[SCTP]: Add the handling of "Set Primary IP Address" parameter to INIT

The ADD-IP "Set Primary IP Address" parameter is allowed in the
INIT/INIT-ACK exchange.  Allow processing of this parameter during
the INIT/INIT-ACK.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 96621db..8a0808e 100644 (file)
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -451,6 +451,7 @@ union sctp_params {
        struct sctp_random_param *random;
        struct sctp_chunks_param *chunks;
        struct sctp_hmac_algo_param *hmac_algo;
+       struct sctp_addip_param *addip;
 };
 
 /* RFC 2960.  Section 3.3.5 Heartbeat.

diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 64790b5..8138bbd 100644 (file)
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1969,6 +1969,11 @@ static sctp_ierror_t sctp_verify_param(const struct sctp_association *asoc,
        case SCTP_PARAM_SUPPORTED_EXT:
                break;
 
+       case SCTP_PARAM_SET_PRIMARY:
+               if (sctp_addip_enable)
+                       break;
+               goto fallthrough;
+
        case SCTP_PARAM_HOST_NAME_ADDRESS:
                /* Tell the peer, we won't support this param.  */
                sctp_process_hn_param(asoc, param, chunk, err_chunk);
@@ -2286,6 +2291,8 @@ static int sctp_process_param(struct sctp_association *asoc,
        sctp_scope_t scope;
        time_t stale;
        struct sctp_af *af;
+       union sctp_addr_param *addr_param;
+       struct sctp_transport *t;
 
        /* We maintain all INIT parameters in network byte order all the
         * time.  This allows us to not worry about whether the parameters
@@ -2376,6 +2383,26 @@ static int sctp_process_param(struct sctp_association *asoc,
                asoc->peer.adaptation_ind = param.aind->adaptation_ind;
                break;
 
+       case SCTP_PARAM_SET_PRIMARY:
+               addr_param = param.v + sizeof(sctp_addip_param_t);
+
+               af = sctp_get_af_specific(param_type2af(param.p->type));
+               af->from_addr_param(&addr, addr_param,
+                                   htons(asoc->peer.port), 0);
+
+               /* if the address is invalid, we can't process it.
+                * XXX: see spec for what to do.
+                */
+               if (!af->addr_valid(&addr, NULL, NULL))
+                       break;
+
+               t = sctp_assoc_lookup_paddr(asoc, &addr);
+               if (!t)
+                       break;
+
+               sctp_assoc_set_primary(asoc, t);
+               break;
+
        case SCTP_PARAM_SUPPORTED_EXT:
                sctp_process_ext_param(asoc, param);
                break;