1999-10-26 11:04:25 +00:00
|
|
|
#define SIGNOFF "session closed"
|
1999-10-21 09:06:11 +00:00
|
|
|
/*
|
|
|
|
* ng_pppoe.c
|
|
|
|
*
|
|
|
|
* Copyright (c) 1996-1999 Whistle Communications, Inc.
|
|
|
|
* All rights reserved.
|
|
|
|
*
|
|
|
|
* Subject to the following obligations and disclaimer of warranty, use and
|
|
|
|
* redistribution of this software, in source or object code forms, with or
|
|
|
|
* without modifications are expressly permitted by Whistle Communications;
|
|
|
|
* provided, however, that:
|
|
|
|
* 1. Any and all reproductions of the source or object code must include the
|
|
|
|
* copyright notice above and the following disclaimer of warranties; and
|
|
|
|
* 2. No rights are granted, in any manner or form, to use Whistle
|
|
|
|
* Communications, Inc. trademarks, including the mark "WHISTLE
|
|
|
|
* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
|
|
|
|
* such appears in the above copyright notice or in the software.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
|
|
|
|
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
|
|
|
|
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
|
|
|
|
* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
|
|
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
|
|
|
|
* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
|
|
|
|
* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
|
|
|
|
* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
|
|
|
|
* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
|
|
|
|
* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
|
|
|
|
* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
|
|
|
* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
|
|
* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
|
|
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
|
|
* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
|
|
|
|
* OF SUCH DAMAGE.
|
|
|
|
*
|
|
|
|
* Author: Julian Elischer <julian@whistle.com>
|
|
|
|
*
|
|
|
|
* $FreeBSD$
|
1999-11-01 10:00:40 +00:00
|
|
|
* $Whistle: ng_pppoe.c,v 1.10 1999/11/01 09:24:52 julian Exp $
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
1999-10-23 15:15:42 +00:00
|
|
|
#if 0
|
|
|
|
#define AAA printf("pppoe: %s\n", __FUNCTION__ );
|
1999-10-26 08:08:48 +00:00
|
|
|
#define BBB printf("-%d-", __LINE__ );
|
1999-10-23 15:15:42 +00:00
|
|
|
#else
|
|
|
|
#define AAA
|
1999-10-26 08:08:48 +00:00
|
|
|
#define BBB
|
1999-10-23 15:15:42 +00:00
|
|
|
#endif
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/systm.h>
|
|
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/mbuf.h>
|
|
|
|
#include <sys/malloc.h>
|
|
|
|
#include <sys/errno.h>
|
|
|
|
#include <sys/syslog.h>
|
|
|
|
#include <net/ethernet.h>
|
|
|
|
|
|
|
|
#include <netgraph/ng_message.h>
|
|
|
|
#include <netgraph/netgraph.h>
|
|
|
|
#include <netgraph/ng_pppoe.h>
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This section contains the netgraph method declarations for the
|
|
|
|
* sample node. These methods define the netgraph 'type'.
|
|
|
|
*/
|
|
|
|
|
1999-11-01 10:00:40 +00:00
|
|
|
static ng_constructor_t ng_pppoe_constructor;
|
|
|
|
static ng_rcvmsg_t ng_pppoe_rcvmsg;
|
|
|
|
static ng_shutdown_t ng_pppoe_rmnode;
|
|
|
|
static ng_newhook_t ng_pppoe_newhook;
|
|
|
|
static ng_connect_t ng_pppoe_connect;
|
|
|
|
static ng_rcvdata_t ng_pppoe_rcvdata;
|
|
|
|
static ng_disconnect_t ng_pppoe_disconnect;
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
/* Netgraph node type descriptor */
|
|
|
|
static struct ng_type typestruct = {
|
|
|
|
NG_VERSION,
|
|
|
|
NG_PPPOE_NODE_TYPE,
|
|
|
|
NULL,
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_constructor,
|
|
|
|
ng_pppoe_rcvmsg,
|
|
|
|
ng_pppoe_rmnode,
|
|
|
|
ng_pppoe_newhook,
|
1999-10-21 09:06:11 +00:00
|
|
|
NULL,
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_connect,
|
|
|
|
ng_pppoe_rcvdata,
|
|
|
|
ng_pppoe_rcvdata,
|
|
|
|
ng_pppoe_disconnect
|
1999-10-21 09:06:11 +00:00
|
|
|
};
|
1999-10-27 11:29:51 +00:00
|
|
|
NETGRAPH_INIT(pppoe, &typestruct);
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* States for the session state machine.
|
|
|
|
* These have no meaning if there is no hook attached yet.
|
|
|
|
*/
|
|
|
|
enum state {
|
|
|
|
PPPOE_SNONE=0, /* [both] Initial state */
|
|
|
|
PPPOE_SINIT, /* [Client] Sent discovery initiation */
|
1999-11-14 10:21:26 +00:00
|
|
|
PPPOE_PRIMED, /* [Server] Received discovery initiation */
|
1999-10-21 09:06:11 +00:00
|
|
|
PPPOE_SOFFER, /* [Server] Sent offer message */
|
|
|
|
PPPOE_SREQ, /* [Client] Sent a Request */
|
|
|
|
PPPOE_LISTENING, /* [Server] Listening for discover initiation msg */
|
|
|
|
PPPOE_NEWCONNECTED, /* [Both] Connection established, No data received */
|
|
|
|
PPPOE_CONNECTED, /* [Both] Connection established, Data received */
|
|
|
|
PPPOE_DEAD /* [Both] */
|
|
|
|
};
|
|
|
|
|
|
|
|
#define NUMTAGS 20 /* number of tags we are set up to work with */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Information we store for each hook on each node for negotiating the
|
|
|
|
* session. The mbuf and cluster are freed once negotiation has completed.
|
|
|
|
* The whole negotiation block is then discarded.
|
|
|
|
*/
|
|
|
|
|
|
|
|
struct sess_neg {
|
|
|
|
struct mbuf *m; /* holds cluster with last sent packet */
|
|
|
|
union packet *pkt; /* points within the above cluster */
|
|
|
|
struct callout_handle timeout_handle; /* see timeout(9) */
|
|
|
|
u_int timeout; /* 0,1,2,4,8,16 etc. seconds */
|
|
|
|
u_int numtags;
|
|
|
|
struct pppoe_tag *tags[NUMTAGS];
|
|
|
|
u_int service_len;
|
|
|
|
u_int ac_name_len;
|
|
|
|
|
|
|
|
struct datatag service;
|
|
|
|
struct datatag ac_name;
|
|
|
|
};
|
|
|
|
typedef struct sess_neg *negp;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Session information that is needed after connection.
|
|
|
|
*/
|
|
|
|
struct session {
|
|
|
|
hook_p hook;
|
|
|
|
u_int16_t Session_ID;
|
|
|
|
struct session *hash_next; /* not yet uesed */
|
|
|
|
enum state state;
|
|
|
|
char creator[NG_NODELEN + 1]; /* who to notify */
|
|
|
|
struct pppoe_full_hdr pkt_hdr; /* used when connected */
|
|
|
|
negp neg; /* used when negotiating */
|
|
|
|
};
|
|
|
|
typedef struct session *sessp;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Information we store for each node
|
|
|
|
*/
|
|
|
|
struct PPPOE {
|
|
|
|
node_p node; /* back pointer to node */
|
|
|
|
hook_p ethernet_hook;
|
|
|
|
hook_p debug_hook;
|
|
|
|
u_int packets_in; /* packets in from ethernet */
|
|
|
|
u_int packets_out; /* packets out towards ethernet */
|
|
|
|
u_int32_t flags;
|
|
|
|
/*struct session *buckets[HASH_SIZE];*/ /* not yet used */
|
|
|
|
};
|
|
|
|
typedef struct PPPOE *priv_p;
|
|
|
|
|
|
|
|
const struct ether_header eh_prototype =
|
|
|
|
{{0xff,0xff,0xff,0xff,0xff,0xff},
|
|
|
|
{0x00,0x00,0x00,0x00,0x00,0x00},
|
|
|
|
ETHERTYPE_PPPOE_DISC};
|
|
|
|
|
|
|
|
union uniq {
|
|
|
|
char bytes[sizeof(void *)];
|
|
|
|
void * pointer;
|
|
|
|
};
|
|
|
|
|
|
|
|
#define LEAVE(x) do { error = x; goto quit; } while(0)
|
|
|
|
static void pppoe_start(sessp sp);
|
|
|
|
static void sendpacket(sessp sp);
|
|
|
|
static void pppoe_ticker(void *arg);
|
|
|
|
static struct pppoe_tag* scan_tags(sessp sp, struct pppoe_hdr* ph);
|
1999-10-23 04:28:11 +00:00
|
|
|
static int pppoe_send_event(sessp sp, enum cmd cmdid);
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
/*************************************************************************
|
|
|
|
* Some basic utilities from the Linux version with author's permission.*
|
|
|
|
* Author: Michal Ostrowski <mostrows@styx.uwaterloo.ca> *
|
|
|
|
************************************************************************/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Generate a new session id
|
1999-11-14 10:21:26 +00:00
|
|
|
* XXX find out the FreeBSD locking scheme.
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
|
|
|
static u_int16_t
|
|
|
|
get_new_sid(node_p node)
|
|
|
|
{
|
|
|
|
static int pppoe_sid = 10;
|
|
|
|
sessp sp;
|
|
|
|
hook_p hook;
|
|
|
|
u_int16_t val;
|
|
|
|
priv_p privp = node->private;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
restart:
|
|
|
|
val = pppoe_sid++;
|
|
|
|
/*
|
|
|
|
* Spec says 0xFFFF is reserved.
|
|
|
|
* Also don't use 0x0000
|
|
|
|
*/
|
|
|
|
if (val == 0xffff) {
|
|
|
|
pppoe_sid = 20;
|
|
|
|
goto restart;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check it isn't already in use */
|
|
|
|
LIST_FOREACH(hook, &node->hooks, hooks) {
|
|
|
|
/* don't check special hooks */
|
|
|
|
if ((hook->private == &privp->debug_hook)
|
|
|
|
|| (hook->private == &privp->ethernet_hook))
|
|
|
|
continue;
|
|
|
|
sp = hook->private;
|
|
|
|
if (sp->Session_ID == val)
|
|
|
|
goto restart;
|
|
|
|
}
|
|
|
|
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Return the location where the next tag can be put
|
|
|
|
*/
|
|
|
|
static __inline struct pppoe_tag*
|
|
|
|
next_tag(struct pppoe_hdr* ph)
|
|
|
|
{
|
|
|
|
return (struct pppoe_tag*)(((char*)&ph->tag[0]) + ntohs(ph->length));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Look for a tag of a specific type
|
|
|
|
* Don't trust any length the other end says.
|
|
|
|
* but assume we already sanity checked ph->length.
|
|
|
|
*/
|
|
|
|
static struct pppoe_tag*
|
|
|
|
get_tag(struct pppoe_hdr* ph, u_int16_t idx)
|
|
|
|
{
|
|
|
|
char *end = (char *)next_tag(ph);
|
|
|
|
char *ptn;
|
|
|
|
struct pppoe_tag *pt = &ph->tag[0];
|
|
|
|
/*
|
|
|
|
* Keep processing tags while a tag header will still fit.
|
|
|
|
*/
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
while((char*)(pt + 1) <= end) {
|
|
|
|
/*
|
|
|
|
* If the tag data would go past the end of the packet, abort.
|
|
|
|
*/
|
|
|
|
ptn = (((char *)(pt + 1)) + ntohs(pt->tag_len));
|
|
|
|
if(ptn > end)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if(pt->tag_type == idx)
|
|
|
|
return pt;
|
|
|
|
|
|
|
|
pt = (struct pppoe_tag*)ptn;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
* inlines to initialise or add tags to a session's tag list,
|
|
|
|
**************************************************************************/
|
|
|
|
/*
|
|
|
|
* Initialise the session's tag list
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
init_tags(sessp sp)
|
|
|
|
{
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
if(sp->neg == NULL) {
|
|
|
|
printf("pppoe: asked to init NULL neg pointer\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
sp->neg->numtags = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
insert_tag(sessp sp, struct pppoe_tag *tp)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
negp neg;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
if((neg = sp->neg) == NULL) {
|
|
|
|
printf("pppoe: asked to use NULL neg pointer\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if ((i = neg->numtags++) < NUMTAGS) {
|
|
|
|
neg->tags[i] = tp;
|
|
|
|
} else {
|
|
|
|
printf("pppoe: asked to add too many tags to packet\n");
|
1999-11-09 00:31:04 +00:00
|
|
|
neg->numtags--;
|
1999-10-21 09:06:11 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Make up a packet, using the tags filled out for the session.
|
|
|
|
*
|
|
|
|
* Assume that the actual pppoe header and ethernet header
|
|
|
|
* are filled out externally to this routine.
|
|
|
|
* Also assume that neg->wh points to the correct
|
|
|
|
* location at the front of the buffer space.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
make_packet(sessp sp) {
|
|
|
|
struct pppoe_full_hdr *wh = &sp->neg->pkt->pkt_header;
|
|
|
|
struct pppoe_tag **tag;
|
|
|
|
char *dp;
|
|
|
|
int count;
|
|
|
|
int tlen;
|
|
|
|
u_int16_t length = 0;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
|
|
|
if ((sp->neg == NULL) || (sp->neg->m == NULL)) {
|
1999-10-21 09:06:11 +00:00
|
|
|
printf("pppoe: make_packet called from wrong state\n");
|
|
|
|
}
|
|
|
|
dp = (char *)wh->ph.tag;
|
|
|
|
for (count = 0, tag = sp->neg->tags;
|
|
|
|
((count < sp->neg->numtags) && (count < NUMTAGS));
|
|
|
|
tag++, count++) {
|
|
|
|
tlen = ntohs((*tag)->tag_len) + sizeof(**tag);
|
|
|
|
if ((length + tlen) > (ETHER_MAX_LEN - 4 - sizeof(*wh))) {
|
|
|
|
printf("pppoe: tags too long\n");
|
|
|
|
sp->neg->numtags = count;
|
|
|
|
break; /* XXX chop off what's too long */
|
|
|
|
}
|
|
|
|
bcopy((char *)*tag, (char *)dp, tlen);
|
|
|
|
length += tlen;
|
|
|
|
dp += tlen;
|
|
|
|
}
|
|
|
|
wh->ph.length = htons(length);
|
|
|
|
sp->neg->m->m_len = length + sizeof(*wh);
|
|
|
|
sp->neg->m->m_pkthdr.len = length + sizeof(*wh);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
* Routine to match a service offered *
|
|
|
|
**************************************************************************/
|
|
|
|
/*
|
|
|
|
* Find a hook that has a service string that matches that
|
|
|
|
* we are seeking. for now use a simple string.
|
|
|
|
* In the future we may need something like regexp().
|
|
|
|
* for testing allow a null string to match 1st found and a null service
|
|
|
|
* to match all requests. Also make '*' do the same.
|
|
|
|
*/
|
|
|
|
static hook_p
|
|
|
|
pppoe_match_svc(node_p node, char *svc_name, int svc_len)
|
|
|
|
{
|
|
|
|
sessp sp = NULL;
|
|
|
|
negp neg = NULL;
|
|
|
|
priv_p privp = node->private;
|
|
|
|
hook_p hook;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
LIST_FOREACH(hook, &node->hooks, hooks) {
|
|
|
|
|
|
|
|
/* skip any hook that is debug or ethernet */
|
|
|
|
if ((hook->private == &privp->debug_hook)
|
|
|
|
|| (hook->private == &privp->ethernet_hook))
|
|
|
|
continue;
|
|
|
|
sp = hook->private;
|
|
|
|
|
|
|
|
/* Skip any sessions which are not in LISTEN mode. */
|
|
|
|
if ( sp->state != PPPOE_LISTENING)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
neg = sp->neg;
|
|
|
|
/* XXX check validity of this */
|
|
|
|
/* special case, NULL request. match 1st found. */
|
|
|
|
if (svc_len == 0)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* XXX check validity of this */
|
|
|
|
/* Special case for a blank or "*" service name (wildcard) */
|
|
|
|
if ((neg->service_len == 0)
|
|
|
|
|| ((neg->service_len == 1)
|
|
|
|
&& (neg->service.data[0] == '*'))) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If the lengths don't match, that aint it. */
|
|
|
|
if (neg->service_len != svc_len)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* An exact match? */
|
|
|
|
if (strncmp(svc_name, neg->service.data, svc_len) == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return (hook);
|
|
|
|
}
|
|
|
|
/**************************************************************************
|
|
|
|
* Routine to find a particular session that matches an incoming packet *
|
|
|
|
**************************************************************************/
|
|
|
|
static hook_p
|
|
|
|
pppoe_findsession(node_p node, struct pppoe_full_hdr *wh)
|
|
|
|
{
|
|
|
|
sessp sp = NULL;
|
|
|
|
hook_p hook = NULL;
|
|
|
|
priv_p privp = node->private;
|
1999-10-23 22:46:38 +00:00
|
|
|
u_int16_t session = ntohs(wh->ph.sid);
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* find matching peer/session combination.
|
|
|
|
*/
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
LIST_FOREACH(hook, &node->hooks, hooks) {
|
|
|
|
/* don't check special hooks */
|
|
|
|
if ((hook->private == &privp->debug_hook)
|
|
|
|
|| (hook->private == &privp->ethernet_hook)) {
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
sp = hook->private;
|
|
|
|
if ( ( (sp->state == PPPOE_CONNECTED)
|
|
|
|
|| (sp->state == PPPOE_NEWCONNECTED) )
|
|
|
|
&& (sp->Session_ID == session)
|
|
|
|
&& (bcmp(sp->pkt_hdr.eh.ether_dhost,
|
|
|
|
wh->eh.ether_shost,
|
|
|
|
ETHER_ADDR_LEN)) == 0) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return (hook);
|
|
|
|
}
|
|
|
|
|
|
|
|
static hook_p
|
|
|
|
pppoe_finduniq(node_p node, struct pppoe_tag *tag)
|
|
|
|
{
|
|
|
|
hook_p hook = NULL;
|
|
|
|
priv_p privp = node->private;
|
|
|
|
union uniq uniq;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
bcopy(tag->tag_data, uniq.bytes, sizeof(void *));
|
|
|
|
/* cycle through all known hooks */
|
|
|
|
LIST_FOREACH(hook, &node->hooks, hooks) {
|
|
|
|
/* don't check special hooks */
|
|
|
|
if ((hook->private == &privp->debug_hook)
|
|
|
|
|| (hook->private == &privp->ethernet_hook))
|
|
|
|
continue;
|
|
|
|
if (uniq.pointer == hook->private)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return (hook);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************************
|
|
|
|
* start of Netgraph entrypoints *
|
|
|
|
**************************************************************************/
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate the private data structure and the generic node
|
|
|
|
* and link them together.
|
|
|
|
*
|
|
|
|
* ng_make_node_common() returns with a generic node struct
|
|
|
|
* with a single reference for us.. we transfer it to the
|
|
|
|
* private structure.. when we free the private struct we must
|
|
|
|
* unref the node so it gets freed too.
|
|
|
|
*
|
|
|
|
* If this were a device node than this work would be done in the attach()
|
|
|
|
* routine and the constructor would return EINVAL as you should not be able
|
|
|
|
* to creatednodes that depend on hardware (unless you can add the hardware :)
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_constructor(node_p *nodep)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
priv_p privdata;
|
|
|
|
int error;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
/* Initialize private descriptor */
|
|
|
|
MALLOC(privdata, priv_p, sizeof(*privdata), M_NETGRAPH, M_WAITOK);
|
|
|
|
if (privdata == NULL)
|
|
|
|
return (ENOMEM);
|
|
|
|
bzero(privdata, sizeof(*privdata));
|
|
|
|
|
|
|
|
/* Call the 'generic' (ie, superclass) node constructor */
|
|
|
|
if ((error = ng_make_node_common(&typestruct, nodep))) {
|
|
|
|
FREE(privdata, M_NETGRAPH);
|
|
|
|
return (error);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Link structs together; this counts as our one reference to *nodep */
|
|
|
|
(*nodep)->private = privdata;
|
|
|
|
privdata->node = *nodep;
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Give our ok for a hook to be added...
|
|
|
|
* point the hook's private info to the hook structure.
|
|
|
|
*
|
|
|
|
* The following hook names are special:
|
|
|
|
* Ethernet: the hook that should be connected to a NIC.
|
|
|
|
* debug: copies of data sent out here (when I write the code).
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
const priv_p privp = node->private;
|
|
|
|
sessp sp;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
if (strcmp(name, NG_PPPOE_HOOK_ETHERNET) == 0) {
|
|
|
|
privp->ethernet_hook = hook;
|
|
|
|
hook->private = &privp->ethernet_hook;
|
|
|
|
} else if (strcmp(name, NG_PPPOE_HOOK_DEBUG) == 0) {
|
|
|
|
privp->debug_hook = hook;
|
|
|
|
hook->private = &privp->debug_hook;
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Any other unique name is OK.
|
|
|
|
* The infrastructure has already checked that it's unique,
|
|
|
|
* so just allocate it and hook it in.
|
|
|
|
*/
|
|
|
|
MALLOC(sp, sessp, sizeof(*sp), M_NETGRAPH, M_WAITOK);
|
|
|
|
if (sp == NULL) {
|
|
|
|
return (ENOMEM);
|
|
|
|
}
|
|
|
|
bzero(sp, sizeof(*sp));
|
|
|
|
|
|
|
|
hook->private = sp;
|
|
|
|
sp->hook = hook;
|
|
|
|
}
|
|
|
|
return(0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Get a netgraph control message.
|
|
|
|
* Check it is one we understand. If needed, send a response.
|
|
|
|
* We sometimes save the address for an async action later.
|
|
|
|
* Always free the message.
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_rcvmsg(node_p node,
|
1999-10-21 09:06:11 +00:00
|
|
|
struct ng_mesg *msg, const char *retaddr, struct ng_mesg **rptr)
|
|
|
|
{
|
|
|
|
priv_p privp = node->private;
|
1999-10-27 11:29:51 +00:00
|
|
|
struct ngpppoe_init_data *ourmsg = NULL;
|
1999-10-21 09:06:11 +00:00
|
|
|
struct ng_mesg *resp = NULL;
|
|
|
|
int error = 0;
|
|
|
|
hook_p hook = NULL;
|
|
|
|
sessp sp = NULL;
|
|
|
|
negp neg = NULL;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
/* Deal with message according to cookie and command */
|
|
|
|
switch (msg->header.typecookie) {
|
|
|
|
case NGM_PPPOE_COOKIE:
|
|
|
|
switch (msg->header.cmd) {
|
|
|
|
case NGM_PPPOE_CONNECT:
|
|
|
|
case NGM_PPPOE_LISTEN:
|
|
|
|
case NGM_PPPOE_OFFER:
|
1999-10-27 11:29:51 +00:00
|
|
|
ourmsg = (struct ngpppoe_init_data *)msg->data;
|
1999-10-21 09:06:11 +00:00
|
|
|
if (( sizeof(*ourmsg) > msg->header.arglen)
|
|
|
|
|| ((sizeof(*ourmsg) + ourmsg->data_len)
|
|
|
|
> msg->header.arglen)) {
|
1999-10-27 11:29:51 +00:00
|
|
|
printf("pppoe_rcvmsg: bad arg size");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(EMSGSIZE);
|
|
|
|
}
|
|
|
|
if (ourmsg->data_len > PPPOE_SERVICE_NAME_SIZE) {
|
|
|
|
printf("pppoe: init data too long (%d)\n",
|
|
|
|
ourmsg->data_len);
|
|
|
|
LEAVE(EMSGSIZE);
|
|
|
|
}
|
|
|
|
/* make sure strcmp will terminate safely */
|
|
|
|
ourmsg->hook[sizeof(ourmsg->hook) - 1] = '\0';
|
|
|
|
|
|
|
|
/* cycle through all known hooks */
|
|
|
|
LIST_FOREACH(hook, &node->hooks, hooks) {
|
|
|
|
if (hook->name
|
|
|
|
&& strcmp(hook->name, ourmsg->hook) == 0)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (hook == NULL) {
|
|
|
|
LEAVE(ENOENT);
|
|
|
|
}
|
|
|
|
if ((hook->private == &privp->debug_hook)
|
|
|
|
|| (hook->private == &privp->ethernet_hook)) {
|
|
|
|
LEAVE(EINVAL);
|
|
|
|
}
|
|
|
|
sp = hook->private;
|
|
|
|
if (sp->state |= PPPOE_SNONE) {
|
|
|
|
printf("pppoe: Session already active\n");
|
|
|
|
LEAVE(EISCONN);
|
|
|
|
}
|
1999-10-23 15:15:42 +00:00
|
|
|
|
1999-10-21 09:06:11 +00:00
|
|
|
/*
|
|
|
|
* set up prototype header
|
|
|
|
*/
|
|
|
|
MALLOC(neg, negp, sizeof(*neg), M_NETGRAPH, M_WAITOK);
|
|
|
|
|
|
|
|
if (neg == NULL) {
|
|
|
|
printf("pppoe: Session out of memory\n");
|
|
|
|
LEAVE(ENOMEM);
|
|
|
|
}
|
|
|
|
bzero(neg, sizeof(*neg));
|
|
|
|
MGETHDR(neg->m, M_DONTWAIT, MT_DATA);
|
|
|
|
if(neg->m == NULL) {
|
1999-10-23 15:15:42 +00:00
|
|
|
printf("pppoe: Session out of mbufs\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
FREE(neg, M_NETGRAPH);
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
|
|
|
neg->m->m_pkthdr.rcvif = NULL;
|
|
|
|
MCLGET(neg->m, M_DONTWAIT);
|
|
|
|
if ((neg->m->m_flags & M_EXT) == 0) {
|
1999-10-23 15:15:42 +00:00
|
|
|
printf("pppoe: Session out of mcls\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
m_freem(neg->m);
|
|
|
|
FREE(neg, M_NETGRAPH);
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
|
|
|
sp->neg = neg;
|
1999-10-23 15:15:42 +00:00
|
|
|
callout_handle_init( &neg->timeout_handle);
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->m->m_len = sizeof(struct pppoe_full_hdr);
|
|
|
|
neg->pkt = mtod(neg->m, union packet*);
|
|
|
|
neg->pkt->pkt_header.eh = eh_prototype;
|
|
|
|
neg->pkt->pkt_header.ph.ver = 0x1;
|
|
|
|
neg->pkt->pkt_header.ph.type = 0x1;
|
|
|
|
neg->pkt->pkt_header.ph.sid = 0x0000;
|
|
|
|
neg->timeout = 0;
|
|
|
|
|
|
|
|
strncpy(sp->creator, retaddr, NG_NODELEN);
|
|
|
|
sp->creator[NG_NODELEN] = '\0';
|
|
|
|
}
|
|
|
|
switch (msg->header.cmd) {
|
|
|
|
case NGM_PPPOE_GET_STATUS:
|
|
|
|
{
|
1999-10-27 11:29:51 +00:00
|
|
|
struct ngpppoestat *stats;
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
|
|
|
|
if (!resp) {
|
|
|
|
LEAVE(ENOMEM);
|
|
|
|
}
|
1999-10-27 11:29:51 +00:00
|
|
|
stats = (struct ngpppoestat *) resp->data;
|
1999-10-21 09:06:11 +00:00
|
|
|
stats->packets_in = privp->packets_in;
|
|
|
|
stats->packets_out = privp->packets_out;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case NGM_PPPOE_CONNECT:
|
|
|
|
/*
|
|
|
|
* Check the hook exists and is Uninitialised.
|
|
|
|
* Send a PADI request, and start the timeout logic.
|
|
|
|
* Store the originator of this message so we can send
|
|
|
|
* a success of fail message to them later.
|
|
|
|
* Move the session to SINIT
|
|
|
|
* Set up the session to the correct state and
|
|
|
|
* start it.
|
|
|
|
*/
|
|
|
|
neg->service.hdr.tag_type = PTT_SRV_NAME;
|
|
|
|
neg->service.hdr.tag_len =
|
|
|
|
htons((u_int16_t)ourmsg->data_len);
|
1999-10-23 15:15:42 +00:00
|
|
|
if (ourmsg->data_len) {
|
|
|
|
bcopy(ourmsg->data,
|
|
|
|
neg->service.data, ourmsg->data_len);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->service_len = ourmsg->data_len;
|
|
|
|
pppoe_start(sp);
|
|
|
|
break;
|
|
|
|
case NGM_PPPOE_LISTEN:
|
|
|
|
/*
|
|
|
|
* Check the hook exists and is Uninitialised.
|
|
|
|
* Install the service matching string.
|
|
|
|
* Store the originator of this message so we can send
|
|
|
|
* a success of fail message to them later.
|
|
|
|
* Move the hook to 'LISTENING'
|
1999-10-23 15:15:42 +00:00
|
|
|
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
|
|
|
neg->service.hdr.tag_type = PTT_SRV_NAME;
|
|
|
|
neg->service.hdr.tag_len =
|
|
|
|
htons((u_int16_t)ourmsg->data_len);
|
1999-10-23 15:15:42 +00:00
|
|
|
|
|
|
|
if (ourmsg->data_len) {
|
|
|
|
bcopy(ourmsg->data,
|
|
|
|
neg->service.data, ourmsg->data_len);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->service_len = ourmsg->data_len;
|
|
|
|
neg->pkt->pkt_header.ph.code = PADT_CODE;
|
|
|
|
/*
|
|
|
|
* wait for PADI packet coming from ethernet
|
|
|
|
*/
|
|
|
|
sp->state = PPPOE_LISTENING;
|
|
|
|
break;
|
|
|
|
case NGM_PPPOE_OFFER:
|
|
|
|
/*
|
|
|
|
* Check the hook exists and is Uninitialised.
|
|
|
|
* Store the originator of this message so we can send
|
|
|
|
* a success of fail message to them later.
|
|
|
|
* Store the AC-Name given and go to PRIMED.
|
|
|
|
*/
|
|
|
|
neg->ac_name.hdr.tag_type = PTT_AC_NAME;
|
|
|
|
neg->ac_name.hdr.tag_len =
|
|
|
|
htons((u_int16_t)ourmsg->data_len);
|
1999-10-23 15:15:42 +00:00
|
|
|
if (ourmsg->data_len) {
|
|
|
|
bcopy(ourmsg->data,
|
|
|
|
neg->ac_name.data, ourmsg->data_len);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->ac_name_len = ourmsg->data_len;
|
|
|
|
neg->pkt->pkt_header.ph.code = PADO_CODE;
|
|
|
|
/*
|
|
|
|
* Wait for PADI packet coming from hook
|
|
|
|
*/
|
|
|
|
sp->state = PPPOE_PRIMED;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LEAVE(EINVAL);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LEAVE(EINVAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Take care of synchronous response, if any */
|
|
|
|
if (rptr)
|
|
|
|
*rptr = resp;
|
|
|
|
else if (resp)
|
|
|
|
FREE(resp, M_NETGRAPH);
|
|
|
|
|
|
|
|
/* Free the message and return */
|
|
|
|
quit:
|
|
|
|
FREE(msg, M_NETGRAPH);
|
|
|
|
return(error);
|
|
|
|
}
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
/*
|
|
|
|
* Start a client into the first state. A separate function because
|
|
|
|
* it can be needed if the negotiation times out.
|
|
|
|
*/
|
1999-10-21 09:06:11 +00:00
|
|
|
static void
|
|
|
|
pppoe_start(sessp sp)
|
|
|
|
{
|
|
|
|
struct {
|
|
|
|
struct pppoe_tag hdr;
|
|
|
|
union uniq data;
|
|
|
|
} uniqtag;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* kick the state machine into starting up
|
|
|
|
*/
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
sp->state = PPPOE_SINIT;
|
1999-10-23 15:15:42 +00:00
|
|
|
/* reset the packet header to broadcast */
|
|
|
|
sp->neg->pkt->pkt_header.eh = eh_prototype;
|
|
|
|
sp->neg->pkt->pkt_header.ph.code = PADI_CODE;
|
1999-10-21 09:06:11 +00:00
|
|
|
uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
|
|
|
|
uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
|
|
|
|
uniqtag.data.pointer = sp;
|
|
|
|
init_tags(sp);
|
|
|
|
insert_tag(sp, &uniqtag.hdr);
|
|
|
|
insert_tag(sp, &sp->neg->service.hdr);
|
|
|
|
make_packet(sp);
|
|
|
|
sendpacket(sp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Receive data, and do something with it.
|
|
|
|
* The caller will never free m or meta, so
|
|
|
|
* if we use up this data or abort we must free BOTH of these.
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
node_p node = hook->node;
|
|
|
|
const priv_p privp = node->private;
|
|
|
|
sessp sp = hook->private;
|
|
|
|
struct pppoe_full_hdr *wh;
|
|
|
|
struct pppoe_hdr *ph;
|
|
|
|
int error = 0;
|
|
|
|
u_int16_t session;
|
|
|
|
u_int16_t length;
|
|
|
|
u_int8_t code;
|
|
|
|
struct pppoe_tag *tag = NULL;
|
|
|
|
hook_p sendhook;
|
|
|
|
struct {
|
|
|
|
struct pppoe_tag hdr;
|
|
|
|
union uniq data;
|
|
|
|
} uniqtag;
|
|
|
|
negp neg = NULL;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
if (hook->private == &privp->debug_hook) {
|
|
|
|
/*
|
|
|
|
* Data from the debug hook gets sent without modification
|
|
|
|
* straight to the ethernet.
|
|
|
|
*/
|
|
|
|
NG_SEND_DATA( error, privp->ethernet_hook, m, meta);
|
|
|
|
privp->packets_out++;
|
|
|
|
} else if (hook->private == &privp->ethernet_hook) {
|
|
|
|
/*
|
|
|
|
* Incoming data.
|
|
|
|
* Dig out various fields from the packet.
|
|
|
|
* use them to decide where to send it.
|
|
|
|
*/
|
|
|
|
|
|
|
|
privp->packets_in++;
|
1999-10-26 08:08:48 +00:00
|
|
|
if( m->m_len < sizeof(*wh)) {
|
|
|
|
m = m_pullup(m, sizeof(*wh)); /* Checks length */
|
|
|
|
if (m == NULL) {
|
|
|
|
printf("couldn't m_pullup\n");
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
}
|
|
|
|
wh = mtod(m, struct pppoe_full_hdr *);
|
|
|
|
ph = &wh->ph;
|
|
|
|
session = ntohs(wh->ph.sid);
|
|
|
|
length = ntohs(wh->ph.length);
|
|
|
|
code = wh->ph.code;
|
1999-10-26 08:08:48 +00:00
|
|
|
switch(wh->eh.ether_type) {
|
1999-10-21 09:06:11 +00:00
|
|
|
case ETHERTYPE_PPPOE_DISC:
|
|
|
|
/*
|
|
|
|
* We need to try make sure that the tag area
|
|
|
|
* is contiguous, or we could wander of the end
|
|
|
|
* of a buffer and make a mess.
|
|
|
|
* (Linux wouldn't have this problem).
|
|
|
|
*/
|
1999-10-26 08:08:48 +00:00
|
|
|
/*XXX fix this mess */
|
|
|
|
|
|
|
|
if (m->m_pkthdr.len <= MHLEN) {
|
|
|
|
if( m->m_len < m->m_pkthdr.len) {
|
|
|
|
m = m_pullup(m, m->m_pkthdr.len);
|
|
|
|
if (m == NULL) {
|
|
|
|
printf("couldn't m_pullup\n");
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (m->m_len != m->m_pkthdr.len) {
|
1999-10-21 09:06:11 +00:00
|
|
|
/*
|
|
|
|
* It's not all in one piece.
|
|
|
|
* We need to do extra work.
|
|
|
|
*/
|
|
|
|
printf("packet fragmented\n");
|
1999-10-23 22:46:38 +00:00
|
|
|
LEAVE(EMSGSIZE);
|
1999-10-21 09:06:11 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
switch(code) {
|
|
|
|
case PADI_CODE:
|
|
|
|
/*
|
|
|
|
* We are a server:
|
|
|
|
* Look for a hook with the required service
|
|
|
|
* and send the ENTIRE packet up there.
|
|
|
|
* It should come back to a new hook in
|
|
|
|
* PRIMED state. Look there for further
|
|
|
|
* processing.
|
|
|
|
*/
|
|
|
|
tag = get_tag(ph, PTT_SRV_NAME);
|
|
|
|
if (tag == NULL) {
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("no service tag\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
sendhook = pppoe_match_svc(hook->node,
|
|
|
|
tag->tag_data, ntohs(tag->tag_len));
|
|
|
|
if (sendhook) {
|
|
|
|
NG_SEND_DATA(error, sendhook, m, meta);
|
|
|
|
} else {
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("no such service\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case PADO_CODE:
|
|
|
|
/*
|
|
|
|
* We are a client:
|
|
|
|
* Use the host_uniq tag to find the
|
|
|
|
* hook this is in response to.
|
1999-10-23 22:46:38 +00:00
|
|
|
* Received #2, now send #3
|
1999-10-21 09:06:11 +00:00
|
|
|
* For now simply accept the first we receive.
|
|
|
|
*/
|
|
|
|
tag = get_tag(ph, PTT_HOST_UNIQ);
|
|
|
|
if ((tag == NULL)
|
|
|
|
|| (ntohs(tag->tag_len) != sizeof(sp))) {
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("no host unique field\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
|
|
|
|
sendhook = pppoe_finduniq(node, tag);
|
|
|
|
if (sendhook == NULL) {
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("no matching session\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check the session is in the right state.
|
|
|
|
* It needs to be in PPPOE_SINIT.
|
|
|
|
*/
|
|
|
|
sp = sendhook->private;
|
|
|
|
if (sp->state != PPPOE_SINIT) {
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("session in wrong state\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
neg = sp->neg;
|
|
|
|
untimeout(pppoe_ticker, sendhook,
|
|
|
|
neg->timeout_handle);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the first time we hear
|
|
|
|
* from the server, so note it's
|
|
|
|
* unicast address, replacing the
|
|
|
|
* broadcast address .
|
|
|
|
*/
|
|
|
|
bcopy(wh->eh.ether_shost,
|
|
|
|
neg->pkt->pkt_header.eh.ether_dhost,
|
|
|
|
ETHER_ADDR_LEN);
|
|
|
|
neg->timeout = 0;
|
|
|
|
neg->pkt->pkt_header.ph.code = PADR_CODE;
|
|
|
|
init_tags(sp);
|
1999-10-23 22:46:38 +00:00
|
|
|
insert_tag(sp, &neg->service.hdr); /* Service */
|
1999-10-21 09:06:11 +00:00
|
|
|
insert_tag(sp, tag); /* Host Unique */
|
|
|
|
tag = get_tag(ph, PTT_AC_COOKIE);
|
1999-10-26 09:25:18 +00:00
|
|
|
if (tag)
|
|
|
|
insert_tag(sp, tag); /* return cookie */
|
|
|
|
tag = get_tag(ph, PTT_AC_NAME);
|
1999-10-23 22:46:38 +00:00
|
|
|
if (tag)
|
|
|
|
insert_tag(sp, tag); /* return cookie */
|
1999-10-21 09:06:11 +00:00
|
|
|
scan_tags(sp, ph);
|
|
|
|
make_packet(sp);
|
|
|
|
sp->state = PPPOE_SREQ;
|
|
|
|
sendpacket(sp);
|
|
|
|
break;
|
|
|
|
case PADR_CODE:
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We are a server:
|
|
|
|
* Use the ac_cookie tag to find the
|
|
|
|
* hook this is in response to.
|
|
|
|
*/
|
|
|
|
tag = get_tag(ph, PTT_AC_COOKIE);
|
|
|
|
if ((tag == NULL)
|
|
|
|
|| (ntohs(tag->tag_len) != sizeof(sp))) {
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
|
|
|
|
sendhook = pppoe_finduniq(node, tag);
|
|
|
|
if (sendhook == NULL) {
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check the session is in the right state.
|
|
|
|
* It needs to be in PPPOE_SOFFER
|
|
|
|
* or PPPOE_NEWCONNECTED. If the latter,
|
|
|
|
* then this is a retry by the client.
|
|
|
|
* so be nice, and resend.
|
|
|
|
*/
|
|
|
|
sp = sendhook->private;
|
|
|
|
if (sp->state == PPPOE_NEWCONNECTED) {
|
|
|
|
/*
|
|
|
|
* Whoa! drop back to resend that
|
|
|
|
* PADS packet.
|
|
|
|
* We should still have a copy of it.
|
|
|
|
*/
|
|
|
|
sp->state = PPPOE_SOFFER;
|
|
|
|
}
|
|
|
|
if (sp->state != PPPOE_SOFFER) {
|
|
|
|
LEAVE (ENETUNREACH);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
neg = sp->neg;
|
|
|
|
untimeout(pppoe_ticker, sendhook,
|
|
|
|
neg->timeout_handle);
|
|
|
|
neg->pkt->pkt_header.ph.code = PADS_CODE;
|
|
|
|
if (sp->Session_ID == 0)
|
|
|
|
neg->pkt->pkt_header.ph.sid =
|
1999-10-23 22:46:38 +00:00
|
|
|
htons(sp->Session_ID
|
|
|
|
= get_new_sid(node));
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->timeout = 0;
|
|
|
|
/*
|
|
|
|
* start working out the tags to respond with.
|
|
|
|
*/
|
|
|
|
init_tags(sp);
|
|
|
|
insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
|
|
|
|
insert_tag(sp, tag); /* ac_cookie */
|
|
|
|
tag = get_tag(ph, PTT_SRV_NAME);
|
1999-11-14 10:21:26 +00:00
|
|
|
if (tag) {
|
|
|
|
insert_tag(sp, tag);/* return service */
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
tag = get_tag(ph, PTT_HOST_UNIQ);
|
1999-11-14 10:21:26 +00:00
|
|
|
if (tag && ntohs(tag->tag_len) != sizeof(sp)) {
|
|
|
|
insert_tag(sp, tag); /* return it */
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
scan_tags(sp, ph);
|
|
|
|
make_packet(sp);
|
|
|
|
sp->state = PPPOE_NEWCONNECTED;
|
|
|
|
sendpacket(sp);
|
1999-10-23 04:28:11 +00:00
|
|
|
pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
|
1999-10-21 09:06:11 +00:00
|
|
|
/*
|
|
|
|
* Having sent the last Negotiation header,
|
|
|
|
* Set up the stored packet header to
|
|
|
|
* be correct for the actual session.
|
|
|
|
* But keep the negotialtion stuff
|
|
|
|
* around in case we need to resend this last
|
|
|
|
* packet. We'll discard it when we move
|
|
|
|
* from NEWCONNECTED to CONNECTED
|
|
|
|
*/
|
|
|
|
sp->pkt_hdr = neg->pkt->pkt_header;
|
|
|
|
sp->pkt_hdr.eh.ether_type
|
|
|
|
= ETHERTYPE_PPPOE_SESS;
|
|
|
|
sp->pkt_hdr.ph.code = 0;
|
1999-10-23 04:28:11 +00:00
|
|
|
pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
|
1999-10-21 09:06:11 +00:00
|
|
|
break;
|
|
|
|
case PADS_CODE:
|
|
|
|
/*
|
|
|
|
* We are a client:
|
|
|
|
* Use the host_uniq tag to find the
|
|
|
|
* hook this is in response to.
|
|
|
|
* take the session ID and store it away.
|
|
|
|
* Also make sure the pre-made header is
|
|
|
|
* correct and set us into Session mode.
|
|
|
|
*/
|
|
|
|
tag = get_tag(ph, PTT_HOST_UNIQ);
|
|
|
|
if ((tag == NULL)
|
|
|
|
|| (ntohs(tag->tag_len) != sizeof(sp))) {
|
|
|
|
LEAVE (ENETUNREACH);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
sendhook = pppoe_finduniq(node, tag);
|
|
|
|
if (sendhook == NULL) {
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check the session is in the right state.
|
|
|
|
* It needs to be in PPPOE_SREQ.
|
|
|
|
*/
|
|
|
|
sp = sendhook->private;
|
|
|
|
if (sp->state != PPPOE_SREQ) {
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
neg = sp->neg;
|
|
|
|
untimeout(pppoe_ticker, sendhook,
|
|
|
|
neg->timeout_handle);
|
1999-10-26 11:26:23 +00:00
|
|
|
neg->pkt->pkt_header.ph.sid = wh->ph.sid;
|
1999-10-23 22:46:38 +00:00
|
|
|
sp->Session_ID = ntohs(wh->ph.sid);
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->timeout = 0;
|
|
|
|
sp->state = PPPOE_CONNECTED;
|
|
|
|
/*
|
|
|
|
* Now we have gone to Connected mode,
|
|
|
|
* Free all resources needed for
|
|
|
|
* negotiation.
|
|
|
|
* Keep a copy of the header we will be using.
|
|
|
|
*/
|
|
|
|
sp->pkt_hdr = neg->pkt->pkt_header;
|
|
|
|
sp->pkt_hdr.eh.ether_type
|
|
|
|
= ETHERTYPE_PPPOE_SESS;
|
|
|
|
sp->pkt_hdr.ph.code = 0;
|
|
|
|
m_freem(neg->m);
|
|
|
|
FREE(sp->neg, M_NETGRAPH);
|
|
|
|
sp->neg = NULL;
|
1999-10-23 04:28:11 +00:00
|
|
|
pppoe_send_event(sp, NGM_PPPOE_SUCCESS);
|
1999-10-21 09:06:11 +00:00
|
|
|
break;
|
|
|
|
case PADT_CODE:
|
|
|
|
/*
|
|
|
|
* Send a 'close' message to the controlling
|
|
|
|
* process (the one that set us up);
|
|
|
|
* And then tear everything down.
|
|
|
|
*
|
|
|
|
* Find matching peer/session combination.
|
|
|
|
*/
|
|
|
|
sendhook = pppoe_findsession(node, wh);
|
|
|
|
NG_FREE_DATA(m, meta); /* no longer needed */
|
|
|
|
if (sendhook == NULL) {
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
/* send message to creator */
|
|
|
|
/* close hook */
|
1999-10-23 04:28:11 +00:00
|
|
|
if (sendhook) {
|
|
|
|
ng_destroy_hook(sendhook);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LEAVE(EPFNOSUPPORT);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case ETHERTYPE_PPPOE_SESS:
|
|
|
|
/*
|
|
|
|
* find matching peer/session combination.
|
|
|
|
*/
|
|
|
|
sendhook = pppoe_findsession(node, wh);
|
|
|
|
if (sendhook == NULL) {
|
|
|
|
LEAVE (ENETUNREACH);
|
|
|
|
break;
|
|
|
|
}
|
1999-10-26 09:25:18 +00:00
|
|
|
sp = sendhook->private;
|
1999-10-21 09:06:11 +00:00
|
|
|
m_adj(m, sizeof(*wh));
|
|
|
|
if (m->m_pkthdr.len < length) {
|
|
|
|
/* Packet too short, dump it */
|
|
|
|
LEAVE(EMSGSIZE);
|
|
|
|
}
|
1999-10-26 11:04:25 +00:00
|
|
|
|
1999-11-14 10:21:26 +00:00
|
|
|
/* Also need to trim excess at the end */
|
1999-10-26 11:04:25 +00:00
|
|
|
if (m->m_pkthdr.len > length) {
|
|
|
|
m_adj(m, -((int)(m->m_pkthdr.len - length)));
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
if ( sp->state != PPPOE_CONNECTED) {
|
|
|
|
if (sp->state == PPPOE_NEWCONNECTED) {
|
|
|
|
sp->state = PPPOE_CONNECTED;
|
|
|
|
/*
|
|
|
|
* Now we have gone to Connected mode,
|
|
|
|
* Free all resources needed for
|
|
|
|
* negotiation.
|
|
|
|
*/
|
|
|
|
m_freem(sp->neg->m);
|
|
|
|
FREE(sp->neg, M_NETGRAPH);
|
|
|
|
sp->neg = NULL;
|
|
|
|
} else {
|
|
|
|
LEAVE (ENETUNREACH);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
NG_SEND_DATA( error, sendhook, m, meta);
|
|
|
|
break;
|
|
|
|
default:
|
1999-10-26 09:25:18 +00:00
|
|
|
LEAVE(EPFNOSUPPORT);
|
1999-10-21 09:06:11 +00:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/*
|
|
|
|
* Not ethernet or debug hook..
|
|
|
|
*
|
|
|
|
* The packet has come in on a normal hook.
|
|
|
|
* We need to find out what kind of hook,
|
|
|
|
* So we can decide how to handle it.
|
|
|
|
* Check the hook's state.
|
|
|
|
*/
|
|
|
|
sp = hook->private;
|
|
|
|
switch (sp->state) {
|
|
|
|
case PPPOE_NEWCONNECTED:
|
|
|
|
case PPPOE_CONNECTED: {
|
|
|
|
struct pppoe_full_hdr *wh;
|
|
|
|
/*
|
|
|
|
* Bang in a pre-made header, and set the length up
|
|
|
|
* to be correct. Then send it to the ethernet driver.
|
1999-10-29 04:32:27 +00:00
|
|
|
* But first correct the length.
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
1999-10-29 04:32:27 +00:00
|
|
|
sp->pkt_hdr.ph.length = htons((short)(m->m_pkthdr.len));
|
1999-10-21 09:06:11 +00:00
|
|
|
M_PREPEND(m, sizeof(*wh), M_DONTWAIT);
|
|
|
|
if (m == NULL) {
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
|
|
|
wh = mtod(m, struct pppoe_full_hdr *);
|
|
|
|
bcopy(&sp->pkt_hdr, wh, sizeof(*wh));
|
|
|
|
NG_SEND_DATA( error, privp->ethernet_hook, m, meta);
|
|
|
|
privp->packets_out++;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
case PPPOE_PRIMED:
|
|
|
|
/*
|
|
|
|
* A PADI packet is being returned by the application
|
|
|
|
* that has set up this hook. This indicates that it
|
|
|
|
* wants us to offer service.
|
|
|
|
*/
|
|
|
|
neg = sp->neg;
|
1999-10-26 22:33:54 +00:00
|
|
|
if (m->m_len < sizeof(*wh))
|
|
|
|
m_pullup(m, sizeof(*wh));
|
1999-10-21 09:06:11 +00:00
|
|
|
if (m == NULL) {
|
|
|
|
LEAVE(ENOBUFS);
|
|
|
|
}
|
|
|
|
wh = mtod(m, struct pppoe_full_hdr *);
|
|
|
|
ph = &wh->ph;
|
|
|
|
session = ntohs(wh->ph.sid);
|
|
|
|
length = ntohs(wh->ph.length);
|
|
|
|
code = wh->ph.code;
|
1999-10-23 15:15:42 +00:00
|
|
|
if ( code != PADI_CODE) {
|
|
|
|
LEAVE(EINVAL);
|
|
|
|
};
|
|
|
|
untimeout(pppoe_ticker, hook,
|
|
|
|
neg->timeout_handle);
|
1999-10-21 09:06:11 +00:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This is the first time we hear
|
|
|
|
* from the client, so note it's
|
|
|
|
* unicast address, replacing the
|
1999-11-14 10:21:26 +00:00
|
|
|
* broadcast address.
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
|
|
|
bcopy(wh->eh.ether_shost,
|
|
|
|
neg->pkt->pkt_header.eh.ether_dhost,
|
|
|
|
ETHER_ADDR_LEN);
|
|
|
|
sp->state = PPPOE_SOFFER;
|
|
|
|
neg->timeout = 0;
|
|
|
|
neg->pkt->pkt_header.ph.code = PADO_CODE;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* start working out the tags to respond with.
|
|
|
|
*/
|
|
|
|
uniqtag.hdr.tag_type = PTT_AC_COOKIE;
|
|
|
|
uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(sp));
|
|
|
|
uniqtag.data.pointer = sp;
|
|
|
|
init_tags(sp);
|
|
|
|
insert_tag(sp, &neg->ac_name.hdr); /* AC_NAME */
|
1999-11-09 00:31:04 +00:00
|
|
|
tag = get_tag(ph, PTT_HOST_UNIQ);
|
1999-11-14 10:21:26 +00:00
|
|
|
if (tag && ntohs(tag->tag_len) == sizeof(sp)) {
|
|
|
|
insert_tag(sp, tag); /* returned hostunique */
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
insert_tag(sp, &uniqtag.hdr); /* AC cookie */
|
|
|
|
tag = get_tag(ph, PTT_SRV_NAME);
|
1999-11-14 10:21:26 +00:00
|
|
|
if (tag) {
|
|
|
|
insert_tag(sp, tag); /* return service */
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
/* XXX maybe put the tag in the session store */
|
|
|
|
scan_tags(sp, ph);
|
|
|
|
make_packet(sp);
|
|
|
|
sendpacket(sp);
|
|
|
|
break;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Packets coming from the hook make no sense
|
|
|
|
* to sessions in these states. Throw them away.
|
|
|
|
*/
|
|
|
|
case PPPOE_SINIT:
|
|
|
|
case PPPOE_SREQ:
|
|
|
|
case PPPOE_SOFFER:
|
|
|
|
case PPPOE_SNONE:
|
|
|
|
case PPPOE_LISTENING:
|
|
|
|
case PPPOE_DEAD:
|
|
|
|
default:
|
|
|
|
LEAVE(ENETUNREACH);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
quit:
|
|
|
|
NG_FREE_DATA(m, meta);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Do local shutdown processing..
|
|
|
|
* If we are a persistant device, we might refuse to go away, and
|
|
|
|
* we'd only remove our links and reset ourself.
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_rmnode(node_p node)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
const priv_p privdata = node->private;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
node->flags |= NG_INVALID;
|
|
|
|
ng_cutlinks(node);
|
|
|
|
ng_unname(node);
|
|
|
|
node->private = NULL;
|
|
|
|
ng_unref(privdata->node);
|
|
|
|
FREE(privdata, M_NETGRAPH);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* This is called once we've already connected a new hook to the other node.
|
|
|
|
* It gives us a chance to balk at the last minute.
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_connect(hook_p hook)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
/* be really amiable and just say "YUP that's OK by me! " */
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Hook disconnection
|
|
|
|
*
|
|
|
|
* Clean up all dangling links and infirmation about the session/hook.
|
|
|
|
* For this type, removal of the last link destroys the node
|
|
|
|
*/
|
|
|
|
static int
|
1999-10-27 11:29:51 +00:00
|
|
|
ng_pppoe_disconnect(hook_p hook)
|
1999-10-21 09:06:11 +00:00
|
|
|
{
|
|
|
|
node_p node = hook->node;
|
|
|
|
priv_p privp = node->private;
|
|
|
|
sessp sp;
|
1999-10-27 11:48:35 +00:00
|
|
|
int hooks;
|
1999-10-21 09:06:11 +00:00
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
if (hook->private == &privp->debug_hook) {
|
|
|
|
privp->debug_hook = NULL;
|
|
|
|
} else if (hook->private == &privp->ethernet_hook) {
|
|
|
|
privp->ethernet_hook = NULL;
|
1999-10-27 11:48:35 +00:00
|
|
|
ng_rmnode(node);
|
1999-10-21 09:06:11 +00:00
|
|
|
} else {
|
|
|
|
sp = hook->private;
|
1999-10-23 04:28:11 +00:00
|
|
|
if (sp->state != PPPOE_SNONE ) {
|
|
|
|
pppoe_send_event(sp, NGM_PPPOE_CLOSE);
|
|
|
|
}
|
1999-10-26 11:04:25 +00:00
|
|
|
if ((privp->ethernet_hook)
|
|
|
|
&& ((sp->state == PPPOE_CONNECTED)
|
|
|
|
|| (sp->state == PPPOE_NEWCONNECTED))) {
|
|
|
|
struct mbuf *m;
|
|
|
|
struct pppoe_full_hdr *wh;
|
|
|
|
struct pppoe_tag *tag;
|
|
|
|
int msglen = strlen(SIGNOFF);
|
|
|
|
void *dummy = NULL;
|
|
|
|
int error = 0;
|
|
|
|
|
|
|
|
/* revert the stored header to DISC/PADT mode */
|
|
|
|
wh = &sp->pkt_hdr;
|
|
|
|
wh->ph.code = PADT_CODE;
|
|
|
|
wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;
|
|
|
|
|
|
|
|
/* generate a packet of that type */
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
|
|
m->m_pkthdr.rcvif = NULL;
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(*wh);
|
|
|
|
bcopy((caddr_t)wh, mtod(m, caddr_t), sizeof(*wh));
|
|
|
|
/* Add a General error message and adjust sizes */
|
|
|
|
wh = mtod(m, struct pppoe_full_hdr *);
|
|
|
|
tag = wh->ph.tag;
|
|
|
|
tag->tag_type = PTT_GEN_ERR;
|
|
|
|
tag->tag_len = htons((u_int16_t)msglen);
|
|
|
|
strncpy(tag->tag_data, SIGNOFF, msglen);
|
|
|
|
m->m_pkthdr.len = (m->m_len += sizeof(*tag) + msglen);
|
|
|
|
wh->ph.length = htons(sizeof(*tag) + msglen);
|
1999-10-26 11:26:23 +00:00
|
|
|
NG_SEND_DATA(error, privp->ethernet_hook, m, dummy);
|
1999-10-26 11:04:25 +00:00
|
|
|
}
|
1999-10-23 15:15:42 +00:00
|
|
|
if (sp->neg) {
|
|
|
|
untimeout(pppoe_ticker, hook, sp->neg->timeout_handle);
|
|
|
|
if (sp->neg->m)
|
|
|
|
m_freem(sp->neg->m);
|
|
|
|
FREE(sp->neg, M_NETGRAPH);
|
|
|
|
}
|
1999-10-21 09:06:11 +00:00
|
|
|
FREE(sp, M_NETGRAPH);
|
1999-10-23 15:15:42 +00:00
|
|
|
hook->private = NULL;
|
1999-10-27 11:53:53 +00:00
|
|
|
/* work out how many session hooks there are */
|
1999-10-27 11:48:35 +00:00
|
|
|
/* Node goes away on last session hook removal */
|
|
|
|
hooks = node->numhooks; /* this one already not counted */
|
|
|
|
if (privp->ethernet_hook) hooks -= 1;
|
1999-10-27 11:53:53 +00:00
|
|
|
if (privp->debug_hook) hooks -= 1;
|
1999-10-27 11:48:35 +00:00
|
|
|
if (hooks == 0)
|
|
|
|
ng_rmnode(node);
|
1999-10-21 09:06:11 +00:00
|
|
|
}
|
|
|
|
if (node->numhooks == 0)
|
|
|
|
ng_rmnode(node);
|
|
|
|
return (0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* timeouts come here.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
pppoe_ticker(void *arg)
|
|
|
|
{
|
|
|
|
int s = splnet();
|
|
|
|
hook_p hook = arg;
|
|
|
|
sessp sp = hook->private;
|
|
|
|
negp neg = sp->neg;
|
|
|
|
int error = 0;
|
|
|
|
struct mbuf *m0 = NULL;
|
|
|
|
priv_p privp = hook->node->private;
|
|
|
|
meta_p dummy = NULL;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
switch(sp->state) {
|
|
|
|
/*
|
|
|
|
* resend the last packet, using an exponential backoff.
|
|
|
|
* After a period of time, stop growing the backoff,
|
1999-11-14 10:21:26 +00:00
|
|
|
* and either leave it, or revert to the start.
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
|
|
|
case PPPOE_SINIT:
|
|
|
|
case PPPOE_SREQ:
|
|
|
|
/* timeouts on these produce resends */
|
|
|
|
m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
|
|
|
|
NG_SEND_DATA( error, privp->ethernet_hook, m0, dummy);
|
|
|
|
neg->timeout_handle = timeout(pppoe_ticker,
|
|
|
|
hook, neg->timeout * hz);
|
|
|
|
if ((neg->timeout <<= 1) > PPPOE_TIMEOUT_LIMIT) {
|
|
|
|
if (sp->state == PPPOE_SREQ) {
|
|
|
|
/* revert to SINIT mode */
|
1999-10-23 04:28:11 +00:00
|
|
|
pppoe_start(sp);
|
1999-10-21 09:06:11 +00:00
|
|
|
} else {
|
|
|
|
neg->timeout = PPPOE_TIMEOUT_LIMIT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case PPPOE_PRIMED:
|
|
|
|
case PPPOE_SOFFER:
|
|
|
|
/* a timeout on these says "give up" */
|
|
|
|
ng_destroy_hook(hook);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* timeouts have no meaning in other states */
|
|
|
|
printf("pppoe: unexpected timeout\n");
|
|
|
|
}
|
|
|
|
splx(s);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
sendpacket(sessp sp)
|
|
|
|
{
|
|
|
|
int error = 0;
|
|
|
|
struct mbuf *m0 = NULL;
|
|
|
|
hook_p hook = sp->hook;
|
|
|
|
negp neg = sp->neg;
|
|
|
|
priv_p privp = hook->node->private;
|
|
|
|
meta_p dummy = NULL;
|
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
switch(sp->state) {
|
|
|
|
case PPPOE_LISTENING:
|
|
|
|
case PPPOE_DEAD:
|
|
|
|
case PPPOE_SNONE:
|
|
|
|
case PPPOE_NEWCONNECTED:
|
|
|
|
case PPPOE_CONNECTED:
|
1999-10-23 22:46:38 +00:00
|
|
|
printf("pppoe: sendpacket: unexpected state\n");
|
1999-10-21 09:06:11 +00:00
|
|
|
break;
|
|
|
|
|
|
|
|
case PPPOE_PRIMED:
|
|
|
|
/* No packet to send, but set up the timeout */
|
|
|
|
neg->timeout_handle = timeout(pppoe_ticker,
|
|
|
|
hook, PPPOE_OFFER_TIMEOUT * hz);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PPPOE_SOFFER:
|
|
|
|
/*
|
|
|
|
* send the offer but if they don't respond
|
|
|
|
* in PPPOE_OFFER_TIMEOUT seconds, forget about it.
|
|
|
|
*/
|
|
|
|
m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
|
|
|
|
NG_SEND_DATA( error, privp->ethernet_hook, m0, dummy);
|
|
|
|
neg->timeout_handle = timeout(pppoe_ticker,
|
|
|
|
hook, PPPOE_OFFER_TIMEOUT * hz);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case PPPOE_SINIT:
|
|
|
|
case PPPOE_SREQ:
|
|
|
|
m0 = m_copypacket(sp->neg->m, M_DONTWAIT);
|
1999-10-23 22:46:38 +00:00
|
|
|
NG_SEND_DATA( error, privp->ethernet_hook, m0, dummy);
|
1999-10-21 09:06:11 +00:00
|
|
|
neg->timeout_handle = timeout(pppoe_ticker, hook, hz);
|
|
|
|
neg->timeout = 2;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
error = EINVAL;
|
|
|
|
printf("pppoe: timeout: bad state\n");
|
|
|
|
}
|
|
|
|
/* return (error); */
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Parse an incoming packet to see if any tags should be copied to the
|
1999-11-14 10:21:26 +00:00
|
|
|
* output packet. Don't do any tags that have been handled in the main
|
|
|
|
* state machine.
|
1999-10-21 09:06:11 +00:00
|
|
|
*/
|
|
|
|
static struct pppoe_tag*
|
|
|
|
scan_tags(sessp sp, struct pppoe_hdr* ph)
|
|
|
|
{
|
|
|
|
char *end = (char *)next_tag(ph);
|
|
|
|
char *ptn;
|
|
|
|
struct pppoe_tag *pt = &ph->tag[0];
|
|
|
|
/*
|
|
|
|
* Keep processing tags while a tag header will still fit.
|
|
|
|
*/
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-21 09:06:11 +00:00
|
|
|
while((char*)(pt + 1) <= end) {
|
|
|
|
/*
|
|
|
|
* If the tag data would go past the end of the packet, abort.
|
|
|
|
*/
|
|
|
|
ptn = (((char *)(pt + 1)) + ntohs(pt->tag_len));
|
|
|
|
if(ptn > end)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
switch (pt->tag_type) {
|
|
|
|
case PTT_RELAY_SID:
|
|
|
|
insert_tag(sp, pt);
|
|
|
|
break;
|
|
|
|
case PTT_EOL:
|
|
|
|
return NULL;
|
|
|
|
case PTT_SRV_NAME:
|
|
|
|
case PTT_AC_NAME:
|
|
|
|
case PTT_HOST_UNIQ:
|
|
|
|
case PTT_AC_COOKIE:
|
|
|
|
case PTT_VENDOR:
|
|
|
|
case PTT_SRV_ERR:
|
|
|
|
case PTT_SYS_ERR:
|
|
|
|
case PTT_GEN_ERR:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
pt = (struct pppoe_tag*)ptn;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
1999-10-23 04:28:11 +00:00
|
|
|
static int
|
|
|
|
pppoe_send_event(sessp sp, enum cmd cmdid)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
struct ng_mesg *msg;
|
1999-10-27 11:29:51 +00:00
|
|
|
struct ngpppoe_sts *sts;
|
1999-10-23 04:28:11 +00:00
|
|
|
|
1999-10-23 15:15:42 +00:00
|
|
|
AAA
|
1999-10-23 04:28:11 +00:00
|
|
|
NG_MKMESSAGE(msg, NGM_PPPOE_COOKIE, cmdid,
|
1999-10-27 11:29:51 +00:00
|
|
|
sizeof(struct ngpppoe_sts), M_NOWAIT);
|
|
|
|
sts = (struct ngpppoe_sts *)msg->data;
|
1999-10-23 04:28:11 +00:00
|
|
|
strncpy(sts->hook, sp->hook->name, NG_HOOKLEN + 1);
|
|
|
|
error = ng_send_msg(sp->hook->node, msg, sp->creator, NULL);
|
|
|
|
return (error);
|
|
|
|
}
|