/*
* Make a new bundle or join us to an existing bundle
* if we are doing multilink.
*/
int
mp_join_bundle()
{
lcp_options *go = &lcp_gotoptions[0];
lcp_options *ho = &lcp_hisoptions[0];
lcp_options *ao = &lcp_allowoptions[0];
int unit, pppd_pid;
int l, mtu;
char *p;
TDB_DATA key, pid, rec;
if (doing_multilink) {
/* have previously joined a bundle */
if (!go->neg_mrru || !ho->neg_mrru) {
notice("oops, didn't get multilink on renegotiation");
lcp_close(pcb, "multilink required");
return 0;
}
/* XXX should check the peer_authname and ho->endpoint
are the same as previously */
return 0;
}
if (!go->neg_mrru || !ho->neg_mrru) {
/* not doing multilink */
if (go->neg_mrru)
notice("oops, multilink negotiated only for receive");
mtu = ho->neg_mru? ho->mru: PPP_MRU;
if (mtu > ao->mru)
mtu = ao->mru;
if (demand) {
/* already have a bundle */
cfg_bundle(0, 0, 0, 0);
netif_set_mtu(pcb, mtu);
return 0;
}
make_new_bundle(0, 0, 0, 0);
set_ifunit(1);
netif_set_mtu(pcb, mtu);
return 0;
}
doing_multilink = 1;
/*
* Find the appropriate bundle or join a new one.
* First we make up a name for the bundle.
* The length estimate is worst-case assuming every
* character has to be quoted.
*/
l = 4 * strlen(peer_authname) + 10;
if (ho->neg_endpoint)
l += 3 * ho->endpoint.length + 8;
if (bundle_name)
l += 3 * strlen(bundle_name) + 2;
bundle_id = malloc(l);
if (bundle_id == 0)
novm("bundle identifier");
p = bundle_id;
p += slprintf(p, l-1, "BUNDLE=\"%q\"", peer_authname);
if (ho->neg_endpoint || bundle_name)
*p++ = '/';
if (ho->neg_endpoint)
p += slprintf(p, bundle_id+l-p, "%s",
epdisc_to_str(&ho->endpoint));
if (bundle_name)
p += slprintf(p, bundle_id+l-p, "/%v", bundle_name);
/* Make the key for the list of links belonging to the bundle */
l = p - bundle_id;
blinks_id = malloc(l + 7);
if (blinks_id == NULL)
novm("bundle links key");
slprintf(blinks_id, l + 7, "BUNDLE_LINKS=%s", bundle_id + 7);
/*
* For demand mode, we only need to configure the bundle
* and attach the link.
*/
mtu = LWIP_MIN(ho->mrru, ao->mru);
if (demand) {
cfg_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
netif_set_mtu(pcb, mtu);
script_setenv("BUNDLE", bundle_id + 7, 1);
return 0;
}
/*
* Check if the bundle ID is already in the database.
*/
unit = -1;
lock_db();
key.dptr = bundle_id;
key.dsize = p - bundle_id;
pid = tdb_fetch(pppdb, key);
if (pid.dptr != NULL) {
/* bundle ID exists, see if the pppd record exists */
rec = tdb_fetch(pppdb, pid);
if (rec.dptr != NULL && rec.dsize > 0) {
/* make sure the string is null-terminated */
rec.dptr[rec.dsize-1] = 0;
/* parse the interface number */
parse_num(rec.dptr, "IFNAME=ppp", &unit);
/* check the pid value */
if (!parse_num(rec.dptr, "PPPD_PID=", &pppd_pid)
|| !process_exists(pppd_pid)
|| !owns_unit(pid, unit))
unit = -1;
free(rec.dptr);
}
free(pid.dptr);
}
if (unit >= 0) {
/* attach to existing unit */
if (bundle_attach(unit)) {
set_ifunit(0);
script_setenv("BUNDLE", bundle_id + 7, 0);
make_bundle_links(1);
unlock_db();
info("Link attached to %s", ifname);
return 1;
}
/* attach failed because bundle doesn't exist */
}
/* we have to make a new bundle */
make_new_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
set_ifunit(1);
netif_set_mtu(pcb, mtu);
script_setenv("BUNDLE", bundle_id + 7, 1);
make_bundle_links(pcb);
unlock_db();
info("New bundle %s created", ifname);
multilink_master = 1;
return 0;
}
/*
* Make a new bundle or join us to an existing bundle
* if we are doing multilink.
*/
int
mp_join_bundle()
{
lcp_options *go = &lcp_gotoptions[0];
lcp_options *ho = &lcp_hisoptions[0];
int unit, pppd_pid;
int l;
char *p;
TDB_DATA key, pid, rec;
if (!go->neg_mrru || !ho->neg_mrru) {
/* not doing multilink */
if (go->neg_mrru)
notice("oops, multilink negotiated only for receive");
multilink = 0;
if (demand) {
/* already have a bundle */
cfg_bundle(0, 0, 0, 0);
return 0;
}
make_new_bundle(0, 0, 0, 0);
set_ifunit(1);
return 0;
}
/*
* Find the appropriate bundle or join a new one.
* First we make up a name for the bundle.
* The length estimate is worst-case assuming every
* character has to be quoted.
*
* Note - RFC 1990 requires that an unnegotiated endpoint
* discriminator value be equivalent to negotiating with class
* zero. Do not test ho->neg_endpoint here.
*/
l = 4 * strlen(peer_authname) + 10;
l += 3 * ho->endpoint.length + 8;
if (bundle_name)
l += 3 * strlen(bundle_name) + 2;
bundle_id = malloc(l);
if (bundle_id == NULL)
novm("bundle identifier");
p = bundle_id;
p += slprintf(p, l-1, "BUNDLE=\"%q\"", peer_authname);
*p++ = '/';
p += slprintf(p, bundle_id+l-p, "%s", epdisc_to_str(&ho->endpoint));
if (bundle_name)
p += slprintf(p, bundle_id+l-p, "/%v", bundle_name);
dbglog("bundle_id = %s", bundle_id+7);
/*
* For demand mode, we only need to configure the bundle
* and attach the link.
*/
if (demand) {
cfg_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
script_setenv("BUNDLE", bundle_id + 7, 1);
return 0;
}
/*
* Check if the bundle ID is already in the database.
*/
unit = -1;
tdb_writelock(pppdb);
key.dptr = bundle_id;
key.dsize = p - bundle_id;
pid = tdb_fetch(pppdb, key);
if (pid.dptr != NULL) {
/* bundle ID exists, see if the pppd record exists */
rec = tdb_fetch(pppdb, pid);
if (rec.dptr != NULL) {
/* it does, parse the interface number */
parse_num(rec.dptr, "IFNAME=ppp", &unit);
/* check the pid value */
if (!parse_num(rec.dptr, "PPPD_PID=", &pppd_pid)
|| !process_exists(pppd_pid)
|| !owns_unit(pid, unit))
unit = -1;
free(rec.dptr);
}
free(pid.dptr);
}
if (unit >= 0) {
/* attach to existing unit */
if (bundle_attach(unit)) {
set_ifunit(0);
script_setenv("BUNDLE", bundle_id + 7, 0);
tdb_writeunlock(pppdb);
info("Link attached to %s", ifname);
return 1;
}
/* attach failed because bundle doesn't exist */
}
/* we have to make a new bundle */
make_new_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
set_ifunit(1);
script_setenv("BUNDLE", bundle_id + 7, 1);
tdb_writeunlock(pppdb);
info("New bundle %s created", ifname);
return 0;
}