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rtsp: Support RFC4570 (source specific multicast) more properly.

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Add support for domain names, for multiple source addresses,
for exclusions, and for session level specification of addresses.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Ed Torbett 2013-07-26 11:38:00 +01:00 committed by Martin Storsjö
parent 7497222090
commit 1f57d60129
2 changed files with 99 additions and 11 deletions
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99
libavformat/rtsp.c
View File

@ -286,8 +286,27 @@ typedef struct SDPParseState {
struct sockaddr_storage default_ip;
int default_ttl;
int skip_media; ///< set if an unknown m= line occurs
int nb_default_include_source_addrs; /**< Number of source-specific multicast include source IP address (from SDP content) */
struct RTSPSource **default_include_source_addrs; /**< Source-specific multicast include source IP address (from SDP content) */
int nb_default_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP address (from SDP content) */
struct RTSPSource **default_exclude_source_addrs; /**< Source-specific multicast exclude source IP address (from SDP content) */
} SDPParseState;
static void copy_default_source_addrs(struct RTSPSource **addrs, int count,
struct RTSPSource ***dest, int *dest_count)
{
RTSPSource *rtsp_src, *rtsp_src2;
int i;
for (i = 0; i < count; i++) {
rtsp_src = addrs[i];
rtsp_src2 = av_malloc(sizeof(*rtsp_src2));
if (!rtsp_src2)
continue;
memcpy(rtsp_src2, rtsp_src, sizeof(*rtsp_src));
dynarray_add(dest, dest_count, rtsp_src2);
}
}
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
int letter, const char *buf)
{
@ -298,6 +317,7 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
int payload_type, i;
AVStream *st;
RTSPStream *rtsp_st;
RTSPSource *rtsp_src;
struct sockaddr_storage sdp_ip;
int ttl;
@ -366,6 +386,15 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
rtsp_st->sdp_ip = s1->default_ip;
rtsp_st->sdp_ttl = s1->default_ttl;
copy_default_source_addrs(s1->default_include_source_addrs,
s1->nb_default_include_source_addrs,
&rtsp_st->include_source_addrs,
&rtsp_st->nb_include_source_addrs);
copy_default_source_addrs(s1->default_exclude_source_addrs,
s1->nb_default_exclude_source_addrs,
&rtsp_st->exclude_source_addrs,
&rtsp_st->nb_exclude_source_addrs);
get_word(buf1, sizeof(buf1), &p); /* port */
rtsp_st->sdp_port = atoi(buf1);
@ -495,22 +524,43 @@ static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
p += strspn(p, SPACE_CHARS);
if (av_strstart(p, "inline:", &p))
get_word(rtsp_st->crypto_params, sizeof(rtsp_st->crypto_params), &p);
} else if (av_strstart(p, "source-filter:", &p) && s->nb_streams > 0) {
} else if (av_strstart(p, "source-filter:", &p)) {
int exclude = 0;
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "incl"))
if (strcmp(buf1, "incl") && strcmp(buf1, "excl"))
return;
exclude = !strcmp(buf1, "excl");
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "IN") != 0)
return;
get_word(buf1, sizeof(buf1), &p);
if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6") && strcmp(buf1, "*"))
return;
// not checking that the destination address actually matches
// not checking that the destination address actually matches or is wildcard
get_word(buf1, sizeof(buf1), &p);
while (*p != '\0') {
rtsp_src = av_mallocz(sizeof(*rtsp_src));
if (!rtsp_src)
return;
get_word(rtsp_src->addr, sizeof(rtsp_src->addr), &p);
if (exclude) {
if (s->nb_streams == 0) {
dynarray_add(&s1->default_exclude_source_addrs, &s1->nb_default_exclude_source_addrs, rtsp_src);
} else {
rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
get_word(rtsp_st->source_addr, sizeof(rtsp_st->source_addr), &p);
dynarray_add(&rtsp_st->exclude_source_addrs, &rtsp_st->nb_exclude_source_addrs, rtsp_src);
}
} else {
if (s->nb_streams == 0) {
dynarray_add(&s1->default_include_source_addrs, &s1->nb_default_include_source_addrs, rtsp_src);
} else {
rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
dynarray_add(&rtsp_st->include_source_addrs, &rtsp_st->nb_include_source_addrs, rtsp_src);
}
}
}
} else {
if (rt->server_type == RTSP_SERVER_WMS)
ff_wms_parse_sdp_a_line(s, p);
@ -535,7 +585,7 @@ int ff_sdp_parse(AVFormatContext *s, const char *content)
{
RTSPState *rt = s->priv_data;
const char *p;
int letter;
int letter, i;
/* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
* contain long SDP lines containing complete ASF Headers (several
* kB) or arrays of MDPR (RM stream descriptor) headers plus
@ -572,6 +622,14 @@ int ff_sdp_parse(AVFormatContext *s, const char *content)
if (*p == '\n')
p++;
}
for (i = 0; i < s1->nb_default_include_source_addrs; i++)
av_free(s1->default_include_source_addrs[i]);
av_freep(&s1->default_include_source_addrs);
for (i = 0; i < s1->nb_default_exclude_source_addrs; i++)
av_free(s1->default_exclude_source_addrs[i]);
av_freep(&s1->default_exclude_source_addrs);
rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
if (!rt->p) return AVERROR(ENOMEM);
return 0;
@ -615,7 +673,7 @@ void ff_rtsp_undo_setup(AVFormatContext *s)
void ff_rtsp_close_streams(AVFormatContext *s)
{
RTSPState *rt = s->priv_data;
int i;
int i, j;
RTSPStream *rtsp_st;
ff_rtsp_undo_setup(s);
@ -625,6 +683,13 @@ void ff_rtsp_close_streams(AVFormatContext *s)
if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
rtsp_st->dynamic_handler->free(
rtsp_st->dynamic_protocol_context);
for (j = 0; j < rtsp_st->nb_include_source_addrs; j++)
av_free(rtsp_st->include_source_addrs[j]);
av_freep(&rtsp_st->include_source_addrs);
for (j = 0; j < rtsp_st->nb_exclude_source_addrs; j++)
av_free(rtsp_st->exclude_source_addrs[j]);
av_freep(&rtsp_st->exclude_source_addrs);
av_free(rtsp_st);
}
}
@ -2058,6 +2123,17 @@ static int sdp_probe(AVProbeData *p1)
return 0;
}
static void append_source_addrs(char *buf, int size, const char *name,
int count, struct RTSPSource **addrs)
{
int i;
if (!count)
return;
av_strlcatf(buf, size, "&%s=%s", name, addrs[0]->addr);
for (i = 1; i < count; i++)
av_strlcatf(buf, size, ",%s", addrs[i]->addr);
}
static int sdp_read_header(AVFormatContext *s)
{
RTSPState *rt = s->priv_data;
@ -2101,8 +2177,13 @@ static int sdp_read_header(AVFormatContext *s)
"?localport=%d&ttl=%d&connect=%d", rtsp_st->sdp_port,
rtsp_st->sdp_ttl,
rt->rtsp_flags & RTSP_FLAG_FILTER_SRC ? 1 : 0);
if (rtsp_st->source_addr[0])
av_strlcatf(url, sizeof(url), "&sources=%s", rtsp_st->source_addr);
append_source_addrs(url, sizeof(url), "sources",
rtsp_st->nb_include_source_addrs,
rtsp_st->include_source_addrs);
append_source_addrs(url, sizeof(url), "block",
rtsp_st->nb_exclude_source_addrs,
rtsp_st->exclude_source_addrs);
if (ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
&s->interrupt_callback, NULL) < 0) {
err = AVERROR_INVALIDDATA;

9
libavformat/rtsp.h
View File

@ -402,6 +402,10 @@ typedef struct RTSPState {
#define RTSP_FLAG_LISTEN 0x2 /**< Wait for incoming connections. */
#define RTSP_FLAG_CUSTOM_IO 0x4 /**< Do all IO via the AVIOContext. */
typedef struct RTSPSource {
char addr[128]; /**< Source-specific multicast include source IP address (from SDP content) */
} RTSPSource;
/**
* Describe a single stream, as identified by a single m= line block in the
* SDP content. In the case of RDT, one RTSPStream can represent multiple
@ -425,7 +429,10 @@ typedef struct RTSPStream {
//@{
int sdp_port; /**< port (from SDP content) */
struct sockaddr_storage sdp_ip; /**< IP address (from SDP content) */
char source_addr[100]; /**< Source-specific multicast source IP address (from SDP content) */
int nb_include_source_addrs; /**< Number of source-specific multicast include source IP addresses (from SDP content) */
struct RTSPSource **include_source_addrs; /**< Source-specific multicast include source IP addresses (from SDP content) */
int nb_exclude_source_addrs; /**< Number of source-specific multicast exclude source IP addresses (from SDP content) */
struct RTSPSource **exclude_source_addrs; /**< Source-specific multicast exclude source IP addresses (from SDP content) */
int sdp_ttl; /**< IP Time-To-Live (from SDP content) */
int sdp_payload_type; /**< payload type */
//@}