/*
* To change the currently used peer address to the specified one.
*/
void
sctp_set_faddr_current(sctp_t *sctp, sctp_faddr_t *fp)
{
/* Now setup the composite header. */
if (fp->isv4) {
IN6_V4MAPPED_TO_IPADDR(&fp->faddr,
sctp->sctp_ipha->ipha_dst);
IN6_V4MAPPED_TO_IPADDR(&fp->saddr, sctp->sctp_ipha->ipha_src);
/* update don't fragment bit */
if (fp->df) {
sctp->sctp_ipha->ipha_fragment_offset_and_flags =
htons(IPH_DF);
} else {
sctp->sctp_ipha->ipha_fragment_offset_and_flags = 0;
}
} else {
sctp->sctp_ip6h->ip6_dst = fp->faddr;
sctp->sctp_ip6h->ip6_src = fp->saddr;
}
sctp->sctp_current = fp;
sctp->sctp_mss = fp->sfa_pmss;
/* Update the uppper layer for the change. */
if (!SCTP_IS_DETACHED(sctp))
sctp_set_ulp_prop(sctp);
}
/*
* au_to_in_addr_ex
* returns:
* pointer to au_membuf chain containing an ipv6 token
*/
token_t *
au_to_in_addr_ex(int32_t *internet_addr)
{
token_t *m; /* local au_membuf */
adr_t adr; /* adr memory stream header */
char data_header_v4 = AUT_IN_ADDR; /* header for v4 token */
char data_header_v6 = AUT_IN_ADDR_EX; /* header for v6 token */
int32_t type = AU_IPv6;
m = au_getclr();
adr_start(&adr, memtod(m, char *));
if (IN6_IS_ADDR_V4MAPPED((in6_addr_t *)internet_addr)) {
ipaddr_t in4;
/*
* An IPv4-mapped IPv6 address is really an IPv4 address
* in IPv6 format.
*/
IN6_V4MAPPED_TO_IPADDR((in6_addr_t *)internet_addr, in4);
adr_char(&adr, &data_header_v4, 1);
adr_char(&adr, (char *)&in4, sizeof (ipaddr_t));
} else {
adr_char(&adr, &data_header_v6, 1);
adr_int32(&adr, &type, 1);
adr_char(&adr, (char *)internet_addr, sizeof (struct in6_addr));
}
m->len = adr_count(&adr);
return (m);
}
static boolean_t
check_rtm_addr(const struct ifa_msghdr *ifam, int msglen, boolean_t isv6,
const in6_addr_t *addr)
{
const char *cp, *lim;
uint_t flag;
const struct sockaddr *sa;
if (!(ifam->ifam_addrs & RTA_IFA))
return (B_FALSE);
cp = (const char *)(ifam + 1);
lim = (const char *)ifam + msglen;
for (flag = 1; flag < RTA_IFA; flag <<= 1) {
if (ifam->ifam_addrs & flag) {
/* LINTED: alignment */
sa = (const struct sockaddr *)cp;
if ((const char *)(sa + 1) > lim)
return (B_FALSE);
switch (sa->sa_family) {
case AF_INET:
cp += sizeof (struct sockaddr_in);
break;
case AF_LINK:
cp += sizeof (struct sockaddr_dl);
break;
case AF_INET6:
cp += sizeof (struct sockaddr_in6);
break;
default:
cp += sizeof (struct sockaddr);
break;
}
}
}
if (isv6) {
const struct sockaddr_in6 *sin6;
/* LINTED: alignment */
sin6 = (const struct sockaddr_in6 *)cp;
if ((const char *)(sin6 + 1) > lim)
return (B_FALSE);
if (sin6->sin6_family != AF_INET6)
return (B_FALSE);
return (IN6_ARE_ADDR_EQUAL(&sin6->sin6_addr, addr));
} else {
const struct sockaddr_in *sinp;
ipaddr_t v4addr;
/* LINTED: alignment */
sinp = (const struct sockaddr_in *)cp;
if ((const char *)(sinp + 1) > lim)
return (B_FALSE);
if (sinp->sin_family != AF_INET)
return (B_FALSE);
IN6_V4MAPPED_TO_IPADDR(addr, v4addr);
return (sinp->sin_addr.s_addr == v4addr);
}
}
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);
}
/* 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->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->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->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;
}
}
/*
* Returns 0 on success, ENOMEM on memory allocation failure, EHOSTUNREACH
* if the connection credentials fail remote host accreditation or
* if the new destination does not support the previously established
* connection security label. If sleep is true, this function should
* never fail for a memory allocation failure. The boolean parameter
* "first" decides whether the newly created faddr structure should be
* added at the beginning of the list or at the end.
*
* Note: caller must hold conn fanout lock.
*/
int
sctp_add_faddr(sctp_t *sctp, in6_addr_t *addr, int sleep, boolean_t first)
{
sctp_faddr_t *faddr;
mblk_t *timer_mp;
int err;
conn_t *connp = sctp->sctp_connp;
if (is_system_labeled()) {
ip_xmit_attr_t *ixa = connp->conn_ixa;
ts_label_t *effective_tsl = NULL;
ASSERT(ixa->ixa_tsl != NULL);
/*
* Verify the destination is allowed to receive packets
* at the security label of the connection we are initiating.
*
* tsol_check_dest() will create a new effective label for
* this connection with a modified label or label flags only
* if there are changes from the original label.
*
* Accept whatever label we get if this is the first
* destination address for this connection. The security
* label and label flags must match any previuous settings
* for all subsequent destination addresses.
*/
if (IN6_IS_ADDR_V4MAPPED(addr)) {
uint32_t dst;
IN6_V4MAPPED_TO_IPADDR(addr, dst);
err = tsol_check_dest(ixa->ixa_tsl,
&dst, IPV4_VERSION, connp->conn_mac_mode,
connp->conn_zone_is_global, &effective_tsl);
} else {
err = tsol_check_dest(ixa->ixa_tsl,
addr, IPV6_VERSION, connp->conn_mac_mode,
connp->conn_zone_is_global, &effective_tsl);
}
if (err != 0)
return (err);
if (sctp->sctp_faddrs == NULL && effective_tsl != NULL) {
ip_xmit_attr_replace_tsl(ixa, effective_tsl);
} else if (effective_tsl != NULL) {
label_rele(effective_tsl);
return (EHOSTUNREACH);
}
}
if ((faddr = kmem_cache_alloc(sctp_kmem_faddr_cache, sleep)) == NULL)
return (ENOMEM);
bzero(faddr, sizeof (*faddr));
timer_mp = sctp_timer_alloc((sctp), sctp_rexmit_timer, sleep);
if (timer_mp == NULL) {
kmem_cache_free(sctp_kmem_faddr_cache, faddr);
return (ENOMEM);
}
((sctpt_t *)(timer_mp->b_rptr))->sctpt_faddr = faddr;
/* Start with any options set on the conn */
faddr->ixa = conn_get_ixa_exclusive(connp);
if (faddr->ixa == NULL) {
freemsg(timer_mp);
kmem_cache_free(sctp_kmem_faddr_cache, faddr);
return (ENOMEM);
}
faddr->ixa->ixa_notify_cookie = connp->conn_sctp;
sctp_init_faddr(sctp, faddr, addr, timer_mp);
ASSERT(faddr->ixa->ixa_cred != NULL);
/* ip_attr_connect didn't allow broadcats/multicast dest */
ASSERT(faddr->next == NULL);
if (sctp->sctp_faddrs == NULL) {
ASSERT(sctp->sctp_lastfaddr == NULL);
/* only element on list; first and last are same */
sctp->sctp_faddrs = sctp->sctp_lastfaddr = faddr;
} else if (first) {
ASSERT(sctp->sctp_lastfaddr != NULL);
faddr->next = sctp->sctp_faddrs;
sctp->sctp_faddrs = faddr;
} else {
sctp->sctp_lastfaddr->next = faddr;
sctp->sctp_lastfaddr = faddr;
}
sctp->sctp_nfaddrs++;
return (0);
}
/*
* The sender must later set the total length in the IP header.
*/
mblk_t *
sctp_make_mp(sctp_t *sctp, sctp_faddr_t *fp, int trailer)
{
mblk_t *mp;
size_t ipsctplen;
int isv4;
sctp_stack_t *sctps = sctp->sctp_sctps;
boolean_t src_changed = B_FALSE;
ASSERT(fp != NULL);
isv4 = fp->isv4;
if (SCTP_IS_ADDR_UNSPEC(isv4, fp->saddr) ||
(fp->ixa->ixa_ire->ire_flags & (RTF_REJECT|RTF_BLACKHOLE))) {
/* Need to pick a source */
sctp_get_dest(sctp, fp);
/*
* Although we still may not get an IRE, the source address
* may be changed in sctp_get_ire(). Set src_changed to
* true so that the source address is copied again.
*/
src_changed = B_TRUE;
}
/* There is no suitable source address to use, return. */
if (fp->state == SCTP_FADDRS_UNREACH)
return (NULL);
ASSERT(fp->ixa->ixa_ire != NULL);
ASSERT(!SCTP_IS_ADDR_UNSPEC(isv4, fp->saddr));
if (isv4) {
ipsctplen = sctp->sctp_hdr_len;
} else {
ipsctplen = sctp->sctp_hdr6_len;
}
mp = allocb(ipsctplen + sctps->sctps_wroff_xtra + trailer, BPRI_MED);
if (mp == NULL) {
ip1dbg(("sctp_make_mp: error making mp..\n"));
return (NULL);
}
mp->b_rptr += sctps->sctps_wroff_xtra;
mp->b_wptr = mp->b_rptr + ipsctplen;
ASSERT(OK_32PTR(mp->b_wptr));
if (isv4) {
ipha_t *iph = (ipha_t *)mp->b_rptr;
bcopy(sctp->sctp_iphc, mp->b_rptr, ipsctplen);
if (fp != sctp->sctp_current || src_changed) {
/* Fix the source and destination addresses. */
IN6_V4MAPPED_TO_IPADDR(&fp->faddr, iph->ipha_dst);
IN6_V4MAPPED_TO_IPADDR(&fp->saddr, iph->ipha_src);
}
/* set or clear the don't fragment bit */
if (fp->df) {
iph->ipha_fragment_offset_and_flags = htons(IPH_DF);
} else {
iph->ipha_fragment_offset_and_flags = 0;
}
} else {
bcopy(sctp->sctp_iphc6, mp->b_rptr, ipsctplen);
if (fp != sctp->sctp_current || src_changed) {
/* Fix the source and destination addresses. */
((ip6_t *)(mp->b_rptr))->ip6_dst = fp->faddr;
((ip6_t *)(mp->b_rptr))->ip6_src = fp->saddr;
}
}
ASSERT(sctp->sctp_connp != NULL);
return (mp);
}
/*
* Returns 0 if the check failed and the restart should be refused,
* 1 if the check succeeded.
*/
int
sctp_secure_restart_check(mblk_t *pkt, sctp_chunk_hdr_t *ich, uint32_t ports,
int sleep, sctp_stack_t *sctps, ip_recv_attr_t *ira)
{
sctp_faddr_t *fp, *fphead = NULL;
sctp_parm_hdr_t *ph;
ssize_t remaining;
int isv4;
ipha_t *iph;
ip6_t *ip6h;
in6_addr_t hdraddr[1];
int retval = 0;
sctp_tf_t *tf;
sctp_t *sctp;
int compres;
sctp_init_chunk_t *init;
int nadded = 0;
/* extract the address from the IP header */
isv4 = (IPH_HDR_VERSION(pkt->b_rptr) == IPV4_VERSION);
if (isv4) {
iph = (ipha_t *)pkt->b_rptr;
IN6_IPADDR_TO_V4MAPPED(iph->ipha_src, hdraddr);
} else {
ip6h = (ip6_t *)pkt->b_rptr;
hdraddr[0] = ip6h->ip6_src;
}
/* Walk the params in the INIT [ACK], pulling out addr params */
remaining = ntohs(ich->sch_len) - sizeof (*ich) -
sizeof (sctp_init_chunk_t);
if (remaining < sizeof (*ph)) {
/* no parameters; restart OK */
return (1);
}
init = (sctp_init_chunk_t *)(ich + 1);
ph = (sctp_parm_hdr_t *)(init + 1);
while (ph != NULL) {
sctp_faddr_t *fpa = NULL;
/* params will have already been byteordered when validating */
if (ph->sph_type == htons(PARM_ADDR4)) {
if (remaining >= PARM_ADDR4_LEN) {
in6_addr_t addr;
IN6_INADDR_TO_V4MAPPED((struct in_addr *)
(ph + 1), &addr);
fpa = kmem_cache_alloc(sctp_kmem_faddr_cache,
sleep);
if (fpa == NULL) {
goto done;
}
bzero(fpa, sizeof (*fpa));
fpa->faddr = addr;
fpa->next = NULL;
}
} else if (ph->sph_type == htons(PARM_ADDR6)) {
if (remaining >= PARM_ADDR6_LEN) {
fpa = kmem_cache_alloc(sctp_kmem_faddr_cache,
sleep);
if (fpa == NULL) {
goto done;
}
bzero(fpa, sizeof (*fpa));
bcopy(ph + 1, &fpa->faddr,
sizeof (fpa->faddr));
fpa->next = NULL;
}
}
/* link in the new addr, if it was an addr param */
if (fpa != NULL) {
if (fphead == NULL) {
fphead = fpa;
} else {
fpa->next = fphead;
fphead = fpa;
}
}
ph = sctp_next_parm(ph, &remaining);
}
if (fphead == NULL) {
/* no addr parameters; restart OK */
return (1);
}
/*
* got at least one; make sure the header's addr is
* in the list
*/
fp = sctp_lookup_faddr_nosctp(fphead, hdraddr);
if (fp == NULL) {
/* not included; add it now */
fp = kmem_cache_alloc(sctp_kmem_faddr_cache, sleep);
if (fp == NULL) {
goto done;
}
bzero(fp, sizeof (*fp));
fp->faddr = *hdraddr;
fp->next = fphead;
fphead = fp;
}
/*
* Now, we can finally do the check: For each sctp instance
* on the hash line for ports, compare its faddr set against
* the new one. If the new one is a strict subset of any
* existing sctp's faddrs, the restart is OK. However, if there
* is an overlap, this could be an attack, so return failure.
* If all sctp's faddrs are disjoint, this is a legitimate new
* association.
*/
tf = &(sctps->sctps_conn_fanout[SCTP_CONN_HASH(sctps, ports)]);
mutex_enter(&tf->tf_lock);
for (sctp = tf->tf_sctp; sctp; sctp = sctp->sctp_conn_hash_next) {
if (ports != sctp->sctp_connp->conn_ports) {
continue;
}
compres = sctp_compare_faddrsets(fphead, sctp->sctp_faddrs);
if (compres <= SCTP_ADDR_SUBSET) {
retval = 1;
mutex_exit(&tf->tf_lock);
goto done;
}
if (compres == SCTP_ADDR_OVERLAP) {
dprint(1,
("new assoc from %x:%x:%x:%x overlaps with %p\n",
SCTP_PRINTADDR(*hdraddr), (void *)sctp));
/*
* While we still hold the lock, we need to
* figure out which addresses have been
* added so we can include them in the abort
* we will send back. Since these faddrs will
* never be used, we overload the rto field
* here, setting it to 0 if the address was
* not added, 1 if it was added.
*/
for (fp = fphead; fp; fp = fp->next) {
if (sctp_lookup_faddr(sctp, &fp->faddr)) {
fp->rto = 0;
} else {
fp->rto = 1;
nadded++;
}
}
mutex_exit(&tf->tf_lock);
goto done;
}
}
mutex_exit(&tf->tf_lock);
/* All faddrs are disjoint; legit new association */
retval = 1;
done:
/* If are attempted adds, send back an abort listing the addrs */
if (nadded > 0) {
void *dtail;
size_t dlen;
dtail = kmem_alloc(PARM_ADDR6_LEN * nadded, KM_NOSLEEP);
if (dtail == NULL) {
goto cleanup;
}
ph = dtail;
dlen = 0;
for (fp = fphead; fp; fp = fp->next) {
if (fp->rto == 0) {
continue;
}
if (IN6_IS_ADDR_V4MAPPED(&fp->faddr)) {
ipaddr_t addr4;
ph->sph_type = htons(PARM_ADDR4);
ph->sph_len = htons(PARM_ADDR4_LEN);
IN6_V4MAPPED_TO_IPADDR(&fp->faddr, addr4);
ph++;
bcopy(&addr4, ph, sizeof (addr4));
ph = (sctp_parm_hdr_t *)
((char *)ph + sizeof (addr4));
dlen += PARM_ADDR4_LEN;
} else {
ph->sph_type = htons(PARM_ADDR6);
ph->sph_len = htons(PARM_ADDR6_LEN);
ph++;
bcopy(&fp->faddr, ph, sizeof (fp->faddr));
ph = (sctp_parm_hdr_t *)
((char *)ph + sizeof (fp->faddr));
dlen += PARM_ADDR6_LEN;
}
}
/* Send off the abort */
sctp_send_abort(sctp, sctp_init2vtag(ich),
SCTP_ERR_RESTART_NEW_ADDRS, dtail, dlen, pkt, 0, B_TRUE,
ira);
kmem_free(dtail, PARM_ADDR6_LEN * nadded);
}
cleanup:
/* Clean up */
if (fphead) {
sctp_faddr_t *fpn;
for (fp = fphead; fp; fp = fpn) {
fpn = fp->next;
if (fp->ixa != NULL) {
ixa_refrele(fp->ixa);
fp->ixa = NULL;
}
kmem_cache_free(sctp_kmem_faddr_cache, fp);
}
}
return (retval);
}
void
sctp_wput_asconf(sctp_t *sctp, sctp_faddr_t *fp)
{
#define SCTP_SET_SENT_FLAG(mp) ((mp)->b_flag = SCTP_CHUNK_FLAG_SENT)
mblk_t *mp;
mblk_t *ipmp;
uint32_t *snp;
sctp_parm_hdr_t *ph;
boolean_t isv4;
sctp_stack_t *sctps = sctp->sctp_sctps;
boolean_t saddr_set;
if (sctp->sctp_cchunk_pend || sctp->sctp_cxmit_list == NULL ||
/* Queue it for later transmission if not yet established */
sctp->sctp_state < SCTPS_ESTABLISHED) {
ip2dbg(("sctp_wput_asconf: cchunk pending? (%d) or null "\
"sctp_cxmit_list? (%s) or incorrect state? (%x)\n",
sctp->sctp_cchunk_pend, sctp->sctp_cxmit_list == NULL ?
"yes" : "no", sctp->sctp_state));
return;
}
if (fp == NULL)
fp = sctp->sctp_current;
/* OK to send */
ipmp = sctp_make_mp(sctp, fp, 0);
if (ipmp == NULL) {
SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto);
SCTP_KSTAT(sctps, sctp_send_asconf_failed);
return;
}
mp = sctp->sctp_cxmit_list;
/* Fill in the mandatory Address Parameter TLV */
isv4 = (fp != NULL) ? fp->isv4 : sctp->sctp_current->isv4;
ph = (sctp_parm_hdr_t *)(mp->b_rptr + sizeof (sctp_chunk_hdr_t) +
sizeof (uint32_t));
if (isv4) {
ipha_t *ipha = (ipha_t *)ipmp->b_rptr;
in6_addr_t ipaddr;
ipaddr_t addr4;
ph->sph_type = htons(PARM_ADDR4);
ph->sph_len = htons(PARM_ADDR4_LEN);
if (ipha->ipha_src != INADDR_ANY) {
bcopy(&ipha->ipha_src, ph + 1, IP_ADDR_LEN);
} else {
ipaddr = sctp_get_valid_addr(sctp, B_FALSE, &saddr_set);
/*
* All the addresses are down.
* Maybe we might have better luck next time.
*/
if (!saddr_set) {
SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto);
freeb(ipmp);
return;
}
IN6_V4MAPPED_TO_IPADDR(&ipaddr, addr4);
bcopy(&addr4, ph + 1, IP_ADDR_LEN);
}
} else {
ip6_t *ip6 = (ip6_t *)ipmp->b_rptr;
in6_addr_t ipaddr;
ph->sph_type = htons(PARM_ADDR6);
ph->sph_len = htons(PARM_ADDR6_LEN);
if (!IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
bcopy(&ip6->ip6_src, ph + 1, IPV6_ADDR_LEN);
} else {
ipaddr = sctp_get_valid_addr(sctp, B_TRUE, &saddr_set);
/*
* All the addresses are down.
* Maybe we might have better luck next time.
*/
if (!saddr_set) {
SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto);
freeb(ipmp);
return;
}
bcopy(&ipaddr, ph + 1, IPV6_ADDR_LEN);
}
}
/* Don't exceed CWND */
if ((MBLKL(mp) > (fp->cwnd - fp->suna)) ||
((mp = dupb(sctp->sctp_cxmit_list)) == NULL)) {
SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto);
freeb(ipmp);
return;
}
/* Set the serial number now, if sending for the first time */
if (!SCTP_CHUNK_WANT_REXMIT(mp)) {
snp = (uint32_t *)(mp->b_rptr + sizeof (sctp_chunk_hdr_t));
*snp = htonl(sctp->sctp_lcsn++);
}
SCTP_CHUNK_CLEAR_FLAGS(mp);
fp->suna += MBLKL(mp);
/* Attach the header and send the chunk */
ipmp->b_cont = mp;
sctp->sctp_cchunk_pend = 1;
SCTP_SET_SENT_FLAG(sctp->sctp_cxmit_list);
SCTP_SET_CHUNK_DEST(sctp->sctp_cxmit_list, fp);
sctp_set_iplen(sctp, ipmp, fp->ixa);
(void) conn_ip_output(ipmp, fp->ixa);
BUMP_LOCAL(sctp->sctp_opkts);
SCTP_FADDR_RC_TIMER_RESTART(sctp, fp, fp->rto);
#undef SCTP_SET_SENT_FLAG
}
boolean_t
dhcp_extending(dhcp_smach_t *dsmp)
{
dhcp_pkt_t *dpkt;
stop_pkt_retransmission(dsmp);
/*
* We change state here because this function is also called when
* adopting a lease and on demand by the user.
*/
if (dsmp->dsm_state == BOUND) {
dsmp->dsm_neg_hrtime = gethrtime();
dsmp->dsm_bad_offers = 0;
dsmp->dsm_sent = 0;
dsmp->dsm_received = 0;
/* Bound->renew can't fail */
(void) set_smach_state(dsmp, RENEWING);
}
dhcpmsg(MSG_DEBUG, "dhcp_extending: sending request on %s",
dsmp->dsm_name);
if (dsmp->dsm_isv6) {
dhcp_lease_t *dlp;
dhcp_lif_t *lif;
uint_t nlifs;
uint_t irt, mrt;
/*
* Start constructing the Renew/Rebind message. Only Renew has
* a server ID, as we still think our server might be
* reachable.
*/
if (dsmp->dsm_state == RENEWING) {
dpkt = init_pkt(dsmp, DHCPV6_MSG_RENEW);
(void) add_pkt_opt(dpkt, DHCPV6_OPT_SERVERID,
dsmp->dsm_serverid, dsmp->dsm_serveridlen);
irt = DHCPV6_REN_TIMEOUT;
mrt = DHCPV6_REN_MAX_RT;
} else {
dpkt = init_pkt(dsmp, DHCPV6_MSG_REBIND);
irt = DHCPV6_REB_TIMEOUT;
mrt = DHCPV6_REB_MAX_RT;
}
/*
* Loop over the leases, and add an IA_NA for each and an
* IAADDR for each address.
*/
for (dlp = dsmp->dsm_leases; dlp != NULL; dlp = dlp->dl_next) {
lif = dlp->dl_lifs;
for (nlifs = dlp->dl_nlifs; nlifs > 0;
nlifs--, lif = lif->lif_next) {
(void) add_pkt_lif(dpkt, lif,
DHCPV6_STAT_SUCCESS, NULL);
}
}
/* Add required Option Request option */
(void) add_pkt_prl(dpkt, dsmp);
return (send_pkt_v6(dsmp, dpkt, dsmp->dsm_server,
stop_extending, irt, mrt));
} else {
dhcp_lif_t *lif = dsmp->dsm_lif;
ipaddr_t server;
/* assemble the DHCPREQUEST message. */
dpkt = init_pkt(dsmp, REQUEST);
dpkt->pkt->ciaddr.s_addr = lif->lif_addr;
/*
* The max dhcp message size option is set to the interface
* max, minus the size of the udp and ip headers.
*/
(void) add_pkt_opt16(dpkt, CD_MAX_DHCP_SIZE,
htons(lif->lif_max - sizeof (struct udpiphdr)));
(void) add_pkt_opt32(dpkt, CD_LEASE_TIME, htonl(DHCP_PERM));
if (class_id_len != 0) {
(void) add_pkt_opt(dpkt, CD_CLASS_ID, class_id,
class_id_len);
}
(void) add_pkt_prl(dpkt, dsmp);
/*
* dsm_reqhost was set for this state machine in
* dhcp_selecting() if the REQUEST_HOSTNAME option was set and
* a host name was found.
*/
if (!dhcp_add_fqdn_opt(dpkt, dsmp) &&
dsmp->dsm_reqhost != NULL) {
(void) add_pkt_opt(dpkt, CD_HOSTNAME, dsmp->dsm_reqhost,
strlen(dsmp->dsm_reqhost));
}
(void) add_pkt_opt(dpkt, CD_END, NULL, 0);
IN6_V4MAPPED_TO_IPADDR(&dsmp->dsm_server, server);
return (send_pkt(dsmp, dpkt, server, stop_extending));
}
}
int
inet_matchaddr(const void *sa, const char *name)
{
int ret = -1;
char *lname, *mp, *p;
char *ep;
int serrno = errno;
uint32_t claddr4 = 0;
if ((p = lname = strdup(name)) == NULL) {
errno = ENOMEM;
return (-1);
}
if ((mp = strchr(p, '/')) != NULL)
*mp++ = '\0';
switch (((struct sockaddr_in *)sa)->sin_family) {
case AF_INET6: {
char *pp;
ipaddr_t ipaddr4;
struct in6_addr hcaddr6;
struct in6_addr *claddr6 =
&((struct sockaddr_in6 *)sa)->sin6_addr;
if (!IN6_IS_ADDR_V4MAPPED(claddr6)) {
/* IPv6 address */
if (*p != '[') {
errno = EINVAL;
break;
}
p++;
if ((pp = strchr(p, ']')) == NULL ||
(mp != NULL && pp != mp - 2) ||
(mp == NULL && *(pp + 1) != '\0')) {
errno = EINVAL;
break;
}
*pp = '\0';
if (inet_pton(AF_INET6, p, &hcaddr6) != 1) {
errno = EINVAL;
break;
}
if (mp != NULL) {
/* Match only first prefix bits */
long prefix6;
errno = 0;
prefix6 = strtol(mp, &ep, 10);
if (errno != 0 || prefix6 < 0 ||
prefix6 > 128 || *ep != '\0') {
errno = EINVAL;
break;
}
ret = IN6_ARE_PREFIXEDADDR_EQUAL(claddr6,
&hcaddr6, prefix6) ? 1 : 0;
break;
} else {
/* No prefix, exact match */
ret = IN6_ARE_ADDR_EQUAL(claddr6,
&hcaddr6) ? 1 : 0;
break;
}
} else {
/* IPv4-mapped IPv6 address, fallthrough to IPv4 */
IN6_V4MAPPED_TO_IPADDR(claddr6, ipaddr4);
claddr4 = ntohl(ipaddr4);
}
}
/*FALLTHROUGH*/
case AF_INET: {
int i;
uint32_t hcaddr4 = 0, mask4;
if (claddr4 == 0) {
claddr4 = ntohl(
((struct sockaddr_in *)sa)->sin_addr.s_addr);
}
for (i = 0; i < 4; i++) {
long qaddr4;
errno = 0;
qaddr4 = strtol(p, &ep, 10);
if (errno != 0 || qaddr4 < 0 || qaddr4 > 255 ||
(*ep != '.' && *ep != '\0')) {
errno = EINVAL;
break;
}
hcaddr4 |= qaddr4 << ((3 - i) * 8);
if (*ep == '\0')
break;
p = ep + 1;
}
if (errno != 0)
break;
if (mp != NULL) {
/* Mask is specified explicitly */
long mb;
errno = 0;
mb = strtol(mp, &ep, 10);
if (errno != 0 || mb < 0 || mb > 32 || *ep != '\0') {
errno = EINVAL;
break;
}
mask4 = mb ? ~0 << ((sizeof (struct in_addr) * NBBY)
- mb) : 0;
hcaddr4 &= mask4;
} else {
/*
* Use old-fashioned implicit netmasking by checking
* for lower-end zeroes. On the off chance we don't
* match any well-known prefixes, return an exact-
* match prefix which is misleadingly labelled as
* IN_CLASSE_NET.
*/
if ((hcaddr4 & IN_CLASSA_HOST) == 0)
mask4 = IN_CLASSA_NET;
else if ((hcaddr4 & IN_CLASSB_HOST) == 0)
mask4 = IN_CLASSB_NET;
else if ((hcaddr4 & IN_CLASSC_HOST) == 0)
mask4 = IN_CLASSC_NET;
else
mask4 = IN_CLASSE_NET;
}
ret = ((claddr4 & mask4) == hcaddr4) ? 1 : 0;
break;
}
}
free(lname);
if (ret != -1)
errno = serrno;
return (ret);
}
