/*
- * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2007 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 "vss.h"
#include "send.h"
#include "list.h"
#include "close_on_fork.h"
-#include "error.h"
#include "net.h"
-#include "string.h"
#include "fd.h"
+#include "chunk_queue.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 */
-/** the possible states of a client from the server's POV */
+
+/** The possible states of a client from the server's POV. */
enum http_status {
+ /** We accepted the connection on the tcp socket. */
HTTP_CONNECTED,
+ /** Successfully received the get request. */
HTTP_GOT_GET_REQUEST,
+ /** We sent the OK message back to the client. */
HTTP_SENT_OK_MSG,
+ /** Connection established, we might need to send the audio file header. */
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 **/
+/** Clients will be kicked if there are more than that many bytes pending. */
+#define MAX_BACKLOG 400000
+/** The list of connected clients. */
static struct list_head clients;
-/** the whitelist/blacklist */
+/** The whitelist/blacklist. */
static struct list_head access_perm_list;
-/** describes one client that connected the tcp port of the http sender */
+/** Describes one client that connected the tcp port of the http sender. */
struct http_client {
-/** the file descriptor of the client */
+ /** The file descriptor of the client. */
int fd;
-/** address information about the client */
- struct sockaddr_in addr;
-/** the client's current status */
+ /** The socket `name' of the client. */
+ char *name;
+ /** The client's current status. */
enum http_status status;
-/** non-zero if we included \a fd in the read set */
+ /** 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 */
+ /** 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 */
+ /** The position of this client in the client list. */
struct list_head node;
+ /** The list of pending chunks for this client. */
+ struct chunk_queue *cq;
};
/**
- * describes one entry in the blacklist/whitelist of the http sender
+ * Describes one entry in the blacklist/whitelist of the http sender.
*/
struct access_info {
- /** the address to be black/whitelisted */
+ /** 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 */
+ /** The netmask for this entry. */
+ unsigned netmask;
+ /** The position of this entry in the access_perm_list. */
struct list_head node;
};
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);
+ PARA_INFO_LOG("shutting down %s on fd %d (%s)\n", hc->name, hc->fd,
+ msg);
numclients--;
+ free(hc->name);
close(hc->fd);
del_close_on_fork_list(hc->fd);
- list_for_each_entry_safe(qp, tmp, &hc->packet_queue, node) {
- free(qp->packet);
- list_del(&qp->node);
- free(qp);
- }
+ cq_destroy(hc->cq);
list_del(&hc->node);
free(hc);
}
{
struct http_client *hc, *tmp;
list_for_each_entry_safe(hc, tmp, &clients, node)
- http_shutdown_client(hc, "afs request");
+ http_shutdown_client(hc, "vss request");
}
static int http_send_msg(struct http_client *hc, const char *msg)
return http_send_msg(hc, 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 int send_queued_chunks(struct http_client *hc)
{
- 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);
+ struct queued_chunk *qc;
+ while ((qc = cq_peek(hc->cq))) {
+ char *buf;
+ size_t len;
+ int ret = write_ok(hc->fd);
if (ret <= 0)
return ret? -E_WRITE_OK : 0;
- ret = write(hc->fd, qp->packet, qp->len);
+ cq_get(qc, &buf, &len);
+ ret = write(hc->fd, buf, 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 -E_SEND_QUEUED_CHUNK;
+ cq_update(hc->cq, ret);
+ if (ret != len)
+ return 1;
+ cq_dequeue(hc->cq);
}
return 1;
}
+static int queue_chunk_or_shutdown(struct http_client *hc, long unsigned chunk_num,
+ size_t sent)
+{
+ int ret = cq_enqueue(hc->cq, chunk_num, sent);
+ if (ret < 0)
+ http_shutdown_client(hc, "queue error");
+ return ret;
+}
+
static void http_send( long unsigned current_chunk,
__a_unused long unsigned chunks_sent, const char *buf, size_t len)
{
hc->status != HTTP_READY_TO_STREAM)
continue;
if (hc->status == HTTP_READY_TO_STREAM) {
- int hlen;
- char *hbuf = afs_get_header(&hlen);
+ size_t hlen;
+ char *hbuf = vss_get_header(&hlen);
if (hbuf && hlen > 0 && current_chunk) {
/* need to send header */
- PARA_INFO_LOG("queueing header: %d\n", hlen);
- if (queue_packet(hc, hbuf, hlen) < 0)
+ PARA_INFO_LOG("queueing header: %zu\n", hlen);
+ if (queue_chunk_or_shutdown(hc, -1U, 0) < 0)
continue;
} else
- PARA_INFO_LOG("%s", "no need to queue header\n");
+ PARA_INFO_LOG("no need to queue header\n");
hc->status = HTTP_STREAMING;
}
- ret = send_queued_packets(hc);
+ ret = send_queued_chunks(hc);
if (ret < 0) {
- http_shutdown_client(hc, "send error");
+ http_shutdown_client(hc, "queue 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);
+ queue_chunk_or_shutdown(hc, current_chunk, 0);
continue;
}
-// PARA_DEBUG_LOG("sending %d -> %s\n", len, CLIENT_ADDR(hc));
+// PARA_DEBUG_LOG("sending %d -> %s\n", len, remote_name(hc->fd));
ret = write(hc->fd, buf, len);
+// PARA_DEBUG_LOG("ret: %d\n", ret);
if (ret < 0) {
http_shutdown_client(hc, "send error");
continue;
}
if (ret != len)
- queue_packet(hc, buf + ret, len - ret);
+ queue_chunk_or_shutdown(hc, current_chunk, ret);
}
}
+/**
+ * Return true if addr_1 matches addr_2 in the first `netmask' bits.
+ */
+static int v4_addr_match(uint32_t addr_1, uint32_t addr_2, uint8_t netmask)
+{
+ uint32_t mask = ~0U;
+
+ if (netmask < 32)
+ mask <<= (32 - netmask);
+ return (htonl(addr_1) & mask) == (htonl(addr_2) & mask);
+}
+
static int host_in_access_perm_list(struct http_client *hc)
{
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;
+ struct sockaddr_storage ss;
+ socklen_t sslen = sizeof(ss);
+ struct in_addr v4_addr;
+
+ if (getpeername(hc->fd, (struct sockaddr *)&ss, &sslen) < 0) {
+ PARA_ERROR_LOG("Can not determine peer address: %s\n", strerror(errno));
+ goto no_match;
}
+ v4_addr = extract_v4_addr(&ss);
+ if (!v4_addr.s_addr)
+ goto no_match;
+
+ list_for_each_entry_safe(ai, tmp, &access_perm_list, node)
+ if (v4_addr_match(v4_addr.s_addr, ai->addr.s_addr, ai->netmask))
+ return 1;
+no_match:
return 0;
}
list_for_each_entry_safe(hc, tmp, &clients, node) {
i++;
-// PARA_DEBUG_LOG("handling client %d: %s\n", i, CLIENT_ADDR(hc));
+// PARA_DEBUG_LOG("handling client %d: %s\n", i, remote_name(hc->fd));
switch (hc->status) {
case HTTP_STREAMING: /* nothing to do */
case HTTP_READY_TO_STREAM:
return;
hc = para_calloc(sizeof(struct http_client));
err_msg = "accept error";
- hc->fd = para_accept(server_fd, &hc->addr, sizeof(struct sockaddr_in));
+ hc->fd = para_accept(server_fd, NULL, 0);
if (hc->fd <= 0)
goto err_out;
- PARA_NOTICE_LOG("connection from %s (fd %d)\n", CLIENT_ADDR(hc), hc->fd);
+ hc->name = make_message("%s", remote_name(hc->fd));
+ PARA_NOTICE_LOG("connection from %s (fd %d)\n", hc->name, hc->fd);
if (conf.http_max_clients_arg > 0 && numclients >=
conf.http_max_clients_arg) {
err_msg = "server full";
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);
+ hc->cq = cq_new(MAX_BACKLOG);
numclients++;
+ PARA_INFO_LOG("accepted client #%d: %s (fd %d)\n", numclients,
+ hc->name, hc->fd);
para_list_add(&hc->node, &clients);
add_close_on_fork_list(hc->fd);
- mark_fd_nonblock(hc->fd);
+ mark_fd_nonblocking(hc->fd);
return;
err_out:
PARA_WARNING_LOG("ignoring connect request from %s (%s)\n",
- CLIENT_ADDR(hc), err_msg);
+ hc->name, err_msg);
if (hc->fd > 0)
close(hc->fd);
free(hc);
hc->check_w = 1;
break;
case HTTP_SENT_OK_MSG:
- if (!afs_playing())
+ if (!vss_playing())
break; /* wait until server starts playing */
para_fd_set(hc->fd, wfds, max_fileno);
hc->check_w = 1;
{
int ret;
- server_fd = init_tcp_socket(port);
+ server_fd = para_listen(AF_UNSPEC, IPPROTO_TCP, port);
if (server_fd < 0) {
http_shutdown_clients();
self->status = SENDER_OFF;
return server_fd;
}
- ret = mark_fd_nonblock(server_fd);
+ ret = mark_fd_nonblocking(server_fd);
if (ret < 0) {
PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
exit(EXIT_FAILURE);
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));
+ char *tmp = make_message("%s%s ", clnts? clnts : "", hc->name);
free(clnts);
clnts = tmp;
}
if (!p)
goto err;
*p = '\0';
- if (!inet_aton(arg, &scd.addr))
+ if (!inet_pton(AF_INET, arg, &scd.addr))
goto err;
scd.netmask = atoi(++p);
if (scd.netmask < 0 || scd.netmask > 32)
}
/**
- * 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)
{
projects / paraslash.git / blobdiff