Re: bin/60325: unbound emits warning: so-sndbuf 4194304 was not granted

["Michael van Elst via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR bin/60325; it has been noted by GNATS.

From: mlelstv%serpens.de@localhost (Michael van Elst)
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: bin/60325: unbound emits warning: so-sndbuf 4194304 was not granted
Date: Fri, 12 Jun 2026 19:48:48 -0000 (UTC)

 gnats-admin%NetBSD.org@localhost ("roy%marples.name@localhost via gnats") writes:
 
 >warning: so-sndbuf 4194304 was not granted. Got 9216. To fix: s
 >tart with root permissions(linux) or sysctl bigger net.core.wmem_max(linux) or kern.ipc.maxs
 >ockbuf(bsd) values. or set so-sndbuf: 0 (use system value).
 
 
 No idea why unbound even tries to set the sndbuf.
 
 There is no direct equivalent of net.core.wmem_max, but the value that
 it "got" and probably wants to override is net.inet.udp.sendspace.
 
 That however is
 
 /* 
  * For send - really max datagram size; for receive - 40 1K datagrams.
  */     
 static int udp_sendspace = 9216;
 static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
 
 
 A program should not assume that there is a deep write buffer for UDP.