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slirp: Rework internal configuration

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The user mode IP stack is currently only minimally configurable /wrt to
its virtual IP addresses. This is unfortunate if some guest has a fixed
idea of which IP addresses to use.

Therefore this patch prepares the stack for fully configurable IP
addresses and masks. The user interface and default addresses remain
untouched in this step, they will be enhanced in the following patch.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-06-24 14:42:28 +02:00 • committed by Anthony Liguori
parent ad196a9d0c
commit a13a4126c8
13 changed files with 148 additions and 141 deletions
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17
slirp/tcp_subr.c
View file

@ -384,16 +384,12 @@ int tcp_fconnect(struct socket *so)
setsockopt(s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(opt ));
addr.sin_family = AF_INET;
if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr) {
if ((so->so_faddr.s_addr & vnetwork_mask.s_addr) == vnetwork_addr.s_addr) {
/* It's an alias */
switch(ntohl(so->so_faddr.s_addr) & 0xff) {
case CTL_DNS:
if (so->so_faddr.s_addr == vnameserver_addr.s_addr) {
addr.sin_addr = dns_addr;
break;
case CTL_ALIAS:
default:
} else {
addr.sin_addr = loopback_addr;
break;
}
} else
addr.sin_addr = so->so_faddr;
@ -478,7 +474,7 @@ tcp_connect(struct socket *inso)
so->so_faddr = addr.sin_addr;
/* Translate connections from localhost to the real hostname */
if (so->so_faddr.s_addr == 0 || so->so_faddr.s_addr == loopback_addr.s_addr)
so->so_faddr = alias_addr;
so->so_faddr = vhost_addr;
/* Close the accept() socket, set right state */
if (inso->so_state & SS_FACCEPTONCE) {
@ -1230,7 +1226,6 @@ do_prompt:
*/
int tcp_ctl(struct socket *so)
{
int command = (ntohl(so->so_faddr.s_addr) & 0xff);
struct sbuf *sb = &so->so_snd;
struct ex_list *ex_ptr;
int do_pty;
@ -1238,11 +1233,11 @@ int tcp_ctl(struct socket *so)
DEBUG_CALL("tcp_ctl");
DEBUG_ARG("so = %lx", (long )so);
if (command != CTL_ALIAS) {
if (so->so_faddr.s_addr != vhost_addr.s_addr) {
/* Check if it's pty_exec */
for (ex_ptr = exec_list; ex_ptr; ex_ptr = ex_ptr->ex_next) {
if (ex_ptr->ex_fport == so->so_fport &&
command == ex_ptr->ex_addr) {
so->so_faddr.s_addr == ex_ptr->ex_addr.s_addr) {
if (ex_ptr->ex_pty == 3) {
so->s = -1;
so->extra = (void *)ex_ptr->ex_exec;