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sctp: add SCTP_AUTH_NO_AUTH type for AUTHENTICATION_EVENT

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This patch is to add SCTP_AUTH_NO_AUTH type for AUTHENTICATION_EVENT,
as described in section 6.1.8 of RFC6458.

      SCTP_AUTH_NO_AUTH:  This report indicates that the peer does not
         support SCTP authentication as defined in [RFC4895].

Note that the implementation is quite similar as that of
SCTP_ADAPTATION_INDICATION.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2018-03-14 19:05:34 +08:00 committed by David S. Miller
parent ec2e506c68
commit 30f6ebf65b
4 changed files with 56 additions and 2 deletions
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1
include/net/sctp/command.h
View file

@ -100,6 +100,7 @@ enum sctp_verb {
SCTP_CMD_SET_SK_ERR, /* Set sk_err */
SCTP_CMD_ASSOC_CHANGE, /* generate and send assoc_change event */
SCTP_CMD_ADAPTATION_IND, /* generate and send adaptation event */
SCTP_CMD_PEER_NO_AUTH, /* generate and send authentication event */
SCTP_CMD_ASSOC_SHKEY, /* generate the association shared keys */
SCTP_CMD_T1_RETRAN, /* Mark for retransmission after T1 timeout */
SCTP_CMD_UPDATE_INITTAG, /* Update peer inittag */

1
include/uapi/linux/sctp.h
View file

@ -522,6 +522,7 @@ enum {
SCTP_AUTH_NEW_KEY,
#define SCTP_AUTH_NEWKEY SCTP_AUTH_NEW_KEY /* compatible with before */
SCTP_AUTH_FREE_KEY,
SCTP_AUTH_NO_AUTH,
};
/*

13
net/sctp/sm_sideeffect.c
View file

@ -1049,6 +1049,16 @@ static void sctp_cmd_assoc_change(struct sctp_cmd_seq *commands,
asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
}
static void sctp_cmd_peer_no_auth(struct sctp_cmd_seq *commands,
struct sctp_association *asoc)
{
struct sctp_ulpevent *ev;
ev = sctp_ulpevent_make_authkey(asoc, 0, SCTP_AUTH_NO_AUTH, GFP_ATOMIC);
if (ev)
asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
}
/* Helper function to generate an adaptation indication event */
static void sctp_cmd_adaptation_ind(struct sctp_cmd_seq *commands,
struct sctp_association *asoc)
@ -1755,6 +1765,9 @@ static int sctp_cmd_interpreter(enum sctp_event event_type,
case SCTP_CMD_ADAPTATION_IND:
sctp_cmd_adaptation_ind(commands, asoc);
break;
case SCTP_CMD_PEER_NO_AUTH:
sctp_cmd_peer_no_auth(commands, asoc);
break;
case SCTP_CMD_ASSOC_SHKEY:
error = sctp_auth_asoc_init_active_key(asoc,

43
net/sctp/sm_statefuns.c
View file

@ -659,7 +659,7 @@ enum sctp_disposition sctp_sf_do_5_1D_ce(struct net *net,
void *arg,
struct sctp_cmd_seq *commands)
{
struct sctp_ulpevent *ev, *ai_ev = NULL;
struct sctp_ulpevent *ev, *ai_ev = NULL, *auth_ev = NULL;
struct sctp_association *new_asoc;
struct sctp_init_chunk *peer_init;
struct sctp_chunk *chunk = arg;
@ -820,6 +820,14 @@ enum sctp_disposition sctp_sf_do_5_1D_ce(struct net *net,
goto nomem_aiev;
}
if (!new_asoc->peer.auth_capable) {
auth_ev = sctp_ulpevent_make_authkey(new_asoc, 0,
SCTP_AUTH_NO_AUTH,
GFP_ATOMIC);
if (!auth_ev)
goto nomem_authev;
}
/* Add all the state machine commands now since we've created
* everything. This way we don't introduce memory corruptions
* during side-effect processing and correclty count established
@ -847,8 +855,14 @@ enum sctp_disposition sctp_sf_do_5_1D_ce(struct net *net,
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(ai_ev));
if (auth_ev)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(auth_ev));
return SCTP_DISPOSITION_CONSUME;
nomem_authev:
sctp_ulpevent_free(ai_ev);
nomem_aiev:
sctp_ulpevent_free(ev);
nomem_ev:
@ -953,6 +967,15 @@ enum sctp_disposition sctp_sf_do_5_1E_ca(struct net *net,
SCTP_ULPEVENT(ev));
}
if (!asoc->peer.auth_capable) {
ev = sctp_ulpevent_make_authkey(asoc, 0, SCTP_AUTH_NO_AUTH,
GFP_ATOMIC);
if (!ev)
goto nomem;
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(ev));
}
return SCTP_DISPOSITION_CONSUME;
nomem:
return SCTP_DISPOSITION_NOMEM;
@ -1908,6 +1931,9 @@ static enum sctp_disposition sctp_sf_do_dupcook_b(
if (asoc->peer.adaptation_ind)
sctp_add_cmd_sf(commands, SCTP_CMD_ADAPTATION_IND, SCTP_NULL());
if (!asoc->peer.auth_capable)
sctp_add_cmd_sf(commands, SCTP_CMD_PEER_NO_AUTH, SCTP_NULL());
return SCTP_DISPOSITION_CONSUME;
nomem:
@ -1954,7 +1980,7 @@ static enum sctp_disposition sctp_sf_do_dupcook_d(
struct sctp_cmd_seq *commands,
struct sctp_association *new_asoc)
{
struct sctp_ulpevent *ev = NULL, *ai_ev = NULL;
struct sctp_ulpevent *ev = NULL, *ai_ev = NULL, *auth_ev = NULL;
struct sctp_chunk *repl;
/* Clarification from Implementor's Guide:
@ -2001,6 +2027,14 @@ static enum sctp_disposition sctp_sf_do_dupcook_d(
goto nomem;
}
if (!asoc->peer.auth_capable) {
auth_ev = sctp_ulpevent_make_authkey(asoc, 0,
SCTP_AUTH_NO_AUTH,
GFP_ATOMIC);
if (!auth_ev)
goto nomem;
}
}
repl = sctp_make_cookie_ack(new_asoc, chunk);
@ -2015,10 +2049,15 @@ static enum sctp_disposition sctp_sf_do_dupcook_d(
if (ai_ev)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(ai_ev));
if (auth_ev)
sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
SCTP_ULPEVENT(auth_ev));
return SCTP_DISPOSITION_CONSUME;
nomem:
if (auth_ev)
sctp_ulpevent_free(auth_ev);
if (ai_ev)
sctp_ulpevent_free(ai_ev);
if (ev)