(depends on Linux 3.13 or newer).
- Reflects anything VLC can reflect over HTTP, even the muxes VLC
has problems reflecting itself (in particular, FLV).
+ - Multicast support, both for sending and receiving (supports only protocols
+ that can go over UDP, e.g. MPEG-TS). Supports both ASM and SSM.
- IPv4 support. Yes, Cubemap even supports (some) legacy protocols.
Reflects anything VLC can reflect over HTTP, even the muxes VLC
has problems reflecting itself (in particular, FLV).
.IP \[bu]
+Multicast support, both for sending and receiving (supports only protocols
+that can go over UDP, e.g. MPEG-TS). Supports both ASM and SSM.
+.IP \[bu]
IPv4 support. Yes, Cubemap even supports (some) legacy protocols.
.SH OPTIONS
.TP
#
stream /test.flv src=http://gruessi.zrh.sesse.net:4013/test.flv
stream /test.flv.metacube src=http://gruessi.zrh.sesse.net:4013/test.flv encoding=metacube
-stream /udp.ts src=udp://@:1234 backlog_size=1048576 pacing_rate_kbit=2000
+stream /udp.ts src=udp://@:1234 backlog_size=1048576
+stream /udp-multicast.ts src=udp://@233.252.0.2:1234 pacing_rate_kbit=2000
udpstream [2001:67c:29f4::50]:5000 src=http://pannekake.samfundet.no:9094/frikanalen.ts.metacube
udpstream 193.35.52.50:5001 src=http://pannekake.samfundet.no:9094/frikanalen.ts.metacube
udpstream 233.252.0.1:5002 src=http://pannekake.samfundet.no:9094/frikanalen.ts.metacube ttl=32 multicast_output_interface=eth1
pending_data.resize(serialized.pending_data().size());
memcpy(&pending_data[0], serialized.pending_data().data(), serialized.pending_data().size());
- string protocol;
- parse_url(url, &protocol, &host, &port, &path); // Don't care if it fails.
+ string protocol, user;
+ parse_url(url, &protocol, &user, &host, &port, &path); // Don't care if it fails.
pthread_mutex_init(&stats_mutex, NULL);
stats.url = url;
}
{
- string protocol; // Thrown away.
- if (!parse_url(url, &protocol, &host, &port, &path)) {
+ string protocol, user; // Thrown away.
+ if (!parse_url(url, &protocol, &user, &host, &port, &path)) {
log(WARNING, "[%s] Failed to parse URL '%s'", url.c_str(), url.c_str());
break;
}
using namespace std;
+namespace {
+
+// Does not support passwords, only user:host, since this is really only used
+// to parse VLC's udp://source@multicastgroup:1234/ syntax (we do not support
+// even basic auth).
+void split_user_host(const string &user_host, string *user, string *host)
+{
+ size_t split = user_host.find("@");
+ if (split == string::npos) {
+ user->clear();
+ *host = user_host;
+ } else {
+ *user = string(user_host.begin(), user_host.begin() + split);
+ *host = string(user_host.begin() + split + 1, user_host.end());
+ }
+}
+
+} // namespace
+
// Extremely rudimentary URL parsing.
-bool parse_url(const string &url, string *protocol, string *host, string *port, string *path)
+bool parse_url(const string &url, string *protocol, string *user, string *host, string *port, string *path)
{
size_t split = url.find("://");
if (split == string::npos) {
split = rest.find_first_of(":/");
if (split == string::npos) {
// http://foo
- *host = rest;
+ split_user_host(rest, user, host);
*port = *protocol;
*path = "/";
return true;
}
- *host = string(rest.begin(), rest.begin() + split);
+ split_user_host(string(rest.begin(), rest.begin() + split), user, host);
char ch = rest[split]; // Colon or slash.
rest = string(rest.begin() + split + 1, rest.end());
Input *create_input(const std::string &url)
{
- string protocol, host, port, path;
- if (!parse_url(url, &protocol, &host, &port, &path)) {
+ string protocol, user, host, port, path;
+ if (!parse_url(url, &protocol, &user, &host, &port, &path)) {
return NULL;
}
if (protocol == "http") {
Input *create_input(const InputProto &serialized)
{
- string protocol, host, port, path;
- if (!parse_url(serialized.url(), &protocol, &host, &port, &path)) {
+ string protocol, user, host, port, path;
+ if (!parse_url(serialized.url(), &protocol, &user, &host, &port, &path)) {
return NULL;
}
if (protocol == "http") {
class InputProto;
// Extremely rudimentary URL parsing.
-bool parse_url(const std::string &url, std::string *protocol, std::string *host, std::string *port, std::string *path);
+bool parse_url(const std::string &url, std::string *protocol, std::string *user, std::string *host, std::string *port, std::string *path);
// Figure out the right type of input based on the URL, and create a new Input of the right type.
// Will return NULL if unknown.
extern ServerPool *servers;
+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();
{
// 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();
usleep(200000);
continue;
}
+
+ // 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;
+ }
}
// Wait for a packet, or a wakeup.
// The URL and its parsed components.
std::string url;
- std::string host, port, path;
+ std::string user, host, port, path;
// The HTTP header we're sending to clients.
std::string http_header;
projects / cubemap / commitdiff