Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

net: platform-dependent default socket options

Browse source 
This CL revises existing platform-dependent default socket
options to make it possible to accomodate multiple multicast
datagram listeners on a single service port.

Also removes unnecessary SO_REUSEADDR, SO_REUSEPORT socket
options from unicast datagram sockets by default.

Fixes #1692.

R=devon.odell, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5538052
This commit is contained in:
Mikio Hara 2012-01-15 14:19:44 +09:00
parent 2374edc640
commit 7419921bf3
6 changed files with 104 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

27
src/pkg/net/sockopt_linux.go
View file

@ -10,16 +10,27 @@ import (
"syscall"
)
func setKernelSpecificSockopt(s, f int) {
// Allow reuse of recently-used addresses.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
func setDefaultSockopts(s, f, p int) {
switch f {
case syscall.AF_INET6:
// Allow both IP versions even if the OS default is otherwise.
syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)
}
if f == syscall.AF_UNIX || p == syscall.IPPROTO_TCP {
// Allow reuse of recently-used addresses.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
}
// Allow broadcast.
syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)
if f == syscall.AF_INET6 {
// using ip, tcp, udp, etc.
// allow both protocols even if the OS default is otherwise.
syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)
}
}
func setDefaultMulticastSockopts(fd *netFD) {
fd.incref()
defer fd.decref()
// Allow multicast UDP and raw IP datagram sockets to listen
// concurrently across multiple listeners.
syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
}