/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/stream.h>
#include <sys/cmn_err.h>
#include <sys/tihdr.h>
#include <sys/kmem.h>
#define _SUN_TPI_VERSION 2
#include <sys/tihdr.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/sctp.h>
#include <inet/common.h>
#include <inet/ipclassifier.h>
#include <inet/ip.h>
#include "sctp_impl.h"
/* ARGSUSED */
static void
sctp_notify(sctp_t *sctp, mblk_t *emp, size_t len)
{
struct T_unitdata_ind *tudi;
mblk_t *mp;
sctp_faddr_t *fp;
int32_t rwnd = 0;
int error;
conn_t *connp = sctp->sctp_connp;
if ((mp = allocb(sizeof (*tudi) + sizeof (void *) +
sizeof (struct sockaddr_in6), BPRI_HI)) == NULL) {
/* XXX trouble: don't want to drop events. should queue it. */
freemsg(emp);
return;
}
dprint(3, ("sctp_notify: event %d\n", (*(uint16_t *)emp->b_rptr)));
mp->b_datap->db_type = M_PROTO;
mp->b_flag |= MSGMARK;
mp->b_rptr += sizeof (void *); /* pointer worth of padding */
tudi = (struct T_unitdata_ind *)mp->b_rptr;
tudi->PRIM_type = T_UNITDATA_IND;
tudi->SRC_offset = sizeof (*tudi);
tudi->OPT_length = 0;
tudi->OPT_offset = 0;
fp = sctp->sctp_primary;
ASSERT(fp);
/*
* Fill in primary remote address.
*/
if (IN6_IS_ADDR_V4MAPPED(&fp->sf_faddr)) {
struct sockaddr_in *sin4;
tudi->SRC_length = sizeof (*sin4);
sin4 = (struct sockaddr_in *)(tudi + 1);
sin4->sin_family = AF_INET;
sin4->sin_port = connp->conn_fport;
IN6_V4MAPPED_TO_IPADDR(&fp->sf_faddr, sin4->sin_addr.s_addr);
mp->b_wptr = (uchar_t *)(sin4 + 1);
} else {
struct sockaddr_in6 *sin6;
tudi->SRC_length = sizeof (*sin6);
sin6 = (struct sockaddr_in6 *)(tudi + 1);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = connp->conn_fport;
sin6->sin6_addr = fp->sf_faddr;
mp->b_wptr = (uchar_t *)(sin6 + 1);
}
mp->b_cont = emp;
/*
* Notifications are queued regardless of socket rx space. So
* we do not decrement sctp_rwnd here as this will confuse the
* other side.
*/
#ifdef DEBUG
for (emp = mp->b_cont; emp; emp = emp->b_cont) {
rwnd += emp->b_wptr - emp->b_rptr;
}
ASSERT(len == rwnd);
#endif
/*
* Override b_flag for SCTP sockfs internal use
*/
mp->b_flag = (short)SCTP_NOTIFICATION;
rwnd = sctp->sctp_ulp_recv(sctp->sctp_ulpd, mp, msgdsize(mp), 0,
&error, NULL);
if (rwnd > sctp->sctp_rwnd) {
sctp->sctp_rwnd = rwnd;
}
}
void
sctp_assoc_event(sctp_t *sctp, uint16_t state, uint16_t error,
sctp_chunk_hdr_t *ch)
{
struct sctp_assoc_change *sacp;
mblk_t *mp;
uint16_t ch_len;
if (!sctp->sctp_recvassocevnt) {
return;
}
ch_len = (ch != NULL) ? ntohs(ch->sch_len) : 0;
if ((mp = allocb(sizeof (*sacp) + ch_len, BPRI_MED)) == NULL) {
return;
}
sacp = (struct sctp_assoc_change *)mp->b_rptr;
sacp->sac_type = SCTP_ASSOC_CHANGE;
sacp->sac_flags = sctp->sctp_prsctp_aware ? SCTP_PRSCTP_CAPABLE : 0;
sacp->sac_length = sizeof (*sacp) + ch_len;
sacp->sac_state = state;
sacp->sac_error = error;
sacp->sac_outbound_streams = sctp->sctp_num_ostr;
sacp->sac_inbound_streams = sctp->sctp_num_istr;
sacp->sac_assoc_id = 0;
if (ch != NULL)
bcopy(ch, sacp + 1, ch_len);
mp->b_wptr += sacp->sac_length;
sctp_notify(sctp, mp, sacp->sac_length);
}
/*
* Send failure event. Message is expected to have message header still
* in place, data follows in subsequent mblk's.
*/
static void
sctp_sendfail(sctp_t *sctp, mblk_t *msghdr, uint16_t flags, int error)
{
struct sctp_send_failed *sfp;
mblk_t *mp;
sctp_msg_hdr_t *smh;
/* Allocate a mblk for the notification header */
if ((mp = allocb(sizeof (*sfp), BPRI_MED)) == NULL) {
/* give up */
freemsg(msghdr);
return;
}
smh = (sctp_msg_hdr_t *)msghdr->b_rptr;
sfp = (struct sctp_send_failed *)mp->b_rptr;
sfp->ssf_type = SCTP_SEND_FAILED;
sfp->ssf_flags = flags;
sfp->ssf_length = smh->smh_msglen + sizeof (*sfp);
sfp->ssf_error = error;
sfp->ssf_assoc_id = 0;
bzero(&sfp->ssf_info, sizeof (sfp->ssf_info));
sfp->ssf_info.sinfo_stream = smh->smh_sid;
sfp->ssf_info.sinfo_flags = smh->smh_flags;
sfp->ssf_info.sinfo_ppid = smh->smh_ppid;
sfp->ssf_info.sinfo_context = smh->smh_context;
sfp->ssf_info.sinfo_timetolive = TICK_TO_MSEC(smh->smh_ttl);
mp->b_wptr = (uchar_t *)(sfp + 1);
mp->b_cont = msghdr->b_cont;
freeb(msghdr);
sctp_notify(sctp, mp, sfp->ssf_length);
}
/*
* Send failure when the message has been fully chunkified.
*/
static void
sctp_sendfail_sent(sctp_t *sctp, mblk_t *meta, int error)
{
mblk_t *mp;
mblk_t *nmp;
mblk_t *tail;
uint16_t flags = SCTP_DATA_SENT;
if (!sctp->sctp_recvsendfailevnt) {
sctp_free_msg(meta);
return;
}
/*
* We need to remove all data_hdr's.
*/
nmp = meta->b_cont;
tail = meta;
do {
mp = nmp->b_next;
nmp->b_next = NULL;
/*
* If one of the chunks hasn't been sent yet, say that
* the message hasn't been sent.
*/
if (!SCTP_CHUNK_ISSENT(nmp)) {
flags = SCTP_DATA_UNSENT;
}
nmp->b_rptr += sizeof (sctp_data_hdr_t);
if (nmp->b_rptr == nmp->b_wptr) {
tail->b_cont = nmp->b_cont;
freeb(nmp);
} else {
tail->b_cont = nmp;
}
while (tail->b_cont) {
tail = tail->b_cont;
}
} while ((nmp = mp) != NULL);
sctp_sendfail(sctp, meta, flags, error);
}
/*
* Send failure when the message hasn't been fully chunkified.
*/
void
sctp_sendfail_event(sctp_t *sctp, mblk_t *meta, int error, boolean_t chunkified)
{
mblk_t *mp;
mblk_t *nmp;
mblk_t *tail;
if (meta == NULL)
return;
if (!sctp->sctp_recvsendfailevnt) {
sctp_free_msg(meta);
return;
}
/* If the message is fully chunkified */
if (chunkified) {
sctp_sendfail_sent(sctp, meta, error);
return;
}
/*
* Message might be partially chunkified, we need to remove
* all data_hdr's.
*/
mp = meta->b_cont;
tail = meta;
while ((nmp = mp->b_next) != NULL) {
mp->b_next = nmp->b_next;
nmp->b_next = NULL;
nmp->b_rptr += sizeof (sctp_data_hdr_t);
if (nmp->b_rptr == nmp->b_wptr) {
tail->b_cont = nmp->b_cont;
freeb(nmp);
} else {
tail->b_cont = nmp;
}
while (tail->b_cont) {
tail = tail->b_cont;
}
}
tail->b_cont = mp;
sctp_sendfail(sctp, meta, SCTP_DATA_UNSENT, error);
}
void
sctp_regift_xmitlist(sctp_t *sctp)
{
mblk_t *mp;
if (!sctp->sctp_recvsendfailevnt) {
return;
}
while ((mp = sctp->sctp_xmit_head) != NULL) {
sctp->sctp_xmit_head = mp->b_next;
mp->b_next = NULL;
if (sctp->sctp_xmit_head != NULL)
sctp->sctp_xmit_head->b_prev = NULL;
sctp_sendfail_event(sctp, mp, 0, B_TRUE);
}
while ((mp = sctp->sctp_xmit_unsent) != NULL) {
sctp->sctp_xmit_unsent = mp->b_next;
mp->b_next = NULL;
sctp_sendfail_event(sctp, mp, 0, B_FALSE);
}
sctp->sctp_xmit_tail = sctp->sctp_xmit_unsent_tail = NULL;
sctp->sctp_unacked = sctp->sctp_unsent = 0;
}
void
sctp_intf_event(sctp_t *sctp, in6_addr_t addr, int state, int error)
{
struct sctp_paddr_change *spc;
ipaddr_t addr4;
struct sockaddr_in *sin;
struct sockaddr_in6 *sin6;
mblk_t *mp;
if (!sctp->sctp_recvpathevnt) {
return;
}
if ((mp = allocb(sizeof (*spc), BPRI_MED)) == NULL) {
return;
}
spc = (struct sctp_paddr_change *)mp->b_rptr;
spc->spc_type = SCTP_PEER_ADDR_CHANGE;
spc->spc_flags = 0;
spc->spc_length = sizeof (*spc);
if (IN6_IS_ADDR_V4MAPPED(&addr)) {
IN6_V4MAPPED_TO_IPADDR(&addr, addr4);
sin = (struct sockaddr_in *)&spc->spc_aaddr;
sin->sin_family = AF_INET;
sin->sin_port = 0;
sin->sin_addr.s_addr = addr4;
} else {
sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
sin6->sin6_family = AF_INET6;
sin6->sin6_port = 0;
sin6->sin6_addr = addr;
}
spc->spc_state = state;
spc->spc_error = error;
spc->spc_assoc_id = 0;
mp->b_wptr = (uchar_t *)(spc + 1);
sctp_notify(sctp, mp, spc->spc_length);
}
void
sctp_error_event(sctp_t *sctp, sctp_chunk_hdr_t *ch, boolean_t is_asconf)
{
struct sctp_remote_error *sre;
mblk_t *mp;
size_t len;
sctp_parm_hdr_t *errh = NULL;
uint16_t dlen = 0;
uint16_t error = 0;
void *dtail = NULL;
if (!sctp->sctp_recvpeererr) {
return;
}
/*
* ASCONF PARM error chunks :
* PARM_ERROR_IND parm type is always followed by correlation id.
* See sctp_asconf_adderr() and sctp_asconf_prepend_errwrap() as to
* how these error chunks are build.
* error cause wrapper (PARM_ERROR_IND) + correlation id +
* error cause + error cause details.
*
* Regular error chunks :
* See sctp_make_err() as to how these error chunks are build.
* error chunk header (CHUNK_ERROR) + error cause + error cause details.
*/
if (is_asconf) {
if (ntohs(ch->sch_len) >
(sizeof (*ch) + sizeof (uint32_t))) {
errh = (sctp_parm_hdr_t *)((char *)ch +
sizeof (uint32_t) + sizeof (sctp_parm_hdr_t));
}
} else {
if (ntohs(ch->sch_len) > sizeof (*ch)) {
errh = (sctp_parm_hdr_t *)(ch + 1);
}
}
if (errh != NULL) {
error = ntohs(errh->sph_type);
dlen = ntohs(errh->sph_len) - sizeof (*errh);
if (dlen > 0) {
dtail = errh + 1;
}
}
len = sizeof (*sre) + dlen;
if ((mp = allocb(len, BPRI_MED)) == NULL) {
return;
}
sre = (struct sctp_remote_error *)mp->b_rptr;
sre->sre_type = SCTP_REMOTE_ERROR;
sre->sre_flags = 0;
sre->sre_length = len;
sre->sre_assoc_id = 0;
sre->sre_error = error;
if (dtail != NULL) {
bcopy(dtail, sre + 1, dlen);
}
mp->b_wptr = mp->b_rptr + len;
sctp_notify(sctp, mp, len);
}
void
sctp_shutdown_event(sctp_t *sctp)
{
struct sctp_shutdown_event *sse;
mblk_t *mp;
if (!sctp->sctp_recvshutdownevnt) {
return;
}
if ((mp = allocb(sizeof (*sse), BPRI_MED)) == NULL) {
return;
}
sse = (struct sctp_shutdown_event *)mp->b_rptr;
sse->sse_type = SCTP_SHUTDOWN_EVENT;
sse->sse_flags = 0;
sse->sse_length = sizeof (*sse);
sse->sse_assoc_id = 0;
mp->b_wptr = (uchar_t *)(sse + 1);
sctp_notify(sctp, mp, sse->sse_length);
}
void
sctp_adaptation_event(sctp_t *sctp)
{
struct sctp_adaptation_event *sai;
mblk_t *mp;
if (!sctp->sctp_recvalevnt || !sctp->sctp_recv_adaptation) {
return;
}
if ((mp = allocb(sizeof (*sai), BPRI_MED)) == NULL) {
return;
}
sai = (struct sctp_adaptation_event *)mp->b_rptr;
sai->sai_type = SCTP_ADAPTATION_INDICATION;
sai->sai_flags = 0;
sai->sai_length = sizeof (*sai);
sai->sai_assoc_id = 0;
/*
* Adaptation code delivered in network byte order.
*/
sai->sai_adaptation_ind = sctp->sctp_rx_adaptation_code;
mp->b_wptr = (uchar_t *)(sai + 1);
sctp_notify(sctp, mp, sai->sai_length);
sctp->sctp_recv_adaptation = 0; /* in case there's a restart later */
}
/* Send partial deliver event */
void
sctp_partial_delivery_event(sctp_t *sctp)
{
struct sctp_pdapi_event *pdapi;
mblk_t *mp;
if (!sctp->sctp_recvpdevnt)
return;
if ((mp = allocb(sizeof (*pdapi), BPRI_MED)) == NULL)
return;
pdapi = (struct sctp_pdapi_event *)mp->b_rptr;
pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
pdapi->pdapi_flags = 0;
pdapi->pdapi_length = sizeof (*pdapi);
pdapi->pdapi_indication = SCTP_PARTIAL_DELIVERY_ABORTED;
pdapi->pdapi_assoc_id = 0;
mp->b_wptr = (uchar_t *)(pdapi + 1);
sctp_notify(sctp, mp, pdapi->pdapi_length);
}