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o Introduce D-Link compat mode, that is default to off and can be set

Browse Source 
by NGM_PPPOE_SETMODE message. When D-Link compat mode is on, we will
  broadcast PADI with empty Service-Name to all listening hooks.
o Rewrite the compatibility options. Before we had two modes - standard
  and non-standard (aka 3Com). Now we have standard mode and two compat
  flags, that can be combined.
o Be consistent and do s/STUPID/3COM/g. I don't say that 3Com mode isn't
  stupid, just want to make code easier to read.
This commit is contained in:
Gleb Smirnoff 2006-01-27 10:56:22 +00:00
parent 7ea60cedb5
commit 1c8aa594a8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=154901
2 changed files with 87 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

139
sys/netgraph/ng_pppoe.c
View File

@ -228,17 +228,6 @@ 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 {
uint8_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},
@ -247,13 +236,7 @@ static const struct ether_header eh_standard =
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},
};
ETHERTYPE_PPPOE_3COM_DISC};
/*
* Information we store for each node
@ -265,7 +248,9 @@ struct PPPoE {
u_int packets_in; /* packets in from ethernet */
u_int packets_out; /* packets out towards ethernet */
uint32_t flags;
const struct ng_pppoe_mode_t *mode; /* standard PPPoE or 3Com? */
#define COMPAT_3COM 0x00000001
#define COMPAT_DLINK 0x00000002
const struct ether_header *eh; /* standard PPPoE or 3Com? */
};
typedef struct PPPoE *priv_p;
@ -647,8 +632,8 @@ ng_pppoe_constructor(node_p node)
NG_NODE_SET_PRIVATE(node, privp);
privp->node = node;
/* Initialize to standard mode (the first one in ng_pppoe_modes[]). */
privp->mode = &ng_pppoe_modes[0];
/* Initialize to standard mode. */
privp->eh = &eh_standard;
CTR3(KTR_NET, "%20s: created node [%x] (%p)",
__func__, node->nd_ID, node);
@ -806,7 +791,7 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
neg->m->m_len = sizeof(struct pppoe_full_hdr);
neg->pkt = mtod(neg->m, union packet*);
memcpy((void *)&neg->pkt->pkt_header.eh,
(const void *)privp->mode->eh_prototype,
(const void *)privp->eh,
sizeof(struct ether_header));
neg->pkt->pkt_header.ph.ver = 0x1;
neg->pkt->pkt_header.ph.type = 0x1;
@ -912,7 +897,6 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
break;
case NGM_PPPOE_SETMODE:
{
const struct ng_pppoe_mode_t *mode;
char *s;
size_t len;
@ -923,25 +907,61 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
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);
if (len == strlen(NG_PPPOE_STANDARD) &&
(strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
privp->flags = 0;
privp->eh = &eh_standard;
break;
}
if (len == strlen(NG_PPPOE_3COM) &&
(strncmp(NG_PPPOE_3COM, s, len) == 0)) {
privp->flags |= COMPAT_3COM;
privp->eh = &eh_3Com;
break;
}
if (len == strlen(NG_PPPOE_DLINK) &&
(strncmp(NG_PPPOE_DLINK, s, len) == 0)) {
privp->flags |= COMPAT_DLINK;
break;
}
error = EINVAL;
break;
}
case NGM_PPPOE_GETMODE:
NG_MKRESPONSE(resp, msg, strlen(privp->mode->name) + 1,
M_NOWAIT);
{
char *s;
size_t len = 0;
if (privp->flags == 0)
len += strlen(NG_PPPOE_STANDARD) + 1;
if (privp->flags & COMPAT_3COM)
len += strlen(NG_PPPOE_3COM) + 1;
if (privp->flags & COMPAT_DLINK)
len += strlen(NG_PPPOE_DLINK) + 1;
NG_MKRESPONSE(resp, msg, len, M_NOWAIT);
if (resp == NULL)
LEAVE(ENOMEM);
strlcpy((char *)resp->data, privp->mode->name,
strlen(privp->mode->name) + 1);
s = (char *)resp->data;
if (privp->flags == 0) {
len = strlen(NG_PPPOE_STANDARD);
strlcpy(s, NG_PPPOE_STANDARD, len + 1);
break;
}
if (privp->flags & COMPAT_3COM) {
len = strlen(NG_PPPOE_3COM);
strlcpy(s, NG_PPPOE_3COM, len + 1);
s += len;
}
if (privp->flags & COMPAT_DLINK) {
if (s != resp->data)
*s++ = '|';
len = strlen(NG_PPPOE_DLINK);
strlcpy(s, NG_PPPOE_DLINK, len + 1);
}
break;
}
default:
LEAVE(EINVAL);
}
@ -950,10 +970,9 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
LEAVE(EINVAL);
}
CTR2(KTR_NET, "%20s: returning %d", __func__, error);
/* Take care of synchronous response, if any. */
quit:
CTR2(KTR_NET, "%20s: returning %d", __func__, error);
NG_RESPOND_MSG(error, node, item, resp);
/* Free the message and return. */
NG_FREE_MSG(msg);
@ -984,8 +1003,7 @@ pppoe_start(sessp sp)
* mode use configured ethertype.
*/
memcpy((void *)&sp->neg->pkt->pkt_header.eh,
(const void *)privp->mode->eh_prototype,
sizeof(struct ether_header));
(const void *)privp->eh, 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));
@ -1094,7 +1112,7 @@ ng_pppoe_rcvdata(hook_p hook, item_p item)
wh = mtod(m, struct pppoe_full_hdr *);
length = ntohs(wh->ph.length);
switch(wh->eh.ether_type) {
case ETHERTYPE_PPPOE_STUPID_DISC: /* fall through */
case ETHERTYPE_PPPOE_3COM_DISC: /* fall through */
case ETHERTYPE_PPPOE_DISC:
/*
* We need to try to make sure that the tag area
@ -1158,19 +1176,22 @@ ng_pppoe_rcvdata(hook_p hook, item_p item)
}
/*
* If Service-Name is NULL, we broadcast
* the PADI to all listening hooks, otherwise
* we seek for a matching one.
* First, try to match Service-Name
* against our listening hooks. If
* no success and we are in D-Link
* compat mode and Service-Name is
* empty, then we broadcast the PADI
* to all listening hooks.
*/
if (ntohs(tag->tag_len) != 0) {
sendhook = pppoe_match_svc(node, tag);
if (sendhook != NULL)
NG_FWD_NEW_DATA(error, item,
sendhook, m);
else
error = ENETUNREACH;
} else
sendhook = pppoe_match_svc(node, tag);
if (sendhook != NULL)
NG_FWD_NEW_DATA(error, item,
sendhook, m);
else if (privp->flags & COMPAT_DLINK &&
ntohs(tag->tag_len) == 0)
error = pppoe_broadcast_padi(node, m);
else
error = ENETUNREACH;
break;
case PADO_CODE:
/*
@ -1304,9 +1325,9 @@ ng_pppoe_rcvdata(hook_p hook, item_p item)
/* Configure ethertype depending on what
* ethertype was used at discovery phase */
if (sp->pkt_hdr.eh.ether_type ==
ETHERTYPE_PPPOE_STUPID_DISC)
ETHERTYPE_PPPOE_3COM_DISC)
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_STUPID_SESS;
= ETHERTYPE_PPPOE_3COM_SESS;
else
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_SESS;
@ -1355,9 +1376,9 @@ ng_pppoe_rcvdata(hook_p hook, item_p item)
* Keep a copy of the header we will be using.
*/
sp->pkt_hdr = neg->pkt->pkt_header;
if (privp->mode->id == PPPOE_NONSTANDARD)
if (privp->flags & COMPAT_3COM)
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_STUPID_SESS;
= ETHERTYPE_PPPOE_3COM_SESS;
else
sp->pkt_hdr.eh.ether_type
= ETHERTYPE_PPPOE_SESS;
@ -1389,7 +1410,7 @@ ng_pppoe_rcvdata(hook_p hook, item_p item)
LEAVE(EPFNOSUPPORT);
}
break;
case ETHERTYPE_PPPOE_STUPID_SESS:
case ETHERTYPE_PPPOE_3COM_SESS:
case ETHERTYPE_PPPOE_SESS:
/*
* Find matching peer/session combination.
@ -1627,8 +1648,8 @@ ng_pppoe_disconnect(hook_p hook)
* during sessions stage.
*/
if (sp->pkt_hdr.eh.ether_type ==
ETHERTYPE_PPPOE_STUPID_SESS)
wh->eh.ether_type = ETHERTYPE_PPPOE_STUPID_DISC;
ETHERTYPE_PPPOE_3COM_SESS)
wh->eh.ether_type = ETHERTYPE_PPPOE_3COM_DISC;
else
wh->eh.ether_type = ETHERTYPE_PPPOE_DISC;

12
sys/netgraph/ng_pppoe.h
View File

@ -65,7 +65,9 @@
/* Mode names */
#define NG_PPPOE_STANDARD "standard"
#define NG_PPPOE_NONSTANDARD "3Com"
#define NG_PPPOE_3COM "3Com"
#define NG_PPPOE_NONSTANDARD NG_PPPOE_3COM
#define NG_PPPOE_DLINK "D-Link"
/**********************************************************************
* Netgraph commands understood by this node type.
@ -180,8 +182,8 @@ struct ngpppoe_sts {
#define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */
#define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */
#define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
#define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets 3com? */
#define ETHERTYPE_PPPOE_3COM_DISC 0x3c12 /* pppoe discovery packets 3com? */
#define ETHERTYPE_PPPOE_3COM_SESS 0x3c13 /* pppoe session packets 3com? */
#else
#define PTT_EOL (0x0000)
#define PTT_SRV_NAME (0x0101)
@ -196,8 +198,8 @@ struct ngpppoe_sts {
#define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */
#define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */
#define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
#define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets 3com? */
#define ETHERTYPE_PPPOE_3COM_DISC 0x123c /* pppoe discovery packets 3com? */
#define ETHERTYPE_PPPOE_3COM_SESS 0x133c /* pppoe session packets 3com? */
#endif
struct pppoe_tag {