#include <vlc_demux.h>
#include <vlc_aout.h>
#include <vlc_network.h>
+#ifdef HAVE_POLL
+# include <poll.h>
+#endif
#include <vlc_plugin.h>
#include <vlc_codecs.h>
#include "rtp.h"
+#include <srtp.h>
#define RTP_CACHING_TEXT N_("RTP de-jitter buffer length (msec)")
#define RTP_CACHING_LONGTEXT N_( \
"How long to wait for late RTP packets (and delay the performance)." )
+#define SRTP_KEY_TEXT N_("SRTP key (hexadecimal)")
+#define SRTP_KEY_LONGTEXT N_( \
+ "RTP packets will be authenticated and deciphered "\
+ "with this Secure RTP master shared secret key.")
+
+#define SRTP_SALT_TEXT N_("SRTP salt (hexadecimal)")
+#define SRTP_SALT_LONGTEXT N_( \
+ "Secure RTP requires a (non-secret) master salt value.")
+
#define RTP_MAX_SRC_TEXT N_("Maximum RTP sources")
#define RTP_MAX_SRC_LONGTEXT N_( \
"How many distinct active RTP sources are allowed at a time." )
add_integer ("rtp-caching", 1000, NULL, RTP_CACHING_TEXT,
RTP_CACHING_LONGTEXT, true);
change_integer_range (0, 65535);
+ add_string ("srtp-key", "", NULL,
+ SRTP_KEY_TEXT, SRTP_KEY_LONGTEXT, false);
+ add_string ("srtp-salt", "", NULL,
+ SRTP_SALT_TEXT, SRTP_SALT_LONGTEXT, false);
add_integer ("rtp-max-src", 1, NULL, RTP_MAX_SRC_TEXT,
RTP_MAX_SRC_LONGTEXT, true);
change_integer_range (1, 255);
RTP_MAX_MISORDER_LONGTEXT, true);
change_integer_range (0, 32767);
+ add_shortcut ("dccp");
+ /*add_shortcut ("sctp");*/
+ add_shortcut ("rtptcp"); /* "tcp" is already taken :( */
add_shortcut ("rtp");
+ add_shortcut ("udplite");
vlc_module_end ();
/*
* - support for access_filter in case of stream_Demux (MPEG-TS)
*/
+#ifndef IPPROTO_DCCP
+# define IPPROTO_DCCP 33 /* IANA */
+#endif
+
+#ifndef IPPROTO_UDPLITE
+# define IPPROTO_UDPLITE 136 /* from IANA */
+#endif
+
+
/*
* Local prototypes
*/
static int Open (vlc_object_t *obj)
{
demux_t *demux = (demux_t *)obj;
+ int tp; /* transport protocol */
- if (strcmp (demux->psz_access, "rtp"))
+ if (!strcmp (demux->psz_access, "dccp"))
+ tp = IPPROTO_DCCP;
+ else
+ if (!strcmp (demux->psz_access, "rtptcp"))
+ tp = IPPROTO_TCP;
+ else
+ if (!strcmp (demux->psz_access, "rtp"))
+ tp = IPPROTO_UDP;
+ else
+ if (!strcmp (demux->psz_access, "udplite"))
+ tp = IPPROTO_UDPLITE;
+ else
return VLC_EGENERIC;
char *tmp = strdup (demux->psz_path);
dport = 5004; /* avt-profile-1 port */
/* Try to connect */
- int fd = net_OpenDgram (obj, dhost, dport, shost, sport,
- AF_UNSPEC, IPPROTO_UDP);
+ int fd = -1, rtcp_fd = -1;
+
+ switch (tp)
+ {
+ case IPPROTO_UDP:
+ case IPPROTO_UDPLITE:
+ fd = net_OpenDgram (obj, dhost, (dport + 1) & ~1,
+ shost, (sport + 1) & ~1, AF_UNSPEC, tp);
+ if (fd == -1)
+ break;
+ rtcp_fd = net_OpenDgram (obj, dhost, dport | 1, shost,
+ sport ? (sport | 1) : 0, AF_UNSPEC, tp);
+ break;
+
+ case IPPROTO_DCCP:
+#ifndef SOCK_DCCP /* provisional API (FIXME) */
+# ifdef __linux__
+# define SOCK_DCCP 6
+# endif
+#endif
+#ifdef SOCK_DCCP
+ var_Create (obj, "dccp-service", VLC_VAR_STRING);
+ var_SetString (obj, "dccp-service", "RTPV"); /* FIXME: RTPA? */
+ fd = net_Connect (obj, shost, (sport + 1) & ~1, SOCK_DCCP, tp);
+#else
+ msg_Err (obj, "DCCP support not included");
+#endif
+ break;
+
+ case IPPROTO_TCP:
+ fd = net_Connect (obj, shost, (sport + 1) & ~1, SOCK_STREAM, tp);
+ break;
+ }
+
free (tmp);
if (fd == -1)
return VLC_EGENERIC;
+ net_SetCSCov (fd, -1, 12);
/* Initializes demux */
demux_sys_t *p_sys = malloc (sizeof (*p_sys));
if (p_sys == NULL)
- goto error;
+ {
+ net_Close (fd);
+ if (rtcp_fd != -1)
+ net_Close (rtcp_fd);
+ return VLC_EGENERIC;
+ }
+ p_sys->srtp = NULL;
+ p_sys->fd = fd;
+ p_sys->rtcp_fd = rtcp_fd;
p_sys->caching = var_CreateGetInteger (obj, "rtp-caching");
p_sys->max_src = var_CreateGetInteger (obj, "rtp-max-src");
p_sys->timeout = var_CreateGetInteger (obj, "rtp-timeout");
p_sys->max_dropout = var_CreateGetInteger (obj, "rtp-max-dropout");
p_sys->max_misorder = var_CreateGetInteger (obj, "rtp-max-misorder");
p_sys->autodetect = true;
+ p_sys->framed_rtp = (tp == IPPROTO_TCP);
demux->pf_demux = Demux;
demux->pf_control = Control;
if (p_sys->session == NULL)
goto error;
- p_sys->fd = fd;
+ char *key = var_CreateGetNonEmptyString (demux, "srtp-key");
+ if (key)
+ {
+ p_sys->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
+ SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
+ if (p_sys->srtp == NULL)
+ {
+ free (key);
+ goto error;
+ }
+
+ char *salt = var_CreateGetNonEmptyString (demux, "srtp-salt");
+ errno = srtp_setkeystring (p_sys->srtp, key, salt ? salt : "");
+ free (salt);
+ free (key);
+ if (errno)
+ {
+ msg_Err (obj, "bad SRTP key/salt combination (%m)");
+ goto error;
+ }
+ }
+
return VLC_SUCCESS;
error:
- net_Close (fd);
- free (p_sys);
+ Close (obj);
return VLC_EGENERIC;
}
demux_t *demux = (demux_t *)obj;
demux_sys_t *p_sys = demux->p_sys;
- rtp_session_destroy (demux, p_sys->session);
+ if (p_sys->srtp)
+ srtp_destroy (p_sys->srtp);
+ if (p_sys->session)
+ rtp_session_destroy (demux, p_sys->session);
+ if (p_sys->rtcp_fd != -1)
+ net_Close (p_sys->rtcp_fd);
net_Close (p_sys->fd);
free (p_sys);
}
/**
- * Gets a datagram from the network
+ * Checks if a file descriptor is hung up.
+ */
+static bool fd_dead (int fd)
+{
+ struct pollfd ufd = { .fd = fd, };
+
+ return (poll (&ufd, 1, 0) == 1) && (ufd.revents & POLLHUP);
+}
+
+
+/**
+ * Gets a datagram from the network, or NULL in case of fatal error.
*/
static block_t *rtp_dgram_recv (demux_t *demux, int fd)
{
block_t *block = block_Alloc (0xffff);
+ ssize_t len;
- ssize_t len = net_Read (VLC_OBJECT (demux), fd, NULL,
- block->p_buffer, block->i_buffer, false);
- if (len == -1)
+ do
{
- block_Release (block);
- return NULL;
+ len = net_Read (VLC_OBJECT (demux), fd, NULL,
+ block->p_buffer, block->i_buffer, false);
+ if (((len <= 0) && fd_dead (fd))
+ || !vlc_object_alive (demux))
+ {
+ block_Release (block);
+ return NULL;
+ }
}
+ while (len == -1);
+
return block_Realloc (block, 0, len);
}
+/**
+ * Gets a framed RTP packet, or NULL in case of fatal error.
+ */
+static block_t *rtp_stream_recv (demux_t *demux, int fd)
+{
+ ssize_t len = 0;
+ uint8_t hdr[2]; /* frame header */
+
+ /* Receives the RTP frame header */
+ do
+ {
+ ssize_t val = net_Read (VLC_OBJECT (demux), fd, NULL,
+ hdr + len, 2 - len, false);
+ if (val <= 0)
+ return NULL;
+ len += val;
+ }
+ while (len < 2);
+
+ block_t *block = block_Alloc (GetWBE (hdr));
+
+ /* Receives the RTP packet */
+ for (ssize_t i = 0; i < len;)
+ {
+ ssize_t val;
+
+ val = net_Read (VLC_OBJECT (demux), fd, NULL,
+ block->p_buffer + i, block->i_buffer - i, false);
+ if (val <= 0)
+ {
+ block_Release (block);
+ return NULL;
+ }
+ i += val;
+ }
+
+ return block;
+}
+
/*
* Generic packet handlers
* Static payload types handler
*/
+/* PT=0
+ * PCMU: G.711 µ-law (RFC3551)
+ */
+static void *pcmu_init (demux_t *demux)
+{
+ es_format_t fmt;
+
+ es_format_Init (&fmt, AUDIO_ES, VLC_FOURCC ('u', 'l', 'a', 'w'));
+ fmt.audio.i_rate = 8000;
+ fmt.audio.i_channels = 1;
+ return codec_init (demux, &fmt);
+}
+
+/* PT=8
+ * PCMA: G.711 A-law (RFC3551)
+ */
+static void *pcma_init (demux_t *demux)
+{
+ es_format_t fmt;
+
+ es_format_Init (&fmt, AUDIO_ES, VLC_FOURCC ('a', 'l', 'a', 'w'));
+ fmt.audio.i_rate = 8000;
+ fmt.audio.i_channels = 1;
+ return codec_init (demux, &fmt);
+}
+
+/* PT=10,11
+ * L16: 16-bits (network byte order) PCM
+ */
+static void *l16s_init (demux_t *demux)
+{
+ es_format_t fmt;
+
+ es_format_Init (&fmt, AUDIO_ES, VLC_FOURCC ('s', '1', '6', 'b'));
+ fmt.audio.i_rate = 44100;
+ fmt.audio.i_channels = 2;
+ return codec_init (demux, &fmt);
+}
+
+static void *l16m_init (demux_t *demux)
+{
+ es_format_t fmt;
+
+ es_format_Init (&fmt, AUDIO_ES, VLC_FOURCC ('s', '1', '6', 'b'));
+ fmt.audio.i_rate = 44100;
+ fmt.audio.i_channels = 1;
+ return codec_init (demux, &fmt);
+}
+
/* PT=14
* MPA: MPEG Audio (RFC2250, §3.4)
*/
demux_sys_t *p_sys = demux->p_sys;
block_t *block;
- block = rtp_dgram_recv (demux, p_sys->fd);
- if (block)
- {
- /* Not using SDP, we need to guess the payload format used */
- if (p_sys->autodetect && block->i_buffer >= 2)
- {
- rtp_pt_t pt = {
- .init = NULL,
- .destroy = codec_destroy,
- .decode = codec_decode,
- .frequency = 0,
- .number = block->p_buffer[1] & 0x7f,
- };
-
- switch (pt.number)
- {
- case 14:
- msg_Dbg (demux, "detected MPEG Audio over RTP");
- pt.init = mpa_init;
- pt.decode = mpa_decode;
- pt.frequency = 44100;
- break;
+ block = p_sys->framed_rtp
+ ? rtp_stream_recv (demux, p_sys->fd)
+ : rtp_dgram_recv (demux, p_sys->fd);
+ if (!block)
+ return 0;
- case 32:
- msg_Dbg (demux, "detected MPEG Video over RTP");
- pt.init = mpv_init;
- pt.decode = mpv_decode;
- pt.frequency = 90000;
- break;
+ if (block->i_buffer < 2)
+ goto drop;
- case 33:
- msg_Dbg (demux, "detected MPEG2 TS over RTP");
- pt.init = ts_init;
- pt.destroy = stream_destroy;
- pt.decode = stream_decode;
- pt.frequency = 90000;
- break;
+ const uint8_t ptype = block->p_buffer[1] & 0x7F;
+ if (ptype >= 72 && ptype <= 76)
+ goto drop; /* Muxed RTCP, ignore for now */
- case 72: /* muxed SR */
- case 73: /* muxed RR */
- case 74: /* muxed SDES */
- case 75: /* muxed BYE */
- case 76: /* muxed APP */
- default:
- block_Release (block); /* ooh! ignoring RTCP is evil! */
- return 1;
- }
- rtp_add_type (demux, p_sys->session, &pt);
- p_sys->autodetect = false;
+ if (p_sys->srtp)
+ {
+ size_t len = block->i_buffer;
+ if (srtp_recv (p_sys->srtp, block->p_buffer, &len))
+ {
+ msg_Dbg (demux, "SRTP authentication/decryption failed");
+ goto drop;
}
+ block->i_buffer = len;
+ }
- rtp_receive (demux, p_sys->session, block);
+ /* Not using SDP, we need to guess the payload format used */
+ /* see http://www.iana.org/assignments/rtp-parameters */
+ if (p_sys->autodetect)
+ {
+ rtp_pt_t pt = {
+ .init = NULL,
+ .destroy = codec_destroy,
+ .decode = codec_decode,
+ .frequency = 0,
+ .number = ptype,
+ };
+ switch (ptype)
+ {
+ case 0:
+ msg_Dbg (demux, "detected G.711 mu-law");
+ pt.init = pcmu_init;
+ pt.frequency = 8000;
+ break;
+
+ case 8:
+ msg_Dbg (demux, "detected G.711 A-law");
+ pt.init = pcma_init;
+ pt.frequency = 8000;
+ break;
+
+ case 10:
+ msg_Dbg (demux, "detected stereo PCM");
+ pt.init = l16s_init;
+ pt.frequency = 44100;
+ break;
+
+ case 11:
+ msg_Dbg (demux, "detected mono PCM");
+ pt.init = l16m_init;
+ pt.frequency = 44100;
+ break;
+
+ case 14:
+ msg_Dbg (demux, "detected MPEG Audio");
+ pt.init = mpa_init;
+ pt.decode = mpa_decode;
+ pt.frequency = 90000;
+ break;
+
+ case 32:
+ msg_Dbg (demux, "detected MPEG Video");
+ pt.init = mpv_init;
+ pt.decode = mpv_decode;
+ pt.frequency = 90000;
+ break;
+
+ case 33:
+ msg_Dbg (demux, "detected MPEG2 TS");
+ pt.init = ts_init;
+ pt.destroy = stream_destroy;
+ pt.decode = stream_decode;
+ pt.frequency = 90000;
+ break;
+
+ default:
+ goto drop;
+ }
+ rtp_add_type (demux, p_sys->session, &pt);
+ p_sys->autodetect = false;
}
+ rtp_receive (demux, p_sys->session, block);
+ return 1;
+drop:
+ block_Release (block);
return 1;
}
projects / vlc / blobdiff