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/*
* Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
*
* 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 "vss.h"
#include "list.h"
#include "send.h"
#include "close_on_fork.h"
#include "net.h"
#include "fd.h"
#include "chunk_queue.h"
#include "acl.h"
/** Message sent to clients that do not send a valid get request. */
#define HTTP_ERR_MSG "HTTP/1.0 400 Bad Request\n"
/** 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,
/** Connection is ready for sending audio data. */
HTTP_STREAMING,
/** We didn't receive a valid get request. */
HTTP_INVALID_GET_REQUEST
};
/** 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;
};
static struct sender_status http_sender_status, *hss = &http_sender_status;
static int http_send_msg(struct sender_client *sc, const char *msg)
{
int ret = send_buffer(sc->fd, msg);
if (ret < 0)
shutdown_client(sc, hss);
return ret;
}
static void http_send_ok_msg(struct sender_client *sc)
{
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 sender_client *sc)
{
PARA_NOTICE_LOG("sending bad request message to fd %d\n", sc->fd);
return http_send_msg(sc, HTTP_ERR_MSG);
}
static void http_shutdown_clients(void)
{
shutdown_clients(hss);
}
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 sender_client *sc, *tmp;
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;
send_chunk(sc, hss, 0, current_chunk, buf, len, header_buf,
header_len);
}
}
static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
{
struct sender_client *sc, *tmp;
struct private_http_sender_data *phsd;
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 */
break;
case HTTP_CONNECTED: /* need to recv get request */
if (FD_ISSET(sc->fd, rfds)) {
if (recv_pattern(sc->fd, HTTP_GET_MSG, MAXLINE)
< 0) {
phsd->status = HTTP_INVALID_GET_REQUEST;
} else {
phsd->status = HTTP_GOT_GET_REQUEST;
PARA_INFO_LOG("received get request\n");
}
}
break;
case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
phsd->status = HTTP_STREAMING;
http_send_ok_msg(sc);
break;
case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
if (http_send_err_msg(sc) >= 0)
shutdown_client(sc, hss);
break;
}
}
if (!FD_ISSET(hss->listen_fd, rfds))
return;
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(int *max_fileno, fd_set *rfds, fd_set *wfds)
{
struct sender_client *sc, *tmp;
if (hss->listen_fd < 0)
return;
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);
if (phsd->status == HTTP_GOT_GET_REQUEST ||
phsd->status == HTTP_INVALID_GET_REQUEST)
para_fd_set(sc->fd, wfds, max_fileno);
}
}
static int http_com_on(__a_unused struct sender_command_data *scd)
{
return generic_com_on(hss, IPPROTO_TCP);
}
static int http_com_off(__a_unused struct sender_command_data *scd)
{
generic_com_off(hss);
return 1;
}
static int http_com_deny(struct sender_command_data *scd)
{
generic_com_deny(scd, hss);
return 1;
}
static int http_com_allow(struct sender_command_data *scd)
{
generic_com_allow(scd, hss);
return 1;
}
static char *http_info(void)
{
return get_sender_info(hss, "http");
}
/**
* The init function of the http sender.
*
* \param s Pointer to the http sender struct.
*
* 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)
{
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 = 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;
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));
}
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