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socket: avoid unnecessary bind() call

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Don't call bind() if the specified local address of a socket has port 0
and the "any" address. It will be bound automatically on connect() or
sendmsg().
This commit is contained in:
Miroslav Lichvar
2019-07-24 11:46:39 +02:00
parent 27fd751915
commit 45e41b7ac1
1 changed files with 14 additions and 1 deletions
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15
socket.c
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@@ -258,6 +258,18 @@ set_ip_options(int sock_fd, int family, int flags)
/* ================================================== */ /* ================================================== */
static int
is_any_address(IPAddr *addr)
{
IPAddr any_addr;
SCK_GetAnyLocalIPAddress(addr->family, &any_addr);
return UTI_CompareIPs(&any_addr, addr, NULL) == 0;
}
/* ================================================== */
static int static int
bind_ip_address(int sock_fd, IPSockAddr *addr, int flags) bind_ip_address(int sock_fd, IPSockAddr *addr, int flags)
{ {
@@ -352,8 +364,9 @@ open_ip_socket(IPSockAddr *remote_addr, IPSockAddr *local_addr, int type, int fl
if (!set_ip_options(sock_fd, family, flags)) if (!set_ip_options(sock_fd, family, flags))
goto error; goto error;
/* Bind the socket if a local address was specified */ /* Bind the socket if a non-any local address/port was specified */
if (local_addr && local_addr->ip_addr.family != IPADDR_UNSPEC && if (local_addr && local_addr->ip_addr.family != IPADDR_UNSPEC &&
(local_addr->port != 0 || !is_any_address(&local_addr->ip_addr)) &&
!bind_ip_address(sock_fd, local_addr, flags)) !bind_ip_address(sock_fd, local_addr, flags))
goto error; goto error;