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When node is server serve both standard RFC2516 and non-standard 3Com

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clients simultaneously. When node is client its mode is configured
with a control message.

sysctl net.graph.nonstandard_pppoe is deprecated but kept for
backward compatibility for some time.

Approved by:	julian
This commit is contained in:
Gleb Smirnoff 2004-07-27 19:47:13 +00:00
parent 76e8a01fc9
commit fdc755d162
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132703
2 changed files with 119 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

153
sys/netgraph/ng_pppoe.c
View File

@ -151,6 +151,20 @@ static const struct ng_cmdlist ng_pppoe_cmds[] = {
&ng_pppoe_sts_state_type,
NULL
},
{
NGM_PPPOE_COOKIE,
NGM_PPPOE_SETMODE,
"pppoe_setmode",
&ng_parse_string_type,
NULL
},
{
NGM_PPPOE_COOKIE,
NGM_PPPOE_GETMODE,
"pppoe_getmode",
NULL,
&ng_parse_string_type
},
{ 0 }
};
@ -224,6 +238,35 @@ struct sess_con {
};
typedef struct sess_con *sessp;
#define NG_PPPOE_SESSION_NODE(sp) NG_HOOK_NODE(sp->hook)
enum {
PPPOE_STANDARD = 1, /* standard RFC2516 mode */
PPPOE_NONSTANDARD, /* 3Com proprietary mode */
};
struct ng_pppoe_mode_t {
u_int8_t id;
const struct ether_header *eh_prototype;
const char *name;
};
static const struct ether_header eh_standard =
{{0xff,0xff,0xff,0xff,0xff,0xff},
{0x00,0x00,0x00,0x00,0x00,0x00},
ETHERTYPE_PPPOE_DISC};
static const struct ether_header eh_3Com =
{{0xff,0xff,0xff,0xff,0xff,0xff},
{0x00,0x00,0x00,0x00,0x00,0x00},
ETHERTYPE_PPPOE_STUPID_DISC};
static const struct ng_pppoe_mode_t ng_pppoe_modes[] = {
{ PPPOE_STANDARD, &eh_standard, NG_PPPOE_STANDARD },
{ PPPOE_NONSTANDARD, &eh_3Com, NG_PPPOE_NONSTANDARD },
{ 0, NULL},
};
/*
* Information we store for each node
*/
@ -234,23 +277,17 @@ struct PPPOE {
u_int packets_in; /* packets in from ethernet */
u_int packets_out; /* packets out towards ethernet */
u_int32_t flags;
const struct ng_pppoe_mode_t *mode; /* standard PPPoE or 3Com? */
/*struct sess_con *buckets[HASH_SIZE];*/ /* not yet used */
};
typedef struct PPPOE *priv_p;
/*
* XXXRW: Leave this unsynchronized, since only a single field is modified,
* and it's done so infrequently. Likewise, pppoe_mode.
*/
struct ether_header eh_prototype =
{{0xff,0xff,0xff,0xff,0xff,0xff},
{0x00,0x00,0x00,0x00,0x00,0x00},
ETHERTYPE_PPPOE_DISC};
#define PPPOE_KEEPSTANDARD -1 /* never switch to nonstandard mode */
#define PPPOE_STANDARD 0 /* try standard mode (dangerous!) */
#define PPPOE_NONSTANDARD 1 /* just be in nonstandard mode */
/* Deprecated sysctl, leaved here to keep compatibility for some time */
#define PPPOE_KEEPSTANDARD -1
#define PPPOE_STANDARD 0
#define PPPOE_NONSTANDARD 1
static int pppoe_mode = PPPOE_KEEPSTANDARD;
static const struct ng_pppoe_mode_t *sysctl_mode = ng_pppoe_modes;
static int
ngpppoe_set_ethertype(SYSCTL_HANDLER_ARGS)
@ -264,20 +301,18 @@ ngpppoe_set_ethertype(SYSCTL_HANDLER_ARGS)
return (error);
switch (val) {
case PPPOE_NONSTANDARD:
pppoe_mode = PPPOE_NONSTANDARD;
eh_prototype.ether_type = ETHERTYPE_PPPOE_STUPID_DISC;
sysctl_mode = ng_pppoe_modes + 1;
break;
case PPPOE_STANDARD:
pppoe_mode = PPPOE_STANDARD;
eh_prototype.ether_type = ETHERTYPE_PPPOE_DISC;
break;
case PPPOE_KEEPSTANDARD:
pppoe_mode = PPPOE_KEEPSTANDARD;
eh_prototype.ether_type = ETHERTYPE_PPPOE_DISC;
sysctl_mode = ng_pppoe_modes;
break;
default:
return (EINVAL);
}
pppoe_mode = val;
printf("net.graph.nonstandard_pppoe is deprecated. See ng_pppoe(4), ppp(8).\n");
return (0);
}
@ -600,6 +635,10 @@ AAA
/* Link structs together; this counts as our one reference to *nodep */
NG_NODE_SET_PRIVATE(node, privdata);
privdata->node = node;
/* Initialize to standard mode (the first one in ng_pppoe_modes[]). */
privdata->mode = sysctl_mode;
return (0);
}
@ -757,7 +796,9 @@ AAA
callout_handle_init( &neg->timeout_handle);
neg->m->m_len = sizeof(struct pppoe_full_hdr);
neg->pkt = mtod(neg->m, union packet*);
neg->pkt->pkt_header.eh = eh_prototype;
memcpy((void *)&neg->pkt->pkt_header.eh,
(const void *)privp->mode->eh_prototype,
sizeof(struct ether_header));
neg->pkt->pkt_header.ph.ver = 0x1;
neg->pkt->pkt_header.ph.type = 0x1;
neg->pkt->pkt_header.ph.sid = 0x0000;
@ -860,6 +901,38 @@ AAA
ourmsg->data_len);
neg->service_len = ourmsg->data_len;
break;
case NGM_PPPOE_SETMODE:
{
const struct ng_pppoe_mode_t *mode;
char *s;
size_t len;
if (msg->header.arglen == 0)
LEAVE(EINVAL);
s = (char *)msg->data;
len = msg->header.arglen - 1;
/* Search for matching mode string */
for (mode = ng_pppoe_modes; mode->id != 0; mode++ )
if ((strlen(mode->name) == len) &&
!strncmp(mode->name, s, len))
break; /* found */
if (mode->id != 0)
privp->mode = mode;
else
LEAVE(EINVAL);
break;
}
case NGM_PPPOE_GETMODE:
NG_MKRESPONSE(resp, msg, strlen(privp->mode->name) + 1,
M_NOWAIT);
if (resp == NULL)
LEAVE(ENOMEM);
strlcpy((char *)resp->data, privp->mode->name,
strlen(privp->mode->name) + 1);
break;
default:
LEAVE(EINVAL);
}
@ -883,6 +956,7 @@ AAA
static void
pppoe_start(sessp sp)
{
priv_p privp = NG_NODE_PRIVATE(NG_PPPOE_SESSION_NODE(sp));
struct {
struct pppoe_tag hdr;
union uniq data;
@ -893,8 +967,11 @@ pppoe_start(sessp sp)
*/
AAA
sp->state = PPPOE_SINIT;
/* reset the packet header to broadcast */
sp->neg->pkt->pkt_header.eh = eh_prototype;
/* Reset the packet header to broadcast. Since we are in a client
* mode use configured ethertype. */
memcpy((void *)&sp->neg->pkt->pkt_header.eh,
(const void *)privp->mode->eh_prototype,
sizeof(struct ether_header));
sp->neg->pkt->pkt_header.ph.code = PADI_CODE;
uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
@ -997,23 +1074,7 @@ AAA
wh = mtod(m, struct pppoe_full_hdr *);
length = ntohs(wh->ph.length);
switch(wh->eh.ether_type) {
case ETHERTYPE_PPPOE_STUPID_DISC:
if (pppoe_mode == PPPOE_STANDARD) {
pppoe_mode = PPPOE_NONSTANDARD;
eh_prototype.ether_type =
ETHERTYPE_PPPOE_STUPID_DISC;
log(LOG_NOTICE,
"Switched to nonstandard PPPoE mode due to "
"packet from %*D\n",
ETHER_ADDR_LEN,
wh->eh.ether_shost, ":");
} else if (pppoe_mode == PPPOE_KEEPSTANDARD)
log(LOG_NOTICE,
"Ignored nonstandard PPPoE packet "
"from %*D\n",
ETHER_ADDR_LEN,
wh->eh.ether_shost, ":");
/* fall through */
case ETHERTYPE_PPPOE_STUPID_DISC: /* fall through */
case ETHERTYPE_PPPOE_DISC:
/*
* We need to try to make sure that the tag area
@ -1214,7 +1275,10 @@ AAA
* from NEWCONNECTED to CONNECTED
*/
sp->pkt_hdr = neg->pkt->pkt_header;
if (pppoe_mode == PPPOE_NONSTANDARD)
/* Configure ethertype depending on what
* ethertype was used at discovery phase */
if (sp->pkt_hdr.eh.ether_type ==
ETHERTYPE_PPPOE_STUPID_DISC)
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_STUPID_SESS;
else
@ -1266,7 +1330,7 @@ AAA
* Keep a copy of the header we will be using.
*/
sp->pkt_hdr = neg->pkt->pkt_header;
if (pppoe_mode == PPPOE_NONSTANDARD)
if (privp->mode->id == PPPOE_NONSTANDARD)
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_STUPID_SESS;
else
@ -1407,6 +1471,8 @@ AAA
session = ntohs(wh->ph.sid);
length = ntohs(wh->ph.length);
code = wh->ph.code;
/* Use peers mode in session */
neg->pkt->pkt_header.eh.ether_type = wh->eh.ether_type;
if ( code != PADI_CODE) {
LEAVE(EINVAL);
};
@ -1548,7 +1614,10 @@ AAA
/* revert the stored header to DISC/PADT mode */
wh = &sp->pkt_hdr;
wh->ph.code = PADT_CODE;
if (pppoe_mode == PPPOE_NONSTANDARD)
/* Configure ethertype depending on what was used during
* sessions stage. */
if (sp->pkt_hdr.eh.ether_type ==
ETHERTYPE_PPPOE_STUPID_SESS)
wh->eh.ether_type = ETHERTYPE_PPPOE_STUPID_DISC;
else
wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;

10
sys/netgraph/ng_pppoe.h
View File

@ -49,7 +49,7 @@
/* Node type name. This should be unique among all netgraph node types */
#define NG_PPPOE_NODE_TYPE "pppoe"
#define NGM_PPPOE_COOKIE 939032003
#define NGM_PPPOE_COOKIE 1089893072
/* Number of active sessions we can handle */
#define PPPOE_NUM_SESSIONS 16 /* for now */
@ -62,6 +62,10 @@
#define NG_PPPOE_HOOK_C_LEADIN "client" /* Connect message starts this */
#define NG_PPPOE_HOOK_DEBUG "debug"
/* Mode names */
#define NG_PPPOE_STANDARD "standard"
#define NG_PPPOE_NONSTANDARD "3Com"
/**********************************************************************
* Netgraph commands understood by this node type.
* FAIL, SUCCESS, CLOSE and ACNAME are sent by the node rather than received.
@ -77,7 +81,9 @@ enum cmd {
NGM_PPPOE_SERVICE = 8, /* additional Service to advertise (in PADO) */
NGM_PPPOE_ACNAME = 9, /* AC_NAME for informational purposes */
NGM_PPPOE_GET_STATUS = 10, /* data in/out */
NGM_PPPOE_SESSIONID = 11 /* Session_ID for informational purposes */
NGM_PPPOE_SESSIONID = 11, /* Session_ID for informational purposes */
NGM_PPPOE_SETMODE = 12, /* set to standard or 3Com mode */
NGM_PPPOE_GETMODE = 13, /* see current mode */
};
/***********************