*/
#ifndef lint
-static char rcsid[] = "$Id: ipcp.c,v 1.22 1995/12/18 03:45:56 paulus Exp $";
+static char rcsid[] = "$Id: ipcp.c,v 1.23 1996/01/01 22:56:53 paulus Exp $";
#endif
/*
#include <stdio.h>
#include <string.h>
#include <syslog.h>
+#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
ipcp_options ipcp_hisoptions[NUM_PPP]; /* Options that we ack'd */
/* local vars */
-static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
+static int cis_received[NUM_PPP]; /* # Conf-Reqs received */
+static int default_route_set[NUM_PPP]; /* Have set up a default route */
+static int proxy_arp_set[NUM_PPP]; /* Have created proxy arp entry */
/*
* Callbacks for fsm code. (CI = Configuration Information)
static void ipcp_up __P((fsm *)); /* We're UP */
static void ipcp_down __P((fsm *)); /* We're DOWN */
static void ipcp_script __P((fsm *, char *)); /* Run an up/down script */
+static void ipcp_finished __P((fsm *)); /* Don't need lower layer */
fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
ipcp_up, /* Called when fsm reaches OPENED state */
ipcp_down, /* Called when fsm leaves OPENED state */
NULL, /* Called when we want the lower layer up */
- NULL, /* Called when we want the lower layer down */
+ ipcp_finished, /* Called when we want the lower layer down */
NULL, /* Called when Protocol-Reject received */
NULL, /* Retransmission is necessary */
NULL, /* Called to handle protocol-specific codes */
struct protent ipcp_protent = {
PPP_IPCP, ipcp_init, ipcp_input, ipcp_protrej,
ipcp_lowerup, ipcp_lowerdown, ipcp_open, ipcp_close,
- ipcp_printpkt, NULL, 1, "IPCP"
+ ipcp_printpkt, NULL, 1, "IPCP",
+ ip_check_options, ip_demand_conf,
};
/*
}
+/*
+ * ip_check_options - check that any IP-related options are OK,
+ * and assign appropriate defaults.
+ */
+void
+ip_check_options()
+{
+ struct hostent *hp;
+ u_int32_t local;
+ ipcp_options *wo = &ipcp_wantoptions[0];
+
+ /*
+ * Default our local IP address based on our hostname.
+ * If local IP address already given, don't bother.
+ */
+ if (wo->ouraddr == 0 && !disable_defaultip) {
+ /*
+ * Look up our hostname (possibly with domain name appended)
+ * and take the first IP address as our local IP address.
+ * If there isn't an IP address for our hostname, too bad.
+ */
+ wo->accept_local = 1; /* don't insist on this default value */
+ if ((hp = gethostbyname(hostname)) != NULL) {
+ local = *(u_int32_t *)hp->h_addr;
+ if (local != 0 && !bad_ip_adrs(local))
+ wo->ouraddr = local;
+ }
+ }
+
+ if (demand && wo->hisaddr == 0) {
+ fprintf(stderr,
+ "Remote IP address must be specified for demand-dialling\n");
+ exit(1);
+ }
+}
+
+
+/*
+ * ip_demand_conf - configure the interface as though
+ * IPCP were up, for use with dial-on-demand.
+ */
+int
+ip_demand_conf(u)
+ int u;
+{
+ ipcp_options *wo = &ipcp_wantoptions[u];
+
+ if (!sifaddr(u, wo->ouraddr, wo->hisaddr, GetMask(wo->ouraddr)))
+ return 0;
+ if (!sifnpmode(u, PPP_IP, NPMODE_QUEUE))
+ return 0;
+ if (!sifup(u))
+ return 0;
+ if (wo->default_route)
+ if (sifdefaultroute(u, wo->hisaddr))
+ default_route_set[u] = 1;
+ if (wo->proxy_arp)
+ if (sifproxyarp(u, wo->hisaddr))
+ proxy_arp_set[u] = 1;
+
+ syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(wo->ouraddr));
+ syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(wo->hisaddr));
+
+ return 1;
+}
+
+
/*
* ipcp_up - IPCP has come UP.
*
u_int32_t mask;
ipcp_options *ho = &ipcp_hisoptions[f->unit];
ipcp_options *go = &ipcp_gotoptions[f->unit];
+ ipcp_options *wo = &ipcp_wantoptions[f->unit];
+ np_up(f->unit, PPP_IP);
IPCPDEBUG((LOG_INFO, "ipcp: up"));
- go->default_route = 0;
- go->proxy_arp = 0;
/*
* We must have a non-zero IP address for both ends of the link.
*/
if (!ho->neg_addr)
- ho->hisaddr = ipcp_wantoptions[f->unit].hisaddr;
+ ho->hisaddr = wo->hisaddr;
if (ho->hisaddr == 0) {
syslog(LOG_ERR, "Could not determine remote IP address");
return;
}
- syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
- syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
+ /* set tcp compression */
+ sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
/*
- * Set IP addresses and (if specified) netmask.
+ * If we are doing dial-on-demand, the interface is already
+ * configured, so we put out any saved-up packets, then set the
+ * interface to pass IP packets.
*/
- mask = GetMask(go->ouraddr);
- if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
- IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
- ipcp_close(f->unit, "Interface configuration failed");
- return;
- }
+ if (demand) {
+ if (go->ouraddr != wo->ouraddr || ho->hisaddr != wo->hisaddr) {
+ syslog(LOG_ERR, "Failed to negotiate desired IP addresses");
+ ipcp_close(f->unit, "Wrong IP addresses");
+ return;
+ }
+ demand_rexmit(PPP_IP);
+ sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
+
+ } else {
+
+ /*
+ * Set IP addresses and (if specified) netmask.
+ */
+ mask = GetMask(go->ouraddr);
+ if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask)) {
+ IPCPDEBUG((LOG_WARNING, "sifaddr failed"));
+ ipcp_close(f->unit, "Interface configuration failed");
+ return;
+ }
- /* set tcp compression */
- sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
+ /* bring the interface up for IP */
+ if (!sifup(f->unit)) {
+ IPCPDEBUG((LOG_WARNING, "sifup failed"));
+ ipcp_close(f->unit, "Interface configuration failed");
+ return;
+ }
- /* bring the interface up for IP */
- if (!sifup(f->unit)) {
- IPCPDEBUG((LOG_WARNING, "sifup failed"));
- ipcp_close(f->unit, "Interface configuration failed");
- return;
- }
+ /* assign a default route through the interface if required */
+ if (ipcp_wantoptions[f->unit].default_route)
+ if (sifdefaultroute(f->unit, ho->hisaddr))
+ default_route_set[f->unit] = 1;
- /* assign a default route through the interface if required */
- if (ipcp_wantoptions[f->unit].default_route)
- if (sifdefaultroute(f->unit, ho->hisaddr))
- go->default_route = 1;
+ /* Make a proxy ARP entry if requested. */
+ if (ipcp_wantoptions[f->unit].proxy_arp)
+ if (sifproxyarp(f->unit, ho->hisaddr))
+ proxy_arp_set[f->unit] = 1;
- /* Make a proxy ARP entry if requested. */
- if (ipcp_wantoptions[f->unit].proxy_arp)
- if (sifproxyarp(f->unit, ho->hisaddr))
- go->proxy_arp = 1;
+ syslog(LOG_NOTICE, "local IP address %s", ip_ntoa(go->ouraddr));
+ syslog(LOG_NOTICE, "remote IP address %s", ip_ntoa(ho->hisaddr));
+ }
/*
* Execute the ip-up script, like this:
{
u_int32_t ouraddr, hisaddr;
+ np_down(f->unit, PPP_IP);
IPCPDEBUG((LOG_INFO, "ipcp: down"));
- ouraddr = ipcp_gotoptions[f->unit].ouraddr;
- hisaddr = ipcp_hisoptions[f->unit].hisaddr;
- if (ipcp_gotoptions[f->unit].proxy_arp)
- cifproxyarp(f->unit, hisaddr);
- if (ipcp_gotoptions[f->unit].default_route)
- cifdefaultroute(f->unit, hisaddr);
- sifdown(f->unit);
- cifaddr(f->unit, ouraddr, hisaddr);
+ /*
+ * If we are doing dial-on-demand, set the interface
+ * to queue up outgoing packets (for now).
+ */
+ if (demand) {
+ sifnpmode(f->unit, PPP_IP, NPMODE_QUEUE);
+
+ } else {
+ ouraddr = ipcp_gotoptions[f->unit].ouraddr;
+ hisaddr = ipcp_hisoptions[f->unit].hisaddr;
+ if (proxy_arp_set[f->unit]) {
+ cifproxyarp(f->unit, hisaddr);
+ proxy_arp_set[f->unit] = 0;
+ }
+ if (default_route_set[f->unit]) {
+ cifdefaultroute(f->unit, hisaddr);
+ default_route_set[f->unit] = 0;
+ }
+ sifdown(f->unit);
+ cifaddr(f->unit, ouraddr, hisaddr);
+ }
/* Execute the ip-down script */
ipcp_script(f, _PATH_IPDOWN);
}
+/*
+ * ipcp_finished - possibly shut down the lower layers.
+ */
+static void
+ipcp_finished(f)
+ fsm *f;
+{
+ np_finished(f->unit, PPP_IP);
+}
+
+
/*
* ipcp_script - Execute a script with arguments
* interface-name tty-name speed local-IP remote-IP.
projects / ppp.git / commitdiff