Fix ng_pppoe(4) after turning off "autosrc feature" on ng_ether(4).
- Store the Ethernet header in node softc. - Initialize header with dst addr and ethertype in node constructor method. - In node connect method send NGM_ETHER_GET_ENADDR message downwards. - If received reply from ng_ether(4) store the src addr in softc. - Add NGM_PPPOE_SETENDADDR message that allows user to override the address with whatever he/she wants.
This commit is contained in:
Gleb Smirnoff
parent
de6f1c7c6c
commit
b1ba28df1d
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=161117
@ -35,7 +35,7 @@
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.\" $FreeBSD$
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.\" $Whistle: ng_pppoe.8,v 1.1 1999/01/25 23:46:27 archie Exp $
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.\"
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.Dd January 27, 2006
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.Dd August 9, 2006
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.Dt NG_PPPOE 4
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.Os
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.Sh NAME
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@ -70,7 +70,14 @@ This node type supports the following hooks:
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.Pp
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.Bl -tag -width [unspecified]
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.It Dv ethernet
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The hook that should normally be connected to an Ethernet node.
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The hook that should normally be connected to an
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.Xr ng_ether 4
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node.
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Once connected,
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.Nm
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will send a message down this hook to determine Ethernet address of
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the underlying node.
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Obtained address will be stored and then used for outgoing datagrams.
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.It Dv debug
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Presently no use.
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.It Dv [unspecified]
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@ -227,6 +234,15 @@ the next session in the proprietary 3Com mode:
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.Bd -literal -offset indent
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ngctl msg fxp0:orphans pppoe_setmode '"3Com"'
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.Ed
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.It Dv NGM_PPPOE_SETENADDR
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Set the node Ethernet address for outgoing datagrams.
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This message is important when node failed to obtain Ethernet address
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from peer on
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.Dv ethernet
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hook, or when user wants to override this address with another one.
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.Tn ASCII
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form of this message is
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.Qq Li setenaddr .
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.El
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.Sh SHUTDOWN
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This node shuts down upon receipt of a
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@ -466,6 +482,7 @@ setup(char *ethername, char *service, char *sessname,
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.Sh SEE ALSO
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.Xr netgraph 3 ,
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.Xr netgraph 4 ,
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.Xr ng_ether 4 ,
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.Xr ng_ppp 4 ,
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.Xr ng_socket 4 ,
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.Xr ngctl 8 ,
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@ -55,6 +55,7 @@
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#include <netgraph/netgraph.h>
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#include <netgraph/ng_parse.h>
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#include <netgraph/ng_pppoe.h>
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#include <netgraph/ng_ether.h>
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#ifdef NG_SEPARATE_MALLOC
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MALLOC_DEFINE(M_NETGRAPH_PPPOE, "netgraph_pppoe", "netgraph pppoe node");
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@ -74,6 +75,7 @@ static ng_constructor_t ng_pppoe_constructor;
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static ng_rcvmsg_t ng_pppoe_rcvmsg;
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static ng_shutdown_t ng_pppoe_shutdown;
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static ng_newhook_t ng_pppoe_newhook;
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static ng_connect_t ng_pppoe_connect;
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static ng_rcvdata_t ng_pppoe_rcvdata;
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static ng_disconnect_t ng_pppoe_disconnect;
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@ -158,6 +160,13 @@ static const struct ng_cmdlist ng_pppoe_cmds[] = {
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NULL,
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&ng_parse_string_type
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},
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{
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NGM_PPPOE_COOKIE,
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NGM_PPPOE_SETENADDR,
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"setenaddr",
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&ng_parse_enaddr_type,
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NULL
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},
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{ 0 }
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};
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@ -169,6 +178,7 @@ static struct ng_type typestruct = {
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.rcvmsg = ng_pppoe_rcvmsg,
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.shutdown = ng_pppoe_shutdown,
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.newhook = ng_pppoe_newhook,
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.connect = ng_pppoe_connect,
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.rcvdata = ng_pppoe_rcvdata,
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.disconnect = ng_pppoe_disconnect,
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.cmdlist = ng_pppoe_cmds,
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@ -229,16 +239,6 @@ typedef struct sess_con *sessp;
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#define NG_PPPOE_SESSION_NODE(sp) NG_HOOK_NODE(sp->hook)
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static const struct ether_header eh_standard =
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{{0xff,0xff,0xff,0xff,0xff,0xff},
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{0x00,0x00,0x00,0x00,0x00,0x00},
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ETHERTYPE_PPPOE_DISC};
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static const struct ether_header eh_3Com =
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{{0xff,0xff,0xff,0xff,0xff,0xff},
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{0x00,0x00,0x00,0x00,0x00,0x00},
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ETHERTYPE_PPPOE_3COM_DISC};
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/*
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* Information we store for each node
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*/
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@ -251,7 +251,7 @@ struct PPPoE {
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uint32_t flags;
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#define COMPAT_3COM 0x00000001
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#define COMPAT_DLINK 0x00000002
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const struct ether_header *eh; /* standard PPPoE or 3Com? */
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struct ether_header eh;
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};
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typedef struct PPPoE *priv_p;
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@ -635,7 +635,8 @@ ng_pppoe_constructor(node_p node)
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privp->node = node;
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/* Initialize to standard mode. */
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privp->eh = &eh_standard;
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memset(&privp->eh.ether_dhost, 0xff, ETHER_ADDR_LEN);
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privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
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CTR3(KTR_NET, "%20s: created node [%x] (%p)",
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__func__, node->nd_ID, node);
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@ -683,6 +684,38 @@ ng_pppoe_newhook(node_p node, hook_p hook, const char *name)
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return(0);
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}
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/*
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* Hook has been added successfully. Request the MAC address of
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* the underlying Ethernet node.
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*/
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static int
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ng_pppoe_connect(hook_p hook)
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{
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const priv_p privp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
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struct ng_mesg *msg;
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int error = 0;
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if (hook != privp->ethernet_hook)
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return (0);
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/*
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* If this is Ethernet hook, then request MAC address
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* from our downstream.
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*/
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NG_MKMESSAGE(msg, NGM_ETHER_COOKIE, NGM_ETHER_GET_ENADDR, 0, M_NOWAIT);
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if (msg == NULL)
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return (ENOBUFS);
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/*
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* Our hook and peer hook have HK_INVALID flag set,
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* so we can't use NG_SEND_MSG_HOOK() macro here.
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*/
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NG_SEND_MSG_ID(error, privp->node, msg,
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NG_NODE_ID(NG_PEER_NODE(privp->ethernet_hook)),
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NG_NODE_ID(privp->node));
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return (error);
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}
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/*
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* Get a netgraph control message.
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* Check it is one we understand. If needed, send a response.
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@ -797,8 +830,7 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
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neg->m->m_len = sizeof(struct pppoe_full_hdr);
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neg->pkt = mtod(neg->m, union packet*);
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memcpy((void *)&neg->pkt->pkt_header.eh,
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(const void *)privp->eh,
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sizeof(struct ether_header));
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&privp->eh, sizeof(struct ether_header));
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neg->pkt->pkt_header.ph.ver = 0x1;
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neg->pkt->pkt_header.ph.type = 0x1;
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neg->pkt->pkt_header.ph.sid = 0x0000;
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@ -917,13 +949,14 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
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if (len == strlen(NG_PPPOE_STANDARD) &&
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(strncmp(NG_PPPOE_STANDARD, s, len) == 0)) {
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privp->flags = 0;
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privp->eh = &eh_standard;
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privp->eh.ether_type = ETHERTYPE_PPPOE_DISC;
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break;
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}
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if (len == strlen(NG_PPPOE_3COM) &&
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(strncmp(NG_PPPOE_3COM, s, len) == 0)) {
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privp->flags |= COMPAT_3COM;
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privp->eh = &eh_3Com;
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privp->eh.ether_type =
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ETHERTYPE_PPPOE_3COM_DISC;
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break;
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}
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if (len == strlen(NG_PPPOE_DLINK) &&
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@ -969,10 +1002,30 @@ ng_pppoe_rcvmsg(node_p node, item_p item, hook_p lasthook)
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}
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break;
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}
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case NGM_PPPOE_SETENADDR:
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if (msg->header.arglen != ETHER_ADDR_LEN)
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LEAVE(EINVAL);
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bcopy(msg->data, &privp->eh.ether_shost,
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ETHER_ADDR_LEN);
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break;
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default:
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LEAVE(EINVAL);
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}
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break;
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case NGM_ETHER_COOKIE:
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if (!(msg->header.flags & NGF_RESP))
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LEAVE(EINVAL);
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switch (msg->header.cmd) {
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case NGM_ETHER_GET_ENADDR:
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if (msg->header.arglen != ETHER_ADDR_LEN)
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LEAVE(EINVAL);
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bcopy(msg->data, &privp->eh.ether_shost,
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ETHER_ADDR_LEN);
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break;
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default:
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error = EINVAL;
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}
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break;
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default:
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LEAVE(EINVAL);
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}
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@ -1006,11 +1059,10 @@ pppoe_start(sessp sp)
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sp->state = PPPOE_SINIT;
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/*
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* Reset the packet header to broadcast. Since we are
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* in a client
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* mode use configured ethertype.
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* in a client mode use configured ethertype.
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*/
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memcpy((void *)&sp->neg->pkt->pkt_header.eh,
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(const void *)privp->eh, sizeof(struct ether_header));
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memcpy((void *)&sp->neg->pkt->pkt_header.eh, &privp->eh,
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sizeof(struct ether_header));
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sp->neg->pkt->pkt_header.ph.code = PADI_CODE;
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uniqtag.hdr.tag_type = PTT_HOST_UNIQ;
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uniqtag.hdr.tag_len = htons((u_int16_t)sizeof(uniqtag.data));
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@ -85,8 +85,9 @@ enum cmd {
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NGM_PPPOE_ACNAME = 9, /* AC_NAME for informational purposes */
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NGM_PPPOE_GET_STATUS = 10, /* data in/out */
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NGM_PPPOE_SESSIONID = 11, /* Session_ID for informational purposes */
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NGM_PPPOE_SETMODE = 12, /* set to standard or 3Com mode */
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NGM_PPPOE_SETMODE = 12, /* set to standard or compat modes */
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NGM_PPPOE_GETMODE = 13, /* see current mode */
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NGM_PPPOE_SETENADDR = 14, /* set Ethernet address */
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};
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/***********************
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