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Fix calls to sendmsg()

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Align cmsg buffers properly and use MSG_NOSIGNAL.
This commit is contained in:
Demi Marie Obenour 2022-07-30 16:48:27 -04:00 • committed by Wim Taymans
parent 90c955c223
commit c1920163d5
3 changed files with 12 additions and 6 deletions
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2
spa/plugins/avb/avb-pcm.c
View file

@ -877,7 +877,7 @@ static int flush_write(struct state *state, uint64_t current_time)
SPA_AVBTP_PACKET_AAF_SET_SEQ_NUM(pdu, state->pdu_seq++);
SPA_AVBTP_PACKET_AAF_SET_TIMESTAMP(pdu, ptime);
n = sendmsg(state->sockfd, &state->msg, 0);
n = sendmsg(state->sockfd, &state->msg, MSG_NOSIGNAL);
if (n < 0 || n != (ssize_t)state->pdu_size) {
spa_log_error(state->log, "sendmdg() failed: %m");
}

2
src/modules/module-avb/stream.c
View file

@ -136,7 +136,7 @@ static int flush_write(struct stream *stream, uint64_t current_time)
p->timestamp = ptime;
p->dbc = dbc;
n = sendmsg(stream->source->fd, &stream->msg, 0);
n = sendmsg(stream->source->fd, &stream->msg, MSG_NOSIGNAL);
if (n < 0 || n != (ssize_t)stream->pdu_size) {
pw_log_error("sendmsg() failed %zd != %zd: %m",
n, stream->pdu_size);

14
src/modules/module-protocol-native/connection.c
View file

@ -221,7 +221,10 @@ static int refill_buffer(struct pw_protocol_native_connection *conn, struct buff
struct cmsghdr *cmsg = NULL;
struct msghdr msg = { 0 };
struct iovec iov[1];
char cmsgbuf[CMSG_SPACE(MAX_FDS_MSG * sizeof(int))];
union {
char cmsgbuf[CMSG_SPACE(MAX_FDS_MSG * sizeof(int))];
struct cmsghdr align;
} cmsgbuf;
int n_fds = 0;
size_t avail;
@ -231,7 +234,7 @@ static int refill_buffer(struct pw_protocol_native_connection *conn, struct buff
iov[0].iov_len = avail;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = cmsgbuf;
msg.msg_control = &cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
msg.msg_flags = MSG_CMSG_CLOEXEC | MSG_DONTWAIT;
@ -755,7 +758,10 @@ int pw_protocol_native_connection_flush(struct pw_protocol_native_connection *co
struct msghdr msg = { 0 };
struct iovec iov[1];
struct cmsghdr *cmsg;
char cmsgbuf[CMSG_SPACE(MAX_FDS_MSG * sizeof(int))];
union {
char cmsgbuf[CMSG_SPACE(MAX_FDS_MSG * sizeof(int))];
struct cmsghdr align;
} cmsgbuf;
int res = 0, *fds;
uint32_t fds_len, to_close, n_fds, outfds, i;
struct buffer *buf;
@ -786,7 +792,7 @@ int pw_protocol_native_connection_flush(struct pw_protocol_native_connection *co
msg.msg_iovlen = 1;
if (outfds > 0) {
msg.msg_control = cmsgbuf;
msg.msg_control = &cmsgbuf;
msg.msg_controllen = CMSG_SPACE(fds_len);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;