X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=http_send.c;h=5b98bbf4522c71d76a81d77e3de69f0545371ed0;hp=799c06cc2dfa2b4400882cdb14fb16089d1bc77e;hb=b2e6a24448a9e49e0766ab4f32163580eeff469e;hpb=d2e164526bed7f523043b7e4ec5bd282d5bc6f19

diff --git a/http_send.c b/http_send.c
index 799c06cc..5b98bbf4 100644
--- a/http_send.c
+++ b/http_send.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -18,484 +18,161 @@
 #include "server.h"
 #include "http.h"
 #include "vss.h"
-#include "send.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"
-/** \endcond */
 
 /** 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_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 400000
-/** 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;
-	/** 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.*/
-	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 chunks for this client. */
-	struct chunk_queue *cq;
+/** 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. */
-	unsigned 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)
-{
-	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);
-	cq_destroy(hc->cq);
-	list_del(&hc->node);
-	free(hc);
-}
-
-static void http_shutdown_clients(void)
-{
-	struct http_client *hc, *tmp;
-	list_for_each_entry_safe(hc, tmp, &clients, node)
-		http_shutdown_client(hc, "vss 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 send_queued_chunks(struct http_client *hc)
-{
-	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;
-		cq_get(qc, &buf, &len);
-		ret = write(hc->fd, buf, len);
-		if (ret < 0)
-			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)
+static void http_shutdown_clients(void)
 {
-	int ret = cq_enqueue(hc->cq, chunk_num, sent);
-	if (ret < 0)
-		http_shutdown_client(hc, "queue error");
-	return ret;
+	shutdown_clients(hss);
 }
 
-static void http_send( long unsigned current_chunk,
-	__a_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) {
-			size_t hlen;
-			char *hbuf = vss_get_header(&hlen);
-			if (hbuf && hlen > 0 && current_chunk) {
-				/* need to send header */
-				PARA_INFO_LOG("queueing header: %zu\n", hlen);
-				if (queue_chunk_or_shutdown(hc, -1U, 0) < 0)
-					continue;
-			} else
-				PARA_INFO_LOG("no need to queue header\n");
-			hc->status = HTTP_STREAMING;
-		}
-		ret = send_queued_chunks(hc);
-		if (ret < 0) {
-			http_shutdown_client(hc, "queue send error");
-			continue;
-		}
-		if (!len)
+	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 || write_ok(hc->fd) <= 0) {
-			queue_chunk_or_shutdown(hc, current_chunk, 0);
-			continue;
-		}
-//		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_chunk_or_shutdown(hc, current_chunk, ret);
-	}
-}
-
-static int host_in_access_perm_list(struct http_client *hc)
-{
-	struct sockaddr_storage   ss;
-	socklen_t                 sslen = sizeof(ss);
-
-	if (getpeername(hc->fd, (struct sockaddr *)&ss, &sslen) < 0) {
-		PARA_ERROR_LOG("can not determine address family: %s\n", strerror(errno));
-	} else if (ss.ss_family == AF_INET) {
-		/* FIXME: access restriction is (currently) only supported for IPv4 */
-		struct access_info *ai, *tmp;
-		struct in_addr client_addr = ((struct sockaddr_in *)&ss)->sin_addr;
-
-		list_for_each_entry_safe(ai, tmp, &access_perm_list, node) {
-			unsigned mask = ((~0U) >> ai->netmask);
-			if ((client_addr.s_addr & mask) == (ai->addr.s_addr & mask))
-				return 1;
-		}
+		send_chunk(sc, hss, 0, current_chunk, buf, len, header_buf,
+			header_len);
 	}
-	return 0;
 }
 
-static void http_post_select(fd_set *rfds, fd_set *wfds)
+static void http_post_select(fd_set *rfds, __a_unused fd_set *wfds)
 {
-	int i = -1, match;
-	struct http_client *hc, *tmp;
-	const char *err_msg;
+	struct sender_client *sc, *tmp;
+	struct private_http_sender_data *phsd;
 
-	list_for_each_entry_safe(hc, tmp, &clients, node) {
-		i++;
-//		PARA_DEBUG_LOG("handling client %d: %s\n", i, remote_name(hc->fd));
-		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, NULL, 0);
-	if (hc->fd <= 0)
-		goto err_out;
-	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;
-	}
-	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;
-	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_nonblocking(hc->fd);
-	return;
-err_out:
-	PARA_WARNING_LOG("ignoring connect request from %s (%s)\n",
-			 hc->name, err_msg);
-	if (hc->fd > 0)
-		close(hc->fd);
-	free(hc);
-}
-
-static void http_pre_select(int *max_fileno, fd_set *rfds, fd_set *wfds)
-{
-	struct http_client *hc, *tmp;
-
-	if (server_fd < 0)
+	sc = accept_sender_client(hss);
+	if (!sc)
 		return;
-	para_fd_set(server_fd, rfds, max_fileno);
-	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 */
-			para_fd_set(hc->fd, rfds, max_fileno);
-			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 */
-			para_fd_set(hc->fd, wfds, max_fileno);
-			hc->check_w = 1;
-			break;
-		case HTTP_SENT_OK_MSG:
-			if (!vss_playing())
-				break; /* wait until server starts playing */
-			para_fd_set(hc->fd, wfds, max_fileno);
-			hc->check_w = 1;
-			break;
-		}
-	}
+	phsd = para_malloc(sizeof(*phsd));
+	sc->private_data = phsd;
+	phsd->status = HTTP_CONNECTED;
 }
 
-static int open_tcp_port(int port)
+static void http_pre_select(int *max_fileno, fd_set *rfds, __a_unused fd_set *wfds)
 {
-	int ret;
+	struct sender_client *sc, *tmp;
 
-	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_nonblocking(server_fd);
-	if (ret < 0) {
-		PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));
-		exit(EXIT_FAILURE);
+	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);
 	}
-	self->status = SENDER_ON;
-	add_close_on_fork_list(server_fd);
-	return 1;
 }
 
 static int http_com_on(__a_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(__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();
+	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);
-	para_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 ", clnts? clnts : "",
-					 hc->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",
-		(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_pton(AF_INET, 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");
 }
 
 /**
@@ -508,22 +185,26 @@ static char *http_help(void)
  */
 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); /* ignore errors */
-	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));
 }