP_MAX_BYTES_PER_WRITE, current_chunk, buf,
+ len, header_buf, header_len);
}
-static void dccp_shutdown_client(struct dccp_client *dc)
+static void dccp_shutdown_clients(void)
{
- 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);
- list_del(&dc->node);
- free(dc);
+ shutdown_clients(dss);
}
-/** give up if write would block that many times */
-#define DCCP_WRITE_RETRIES 100
-
-static int dccp_write(int fd, const char *buf, size_t len)
+static int dccp_com_on(__a_unused struct sender_command_data *scd)
{
- size_t size, written = 0;
- int ret, retries = 0;
-again:
- size = PARA_MIN(1024, len - written);
- ret = write(fd, buf + written, size);
- if (ret < 0) {
- if (errno != EAGAIN || retries++ > DCCP_WRITE_RETRIES)
- goto err_out;
- PARA_DEBUG_LOG("EAGAIN #%d@%zd/%zd\n", retries, written, len);
- goto again;
- }
- retries = 0;
- written += ret;
- if (written >= len)
- return written;
- ret = write_ok(fd);
- if (ret > 0)
- goto again;
-err_out:
- return -E_DCCP_WRITE;
+ return generic_com_on(dss, IPPROTO_DCCP);
}
-static void dccp_send(long unsigned current_chunk,
- __a_unused long unsigned chunks_sent, const char *buf, size_t len)
+static int dccp_com_off(__a_unused struct sender_command_data *scd)
{
- struct dccp_client *dc, *tmp;
- int ret;
- char *header_buf;
- unsigned header_len;
-
- if (listen_fd < 0 || !len)
- return;
-
- list_for_each_entry_safe(dc, tmp, &clients, node) {
- ret = write_ok(dc->fd);
- if (ret < 0) {
- dccp_shutdown_client(dc);
- continue;
- }
- if (!ret)
- continue;
- if (!dc->header_sent && current_chunk) {
- header_buf = vss_get_header(&header_len);
- if (header_buf && header_len > 0) {
- ret = dccp_write(dc->fd, header_buf, header_len);
- if (ret != header_len) {
- int err = errno;
- PARA_ERROR_LOG("header write: %d/%u (%s)\n",
- ret, header_len, ret < 0?
- strerror(err) : "");
- dccp_shutdown_client(dc);
- continue;
- }
- dc->header_sent = 1;
- ret = write_ok(dc->fd);
- if (ret < 0) {
- dccp_shutdown_client(dc);
- continue;
- }
- if (!ret)
- continue;
- }
- }
-// PARA_DEBUG_LOG("writing %d bytes to fd %d\n", len, dc->fd);
- ret = dccp_write(dc->fd, buf, len);
- if (ret != len)
- dccp_shutdown_client(dc);
- }
+ generic_com_off(dss);
+ return 1;
}
-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 int dccp_com_deny(struct sender_command_data *scd)
+{
+ generic_com_deny(scd, dss);
+ return 1;
}
-static char *dccp_info(void)
+static int dccp_com_allow(struct sender_command_data *scd)
{
- 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("dccp connected clients: %d\n", num_clients);
- return buf;
+ generic_com_allow(scd, dss);
+ return 1;
}
-static char *dccp_help(void)
+static char *dccp_info(void)
{
- return make_message("no help available\n");
+ return get_sender_info(dss, "dccp");
}
/**
- * the init function of the dccp sender
+ * The init function of the dccp sender.
*
- * \param s pointer to the dccp sender struct
+ * \param s pointer to the dccp sender struct.
*
* It initializes all function pointers of \a s and starts
* listening on the given port.
{
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->help = generic_sender_help;
+ s->client_cmds[SENDER_ON] = dccp_com_on;
+ s->client_cmds[SENDER_OFF] = dccp_com_off;
+ s->client_cmds[SENDER_DENY] = dccp_com_deny;
+ s->client_cmds[SENDER_ALLOW] = dccp_com_allow;
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));
- s->status = SENDER_OFF;
- } else
- s->status = SENDER_ON;
+
+ init_sender_status(dss, conf.dccp_access_arg, conf.dccp_access_given,
+ conf.dccp_port_arg, conf.dccp_max_clients_arg,
+ conf.dccp_default_deny_given);
+ ret = generic_com_on(dss, IPPROTO_DCCP);
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
}
projects / paraslash.git / blobdiff