#include <assert.h>
#include <errno.h>
#include <poll.h>
-#include <stdio.h>
+#include <stddef.h>
#include <stdlib.h>
#include <sys/socket.h>
+#include <time.h>
#include <unistd.h>
#include <string>
#include "acceptor.h"
+#include "log.h"
+#include "mutexlock.h"
#include "serverpool.h"
#include "state.pb.h"
+#include "stream.h"
#include "udpinput.h"
+#include "util.h"
#include "version.h"
using namespace std;
extern ServerPool *servers;
-UDPInput::UDPInput(const string &stream_id, const string &url)
- : stream_id(stream_id),
- url(url),
+namespace {
+
+// Similar to parse_hostport(), but only parses the IP address,
+// and does not use mapped-v4 addresses, since multicast seems
+// to not like that too much.
+bool parse_ip_address(const string &ip, sockaddr_storage *addr)
+{
+ memset(addr, 0, sizeof(*addr));
+
+ assert(!ip.empty());
+ if (ip[0] == '[') {
+ sockaddr_in6 *addr6 = (sockaddr_in6 *)addr;
+ addr6->sin6_family = AF_INET6;
+ if (ip[ip.size() - 1] != ']') {
+ log(ERROR, "address '%s' is malformed; must be either [ipv6addr] or ipv4addr",
+ ip.c_str());
+ return false;
+ }
+ if (inet_pton(AF_INET6, ip.c_str(), &addr6->sin6_addr) != 1) {
+ log(ERROR, "'%s' is not a valid IPv6 address");
+ return false;
+ }
+ } else {
+ sockaddr_in *addr4 = (sockaddr_in *)addr;
+ addr4->sin_family = AF_INET;
+ if (inet_pton(AF_INET, ip.c_str(), &addr4->sin_addr) != 1) {
+ log(ERROR, "'%s' is not a valid IPv4 address");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool maybe_join_multicast_group(int sock, const string &group, const string &source)
+{
+ if (group.empty()) {
+ // Not multicast.
+ return true;
+ }
+
+ // Join the given multicast group (ASM or SSM).
+ // TODO: Also support sources apart from multicast groups,
+ // e.g. udp://[::1]:1234 for only receiving from localhost.
+ if (!source.empty()) {
+ // Single-Source Multicast (SSM).
+ group_source_req gsr;
+ memset(&gsr, 0, sizeof(gsr));
+ if (!parse_ip_address(group, &gsr.gsr_group)) {
+ return false;
+ }
+ if (!parse_ip_address(source, &gsr.gsr_source)) {
+ return false;
+ }
+ int level = (gsr.gsr_group.ss_family == AF_INET) ? SOL_IP : SOL_IPV6;
+ if (setsockopt(sock, level, MCAST_JOIN_SOURCE_GROUP, &gsr, sizeof(gsr)) == -1) {
+ log_perror("setsockopt(MCAST_JOIN_SOURCE_GROUP)");
+ return false;
+ }
+ } else {
+ // Any-Source Multicast (ASM).
+ group_req gr;
+ memset(&gr, 0, sizeof(gr));
+ if (!parse_ip_address(group, &gr.gr_group)) {
+ return false;
+ }
+ int level = (gr.gr_group.ss_family == AF_INET) ? SOL_IP : SOL_IPV6;
+ if (setsockopt(sock, level, MCAST_JOIN_GROUP, &gr, sizeof(gr)) == -1) {
+ log_perror("setsockopt(MCAST_JOIN_GROUP)");
+ return false;
+ }
+ }
+
+ return true;
+}
+
+} // namespace
+
+UDPInput::UDPInput(const string &url)
+ : url(url),
sock(-1)
{
// Should be verified by the caller.
string protocol;
- bool ok = parse_url(url, &protocol, &host, &port, &path);
+ bool ok = parse_url(url, &protocol, &user, &host, &port, &path);
assert(ok);
construct_header();
+
+ pthread_mutex_init(&stats_mutex, NULL);
+ stats.url = url;
+ stats.bytes_received = 0;
+ stats.data_bytes_received = 0;
+ stats.connect_time = time(NULL);
}
UDPInput::UDPInput(const InputProto &serialized)
- : stream_id(serialized.stream_id()),
- url(serialized.url()),
+ : url(serialized.url()),
sock(serialized.sock())
{
// Should be verified by the caller.
string protocol;
- bool ok = parse_url(url, &protocol, &host, &port, &path);
+ bool ok = parse_url(url, &protocol, &user, &host, &port, &path);
assert(ok);
construct_header();
+
+ pthread_mutex_init(&stats_mutex, NULL);
+ stats.url = url;
+ stats.bytes_received = serialized.bytes_received();
+ stats.data_bytes_received = serialized.data_bytes_received();
+ if (serialized.has_connect_time()) {
+ stats.connect_time = serialized.connect_time();
+ } else {
+ stats.connect_time = time(NULL);
+ }
}
InputProto UDPInput::serialize() const
{
InputProto serialized;
- serialized.set_stream_id(stream_id);
serialized.set_url(url);
serialized.set_sock(sock);
+ serialized.set_bytes_received(stats.bytes_received);
+ serialized.set_data_bytes_received(stats.data_bytes_received);
+ serialized.set_connect_time(stats.connect_time);
return serialized;
}
void UDPInput::close_socket()
{
- int ret;
- do {
- ret = close(sock);
- } while (ret == -1 && errno == EINTR);
-
- if (ret == -1) {
- perror("close()");
- }
-
+ safe_close(sock);
sock = -1;
}
void UDPInput::construct_header()
{
- string header =
+ http_header =
"HTTP/1.0 200 OK\r\n"
"Content-type: application/octet-stream\r\n"
"Cache-control: no-cache\r\n"
"Server: " SERVER_IDENTIFICATION "\r\n"
- "\r\n";
- servers->set_header(stream_id, header);
+ "Connection: close\r\n";
+}
+
+void UDPInput::add_destination(int stream_index)
+{
+ stream_indices.push_back(stream_index);
+ servers->set_header(stream_index, http_header, "");
}
void UDPInput::do_work()
{
- while (!should_stop) {
+ while (!should_stop()) {
if (sock == -1) {
int port_num = atoi(port.c_str());
- sock = create_server_socket(port_num, UDP_SOCKET);
+ sockaddr_in6 addr = CreateAnyAddress(port_num);
+ sock = create_server_socket(addr, UDP_SOCKET);
if (sock == -1) {
- fprintf(stderr, "WARNING: UDP socket creation failed. Waiting 0.2 seconds and trying again...\n");
+ log(WARNING, "[%s] UDP socket creation failed. Waiting 0.2 seconds and trying again...",
+ url.c_str());
usleep(200000);
continue;
}
- }
- // Since we are non-blocking, we need to wait for the right state first.
- // Wait up to 50 ms, then check should_stop.
- pollfd pfd;
- pfd.fd = sock;
- pfd.events = POLLIN;
+ // The syntax udp://source@group (abusing the username field
+ // to store the sender in SSM) seems to be a VLC invention.
+ // We mimic it.
+ if (!maybe_join_multicast_group(sock, host, user)) {
+ log(WARNING, "[%s] Multicast join failed. Waiting 0.2 seconds and trying again...",
+ url.c_str());
+ safe_close(sock);
+ sock = -1;
+ usleep(200000);
+ continue;
+ }
+ }
- int nfds = poll(&pfd, 1, 50);
- if (nfds == 0 || (nfds == -1 && errno == EINTR)) {
+ // Wait for a packet, or a wakeup.
+ bool activity = wait_for_activity(sock, POLLIN, NULL);
+ if (!activity) {
+ // Most likely, should_stop was set.
continue;
}
- if (nfds == -1) {
- perror("poll");
- close_socket();
- continue;
- }
- char buf[4096];
int ret;
do {
- ret = recv(sock, buf, sizeof(buf), 0);
+ ret = recv(sock, packet_buf, sizeof(packet_buf), 0);
} while (ret == -1 && errno == EINTR);
if (ret <= 0) {
- perror("recv");
+ log_perror("recv");
close_socket();
continue;
}
+
+ {
+ MutexLock lock(&stats_mutex);
+ stats.bytes_received += ret;
+ stats.data_bytes_received += ret;
+ }
- servers->add_data(stream_id, buf, ret);
+ for (size_t i = 0; i < stream_indices.size(); ++i) {
+ servers->add_data(stream_indices[i], packet_buf, ret, SUITABLE_FOR_STREAM_START);
+ }
}
}
+
+InputStats UDPInput::get_stats() const
+{
+ MutexLock lock(&stats_mutex);
+ return stats;
+}
projects / cubemap / blobdiff