[FFmpeg-devel] [PATCH 16/18] avformat/tls: make passing an external socket universal
Timo Rothenpieler
timo at rothenpieler.org
Wed Jul 2 19:56:44 EEST 2025
---
libavformat/tls.h | 11 +++++------
libavformat/tls_openssl.c | 14 ++++++++++----
libavformat/whip.c | 4 ++--
3 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/libavformat/tls.h b/libavformat/tls.h
index 83d6b1ab6e..1ab115aa81 100644
--- a/libavformat/tls.h
+++ b/libavformat/tls.h
@@ -57,15 +57,14 @@ typedef struct TLSShared {
char underlying_host[200];
int numerichost;
+ int external_sock;
+ URLContext *udp;
URLContext *tcp;
int is_dtls;
enum DTLSState state;
- int use_external_udp;
- URLContext *udp;
-
/* The certificate and private key content used for DTLS handshake */
char* cert_buf;
char* key_buf;
@@ -89,14 +88,14 @@ typedef struct TLSShared {
{"listen", "Listen for incoming connections", offsetof(pstruct, options_field . listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = TLS_OPTFL }, \
{"verifyhost", "Verify against a specific hostname", offsetof(pstruct, options_field . host), AV_OPT_TYPE_STRING, .flags = TLS_OPTFL }, \
{"http_proxy", "Set proxy to tunnel through", offsetof(pstruct, options_field . http_proxy), AV_OPT_TYPE_STRING, .flags = TLS_OPTFL }, \
- {"use_external_udp", "Use external UDP from muxer or demuxer", offsetof(pstruct, options_field . use_external_udp), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 1, .flags = TLS_OPTFL }, \
- {"mtu", "Maximum Transmission Unit", offsetof(pstruct, options_field . mtu), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = TLS_OPTFL }
+ {"mtu", "Maximum Transmission Unit", offsetof(pstruct, options_field . mtu), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = TLS_OPTFL }, \
+ {"external_sock", "Use external socket", offsetof(pstruct, options_field . external_sock), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 1, .flags = TLS_OPTFL }
int ff_tls_open_underlying(TLSShared *c, URLContext *parent, const char *uri, AVDictionary **options);
int ff_url_read_all(const char *url, AVBPrint *bp);
-int ff_dtls_set_udp(URLContext *h, URLContext *udp);
+int ff_tls_set_external_socket(URLContext *h, URLContext *sock);
int ff_dtls_export_materials(URLContext *h, char *dtls_srtp_materials, size_t materials_sz);
diff --git a/libavformat/tls_openssl.c b/libavformat/tls_openssl.c
index 2049eb021b..5805513065 100644
--- a/libavformat/tls_openssl.c
+++ b/libavformat/tls_openssl.c
@@ -502,10 +502,16 @@ static const char* openssl_get_error(TLSContext *ctx)
return ctx->error_message;
}
-int ff_dtls_set_udp(URLContext *h, URLContext *udp)
+int ff_tls_set_external_socket(URLContext *h, URLContext *sock)
{
TLSContext *c = h->priv_data;
- c->tls_shared.udp = udp;
+ TLSShared *s = &c->tls_shared;
+
+ if (s->is_dtls)
+ c->tls_shared.udp = sock;
+ else
+ c->tls_shared.tcp = sock;
+
return 0;
}
@@ -980,7 +986,7 @@ static int dtls_start(URLContext *h, const char *url, int flags, AVDictionary **
#endif
init_bio_method(h);
- if (p->tls_shared.use_external_udp != 1) {
+ if (p->tls_shared.external_sock != 1) {
if ((ret = ff_tls_open_underlying(&p->tls_shared, h, url, options)) < 0) {
av_log(p, AV_LOG_ERROR, "Failed to connect %s\n", url);
return ret;
@@ -1004,7 +1010,7 @@ static int dtls_start(URLContext *h, const char *url, int flags, AVDictionary **
*
* The SSL_do_handshake can't be called if DTLS hasn't prepare for udp.
*/
- if (p->tls_shared.use_external_udp != 1) {
+ if (p->tls_shared.external_sock != 1) {
ret = dtls_handshake(h);
// Fatal SSL error, for example, no available suite when peer is DTLS 1.0 while we are DTLS 1.2.
if (ret < 0) {
diff --git a/libavformat/whip.c b/libavformat/whip.c
index 84d4c5a1f3..e109469a4f 100644
--- a/libavformat/whip.c
+++ b/libavformat/whip.c
@@ -387,7 +387,7 @@ static av_cold int dtls_initialize(AVFormatContext *s)
{
WHIPContext *whip = s->priv_data;
/* reuse the udp created by whip */
- ff_dtls_set_udp(whip->dtls_uc, whip->udp);
+ ff_tls_set_external_socket(whip->dtls_uc, whip->udp);
return 0;
}
@@ -1297,7 +1297,7 @@ next_packet:
av_dict_set(&opts, "key_file", whip->key_file, 0);
} else
av_dict_set(&opts, "key_pem", whip->key_buf, 0);
- av_dict_set_int(&opts, "use_external_udp", 1, 0);
+ av_dict_set_int(&opts, "external_sock", 1, 0);
av_dict_set_int(&opts, "listen", 1, 0);
/* If got the first binding response, start DTLS handshake. */
ret = ffurl_open_whitelist(&whip->dtls_uc, buf, AVIO_FLAG_READ_WRITE, &s->interrupt_callback,
--
2.49.0
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