/*
- * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file http_send.c paraslash's http sender */
+#include <regex.h>
#include <sys/types.h>
#include <dirent.h>
+#include <osl.h>
+#include <stdbool.h>
#include "para.h"
#include "error.h"
#include "afs.h"
#include "server.h"
#include "http.h"
-#include "vss.h"
#include "list.h"
#include "send.h"
+#include "vss.h"
#include "close_on_fork.h"
#include "net.h"
#include "fd.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_status {
+enum http_client_status {
/** We accepted the connection on the tcp socket. */
HTTP_CONNECTED,
/** Successfully received the get request. */
HTTP_INVALID_GET_REQUEST
};
-/** 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. */
-static struct list_head http_acl;
-
-static int listen_fd = -1, numclients;
-
+/** For each connected client, a structure of this type is maintained. */
struct private_http_sender_data {
- enum http_status status;
+ /** 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);
+ shutdown_client(sc, hss);
return ret;
}
static void http_shutdown_clients(void)
{
- struct sender_client *sc, *tmp;
- list_for_each_entry_safe(sc, tmp, &clients, node)
- shutdown_client(sc);
+ shutdown_clients(hss);
+}
+
+static int queue_chunk_or_shutdown(struct sender_client *sc,
+ struct sender_status *ss, const char *buf, size_t num_bytes)
+{
+ int ret = cq_enqueue(sc->cq, buf, num_bytes);
+ if (ret < 0)
+ shutdown_client(sc, ss);
+ return ret;
+}
+
+/**
+ * Send one chunk of audio data to a connected client.
+ *
+ * \param sc The client.
+ * \param ss The sender.
+ * \param current_chunk The number of the chunk to write.
+ * \param buf The data to write.
+ * \param len The number of bytes of \a buf.
+ * \param header_buf The audio file header.
+ * \param header_len The number of bytes of \a header_buf.
+ *
+ * On errors, the client is shut down. If only a part of the buffer could be
+ * written, the remainder is put into the chunk queue for that client.
+ */
+static void http_send_chunk(struct sender_client *sc, struct sender_status *ss,
+ long unsigned current_chunk, const char *buf, size_t len,
+ const char *header_buf, size_t header_len)
+{
+ int ret;
+
+ if (!sc->header_sent && current_chunk) {
+ if (header_buf && header_len > 0) {
+ ret = queue_chunk_or_shutdown(sc, ss, header_buf, header_len);
+ if (ret < 0)
+ goto out;
+ }
+ }
+ sc->header_sent = 1;
+ ret = send_queued_chunks(sc->fd, sc->cq);
+ if (ret < 0) {
+ shutdown_client(sc, ss);
+ goto out;
+ }
+ if (!len)
+ goto out;
+ if (!ret) { /* still data left in the queue */
+ ret = queue_chunk_or_shutdown(sc, ss, buf, len);
+ goto out;
+ }
+ ret = write_nonblock(sc->fd, buf, len);
+ if (ret < 0) {
+ shutdown_client(sc, ss);
+ goto out;
+ }
+ if (ret != len)
+ ret = queue_chunk_or_shutdown(sc, ss, buf + ret, len - ret);
+out:
+ if (ret < 0)
+ PARA_NOTICE_LOG("%s\n", para_strerror(-ret));
}
static void http_send(long unsigned current_chunk,
- __a_unused long unsigned chunks_sent, const char *buf, size_t len)
+ __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, &clients, node) {
+ 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, 0, current_chunk, buf, len);
+
+ if (phsd->status == HTTP_STREAMING)
+ http_send_chunk(sc, hss, current_chunk, buf, len,
+ header_buf, header_len);
}
}
static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
{
- int ret, match;
struct sender_client *sc, *tmp;
struct private_http_sender_data *phsd;
+ int ret;
- if (listen_fd < 0)
- return;
- list_for_each_entry_safe(sc, tmp, &clients, node) {
+ 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("%s",
- "received get request\n");
- }
+ ret = read_pattern(sc->fd, HTTP_GET_MSG, MAXLINE, rfds);
+ if (ret < 0)
+ phsd->status = HTTP_INVALID_GET_REQUEST;
+ else if (ret > 0) {
+ phsd->status = HTTP_GOT_GET_REQUEST;
+ PARA_INFO_LOG("received get request\n");
}
break;
case HTTP_GOT_GET_REQUEST: /* need to send ok msg */
break;
case HTTP_INVALID_GET_REQUEST: /* need to send err msg */
if (http_send_err_msg(sc) >= 0)
- shutdown_client(sc);
+ shutdown_client(sc, hss);
break;
}
}
- if (!FD_ISSET(listen_fd, rfds))
- return;
- ret = para_accept(listen_fd, NULL, 0);
- if (ret < 0) {
- PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ sc = accept_sender_client(hss, rfds);
+ if (!sc)
return;
- }
- sc = para_calloc(sizeof(*sc));
- sc->fd = ret;
- sc->name = make_message("%s", remote_name(sc->fd));
- PARA_NOTICE_LOG("connection from %s (fd %d)\n", sc->name, sc->fd);
- ret = -E_MAX_CLIENTS;
- if (conf.http_max_clients_arg > 0 && numclients >=
- conf.http_max_clients_arg) {
- goto err_out;
- }
- match = acl_lookup(sc->fd, &http_acl);
- PARA_DEBUG_LOG("acl lookup returned %d\n", match);
- ret = -E_ACL_PERM;
- if ((match && !conf.http_default_deny_given) ||
- (!match && conf.http_default_deny_given))
- goto err_out;
- ret = mark_fd_nonblocking(sc->fd);
- if (ret < 0)
- goto err_out;
phsd = para_malloc(sizeof(*phsd));
sc->private_data = phsd;
phsd->status = HTTP_CONNECTED;
- sc->cq = cq_new(MAX_BACKLOG);
- numclients++;
- PARA_INFO_LOG("accepted client #%d: %s (fd %d)\n", numclients,
- sc->name, sc->fd);
- para_list_add(&sc->node, &clients);
- add_close_on_fork_list(sc->fd);
- return;
-err_out:
- PARA_WARNING_LOG("%s\n", para_strerror(-ret));
- close(sc->fd);
- free(sc);
}
-static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
+static void http_pre_select(int *max_fileno, fd_set *rfds, fd_set *wfds)
{
struct sender_client *sc, *tmp;
- if (listen_fd < 0)
+ if (hss->listen_fd < 0)
return;
- para_fd_set(listen_fd, rfds, max_fileno);
- list_for_each_entry_safe(sc, tmp, &clients, node) {
+ 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)
{
- if (listen_fd >= 0)
- return 1;
- return open_sender(IPPROTO_TCP, conf.http_port_arg);
+ return generic_com_on(hss, IPPROTO_TCP);
}
static int http_com_off(__a_unused struct sender_command_data *scd)
{
- if (listen_fd < 0)
- return 1;
- PARA_NOTICE_LOG("closing http port %d\n", conf.http_port_arg);
- close(listen_fd);
- del_close_on_fork_list(listen_fd);
- http_shutdown_clients();
- listen_fd = -1;
+ generic_com_off(hss);
return 1;
}
static int http_com_deny(struct sender_command_data *scd)
{
- if (conf.http_default_deny_given)
- acl_del_entry(&http_acl, scd->addr, scd->netmask);
- else
- acl_add_entry(&http_acl, scd->addr, scd->netmask);
+ generic_com_deny(scd, hss);
return 1;
}
static int http_com_allow(struct sender_command_data *scd)
{
- if (conf.http_default_deny_given)
- acl_add_entry(&http_acl, scd->addr, scd->netmask);
- else
- acl_del_entry(&http_acl, scd->addr, scd->netmask);
+ generic_com_allow(scd, hss);
return 1;
}
static char *http_info(void)
{
- char *clnts = NULL, *ret;
- struct sender_client *sc, *tmp_sc;
-
- char *acl_contents = acl_get_contents(&http_acl);
- list_for_each_entry_safe(sc, tmp_sc, &clients, node) {
- char *tmp = make_message("%s%s ", clnts? clnts : "", sc->name);
- 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",
- (listen_fd >= 0)? "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",
- acl_contents? acl_contents : "(none)"
- );
- free(acl_contents);
- free(clnts);
- return ret;
-}
-
-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");
}
/**
void http_send_init(struct sender *s)
{
int ret;
- INIT_LIST_HEAD(&clients);
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->resolve_target = NULL;
+ 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;
- acl_init(&http_acl, conf.http_access_arg, conf.http_access_given);
+
+ 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 = open_sender(IPPROTO_TCP, conf.http_port_arg);
+ ret = generic_com_on(hss, IPPROTO_TCP);
if (ret < 0)
PARA_ERROR_LOG("%s\n", para_strerror(-ret));
- else
- listen_fd = ret;
}
projects / paraslash.git / blobdiff