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tiny-rtsp-server.pl
executable file
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tiny-rtsp-server.pl
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#!/usr/bin/perl
#-------------------------------------------------------------------------------
my $VERSION = '0.80';
my $LAST_UPDATE = '2023.04.05';
my $SERVER_NAME = "Tiny RTSP Server Ver$VERSION - $LAST_UPDATE";
################################################################################
# V4L2 RTP Server compress with ffmpeg.
################################################################################
use 5.8.1;
use strict;
use Fcntl;
use Socket;
use threads;
use threads::shared;
use Time::HiRes;
use Digest::MD5;
use MIME::Base64;
################################################################################
my $DEBUG = 0;
my $PRINT = 1;
my $BIND = '*';
my $PORT = 8554;
my $USE_UDP = 1;
my $TIMEOUT = 3;
my $AUTH_ID = '';
my $AUTH_PASS = '';
my $AUTH_REALM= 'TinyRtspServer';
my $TIMESTAMP = 0;
my $PARSE_VPS = 1;
#-------------------------------------------------------------------------------
# RTSP/RTP
#-------------------------------------------------------------------------------
my $RTP_SSRC = 0x12345678;
my $RTP_SSRC_BIN = pack('N', $RTP_SSRC);
my $RTP_SESSION = "tsession";
my $SPLIT_NAL_U = 0;
my $RTP_MAX_SIZE = 65000;
#-------------------------------------------------------------------------------
# Codec
#-------------------------------------------------------------------------------
my $INPUT = '/dev/video0';
my $IN_FORMAT = 'v4l2';
my $CODEC = 'H265';
my $WIDTH = 640;
my $HEIGHT = 360;
my $FPS = 30;
my $KEYINT = undef;
my $BITRATE = "500k";
my $TIMEBASE = 1000;
my $FFM_OPTION = '-pix_fmt yuv420p'; # for libde265.js
my $FFM_VCODEC = undef;
my $FFM_VCOPY = 0;
#-------------------------------------------------------------------------------
# Encoder info
#-------------------------------------------------------------------------------
my @NAL_NAME;
# H265
$NAL_NAME[32] = 'vps';
$NAL_NAME[33] = 'sps';
$NAL_NAME[34] = 'pps';
# H264
$NAL_NAME[6] = 'vps';
$NAL_NAME[7] = 'sps';
$NAL_NAME[8] = 'pps';
my %CO_INFO = (
H264 => { id => 'avc1', lib => 'libx264', v4l2fmt => 'h264' },
H265 => { id => 'hvc1', lib => 'libx265', v4l2fmt => 'hevc' }
);
#-------------------------------------------------------------------------------
# command line options
#-------------------------------------------------------------------------------
{
my $HELP;
my @ary;
my $err='';
while(@ARGV) {
my $x = shift(@ARGV);
#---------------------------------------------------------------
# General
#---------------------------------------------------------------
if ($x eq '-q') { $PRINT = 0; next; }
if ($x eq '-d') { $PRINT = $DEBUG = 1; next; }
if ($x eq '-dd') { $PRINT = $DEBUG = 2; next; }
if ($x eq '-h') { $HELP = 1; next; }
#---------------------------------------------------------------
# RTSP server
#---------------------------------------------------------------
if ($x eq '-b') { $BIND = shift(@ARGV); next; }
if ($x eq '-p') {
$PORT = shift(@ARGV);
if ($PORT !~ /^\d+$/) { $err .= "Invalid port: $PORT\n"; }
next;
}
if ($x eq '-t') {
$TIMEOUT = shift(@ARGV);
if ($TIMEOUT <= 0 || $TIMEOUT !~ /^\d+$/) { $err .= "Invalid timeout: $TIMEOUT\n"; }
next;
}
if ($x eq '-ai') { $AUTH_ID = shift(@ARGV); next; }
if ($x eq '-ap') { $AUTH_PASS = shift(@ARGV); next; }
if ($x eq '-u') { $USE_UDP = 1; next; }
if ($x eq '-u0') { $USE_UDP = 0; next; }
if ($x eq '-sn') { $SPLIT_NAL_U = 0; next; }
#---------------------------------------------------------------
# Codec
#---------------------------------------------------------------
if ($x eq '-264'){ $CODEC = 'H264'; next; }
if ($x eq '-265'){ $CODEC = 'H265'; next; }
if ($x eq '-i') { $INPUT = shift(@ARGV) =~ s/\s//rg; next; }
if ($x eq '-f') { $IN_FORMAT = shift(@ARGV) =~ s/\s//rg; next; }
if ($x eq '-s') {
my $size = shift(@ARGV);
if ($size !~ /^(\d+)x(\d+)$/) { $err .= "Invalid size: $size\n"; }
$WIDTH = $1;
$HEIGHT = $2;
next;
}
if ($x eq '-vb') {
$BITRATE = shift(@ARGV);
if ($BITRATE !~ /^\d+(?:\.\d+)?(?:[KkMm]|)$/) { $err .= "Invalid bitrate: $BITRATE\n"; }
next;
}
if ($x eq '-r') {
$FPS = shift(@ARGV);
if ($FPS !~ /^\d+$/) { $err .= "Invalid fps: $FPS\n"; }
next;
}
if ($x eq '-g') {
$KEYINT = shift(@ARGV);
if ($KEYINT !~ /^\d+$/) { $err .= "Invalid keyframe interval: $KEYINT\n"; }
next;
}
if ($x eq '-ts') { $TIMESTAMP = 1; next; }
if ($x eq '-fo') { $FFM_OPTION = shift(@ARGV); next; }
if ($x eq '-vc') { $FFM_VCODEC = shift(@ARGV) =~ s/\s//rg; next; }
if ($x eq '-cc') { $FFM_VCOPY = 1; next; }
push(@ary, $x);
}
if ($HELP) {
print <<HELP;
Usage: $0 [options]
General options:
-q Quiet (sileint mode)
-d Debug mode
-dd Debug mode (verbose)
-h View this help
Server options:
-b ip Bind IP address (default:*)
-p port RTSP listen port number (default:8554)
-t sec Timeout for RTSP connection (default:3)
-ai id Digest authentication id
-ap pass Digest authentication password
-u Use UDP/RTP (default)
-u0 Not use UDP/RTP
-sn Split RTP packets by NAL units
Codec options:
-264 Encode with H.264/libx264
-265 Encode with H.265/libx265 (default)
-s WxH Video frame size (default:640x360)
-vb bitrate Video bitrate (default:500k)
-r rate Frame rate, fps (default:30)
-g int Keyframe interval (default:=fps)
-i device Input device (default:/dev/video0)
-f format Input device format (default:v4l2)
-ts Embed timestamp in video stream
-fo opt FFmpeg extra options (default:"-pix_fmt yuv420p")
-vc codec Force set ffmpeg video codec.
-cc Use camera's built-in codec. Ignore options: -vb -ts
HELP
exit;
}
if (@ary) {
$err .= "Unknown options: " . join(' ',@ary) . "\n";
}
if ($err) {
$PRINT && print STDERR $err;
exit(1);
}
}
{
my $y = substr($LAST_UPDATE,0,4);
$PRINT && print "$SERVER_NAME (C)$y nabe\@abk\n\n";
}
#-------------------------------------------------------------------------------
# Bind rtsp port
#-------------------------------------------------------------------------------
my $srv;
my ($usock, $UPORT);
my ($urtcp, $URPORT);
{
if ($BIND =~ /^unix:(.*)/) {
#-----------------------------------------------------
# UNIX domain socket
#-----------------------------------------------------
my $name = $1;
socket($srv, PF_UNIX, SOCK_STREAM, 0) || die "socket failed: $!";
unlink($name);
bind($srv, sockaddr_un($name)) || die "bind '$BIND' failed: $!";
chmod(0777, $name);
$SIG{INT} = sub {
unlink($name);
exit;
};
} else {
#-----------------------------------------------------
# TCP/IP socket
#-----------------------------------------------------
my $ip = $BIND eq '*' ? INADDR_ANY : inet_aton($BIND);
socket($srv, PF_INET, SOCK_STREAM, getprotobyname('tcp')) || die "socket failed: $!";
setsockopt($srv, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)) || die "setsockopt failed: $!";
bind($srv, sockaddr_in($PORT, $ip)) || die "bind '$BIND:$PORT' failed: $!";
if ($USE_UDP) {
foreach(0..10) {
socket($usock, PF_INET, SOCK_DGRAM, getprotobyname('udp')) || die "UDP socket failed: $!";
bind($usock, pack_sockaddr_in(0, $ip)) || die "UDP bind failed: $!";
$UPORT = (unpack_sockaddr_in(getsockname($usock)))[0];
socket($urtcp, PF_INET, SOCK_DGRAM, getprotobyname('udp')) || die "UDP socket failed: $!";
my $r = bind($urtcp, pack_sockaddr_in($UPORT+1, $ip));
if (!$r) {
if ($_==10) { die "UDP bind failed: $!"; }
close($usock);
close($urtcp);
next;
}
$URPORT = (unpack_sockaddr_in(getsockname($urtcp)))[0];
last;
}
}
}
listen($srv, SOMAXCONN) || die "listen failed: $!";
$PRINT && print "RTSP Listen: $BIND:$PORT" . ($USE_UDP ? " UDP/RTP $BIND:$UPORT UDP/RTCP $BIND:$URPORT" : '') . "\n";
}
#-------------------------------------------------------------------------------
# open ffmpeg and video device
#-------------------------------------------------------------------------------
my $ffmpeg;
{
my $cinfo= $CO_INFO{$CODEC};
my $clib = $FFM_VCODEC || $cinfo->{lib};
#-----------------------------------------------------
# check ffmpeg
#-----------------------------------------------------
open(my $fh, "ffmpeg -v quiet -codecs|");
my @ary = <$fh>;
close($fh);
if (!@ary) {
print STDERR "\"ffmpeg\" command not found! Please install ffmpeg.\n";
exit(2);
}
my $found;
foreach(@ary) {
if ($_ !~ /encoders: *(.*)/) { next; }
if (grep { $_ eq $clib } split(/\s+/, $1)) {
$found=1;
last;
}
}
if (!$found) {
print STDERR "\"ffmpeg\" is not support \"$clib\" ($CODEC)\n";
exit(3);
}
#-----------------------------------------------------
# open pipe
#-----------------------------------------------------
my @cmd;
if ($FFM_VCOPY) {
# copy from camera's bultin codec
@cmd = (
'ffmpeg', '-v', $PRINT ? 'error' : 'quiet',
'-f', $IN_FORMAT, '-s', "${WIDTH}x${HEIGHT}", '-r', $FPS, '-pix_fmt', $cinfo->{v4l2fmt}, '-i', $INPUT,
'-vcodec', 'copy', split(/ +/, $FFM_OPTION),
'-f', 'rawvideo', 'pipe:1'
);
} else {
# Normal
my $timestamp = $TIMESTAMP ? "-vf \"settb=AVTB,"
. "setpts='trunc(PTS/1K)*1K+st(1,trunc(RTCTIME/1K))-1K*trunc(ld(1)/1K)',"
. "drawtext='fontsize=36:x=8:y=8:text=%{localtime\\:%X}.%{eif\\:1M*t-1K*trunc(t*1K)\\:d\\:3}'\"" : '';
@cmd = (
'ffmpeg', '-v', $PRINT ? 'error' : 'quiet',
'-f', $IN_FORMAT, '-s', "${WIDTH}x${HEIGHT}", '-r', $FPS, '-i', $INPUT,
$timestamp, '-c', $clib, '-g', $KEYINT ? $KEYINT : $FPS, '-vb', $BITRATE,
'-fflags', 'nobuffer', '-tune', 'zerolatency', split(/ +/, $FFM_OPTION),
'-f', 'rawvideo', 'pipe:1'
);
}
$ffmpeg = &safe_pipe_open(@cmd);
binmode($ffmpeg);
#-----------------------------------------------------
# set non blocking I/O
#-----------------------------------------------------
my $flags;
fcntl($ffmpeg, F_GETFL, $flags);
$flags |= O_NONBLOCK;
fcntl($ffmpeg, F_SETFL, $flags);
}
#-------------------------------------------------------------------------------
# main loop
#-------------------------------------------------------------------------------
my $srv_fno = fileno($srv);
my $ffmpeg_fno = fileno($ffmpeg);
my $vec;
vec($vec, $srv_fno, 1) = 1;
vec($vec, $ffmpeg_fno, 1) = 1;
my $urtcp_fno;
if ($USE_UDP) {
$urtcp_fno = fileno($urtcp);
vec($vec, $urtcp_fno, 1) = 1;
}
my %clients :shared;
my %closed :shared;
my %start;
my %socks;
my $rtp_seq = 0;
my %vinfo;
$SIG{PIPE} = 'IGNORE';
while(1) {
my $r = select(my $in=$vec, undef, undef, undef);
if ($r == -1) {
die "select error: $!";
}
foreach(keys(%closed)) {
close($socks{$_});
delete $socks{$_};
delete $closed{$_};
delete $clients{$_};
}
if (vec($in, $srv_fno, 1)) {
my $addr = accept(my $sock, $srv);
if (!$addr) { next; }
my ($cl, $ip) = &addr2cl($addr);
my $thr = threads->create(\&client, $sock, $cl, $ip);
if (!defined $thr) { die "threads->create fail!"; }
$thr->detach();
my $tid = $thr->tid();
$socks{$tid} = $sock;
}
if (vec($in, $ffmpeg_fno, 1)) {
my $data;
my $r = sysread($ffmpeg, $data, 0x1000000);
if (!$r) {
print STDERR "ffmpeg is die!\n";
exit(10);
}
while(16383<$r) {
$r = sysread($ffmpeg, $data, 0x1000000, length($data));
}
&send_rtsp_packet($data);
if ($PARSE_VPS) {
my $p=0;
while (0 <= ($p = index($data, "\0\0\0\1", $p))) { # parse VPS/PPS/SPS
$p+=4;
my $x = ord(substr($data, $p, 1));
my $t;
if ($CODEC eq 'H265') { $t = ($x & 0x7e)>>1; }
elsif ($CODEC eq 'H264') { $t = $x & 0x1f; }
my $n = $NAL_NAME[$t];
if (!$n) { next; }
my $x = index($data, "\0\0\1", $p);
if (substr($data,$x,1) eq "\0") { $x--; }
if ($x<0) {
$vinfo{$n} = substr($data, $p);
$p = length($data);
} else {
$vinfo{$n} = substr($data, $p, $x-$p);
$p = $x;
}
(1<$DEBUG) && &log('', "Found $n: " . unpack('H*', $vinfo{$n}));
}
}
}
if ($USE_UDP && vec($in, $urtcp_fno, 1)) { # RTCP: RFC3550, section 6
&rtcp_recive();
}
}
exit;
#-------------------------------------------------------------------------------
# send rtsp
#-------------------------------------------------------------------------------
sub send_rtsp_packet {
my $data = shift;
if ($data eq '') { return; }
my $tm = &get_rtp_timestamp();
my $split_u = $RTP_MAX_SIZE<length($data) || $SPLIT_NAL_U;
while(length($data)) {
my $unit;
my $x = $split_u ? index($data, "\0\0\0\1", 4) : -100;
if ($x<0) {
$unit = $data;
$data = '';
} else {
$unit = substr($data, 0, $x);
$data = substr($data, $x);
}
if (%clients) {
&do_send_rtsp_packet($tm, $unit, $RTP_MAX_SIZE);
}
}
}
sub do_send_rtsp_packet {
my $tm = shift;
my $data = shift;
my $max = (shift) -15 -8; # -15: RTP Header and Frag size, -8:RTSP Header
my $len = length($data);
my $p = 0;
if (substr($data,0,4) eq "\0\0\0\1") { $p=4; $len -=4; }
my $nal_type = (ord(substr($data, $p, 1)) & 0x7e) >>1;
my $nal_b1 = substr($data, $p+1, 1);
my $frags = int(($len-1)/$max);
foreach(0..$frags) {
my $size = $max<$len ? $max : $len;
my $frag_header = '';
if ($frags) { # rewrite nal header
$frag_header
= "\x62" # Fragmentation Units
. $nal_b1
. chr(($_==0 ? 0x80 : 0) | ($_==$frags ? 0x40 : 0) | $nal_type);
if ($_==0) { # first packet
$p += 2;
$size -= 2;
}
}
my $rtp_header
= "\x80\x60" # type=96 (fix)
. pack('n', ++$rtp_seq) # Sequence number
. pack('N', $tm) # timestamp
. $RTP_SSRC_BIN # ssrc
;
my $rtp_packet = $rtp_header . $frag_header . substr($data, $p, $size);
my $rtp_size = length($rtp_packet);
my $rtsp_packet;
$len -= $size;
$p += $size;
my $tcp_c=0;
my $udp_c=0;
foreach(keys(%clients)) {
my $addr = $clients{$_};
if ($addr eq '1') { # TCP/RTSP
$rtsp_packet ||= "\$\0" . pack('n', $rtp_size) . $rtp_packet;
send($socks{$_}, $rtsp_packet, 0);
$tcp_c++;
next;
}
# UDP/RTP
send($usock, $rtp_packet, 0, $addr);
$udp_c++;
}
(1<$DEBUG) && &log("[$tm] ", "[Send] RTSP($tcp_c)/RTP($udp_c) seq=$rtp_seq size=$rtp_size Nal=$nal_type frag=$frags");
}
}
sub get_rtp_timestamp {
my ($utc, $usec) = Time::HiRes::gettimeofday();
my $tm = ($utc*$TIMEBASE + int($usec*$TIMEBASE/1000000)) & 0xffffffff;
return wantarray ? ($tm, $utc, $usec) : $tm;
}
#-------------------------------------------------------------------------------
# rtcp
#-------------------------------------------------------------------------------
sub rtcp_recive {
my $data;
my $addr = recv($urtcp, $data, 0x10000, 0);
my $cl = &addr2cl($addr);
my $h0 = ord(substr($data,0,1));
my $h1 = ord(substr($data,1,1));
if (($h0 & 0xf0) != 0x80) { next; } # Do not support
my $size = unpack('n', substr($data,2,2))*4;
$DEBUG && &log($cl, "[RTCP:Recive] PT=$h1 size=$size");
# make Sender report
my ($tm, $utc, $usec) = &get_rtp_timestamp();
my $usec_fixp = int($usec * (1<<32)/1000000);
my $packet
= "\x80\xC8" # 0xC0=200 sender report
. pack('n', 6) # size/4 (real packet size-4)
. $RTP_SSRC_BIN # ssrc
. pack('N', $utc + 2208988800) # NTP timestamp MSW
. pack('N', $usec_fixp) # NTP timestamp LSW
. pack('N', $tm) # RTP timestamp
. "\0\0\0\0" # sender's packet count
. "\0\0\0\0" # sender's packet octet
;
send($urtcp, $packet, 0, $addr);
$DEBUG && &log($cl, "[RTCP:Send] PT=200 size=24");
}
################################################################################
# Server main
################################################################################
sub client {
my $sock = shift;
my $cl = shift;
my $cl_ip= shift;
binmode($sock);
setsockopt($sock, Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1);
fcntl($sock, F_GETFL, my $flags);
fcntl($sock, F_SETFL, $flags | O_NONBLOCK);
&log($cl, 'New RTSP connection');
&client_main($sock, $cl, $cl_ip);
&log($cl, 'Close RTSP connection');
my $tid = threads::tid();
$closed{$tid} = 1;
return;
}
#-------------------------------------------------------------------------------
# RTSP Server
#-------------------------------------------------------------------------------
sub client_main {
my $sock = shift;
my $cl = shift;
my $cl_ip= shift;
my $nonce = $AUTH_ID ne '' && &generate_nonce();
my $play;
my $udp_port;
while(1) {
my ($req, $h, $err) = &recieve_rtsp_request($sock, $cl, $play ? 0 : $TIMEOUT);
if ($err) { return; }
if (!$req) { next; }
my $res = &make_rtsp_response_base($h);
my $body ='';
if ($req =~ /^TEARDOWN /i) {
&send_rtsp_response($sock, $cl, $res, $body);
return;
}
if ($nonce && $req =~ m!(DESCRIBE|SETUP|PLAY)\s+([^\s]+)?!i) {
my $method = $1;
my $uri = $2;
my $auth = $h->{authorization};
my $auth_ok;
while($auth) {
if ($auth !~ /^digest (.*)/i) { last; };
my @ary = split(/\s*,\s*/, $1);
my %opt;
foreach(@ary) {
if ($_ =~ /^([^=]+)="([^\"]+)"$/) {
my $k = $1;
$k =~ tr/A-Z/a-z/;
$opt{$k} = $2;
}
}
$opt{method} = $method;
$opt{uri} =~ s|/+$||;
$uri =~ s|/+$||;
if ($opt{realm} ne $AUTH_REALM) { last; }
if ($opt{nonce} ne $nonce) { last; }
if ($opt{uri} ne $uri) { last; }
$auth_ok = &auth_digest(\%opt);
last;
}
if (!$auth_ok) {
$res->[0] = 'RTSP/1.0 401 Unauthorized';
push(@$res, "WWW-Authenticate: Digest realm=\"$AUTH_REALM\", nonce=\"$nonce\"");
&send_rtsp_response($sock, $cl, $res, $body);
next;
}
}
if ($req =~ m|^OPTIONS |) {
push(@$res, 'Public: OPTIONS,DESCRIBE,TEARDOWN,SETUP,PLAY');
} elsif ($req =~ m|^DESCRIBE rtsp://([^\s]+)|i) {
push(@$res, 'Content-Type: application/sdp');
push(@$res, "Content-Base: rtsp://$1");
my $fmtp='';
if ($CODEC eq 'H264') {
$fmtp .= 'profile-level-id=' . ($vinfo{sps} ? unpack('H*', substr($vinfo{sps},1,3)) : '64001E');
if ($vinfo{sps} || $vinfo{pps}) {
my $sps = encode_base64($vinfo{sps}, '');
my $pps = encode_base64($vinfo{pps}, '');
$fmtp .= ";sprop-parameter-sets=$sps,$pps";
}
} else {
foreach(keys(%vinfo)) {
$fmtp .= "sprop-$_=" . encode_base64($vinfo{$_}, '') . ';';
}
chop($fmtp);
}
$body = <<BODY =~ s/\n/\r\n/rg;
v=0
a=control:*
a=range:npt=0-
m=video 0 RTP/AVP 96
a=rtpmap:96 $CODEC/$TIMEBASE
a=framesize:96 $WIDTH-$HEIGHT
a=framerate:$FPS
a=fmtp:96 $fmtp
BODY
} elsif ($req =~ m|^SETUP |i) {
if ($h->{transport} =~ m|^(RTP/AVP(?:/UDP))?;.*(client_port=(\d+)-\d+)|i) {
if ($USE_UDP) {
$udp_port = $3;
my @addr = unpack_sockaddr_in(getsockname($sock));
my $srv_ip = inet_ntoa($addr[1]);
my $ss = sprintf("%08X", $RTP_SSRC);
push(@$res, "Transport: RTP/AVP;unicast;source=$srv_ip;$2;server_port=$UPORT-$URPORT");
} else {
$res->[0] = 'RTSP/1.0 445 Method Not Valid In This State';
}
} else {
push(@$res, 'Transport: RTP/AVP/TCP;unicast;interleaved=0-1');
}
push(@$res, "Session: $RTP_SESSION");
} elsif ($req =~ m|^PLAY |i) {
push(@$res, 'Range: npt=0.000-');
&send_rtsp_response($sock, $cl, $res, $body);
if ($play) { next; }
$play=1;
my $tid = threads::tid();
if ($udp_port) {
$clients{$tid} = pack_sockaddr_in($udp_port, inet_aton($cl_ip));
} else {
$clients{$tid} = 1;
}
next;
} else {
$res->[0] = 'RTSP/1.0 400 Bad Request';
}
&send_rtsp_response($sock, $cl, $res, $body);
}
}
#-------------------------------------------------------------------------------
# RTSP subroutine
#-------------------------------------------------------------------------------
sub recieve_rtsp_request {
my $sock = shift;
my $cl = shift;
my $timeout = shift;
my $vec;
vec($vec, fileno($sock), 1)=1;
my $limit = time + $timeout;
my @lines;
my $data='';
while (index($data, "\r\n\r\n")<0) {
select(my $in=$vec, undef, undef, $timeout ? 1 : undef);
my $bytes = sysread($sock, $data, 0x100000, length($data));
if ($data eq "\r\n") { last; }
if ($timeout) {
if ($bytes) { next; }
if (time<$limit) { next; }
&log($cl, "Connection timeout!");
return (undef, undef, 1);
}
# not set timeout
if (!$bytes) {
return (undef, undef, -1); # close connection
}
}
substr($data, index($data, "\r\n\r\n")) = ''; # VLC bug?
while(substr($data,0,2) eq "\$\1") { # VLC bug?
my $s = unpack('n', substr($data,2,2));
$data = substr($data, $s+4);
}
my ($req, @lines) = split(/\r\n/, $data);
$DEBUG && &log($cl,"[Recive] $req");
my %h;
foreach(@lines) {
$DEBUG && &log($cl,"[Recive] $_");
if ($_ =~ /^([\w\-]+):\s+(.*)/) {
my $name = $1;
$name =~ tr/A-Z/a-z/;
$h{$name} = $2;
}
}
$DEBUG && &log($cl,"[Recive] ");
if ($req eq '' || $h{cseq} eq '') {
&send_rtsp_response($sock, $cl, &make_rtsp_response_base(\%h, 'RTSP/1.0 400 Bad Request'));
$req = undef;
}
return ($req, \%h);
}
sub make_rtsp_response_base {
my $h = shift;
my @res = (shift || 'RTSP/1.0 200 OK');
if ($h->{cseq} ne '') { push(@res, "CSeq: $h->{cseq}"); }
if ($h->{session}) { push(@res, "Session: $h->{session}"); }
push(@res, "User-Agent: $SERVER_NAME");
return \@res;
}
sub send_rtsp_response {
my $sock = shift;
my $cl = shift;
my $res = shift;
my $body = shift;
if ($body ne '') {
push(@$res, 'Content-length: ' . length($body));
}
push(@$res, '');
if ($DEBUG) { foreach(@$res,split(/\r\n/, $body)) { &log($cl, "[Send] $_"); } }
my $data .= join("\r\n", @$res) . "\r\n" . $body;
syswrite($sock, $data, length($data));
}
sub auth_digest {
my $h = shift;
my $uid = &encode_uricom($AUTH_ID);
my $upass = &encode_uricom($AUTH_PASS);
my $ha1 = Digest::MD5::md5_hex("$uid:$h->{realm}:$upass");
my $ha2 = Digest::MD5::md5_hex("$h->{method}:$h->{uri}");
my $res = Digest::MD5::md5_hex("$ha1:$h->{nonce}:$ha2");
return $h->{response} eq $res;
}
################################################################################
# Subroutine
################################################################################
sub safe_pipe_open { # https://perldoc.perl.org/perlipc#Safe-Pipe-Opens
my @cmd = grep { $_ ne '' } @_;
&log('Open: ' . join(' ', @cmd));
my $pid = open(my $fh, "-|"); # fork
if (!defined $pid) {
die "cannot open pipe: $!";
}
if ($pid) { # parent
return $fh;
}
# child
close(STDERR);
exec { $cmd[0] } @cmd;
die "exit $cmd[0]";
}
sub addr2cl {
my $addr = shift;
my ($port, $ip_bin) = unpack_sockaddr_in($addr);
my $ip = inet_ntoa($ip_bin);
my $cl = "[$ip:$port] ";
return wantarray ? ($cl, $ip) : $cl;
}
sub generate_nonce {
my $len = shift || 24;
my $base = 'zcHKPvGgsXMdmV3wSi5TrNt1kqCuAyU8RfoZYx0ln426JWahj_pELB7IDO9b-eQF';
my $str = '';
foreach(1..$len) {
$str .= substr($base, int(rand(64)), 1);
}
return $str;
}
sub decode_uri {
my $x = shift;
$x =~ tr/+/ /;
$x =~ s/%([0-9a-fA-F][0-9a-fA-F])/chr(hex($1))/eg;
return $x;
}
sub encode_uricom {
my $x = shift;
$x =~ s/([^\w!\(\)\*\-\.\~:])/'%' . unpack('H2',$1)/eg;
return $x;
}
sub log {
my ($s,$m,$h,$d,$m,$y) = localtime(time());
my $tm = sprintf("%04d-%02d-%02d %02d:%02d:%02d", $y+1900, $m+1, $d, $h, $m, $s);
print join('', "$tm ", @_, "\n");
}