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Events: support for SO_SNDBUF on outbound peer connections

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ngx_event_connect_peer() honors SO_RCVBUF via pc->rcvbuf but had
no equivalent for SO_SNDBUF.  This adds pc->sndbuf and the matching
setsockopt() call, mirroring the existing SO_RCVBUF path.
Both setsockopt() calls are made non-fatal.

Existing callers leaving sndbuf at 0 retain prior behavior, since
setsockopt() is only invoked when the field is non-zero.  These
fields are consumed by various proxying modules in follow-up commits.
This commit is contained in:
Patrik Wall 2026-04-30 14:43:49 +02:00 • committed by Sergey Kandaurov
parent a277069b14
commit 3fe9fc4573
2 changed files with 16 additions and 3 deletions
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18
src/event/ngx_event_connect.c
View file

@ -65,11 +65,23 @@ ngx_event_connect_peer(ngx_peer_connection_t *pc)
if (pc->rcvbuf) {
if (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
(const void *) &pc->rcvbuf, sizeof(int)) == -1)
(const void *) &pc->rcvbuf, sizeof(int))
== -1)
{
ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
"setsockopt(SO_RCVBUF) failed");
goto failed;
"setsockopt(SO_RCVBUF, %d) failed, ignored",
pc->rcvbuf);
}
}
if (pc->sndbuf) {
if (setsockopt(s, SOL_SOCKET, SO_SNDBUF,
(const void *) &pc->sndbuf, sizeof(int))
== -1)
{
ngx_log_error(NGX_LOG_ALERT, pc->log, ngx_socket_errno,
"setsockopt(SO_SNDBUF, %d) failed, ignored",
pc->sndbuf);
}
}

1
src/event/ngx_event_connect.h
View file

@ -57,6 +57,7 @@ struct ngx_peer_connection_s {
int type;
int rcvbuf;
int sndbuf;
ngx_log_t *log;