/*
- * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file http_send.c paraslash's http sender */
+#include <sys/types.h>
+#include <dirent.h>
+#include "para.h"
+#include "error.h"
+#include "string.h"
#include "server.cmdline.h"
+#include "afh.h"
+#include "afs.h"
#include "server.h"
#include "http.h"
-#include "afs.h"
-#include "send.h"
+#include "vss.h"
#include "list.h"
+#include "send.h"
#include "close_on_fork.h"
-#include "error.h"
#include "net.h"
-#include "string.h"
+#include "fd.h"
+#include "chunk_queue.h"
+#include "acl.h"
-/** \cond convert sock_addr_in to ascii */
-#define CLIENT_ADDR(hc) inet_ntoa((hc)->addr.sin_addr)
-/* get the port number of a struct http_client */
-#define CLIENT_PORT(hc) (hc)->addr.sin_port
+/** Message sent to clients that do not send a valid get request. */
#define HTTP_ERR_MSG "HTTP/1.0 400 Bad Request\n"
-/** \endcond */
-extern struct gengetopt_args_info conf;
-
-/** the possible states of a client from the server's POV */
-enum http_status {
+/** The possible states of a client from the server's POV. */
+enum http_client_status {
+ /** We accepted the connection on the tcp socket. */
HTTP_CONNECTED,
+ /** Successfully received the get request. */
HTTP_GOT_GET_REQUEST,
- HTTP_SENT_OK_MSG,
- HTTP_READY_TO_STREAM,
+ /** Connection is ready for sending audio data. */
HTTP_STREAMING,
+ /** We didn't receive a valid get request. */
HTTP_INVALID_GET_REQUEST
};
-/** clients will be kicked if there are more than that many bytes pending */
-#define MAX_BACKLOG 40000
-/** the list of connected clients **/
-static struct list_head clients;
-/** the whitelist/blacklist */
-static struct list_head access_perm_list;
-
-/** describes one client that connected the tcp port of the http sender */
-struct http_client {
-/** the file descriptor of the client */
- int fd;
-/** address information about the client */
- struct sockaddr_in addr;
-/** the client's current status */
- enum http_status status;
-/** non-zero if we included \a fd in the read set */
- int check_r;
-/** non-zero if we included \a fd in the write set */
- int check_w;
-/** the position of this client in the client list */
- struct list_head node;
-/** the list of pending packets for this client */
- struct list_head packet_queue;
-/** the number of pending bytes for this client */
- unsigned long pq_bytes;
-};
-
-/**
- * describes one queued data packet for a client
- *
- * The send function of the http sender checks each client fd for writing. If a
- * client fd is not ready, it tries to queue that packet for this client until
- * the number of queued bytes exceeds \p MAX_BACKLOG.
- */
-struct queued_packet {
-/** the length of the packet in bytes */
- unsigned int len;
-/** pointer to the packet data */
- char *packet;
-/** position of the packet in the packet list */
- struct list_head node;
+/** For each connected client, a structure of this type is maintained. */
+struct private_http_sender_data {
+ /** The current state of this client. */
+ enum http_client_status status;
};
-/**
- * describes one entry in the blacklist/whitelist of the http sender
- */
-struct access_info {
- /** the address to be black/whitelisted */
- struct in_addr addr;
- /** the netmask for this entry */
- int netmask;
- /** the position of this entry in the access_perm_list */
- struct list_head node;
-};
-
-static int server_fd = -1, numclients;
-static struct sender *self;
-
-
-static void http_shutdown_client(struct http_client *hc, const char *msg)
-{
- struct queued_packet *qp, *tmp;
- PARA_INFO_LOG("shutting down %s on fd %d (%s)\n", CLIENT_ADDR(hc),
- hc->fd, msg);
- numclients--;
- close(hc->fd);
-
- list_for_each_entry_safe(qp, tmp, &hc->packet_queue, node) {
- free(qp->packet);
- list_del(&qp->node);
- free(qp);
- }
- list_del(&hc->node);
- free(hc);
- return;
-}
-
-static void http_shutdown_clients_real(void)
-{
- struct http_client *hc, *tmp;
- list_for_each_entry_safe(hc, tmp, &clients, node)
- http_shutdown_client(hc, "afs request");
-}
-static void http_shutdown_clients(void)
-{
- struct http_client *hc, *tmp;
- list_for_each_entry_safe(hc, tmp, &clients, node)
- if (hc->status == HTTP_STREAMING)
- http_shutdown_client(hc, "afs request");
-}
+static struct sender_status http_sender_status, *hss = &http_sender_status;
-static int http_send_msg(struct http_client *hc, const char *msg)
+static int http_send_msg(struct sender_client *sc, const char *msg)
{
- int ret = send_buffer(hc->fd, msg);
+ int ret = send_buffer(sc->fd, msg);
if (ret < 0)
- http_shutdown_client(hc, "send msg failed");
+ shutdown_client(sc, hss);
return ret;
}
-static void http_send_ok_msg(struct http_client *hc)
+static void http_send_ok_msg(struct sender_client *sc)
{
- PARA_INFO_LOG("sending http ok message to fd %d\n", hc->fd);
- http_send_msg(hc, HTTP_OK_MSG);
+ PARA_INFO_LOG("sending http ok message to fd %d\n", sc->fd);
+ http_send_msg(sc, HTTP_OK_MSG);
}
-static int http_send_err_msg(struct http_client *hc)
+static int http_send_err_msg(struct sender_client *sc)
{
- PARA_NOTICE_LOG("sending bad request message to fd %d\n", hc->fd);
- return http_send_msg(hc, HTTP_ERR_MSG);
+ PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
+ return http_send_msg(sc, HTTP_ERR_MSG);
}
-static int queue_packet(struct http_client *hc, const char *buf, size_t len)
-{
- struct queued_packet *qp;
- if (hc->pq_bytes + len > MAX_BACKLOG) {
- http_shutdown_client(hc, "packet queue overrun");
- return -E_QUEUE;
- }
- qp = para_malloc(sizeof(struct queued_packet));
- hc->pq_bytes += len;
- qp->packet = para_malloc(len);
- memcpy(qp->packet, buf, len);
- qp->len = len;
- list_add_tail(&qp->node, &hc->packet_queue);
- PARA_INFO_LOG("%lu bytes queued for fd %d\n", hc->pq_bytes, hc->fd);
- return 1;
-}
-
-static int send_queued_packets(struct http_client *hc)
+static void http_shutdown_clients(void)
{
- int ret;
- struct queued_packet *qp, *tmp;
-
- if (list_empty(&hc->packet_queue))
- return 1;
- list_for_each_entry_safe(qp, tmp, &hc->packet_queue, node) {
- ret = write_ok(hc->fd);
- if (ret <= 0)
- return ret? -E_WRITE_OK : 0;
- ret = write(hc->fd, qp->packet, qp->len);
- if (ret < 0)
- return ret;
- if (ret != qp->len) {
- qp->len -= ret;
- memmove(qp->packet, qp->packet + ret, qp->len);
- return 0;
- }
- hc->pq_bytes -= qp->len;
- free(qp->packet);
- list_del(&qp->node);
- free(qp);
- }
- return 1;
+ shutdown_clients(hss);
}
-static void http_send(__unused struct audio_format *af,
- long unsigned current_chunk,
- __unused long unsigned chunks_sent, const char *buf, size_t len)
+static void http_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 http_client *hc, *tmp;
- int ret;
+ struct sender_client *sc, *tmp;
- list_for_each_entry_safe(hc, tmp, &clients, node) {
- if (hc->status != HTTP_STREAMING &&
- hc->status != HTTP_READY_TO_STREAM)
- continue;
- if (hc->status == HTTP_READY_TO_STREAM) {
- if (af->get_header_info && current_chunk) {
- /* need to send header */
- int hlen;
- char *buf = af->get_header_info(&hlen);
- if (!buf || hlen <= 0)
- continue; /* header not yet available */
- PARA_INFO_LOG("queueing header: %d\n", hlen);
- if (queue_packet(hc, buf, hlen) < 0)
- continue;
- } else
- PARA_INFO_LOG("%s", "no need to queue header\n");
- hc->status = HTTP_STREAMING;
- }
- ret = send_queued_packets(hc);
- if (ret < 0) {
- http_shutdown_client(hc, "send error");
- continue;
- }
- if (!len)
- continue;
- if (!ret || write_ok(hc->fd) <= 0) {
- PARA_INFO_LOG("fd %d not ready (%lu bytes queued),"
- " trying to queue packet\n", hc->fd,
- hc->pq_bytes);
- queue_packet(hc, buf, len);
- continue;
- }
-// PARA_DEBUG_LOG("sending %d -> %s\n", len, CLIENT_ADDR(hc));
- ret = write(hc->fd, buf, len);
- if (ret < 0) {
- http_shutdown_client(hc, "send error");
+ list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
+ struct private_http_sender_data *phsd = sc->private_data;
+ if (phsd->status != HTTP_STREAMING)
continue;
- }
- if (ret != len)
- queue_packet(hc, buf + ret, len - ret);
+ send_chunk(sc, hss, 0, current_chunk, buf, len, header_buf,
+ header_len);
}
}
-static int host_in_access_perm_list(struct http_client *hc)
+static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
{
- struct access_info *ai, *tmp;
- list_for_each_entry_safe(ai, tmp, &access_perm_list, node) {
- unsigned mask = ((~0) >> ai->netmask);
- if ((hc->addr.sin_addr.s_addr & mask) == (ai->addr.s_addr & mask))
- return 1;
- }
- return 0;
-}
+ struct sender_client *sc, *tmp;
+ struct private_http_sender_data *phsd;
-static void http_post_select(__unused struct audio_format *af, fd_set *rfds,
- fd_set *wfds)
-{
- int i = -1, match;
- struct http_client *hc, *tmp;
- const char *err_msg;
-
- list_for_each_entry_safe(hc, tmp, &clients, node) {
- i++;
-// PARA_DEBUG_LOG("handling client %d: %s\n", i, CLIENT_ADDR(hc));
- switch (hc->status) {
+ if (hss->listen_fd < 0)
+ return;
+ list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
+ phsd = sc->private_data;
+ switch (phsd->status) {
case HTTP_STREAMING: /* nothing to do */
- case HTTP_READY_TO_STREAM:
break;
case HTTP_CONNECTED: /* need to recv get request */
- if (hc->check_r && FD_ISSET(hc->fd, rfds)) {
- if (recv_pattern(hc->fd, HTTP_GET_MSG, MAXLINE)
+ if (FD_ISSET(sc->fd, rfds)) {
+ if (recv_pattern(sc->fd, HTTP_GET_MSG, MAXLINE)
< 0) {
- hc->status = HTTP_INVALID_GET_REQUEST;
+ phsd->status = HTTP_INVALID_GET_REQUEST;
} else {
- hc->status = HTTP_GOT_GET_REQUEST;
- PARA_INFO_LOG("%s",
- "received get request\n");
+ phsd->status = HTTP_GOT_GET_REQUEST;
+ PARA_INFO_LOG("received get request\n");
}
}
break;
case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
- if (hc->check_w && FD_ISSET(hc->fd, wfds)) {
- hc->status = HTTP_SENT_OK_MSG;
- http_send_ok_msg(hc);
- }
+ phsd->status = HTTP_STREAMING;
+ http_send_ok_msg(sc);
break;
case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
- if (hc->check_w && FD_ISSET(hc->fd, wfds)) {
- if (http_send_err_msg(hc) >= 0)
- http_shutdown_client(hc,
- "invalid get request");
- }
- break;
- case HTTP_SENT_OK_MSG: /* need to send header? */
- if (hc->check_w && FD_ISSET(hc->fd, wfds))
- hc->status = HTTP_READY_TO_STREAM;
+ if (http_send_err_msg(sc) >= 0)
+ shutdown_client(sc, hss);
break;
}
}
- if (!FD_ISSET(server_fd, rfds))
+ if (!FD_ISSET(hss->listen_fd, rfds))
return;
- hc = para_calloc(sizeof(struct http_client));
- err_msg = "accept error";
- hc->fd = para_accept(server_fd, &hc->addr, sizeof(struct sockaddr_in));
- if (hc->fd <= 0)
- goto err_out;
- PARA_NOTICE_LOG("connection from %s (fd %d)\n", CLIENT_ADDR(hc), hc->fd);
- if (conf.http_max_clients_arg > 0 && numclients >=
- conf.http_max_clients_arg) {
- err_msg = "server full";
- goto err_out;
- }
- match = host_in_access_perm_list(hc);
- PARA_DEBUG_LOG("host_in_access_perm_list: %d\n", match);
- if ((match && !conf.http_default_deny_given) ||
- (!match && conf.http_default_deny_given)) {
- err_msg = "permission denied";
- goto err_out;
- }
- hc->status = HTTP_CONNECTED;
- INIT_LIST_HEAD(&hc->packet_queue);
- PARA_INFO_LOG("accepted client #%d: %s (fd %d)\n", numclients,
- CLIENT_ADDR(hc), hc->fd);
- numclients++;
- list_add(&hc->node, &clients);
- return;
-err_out:
- PARA_WARNING_LOG("ignoring connect request from %s (%s)\n",
- CLIENT_ADDR(hc), err_msg);
- if (hc->fd > 0)
- close(hc->fd);
- free(hc);
+ sc = accept_sender_client(hss);
+ if (!sc)
+ return;
+ phsd = para_malloc(sizeof(*phsd));
+ sc->private_data = phsd;
+ phsd->status = HTTP_CONNECTED;
}
-static void http_pre_select(struct audio_format *af, int *max_fileno, fd_set *rfds,
- fd_set *wfds)
+static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
{
- struct http_client *hc, *tmp;
+ struct sender_client *sc, *tmp;
- if (server_fd < 0)
+ if (hss->listen_fd < 0)
return;
- FD_SET(server_fd, rfds);
- *max_fileno = MAX(*max_fileno, server_fd);
- list_for_each_entry_safe(hc, tmp, &clients, node) {
- //PARA_DEBUG_LOG("hc %p on fd %d: status %d\n", hc, hc->fd, hc->status);
- hc->check_r = 0;
- hc->check_w = 0;
- switch (hc->status) {
- case HTTP_STREAMING:
- case HTTP_READY_TO_STREAM:
- break;
- case HTTP_CONNECTED: /* need to recv get request */
- FD_SET(hc->fd, rfds);
- *max_fileno = MAX(*max_fileno, hc->fd);
- hc->check_r = 1;
- break;
- case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
- case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
- FD_SET(hc->fd, wfds);
- *max_fileno = MAX(*max_fileno, hc->fd);
- hc->check_w = 1;
- break;
- case HTTP_SENT_OK_MSG:
- if (!af || !afs_playing())
- break; /* wait until server starts playing */
- FD_SET(hc->fd, wfds);
- *max_fileno = MAX(*max_fileno, hc->fd);
- hc->check_w = 1;
- break;
- }
+ para_fd_set(hss->listen_fd, rfds, max_fileno);
+ list_for_each_entry_safe(sc, tmp, &hss->client_list, node) {
+ struct private_http_sender_data *phsd = sc->private_data;
+ if (phsd->status == HTTP_CONNECTED) /* need to recv get request */
+ para_fd_set(sc->fd, rfds, max_fileno);
}
}
-static int open_tcp_port(int port)
+static int http_com_on(__a_unused struct sender_command_data *scd)
{
- server_fd = init_tcp_socket(port);
- if (server_fd < 0) {
- http_shutdown_clients_real();
- self->status = SENDER_OFF;
- return server_fd;
- }
- self->status = SENDER_ON;
- add_close_on_fork_list(server_fd);
- return 1;
-}
-
-static int http_com_on(__unused struct sender_command_data *scd)
-{
- if (self->status == SENDER_ON)
- return 1;
- return open_tcp_port(conf.http_port_arg);
+ return generic_com_on(hss, IPPROTO_TCP);
}
-static int http_com_off(__unused struct sender_command_data *scd)
+static int http_com_off(__a_unused struct sender_command_data *scd)
{
- self->status = SENDER_OFF;
- if (server_fd > 0) {
- close(server_fd);
- del_close_on_fork_list(server_fd);
- server_fd = -1;
- }
- http_shutdown_clients_real();
+ generic_com_off(hss);
return 1;
}
-static void del_perm_list_entry(struct sender_command_data *scd)
-{
- struct access_info *ai, *tmp;
-
- list_for_each_entry_safe(ai, tmp, &access_perm_list, node) {
- char *nad = para_strdup(inet_ntoa(ai->addr));
- if (!strcmp(nad, inet_ntoa(scd->addr)) &&
- ai->netmask == scd->netmask) {
- PARA_NOTICE_LOG("removing %s/%i from access list\n",
- nad, ai->netmask);
- list_del(&ai->node);
- free(ai);
- }
- free(nad);
- }
-}
-
-static void add_perm_list_entry(struct sender_command_data *scd)
-{
- struct access_info *ai = para_malloc(sizeof(struct access_info));
- ai->addr = scd->addr;
- ai->netmask = scd->netmask;
- PARA_INFO_LOG("adding %s/%i to access list\n", inet_ntoa(ai->addr),
- ai->netmask);
- list_add(&ai->node, &access_perm_list);
-}
-
static int http_com_deny(struct sender_command_data *scd)
{
- if (conf.http_default_deny_given)
- del_perm_list_entry(scd);
- else
- add_perm_list_entry(scd);
+ generic_com_deny(scd, hss);
return 1;
}
static int http_com_allow(struct sender_command_data *scd)
{
- if (conf.http_default_deny_given)
- add_perm_list_entry(scd);
- else
- del_perm_list_entry(scd);
+ generic_com_allow(scd, hss);
return 1;
}
static char *http_info(void)
{
- char *clnts = NULL, *ap = NULL, *ret;
- struct access_info *ai, *tmp_ai;
- struct http_client *hc, *tmp_hc;
-
- list_for_each_entry_safe(ai, tmp_ai, &access_perm_list, node) {
- char *tmp = make_message("%s%s/%d ", ap? ap : "",
- inet_ntoa(ai->addr), ai->netmask);
- free(ap);
- ap = tmp;
- }
- list_for_each_entry_safe(hc, tmp_hc, &clients, node) {
- char *tmp = make_message("%s%s:%d ", clnts? clnts : "",
- CLIENT_ADDR(hc), CLIENT_PORT(hc));
- free(clnts);
- clnts = tmp;
- }
- ret = make_message(
- "http status: %s\n"
- "http tcp port: %d\n"
- "http clients: %d\n"
- "http maximal number of clients: %d%s\n"
- "http connected clients: %s\n"
- "http access %s list: %s\n",
- (self->status == SENDER_ON)? "on" : "off",
- conf.http_port_arg,
- numclients,
- conf.http_max_clients_arg,
- conf.http_max_clients_arg > 0? "" : " (unlimited)",
- clnts? clnts : "(none)",
- conf.http_default_deny_given? "allow" : "deny",
- ap? ap : "(none)"
- );
- free(ap);
- free(clnts);
- return ret;
-}
-
-static void init_access_control_list(void)
-{
- int i;
- struct sender_command_data scd;
-
- INIT_LIST_HEAD(&access_perm_list);
- for (i = 0; i < conf.http_access_given; i++) {
- char *arg = para_strdup(conf.http_access_arg[i]);
- char *p = strchr(arg, '/');
- if (!p)
- goto err;
- *p = '\0';
- if (!inet_aton(arg, &scd.addr))
- goto err;
- scd.netmask = atoi(++p);
- if (scd.netmask < 0 || scd.netmask > 32)
- goto err;
- add_perm_list_entry(&scd);
- goto success;
-err:
- PARA_CRIT_LOG("syntax error for http_access option "
- "#%d, ignoring\n", i);
-success:
- free(arg);
- continue;
- }
-}
-
-static char *http_help(void)
-{
- return make_message(
- "usage: {on|off}\n"
- "usage: {allow|deny} IP mask\n"
- "example: allow 127.0.0.1 32\n"
- );
+ return get_sender_info(hss, "http");
}
/**
- * the init function of the http sender
+ * The init function of the http sender.
*
- * \param s pointer to the http sender struct
+ * \param s Pointer to the http sender struct.
*
- * It initializes all function pointers of \a s, init the client list and the
- * acess control list as well. If autostart is wanted, open the tcp port.
+ * It initializes all function pointers of \a s, the client list and the access
+ * control list. If the autostart option was given, the tcp port is opened.
*/
void http_send_init(struct sender *s)
{
- INIT_LIST_HEAD(&clients);
+ int ret;
s->info = http_info;
s->send = http_send;
s->pre_select = http_pre_select;
s->post_select = http_post_select;
s->shutdown_clients = http_shutdown_clients;
- s->help = http_help;
+ s->help = generic_sender_help;
s->client_cmds[SENDER_ON] = http_com_on;
s->client_cmds[SENDER_OFF] = http_com_off;
s->client_cmds[SENDER_DENY] = http_com_deny;
s->client_cmds[SENDER_ALLOW] = http_com_allow;
s->client_cmds[SENDER_ADD] = NULL;
s->client_cmds[SENDER_DELETE] = NULL;
- self = s;
- init_access_control_list();
- if (!conf.http_no_autostart_given)
- open_tcp_port(conf.http_port_arg);
- PARA_DEBUG_LOG("%s", "http sender init complete\n");
+
+ init_sender_status(hss, conf.http_access_arg, conf.http_access_given,
+ conf.http_port_arg, conf.http_max_clients_arg,
+ conf.http_default_deny_given);
+ if (conf.http_no_autostart_given)
+ return;
+ ret = generic_com_on(hss, IPPROTO_TCP);
+ if (ret < 0)
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
}
projects / paraslash.git / blobdiff