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module-rtp: improve session setup

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This commit is contained in:
Wim Taymans 2023-03-01 11:40:11 +01:00
parent dda5ed696b
commit 94b67603e5
1 changed files with 97 additions and 20 deletions
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117
src/modules/module-rtp-session.c
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@ -189,12 +189,24 @@ struct session {
char *name; char *name;
unsigned we_initiated:1;
#define SESSION_STATE_INIT 0
#define SESSION_STATE_SENDING_CTRL_IN 1
#define SESSION_STATE_SENDING_DATA_IN 2
#define SESSION_STATE_ESTABLISHING 3
#define SESSION_STATE_ESTABLISHED 4
int state;
uint32_t initiator; uint32_t initiator;
uint32_t remote_ssrc; uint32_t remote_ssrc;
uint32_t ssrc; uint32_t ssrc;
uint32_t ts_offset; uint32_t ts_offset;
unsigned sending:1;
unsigned receiving:1;
unsigned ctrl_ready:1; unsigned ctrl_ready:1;
unsigned data_ready:1; unsigned data_ready:1;
}; };
@ -270,6 +282,7 @@ static void send_apple_midi_cmd_in(struct session *sess, bool ctrl)
struct iovec iov[3]; struct iovec iov[3];
struct msghdr msg; struct msghdr msg;
struct rtp_apple_midi hdr; struct rtp_apple_midi hdr;
int fd;
spa_zero(hdr); spa_zero(hdr);
hdr.cmd = htonl(APPLE_MIDI_CMD_IN); hdr.cmd = htonl(APPLE_MIDI_CMD_IN);
@ -283,12 +296,21 @@ static void send_apple_midi_cmd_in(struct session *sess, bool ctrl)
iov[1].iov_len = strlen(impl->session_name)+1; iov[1].iov_len = strlen(impl->session_name)+1;
spa_zero(msg); spa_zero(msg);
msg.msg_name = ctrl ? &sess->ctrl_addr : &sess->data_addr; if (ctrl) {
msg.msg_namelen = ctrl ? sess->ctrl_len : sess->data_len; msg.msg_name = &sess->ctrl_addr;
msg.msg_namelen = sess->ctrl_len;
fd = impl->ctrl_source->fd;
sess->state = SESSION_STATE_SENDING_CTRL_IN;
} else {
msg.msg_name = &sess->data_addr;
msg.msg_namelen = sess->data_len;
fd = impl->data_source->fd;
sess->state = SESSION_STATE_SENDING_DATA_IN;
}
msg.msg_iov = iov; msg.msg_iov = iov;
msg.msg_iovlen = 2; msg.msg_iovlen = 2;
send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg); send_packet(fd, &msg);
} }
static void send_apple_midi_cmd_by(struct session *sess, bool ctrl) static void send_apple_midi_cmd_by(struct session *sess, bool ctrl)
@ -316,6 +338,39 @@ static void send_apple_midi_cmd_by(struct session *sess, bool ctrl)
send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg); send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg);
} }
static void session_establish(struct session *sess)
{
switch (sess->state) {
case SESSION_STATE_INIT:
/* we initiate */
sess->we_initiated = true;
if (!sess->ctrl_ready)
send_apple_midi_cmd_in(sess, true);
else if (!sess->data_ready)
send_apple_midi_cmd_in(sess, false);
break;
case SESSION_STATE_ESTABLISHING:
case SESSION_STATE_ESTABLISHED:
/* we're done or waiting for other initiator */
break;
case SESSION_STATE_SENDING_CTRL_IN:
case SESSION_STATE_SENDING_DATA_IN:
/* we're busy initiating */
break;
}
}
static void session_stop(struct session *sess)
{
if (!sess->we_initiated)
return;
if (sess->ctrl_ready)
send_apple_midi_cmd_by(sess, true);
if (sess->data_ready)
send_apple_midi_cmd_by(sess, false);
sess->state = SESSION_STATE_INIT;
}
static void send_destroy(void *data) static void send_destroy(void *data)
{ {
} }
@ -327,15 +382,12 @@ static void send_state_changed(void *data, bool started, const char *error)
pw_log_info("send initiator:%08x state %d", sess->initiator, started); pw_log_info("send initiator:%08x state %d", sess->initiator, started);
if (started) { if (started) {
if (!sess->ctrl_ready) sess->sending = true;
send_apple_midi_cmd_in(sess, true); session_establish(sess);
else if (!sess->data_ready)
send_apple_midi_cmd_in(sess, false);
} else { } else {
if (sess->ctrl_ready) sess->sending = false;
send_apple_midi_cmd_by(sess, true); if (!sess->receiving)
if (sess->data_ready) session_stop(sess);
send_apple_midi_cmd_by(sess, false);
} }
} }
@ -366,15 +418,12 @@ static void recv_state_changed(void *data, bool started, const char *error)
pw_log_info("send initiator:%08x state %d", sess->initiator, started); pw_log_info("send initiator:%08x state %d", sess->initiator, started);
if (started) { if (started) {
if (!sess->ctrl_ready) sess->receiving = true;
send_apple_midi_cmd_in(sess, true); session_establish(sess);
else if (!sess->data_ready)
send_apple_midi_cmd_in(sess, false);
} else { } else {
if (sess->ctrl_ready) sess->receiving = false;
send_apple_midi_cmd_by(sess, true); if (!sess->sending)
if (sess->data_ready) session_stop(sess);
send_apple_midi_cmd_by(sess, false);
} }
} }
@ -550,6 +599,7 @@ static void parse_apple_midi_cmd_in(struct impl *impl, bool ctrl, uint8_t *buffe
sess->ctrl_addr = *sa; sess->ctrl_addr = *sa;
sess->ctrl_len = salen; sess->ctrl_len = salen;
sess->ctrl_ready = true; sess->ctrl_ready = true;
sess->state = SESSION_STATE_ESTABLISHING;
} }
} }
else { else {
@ -562,6 +612,7 @@ static void parse_apple_midi_cmd_in(struct impl *impl, bool ctrl, uint8_t *buffe
sess->data_addr = *sa; sess->data_addr = *sa;
sess->data_len = salen; sess->data_len = salen;
sess->data_ready = true; sess->data_ready = true;
sess->state = SESSION_STATE_ESTABLISHED;
} }
} }
@ -596,7 +647,7 @@ static void parse_apple_midi_cmd_ok(struct impl *impl, bool ctrl, uint8_t *buffe
struct session *sess; struct session *sess;
sess = find_session_by_initiator(impl, initiator); sess = find_session_by_initiator(impl, initiator);
if (sess == NULL) { if (sess == NULL || !sess->we_initiated) {
pw_log_warn("received OK from nonexisting session %u", initiator); pw_log_warn("received OK from nonexisting session %u", initiator);
return; return;
} }
@ -610,6 +661,7 @@ static void parse_apple_midi_cmd_ok(struct impl *impl, bool ctrl, uint8_t *buffe
pw_log_info("got data OK %08x", initiator); pw_log_info("got data OK %08x", initiator);
sess->remote_ssrc = ntohl(hdr->ssrc); sess->remote_ssrc = ntohl(hdr->ssrc);
sess->data_ready = true; sess->data_ready = true;
sess->state = SESSION_STATE_ESTABLISHED;
} }
} }
@ -665,6 +717,28 @@ static void parse_apple_midi_cmd_ck(struct impl *impl, bool ctrl, uint8_t *buffe
send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg); send_packet(ctrl ? impl->ctrl_source->fd : impl->data_source->fd, &msg);
} }
static void parse_apple_midi_cmd_by(struct impl *impl, bool ctrl, uint8_t *buffer,
ssize_t len, struct sockaddr_storage *sa, socklen_t salen)
{
struct rtp_apple_midi *hdr = (struct rtp_apple_midi*)buffer;
uint32_t initiator = ntohl(hdr->initiator);
struct session *sess;
sess = find_session_by_initiator(impl, initiator);
if (sess == NULL) {
pw_log_warn("received BY from nonexisting initiator %08x", initiator);
return;
}
if (ctrl) {
pw_log_info("got ctrl BY %08x %d", initiator, sess->data_ready);
sess->ctrl_ready = false;
} else {
pw_log_info("got data BY %08x", initiator);
sess->data_ready = false;
}
}
static void parse_apple_midi_cmd(struct impl *impl, bool ctrl, uint8_t *buffer, static void parse_apple_midi_cmd(struct impl *impl, bool ctrl, uint8_t *buffer,
ssize_t len, struct sockaddr_storage *sa, socklen_t salen) ssize_t len, struct sockaddr_storage *sa, socklen_t salen)
{ {
@ -679,6 +753,9 @@ static void parse_apple_midi_cmd(struct impl *impl, bool ctrl, uint8_t *buffer,
case APPLE_MIDI_CMD_CK: case APPLE_MIDI_CMD_CK:
parse_apple_midi_cmd_ck(impl, ctrl, buffer, len, sa, salen); parse_apple_midi_cmd_ck(impl, ctrl, buffer, len, sa, salen);
break; break;
case APPLE_MIDI_CMD_BY:
parse_apple_midi_cmd_by(impl, ctrl, buffer, len, sa, salen);
break;
default: default:
break; break;
} }