* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#define RCSID "$Id: ipcp.c,v 1.69 2004/11/13 12:03:26 paulus Exp $"
+#define RCSID "$Id: ipcp.c,v 1.73 2008/05/26 08:33:22 paulus Exp $"
/*
* TODO:
u_int32_t netmask = 0; /* IP netmask to set on interface */
bool disable_defaultip = 0; /* Don't use hostname for default IP adrs */
+bool noremoteip = 0; /* Let him have no IP address */
/* Hook for a plugin to know when IP protocol has come up */
void (*ip_up_hook) __P((void)) = NULL;
{ "ipcp-no-address", o_bool, &ipcp_wantoptions[0].neg_addr,
"Disable IP-Address usage", OPT_A2CLR,
&ipcp_allowoptions[0].neg_addr },
+#ifdef __linux__
+ { "noremoteip", o_bool, &noremoteip,
+ "Allow peer to have no IP address", 1 },
+#endif
+ { "nosendip", o_bool, &ipcp_wantoptions[0].neg_addr,
+ "Don't send our IP address to peer", OPT_A2CLR,
+ &ipcp_wantoptions[0].old_addrs},
{ "IP addresses", o_wild, (void *) &setipaddr,
"set local and remote IP addresses",
};
static void ipcp_clear_addrs __P((int, u_int32_t, u_int32_t));
-static void ipcp_script __P((char *)); /* Run an up/down script */
+static void ipcp_script __P((char *, int)); /* Run an up/down script */
static void ipcp_script_done __P((void *));
/*
* on an option that we didn't include in our request packet.
* If they want to negotiate about IP addresses, we comply.
* If they want us to ask for compression, we refuse.
+ * If they want us to ask for ms-dns, we do that, since some
+ * peers get huffy if we don't.
*/
while (len >= CILEN_VOID) {
GETCHAR(citype, p);
try.neg_addr = 1;
no.neg_addr = 1;
break;
+ case CI_MS_DNS1:
+ if (go->req_dns1 || no.req_dns1 || cilen != CILEN_ADDR)
+ goto bad;
+ GETLONG(l, p);
+ try.dnsaddr[0] = htonl(l);
+ try.req_dns1 = 1;
+ no.req_dns1 = 1;
+ break;
+ case CI_MS_DNS2:
+ if (go->req_dns2 || no.req_dns2 || cilen != CILEN_ADDR)
+ goto bad;
+ GETLONG(l, p);
+ try.dnsaddr[1] = htonl(l);
+ try.req_dns2 = 1;
+ no.req_dns2 = 1;
+ break;
}
p = next;
}
* option safely.
*/
if (rc != CONFREJ && !ho->neg_addr && !ho->old_addrs &&
- wo->req_addr && !reject_if_disagree) {
+ wo->req_addr && !reject_if_disagree && !noremoteip) {
if (rc == CONFACK) {
rc = CONFNAK;
ucp = inp; /* reset pointer */
{
ipcp_options *wo = &ipcp_wantoptions[u];
- if (wo->hisaddr == 0) {
+ if (wo->hisaddr == 0 && !noremoteip) {
/* make up an arbitrary address for the peer */
wo->hisaddr = htonl(0x0a707070 + ifunit);
wo->accept_remote = 1;
}
if (!sifaddr(u, wo->ouraddr, wo->hisaddr, GetMask(wo->ouraddr)))
return 0;
+ ipcp_script(_PATH_IPPREUP, 1);
if (!sifup(u))
return 0;
if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
proxy_arp_set[u] = 1;
notice("local IP address %I", wo->ouraddr);
- notice("remote IP address %I", wo->hisaddr);
+ if (wo->hisaddr)
+ notice("remote IP address %I", wo->hisaddr);
return 1;
}
ipcp_close(f->unit, "Could not determine local IP address");
return;
}
- if (ho->hisaddr == 0) {
+ if (ho->hisaddr == 0 && !noremoteip) {
ho->hisaddr = htonl(0x0a404040 + ifunit);
warn("Could not determine remote IP address: defaulting to %I",
ho->hisaddr);
}
script_setenv("IPLOCAL", ip_ntoa(go->ouraddr), 0);
- script_setenv("IPREMOTE", ip_ntoa(ho->hisaddr), 1);
+ if (ho->hisaddr != 0)
+ script_setenv("IPREMOTE", ip_ntoa(ho->hisaddr), 1);
+ if (!go->req_dns1)
+ go->dnsaddr[0] = 0;
+ if (!go->req_dns2)
+ go->dnsaddr[1] = 0;
if (go->dnsaddr[0])
script_setenv("DNS1", ip_ntoa(go->dnsaddr[0]), 0);
if (go->dnsaddr[1])
/*
* Check that the peer is allowed to use the IP address it wants.
*/
- if (!auth_ip_addr(f->unit, ho->hisaddr)) {
+ if (ho->hisaddr != 0 && !auth_ip_addr(f->unit, ho->hisaddr)) {
error("Peer is not authorized to use remote address %I", ho->hisaddr);
ipcp_close(f->unit, "Unauthorized remote IP address");
return;
wo->ouraddr = go->ouraddr;
} else
script_unsetenv("OLDIPLOCAL");
- if (ho->hisaddr != wo->hisaddr) {
+ if (ho->hisaddr != wo->hisaddr && wo->hisaddr != 0) {
warn("Remote IP address changed to %I", ho->hisaddr);
script_setenv("OLDIPREMOTE", ip_ntoa(wo->hisaddr), 0);
wo->hisaddr = ho->hisaddr;
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
- if (ipcp_wantoptions[f->unit].proxy_arp)
+ if (ho->hisaddr != 0 && ipcp_wantoptions[f->unit].proxy_arp)
if (sifproxyarp(f->unit, ho->hisaddr))
proxy_arp_set[f->unit] = 1;
}
#endif
+ /* run the pre-up script, if any, and wait for it to finish */
+ ipcp_script(_PATH_IPPREUP, 1);
+
/* bring the interface up for IP */
if (!sifup(f->unit)) {
if (debug)
default_route_set[f->unit] = 1;
/* Make a proxy ARP entry if requested. */
- if (ipcp_wantoptions[f->unit].proxy_arp)
+ if (ho->hisaddr != 0 && ipcp_wantoptions[f->unit].proxy_arp)
if (sifproxyarp(f->unit, ho->hisaddr))
proxy_arp_set[f->unit] = 1;
ipcp_wantoptions[0].ouraddr = go->ouraddr;
notice("local IP address %I", go->ouraddr);
- notice("remote IP address %I", ho->hisaddr);
+ if (ho->hisaddr != 0)
+ notice("remote IP address %I", ho->hisaddr);
if (go->dnsaddr[0])
notice("primary DNS address %I", go->dnsaddr[0]);
if (go->dnsaddr[1])
*/
if (ipcp_script_state == s_down && ipcp_script_pid == 0) {
ipcp_script_state = s_up;
- ipcp_script(_PATH_IPUP);
+ ipcp_script(_PATH_IPUP, 0);
}
}
/* Execute the ip-down script */
if (ipcp_script_state == s_up && ipcp_script_pid == 0) {
ipcp_script_state = s_down;
- ipcp_script(_PATH_IPDOWN);
+ ipcp_script(_PATH_IPDOWN, 0);
}
}
case s_up:
if (ipcp_fsm[0].state != OPENED) {
ipcp_script_state = s_down;
- ipcp_script(_PATH_IPDOWN);
+ ipcp_script(_PATH_IPDOWN, 0);
}
break;
case s_down:
if (ipcp_fsm[0].state == OPENED) {
ipcp_script_state = s_up;
- ipcp_script(_PATH_IPUP);
+ ipcp_script(_PATH_IPUP, 0);
}
break;
}
* interface-name tty-name speed local-IP remote-IP.
*/
static void
-ipcp_script(script)
+ipcp_script(script, wait)
char *script;
+ int wait;
{
char strspeed[32], strlocal[32], strremote[32];
char *argv[8];
argv[5] = strremote;
argv[6] = ipparam;
argv[7] = NULL;
- ipcp_script_pid = run_program(script, argv, 0, ipcp_script_done, NULL);
+ if (wait)
+ run_program(script, argv, 0, NULL, NULL, 1);
+ else
+ ipcp_script_pid = run_program(script, argv, 0, ipcp_script_done,
+ NULL, 0);
}
/*
case CI_MS_DNS2:
p += 2;
GETLONG(cilong, p);
- printer(arg, "ms-dns%d %I", code - CI_MS_DNS1 + 1,
+ printer(arg, "ms-dns%d %I", (code == CI_MS_DNS1? 1: 2),
htonl(cilong));
break;
case CI_MS_WINS1: