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- For windows crosscompile, fix setting the IPV6_MTU socket option

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equivalent (IPV6_USER_MTU); allows cross compiling with latest
  cross-compiler versions.
This commit is contained in:
George Thessalonikefs
2022-07-12 17:17:59 +02:00
parent 2abd6f7d58
commit 9e4a17baaf
2 changed files with 21 additions and 1 deletions
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doc/Changelog
+5
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@@ -1,3 +1,8 @@
12 July 2022: George
- For windows crosscompile, fix setting the IPV6_MTU socket option
equivalent (IPV6_USER_MTU); allows cross compiling with latest
cross-compiler versions.
12 July 2022: Wouter
- Fix dname count in sldns parse type descriptor for SVCB and HTTPS.
services/listen_dnsport.c
+16 -1
View File
@@ -490,6 +490,7 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
return -1;
}
# elif defined(IPV6_MTU)
# ifndef USE_WINSOCK
/*
* On Linux, to send no larger than 1280, the PMTUD is
* disabled by default for datagrams anyway, so we set
@@ -497,13 +498,27 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
*/
if (setsockopt(s, IPPROTO_IPV6, IPV6_MTU,
(void*)&mtu, (socklen_t)sizeof(mtu)) < 0) {
log_err("setsockopt(..., IPV6_MTU, ...) failed: %s",
log_err("setsockopt(..., IPV6_MTU, ...) failed: %s",
sock_strerror(errno));
sock_close(s);
*noproto = 0;
*inuse = 0;
return -1;
}
# elif defined(IPV6_USER_MTU)
/* As later versions of the mingw crosscompiler define
* IPV6_MTU, do the same for windows but use IPV6_USER_MTU
* instead which is writable; IPV6_MTU is readonly there. */
if (setsockopt(s, IPPROTO_IPV6, IPV6_USER_MTU,
(void*)&mtu, (socklen_t)sizeof(mtu)) < 0) {
log_err("setsockopt(..., IPV6_USER_MTU, ...) failed: %s",
wsa_strerror(WSAGetLastError()));
sock_close(s);
*noproto = 0;
*inuse = 0;
return -1;
}
# endif /* USE_WINSOCK */
# endif /* IPv6 MTU */
# if defined(IPV6_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
# if defined(IP_PMTUDISC_OMIT)