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unix: fix udp sendmmsg fallback path (#4849)

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Fix a logic bug in the fallback code for platforms that don't have a
sendmmsg-like system call. It only sent at most one packet, even when
there were more available, and that was observable through a failing
test on such systems.

Fixes: https://github.com/libuv/libuv/issues/4848
This commit is contained in:
Ben Noordhuis 2025-07-29 01:06:40 +02:00 committed by GitHub
parent aee30bd8d0
commit 33b192c845
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GPG Key ID: B5690EEEBB952194
1 changed files with 4 additions and 4 deletions
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8
src/unix/udp.c
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@ -661,10 +661,10 @@ int uv__udp_try_send(uv_udp_t* handle,
}
err = uv__udp_sendmsg1(handle->io_watcher.fd, bufs, nbufs, addr);
if (err > 0)
return uv__count_bufs(bufs, nbufs);
if (err)
return err;
return err;
return uv__count_bufs(bufs, nbufs);
}
@ -1295,7 +1295,7 @@ static int uv__udp_sendmsg1(int fd,
/* UDP sockets don't EOF so we don't have to handle r=0 specially,
* that only happens when the input was a zero-sized buffer.
*/
return 1;
return 0;
}