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|
/* $OpenBSD: ip_ipsp.c,v 1.31 1999/01/11 22:52:10 deraadt Exp $ */
/*
* The authors of this code are John Ioannidis (ji@tla.org),
* Angelos D. Keromytis (kermit@csd.uch.gr) and
* Niels Provos (provos@physnet.uni-hamburg.de).
*
* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
* in November 1995.
*
* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
* by Angelos D. Keromytis.
*
* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
* and Niels Provos.
*
* Copyright (C) 1995, 1996, 1997, 1998 by John Ioannidis, Angelos D. Keromytis
* and Niels Provos.
*
* Permission to use, copy, and modify this software without fee
* is hereby granted, provided that this entire notice is included in
* all copies of any software which is or includes a copy or
* modification of this software.
* You may use this code under the GNU public license if you so wish. Please
* contribute changes back to the authors under this freer than GPL license
* so that we may further the use of strong encryption without limitations to
* all.
*
* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*/
/*
* IPSP Processing
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/domain.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#include <netinet/ip_icmp.h>
#include <net/raw_cb.h>
#include <net/encap.h>
#include <netinet/ip_ipsp.h>
#include <netinet/ip_ah.h>
#include <netinet/ip_esp.h>
#include <dev/rndvar.h>
#include <sys/syslog.h>
#ifdef ENCDEBUG
#define DPRINTF(x) if (encdebug) printf x
#else
#define DPRINTF(x)
#endif
int tdb_init __P((struct tdb *, struct mbuf *));
int ipsp_kern __P((int, char **, int));
u_int8_t get_sa_require __P((struct inpcb *));
int check_ipsec_policy __P((struct inpcb *, u_int32_t));
extern void encap_sendnotify __P((int, struct tdb *, void *));
extern int ipsec_auth_default_level;
extern int ipsec_esp_trans_default_level;
extern int ipsec_esp_network_default_level;
int encdebug = 0;
u_int32_t kernfs_epoch = 0;
/*
* This is the proper place to define the various encapsulation transforms.
*/
struct xformsw xformsw[] = {
{ XF_IP4, 0, "IPv4 Simple Encapsulation",
ipe4_attach, ipe4_init, ipe4_zeroize,
(struct mbuf * (*)(struct mbuf *, struct tdb *))ipe4_input,
ipe4_output, },
{ XF_OLD_AH, XFT_AUTH, "Keyed Authentication, RFC 1828/1852",
ah_old_attach, ah_old_init, ah_old_zeroize,
ah_old_input, ah_old_output, },
{ XF_OLD_ESP, XFT_CONF, "Simple Encryption, RFC 1829/1851",
esp_old_attach, esp_old_init, esp_old_zeroize,
esp_old_input, esp_old_output, },
{ XF_NEW_AH, XFT_AUTH, "HMAC Authentication",
ah_new_attach, ah_new_init, ah_new_zeroize,
ah_new_input, ah_new_output, },
{ XF_NEW_ESP, XFT_CONF|XFT_AUTH,
"Encryption + Authentication + Replay Protection",
esp_new_attach, esp_new_init, esp_new_zeroize,
esp_new_input, esp_new_output, },
};
struct xformsw *xformswNXFORMSW = &xformsw[sizeof(xformsw)/sizeof(xformsw[0])];
unsigned char ipseczeroes[IPSEC_ZEROES_SIZE]; /* zeroes! */
/*
* Check which transformationes are required
*/
u_int8_t
get_sa_require(struct inpcb *inp)
{
u_int8_t sareq = 0;
if (inp != NULL) {
sareq |= inp->inp_seclevel[SL_AUTH] >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_AUTH : 0;
sareq |= inp->inp_seclevel[SL_ESP_TRANS] >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_CONF : 0;
sareq |= inp->inp_seclevel[SL_ESP_NETWORK] >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_TUNNEL : 0;
} else {
sareq |= ipsec_auth_default_level >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_AUTH : 0;
sareq |= ipsec_esp_trans_default_level >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_CONF : 0;
sareq |= ipsec_esp_network_default_level >= IPSEC_LEVEL_USE ?
NOTIFY_SATYPE_TUNNEL : 0;
}
return (sareq);
}
/*
* Check the socket policy and request a new SA with a key management
* daemon. Sometime the inp does not contain the destination address
* in that case use dst.
*/
int
check_ipsec_policy(struct inpcb *inp, u_int32_t daddr)
{
struct socket *so;
struct route_enc re0, *re = &re0;
struct sockaddr_encap *dst;
struct tdb tmptdb;
u_int8_t sa_require, sa_have;
int error, i;
if (inp == NULL || ((so=inp->inp_socket) == 0))
return (EINVAL);
/* If IPSEC is not required just use what we got */
if (!(sa_require = inp->inp_secrequire))
return 0;
bzero((caddr_t) re, sizeof(*re));
dst = (struct sockaddr_encap *) &re->re_dst;
dst->sen_family = AF_ENCAP;
dst->sen_len = SENT_IP4_LEN;
dst->sen_type = SENT_IP4;
dst->sen_ip_src = inp->inp_laddr;
dst->sen_ip_dst.s_addr = inp->inp_faddr.s_addr ?
inp->inp_faddr.s_addr : daddr;
dst->sen_proto = so->so_proto->pr_protocol;
switch (dst->sen_proto) {
case IPPROTO_UDP:
case IPPROTO_TCP:
dst->sen_sport = inp->inp_lport;
dst->sen_dport = inp->inp_fport;
break;
default:
dst->sen_sport = 0;
dst->sen_dport = 0;
}
/* Try to find a flow */
rtalloc((struct route *) re);
if (re->re_rt != NULL) {
struct tdb *tdb;
struct sockaddr_encap *gw;
gw = (struct sockaddr_encap *) (re->re_rt->rt_gateway);
if (gw->sen_type == SENT_IPSP) {
tdb = (struct tdb *) gettdb(gw->sen_ipsp_spi,
gw->sen_ipsp_dst,
gw->sen_ipsp_sproto);
SPI_CHAIN_ATTRIB(sa_have, tdb_onext, tdb);
} else
sa_have = 0;
RTFREE(re->re_rt);
/* Check if our requirements are met */
if (!(sa_require & ~sa_have))
return 0;
} else
sa_have = 0;
error = i = 0;
inp->inp_secresult = SR_WAIT;
/* If necessary try to notify keymanagement three times */
while (i < 3) {
DPRINTF(("ipsec: send SA request (%d), remote ip: %0x, SA type: %d\n", i+1, dst->sen_ip_dst, sa_require));
/* Send notify */
bzero((caddr_t) &tmptdb, sizeof(tmptdb));
tmptdb.tdb_src = dst->sen_ip_src;
tmptdb.tdb_dst = dst->sen_ip_dst;
/*
* When we already have an insufficient SA, we need to
* establish a new SA which combines the required
* attributes and the already existant. This can go
* once we can do socket specific keying.
*/
tmptdb.tdb_satype = sa_require | sa_have;
encap_sendnotify(NOTIFY_REQUEST_SA, &tmptdb, inp);
/*
* Wait for the keymanagement daemon to establich a new SA,
* even on error check again, perhaps some other process
* already established the necessary SA.
*/
error = tsleep((caddr_t)inp, PSOCK|PCATCH, "ipsecnotify", 30*hz);
DPRINTF(("check_ipsec: sleep %d\n", error));
if (error && error != EWOULDBLOCK)
break;
/*
* A Key Management daemon returned an apropriate SA back
* to the kernel, the kernel noted that state in the waiting
* socket.
*/
if (inp->inp_secresult == SR_SUCCESS)
return (0);
/*
* Key Management returned a permanent failure, we do not
* need to retry again. XXX - when more than one key
* management daemon is available we can not do that.
*/
if (inp->inp_secresult == SR_FAILED)
break;
i++;
}
return (error ? error : EWOULDBLOCK);
}
/*
* Reserve an SPI; the SA is not valid yet though. Zero is reserved as
* an error return value. If tspi is not zero, we try to allocate that
* SPI. SPIs less than 255 are reserved, so we check for those too.
*/
u_int32_t
reserve_spi(u_int32_t tspi, struct in_addr src, u_int8_t proto, int *errval)
{
struct tdb *tdbp;
u_int32_t spi = tspi; /* Don't change */
while (1)
{
while (ntohl(spi) <= 255) /* Get a new SPI */
get_random_bytes((void *) &spi, sizeof(spi));
/* Check whether we're using this SPI already */
if (gettdb(spi, src, proto) != (struct tdb *) NULL)
{
if (tspi != 0) /* If one was proposed, report error */
{
(*errval) = EEXIST;
return 0;
}
spi = 0;
continue;
}
MALLOC(tdbp, struct tdb *, sizeof(*tdbp), M_TDB, M_WAITOK);
if (tdbp == NULL)
{
(*errval) = ENOBUFS;
return 0;
}
bzero((caddr_t) tdbp, sizeof(*tdbp));
tdbp->tdb_spi = spi;
tdbp->tdb_dst = src;
tdbp->tdb_sproto = proto;
tdbp->tdb_flags |= TDBF_INVALID;
tdbp->tdb_epoch = kernfs_epoch - 1;
puttdb(tdbp);
return spi;
}
}
/*
* An IPSP SAID is really the concatenation of the SPI found in the
* packet, the destination address of the packet and the IPsec protocol.
* When we receive an IPSP packet, we need to look up its tunnel descriptor
* block, based on the SPI in the packet and the destination address (which
* is really one of our addresses if we received the packet!
*/
struct tdb *
gettdb(u_int32_t spi, struct in_addr dst, u_int8_t proto)
{
int hashval;
struct tdb *tdbp;
hashval = (spi + dst.s_addr + proto) % TDB_HASHMOD;
for (tdbp = tdbh[hashval]; tdbp; tdbp = tdbp->tdb_hnext)
if ((tdbp->tdb_spi == spi) && (tdbp->tdb_dst.s_addr == dst.s_addr)
&& (tdbp->tdb_sproto == proto))
break;
return tdbp;
}
struct flow *
get_flow(void)
{
struct flow *flow;
MALLOC(flow, struct flow *, sizeof(struct flow), M_TDB, M_WAITOK);
if (flow == (struct flow *) NULL)
return (struct flow *) NULL;
bzero(flow, sizeof(struct flow));
return flow;
}
struct expiration *
get_expiration(void)
{
struct expiration *exp;
MALLOC(exp, struct expiration *, sizeof(struct expiration), M_TDB,
M_WAITOK);
if (exp == (struct expiration *) NULL)
return (struct expiration *) NULL;
bzero(exp, sizeof(struct expiration));
return exp;
}
void
cleanup_expirations(struct in_addr dst, u_int32_t spi, u_int8_t sproto)
{
struct expiration *exp, *nexp;
for (exp = explist; exp; exp = exp ? exp->exp_next : explist)
if ((exp->exp_dst.s_addr == dst.s_addr) &&
(exp->exp_spi == spi) && (exp->exp_sproto == sproto))
{
/* Link previous to next */
if (exp->exp_prev == (struct expiration *) NULL)
explist = exp->exp_next;
else
exp->exp_prev->exp_next = exp->exp_next;
/* Link next (if it exists) to previous */
if (exp->exp_next != (struct expiration *) NULL)
exp->exp_next->exp_prev = exp->exp_prev;
nexp = exp;
exp = exp->exp_prev;
free(nexp, M_TDB);
}
}
void
handle_expirations(void *arg)
{
struct expiration *exp;
struct tdb *tdb;
if (explist == (struct expiration *) NULL)
return;
while (1)
{
exp = explist;
if (exp == (struct expiration *) NULL)
return;
else
if (exp->exp_timeout > time.tv_sec)
break;
/* Advance pointer */
explist = explist->exp_next;
if (explist)
explist->exp_prev = NULL;
tdb = gettdb(exp->exp_spi, exp->exp_dst, exp->exp_sproto);
if (tdb == (struct tdb *) NULL)
{
free(exp, M_TDB);
continue; /* TDB is gone, ignore this */
}
/* Soft expirations */
if (tdb->tdb_flags & TDBF_SOFT_TIMER)
{
if (tdb->tdb_soft_timeout <= time.tv_sec)
{
encap_sendnotify(NOTIFY_SOFT_EXPIRE, tdb, NULL);
tdb->tdb_flags &= ~TDBF_SOFT_TIMER;
}
else
if (tdb->tdb_flags & TDBF_SOFT_FIRSTUSE)
if (tdb->tdb_first_use + tdb->tdb_soft_first_use <=
time.tv_sec)
{
encap_sendnotify(NOTIFY_SOFT_EXPIRE, tdb, NULL);
tdb->tdb_flags &= ~TDBF_SOFT_FIRSTUSE;
}
}
/* Hard expirations */
if (tdb->tdb_flags & TDBF_TIMER)
{
if (tdb->tdb_exp_timeout <= time.tv_sec)
{
encap_sendnotify(NOTIFY_HARD_EXPIRE, tdb, NULL);
tdb_delete(tdb, 0);
}
else
if (tdb->tdb_flags & TDBF_FIRSTUSE)
if (tdb->tdb_first_use + tdb->tdb_exp_first_use <=
time.tv_sec)
{
encap_sendnotify(NOTIFY_HARD_EXPIRE, tdb, NULL);
tdb_delete(tdb, 0);
}
}
free(exp, M_TDB);
}
if (explist)
timeout(handle_expirations, (void *) NULL,
hz * (explist->exp_timeout - time.tv_sec));
}
void
put_expiration(struct expiration *exp)
{
struct expiration *expt;
int reschedflag = 0;
if (exp == (struct expiration *) NULL)
{
DPRINTF(("put_expiration(): NULL argument\n"));
return;
}
if (explist == (struct expiration *) NULL)
{
explist = exp;
reschedflag = 1;
}
else
if (explist->exp_timeout > exp->exp_timeout)
{
exp->exp_next = explist;
explist->exp_prev = exp;
explist = exp;
reschedflag = 2;
}
else
{
for (expt = explist; expt->exp_next; expt = expt->exp_next)
if (expt->exp_next->exp_timeout > exp->exp_timeout)
{
expt->exp_next->exp_prev = exp;
exp->exp_next = expt->exp_next;
expt->exp_next = exp;
exp->exp_prev = expt;
break;
}
if (expt->exp_next == (struct expiration *) NULL)
{
expt->exp_next = exp;
exp->exp_prev = expt;
}
}
switch (reschedflag)
{
case 1:
timeout(handle_expirations, (void *) NULL,
hz * (explist->exp_timeout - time.tv_sec));
break;
case 2:
untimeout(handle_expirations, (void *) NULL);
timeout(handle_expirations, (void *) NULL,
hz * (explist->exp_timeout - time.tv_sec));
break;
default:
break;
}
}
struct flow *
find_flow(struct in_addr src, struct in_addr srcmask, struct in_addr dst,
struct in_addr dstmask, u_int8_t proto, u_int16_t sport,
u_int16_t dport, struct tdb *tdb)
{
struct flow *flow;
for (flow = tdb->tdb_flow; flow; flow = flow->flow_next)
if ((src.s_addr == flow->flow_src.s_addr) &&
(dst.s_addr == flow->flow_dst.s_addr) &&
(srcmask.s_addr == flow->flow_srcmask.s_addr) &&
(dstmask.s_addr == flow->flow_dstmask.s_addr) &&
(proto == flow->flow_proto) &&
(sport == flow->flow_sport) && (dport == flow->flow_dport))
return flow;
return (struct flow *) NULL;
}
struct flow *
find_global_flow(struct in_addr src, struct in_addr srcmask,
struct in_addr dst, struct in_addr dstmask,
u_int8_t proto, u_int16_t sport, u_int16_t dport)
{
struct flow *flow;
struct tdb *tdb;
int i;
for (i = 0; i < TDB_HASHMOD; i++)
for (tdb = tdbh[i]; tdb; tdb = tdb->tdb_hnext)
if ((flow = find_flow(src, srcmask, dst, dstmask, proto, sport,
dport, tdb)) != (struct flow *) NULL)
return flow;
return (struct flow *) NULL;
}
void
puttdb(struct tdb *tdbp)
{
int hashval;
hashval = ((tdbp->tdb_sproto + tdbp->tdb_spi + tdbp->tdb_dst.s_addr)
% TDB_HASHMOD);
tdbp->tdb_hnext = tdbh[hashval];
tdbh[hashval] = tdbp;
}
void
put_flow(struct flow *flow, struct tdb *tdb)
{
flow->flow_next = tdb->tdb_flow;
flow->flow_prev = (struct flow *) NULL;
tdb->tdb_flow = flow;
flow->flow_sa = tdb;
if (flow->flow_next)
flow->flow_next->flow_prev = flow;
}
void
delete_flow(struct flow *flow, struct tdb *tdb)
{
if (tdb->tdb_flow == flow)
{
tdb->tdb_flow = flow->flow_next;
if (tdb->tdb_flow)
tdb->tdb_flow->flow_prev = (struct flow *) NULL;
}
else
{
flow->flow_prev->flow_next = flow->flow_next;
if (flow->flow_next)
flow->flow_next->flow_prev = flow->flow_prev;
}
FREE(flow, M_TDB);
}
int
tdb_delete(struct tdb *tdbp, int delchain)
{
struct tdb *tdbpp;
struct flow *flow;
int hashval;
hashval = ((tdbp->tdb_sproto + tdbp->tdb_spi + tdbp->tdb_dst.s_addr)
% TDB_HASHMOD);
if (tdbh[hashval] == tdbp)
{
tdbpp = tdbp;
tdbh[hashval] = tdbp->tdb_hnext;
}
else
for (tdbpp = tdbh[hashval]; tdbpp != NULL; tdbpp = tdbpp->tdb_hnext)
if (tdbpp->tdb_hnext == tdbp)
{
tdbpp->tdb_hnext = tdbp->tdb_hnext;
tdbpp = tdbp;
}
if (tdbp != tdbpp)
return EINVAL; /* Should never happen */
/* If there was something before us in the chain, make it point nowhere */
if (tdbp->tdb_inext)
tdbp->tdb_inext->tdb_onext = NULL;
/* If there was something after us in the chain, make it point nowhere */
if (tdbp->tdb_onext)
tdbp->tdb_onext->tdb_inext = NULL;
tdbpp = tdbp->tdb_onext;
if (tdbp->tdb_xform)
(*(tdbp->tdb_xform->xf_zeroize))(tdbp);
for (flow = tdbp->tdb_flow; flow; flow = tdbp->tdb_flow)
delete_flow(flow, tdbp);
cleanup_expirations(tdbp->tdb_dst, tdbp->tdb_spi, tdbp->tdb_sproto);
FREE(tdbp, M_TDB);
if (delchain && tdbpp)
return tdb_delete(tdbpp, delchain);
else
return 0;
}
int
tdb_init(struct tdb *tdbp, struct mbuf *m)
{
int alg;
struct encap_msghdr *em;
struct xformsw *xsp;
em = mtod(m, struct encap_msghdr *);
alg = em->em_alg;
/* Record establishment time */
tdbp->tdb_established = time.tv_sec;
tdbp->tdb_epoch = kernfs_epoch - 1;
for (xsp = xformsw; xsp < xformswNXFORMSW; xsp++)
if (xsp->xf_type == alg)
return (*(xsp->xf_init))(tdbp, xsp, m);
DPRINTF(("tdb_init(): no alg %d for spi %08x, addr %x, proto %d\n",
alg, ntohl(tdbp->tdb_spi), tdbp->tdb_dst.s_addr, tdbp->tdb_sproto));
return EINVAL;
}
/*
* Used by kernfs
*/
int
ipsp_kern(int off, char **bufp, int len)
{
static char buffer[IPSEC_KERNFS_BUFSIZE];
struct tdb *tdb;
struct flow *fl;
int l, i;
if (off == 0)
kernfs_epoch++;
if (bufp == NULL)
return 0;
bzero(buffer, IPSEC_KERNFS_BUFSIZE);
*bufp = buffer;
for (i = 0; i < TDB_HASHMOD; i++)
for (tdb = tdbh[i]; tdb; tdb = tdb->tdb_hnext)
if (tdb->tdb_epoch != kernfs_epoch)
{
tdb->tdb_epoch = kernfs_epoch;
l = sprintf(buffer, "SPI = %08x, Destination = %s, Sproto = %u\n",
ntohl(tdb->tdb_spi), inet_ntoa(tdb->tdb_dst),
tdb->tdb_sproto);
l += sprintf(buffer + l, "\testablished %d seconds ago\n",
time.tv_sec - tdb->tdb_established);
l += sprintf(buffer + l, "\tsrc = %s, flags = %08x, SAtype = %u\n",
inet_ntoa(tdb->tdb_src), tdb->tdb_flags,
tdb->tdb_satype);
if (tdb->tdb_xform)
l += sprintf(buffer + l, "\txform = <%s>\n",
tdb->tdb_xform->xf_name);
else
l += sprintf(buffer + l, "\txform = <(null)>\n");
if (tdb->tdb_confname)
l += sprintf(buffer + l, "\t\tencryption = <%s>\n",
tdb->tdb_confname);
if (tdb->tdb_authname)
l += sprintf(buffer + l, "\t\tauthentication = <%s>\n",
tdb->tdb_authname);
l += sprintf(buffer + l, "\tOSrc = %s", inet_ntoa(tdb->tdb_osrc));
l += sprintf(buffer + l, " ODst = %s, TTL = %u\n",
inet_ntoa(tdb->tdb_odst), tdb->tdb_ttl);
if (tdb->tdb_onext)
l += sprintf(buffer + l,
"\tNext (on output) SA: SPI = %08x, "
"Destination = %s, Sproto = %u\n",
ntohl(tdb->tdb_onext->tdb_spi),
inet_ntoa(tdb->tdb_onext->tdb_dst),
tdb->tdb_onext->tdb_sproto);
if (tdb->tdb_inext)
l += sprintf(buffer + l,
"\tNext (on input) SA: SPI = %08x, "
"Destination = %s, Sproto = %u\n",
ntohl(tdb->tdb_inext->tdb_spi),
inet_ntoa(tdb->tdb_inext->tdb_dst),
tdb->tdb_inext->tdb_sproto);
/* XXX We can reuse variable i, we're not going to loop again */
for (i = 0, fl = tdb->tdb_flow; fl; fl = fl->flow_next)
i++;
l += sprintf(buffer + l,
"\t%u flows counted "
"(use netstat -r for more information)\n",
i);
l += sprintf(buffer + l, "\tExpirations:\n");
if (tdb->tdb_flags & TDBF_TIMER)
l += sprintf(buffer + l,
"\t\tHard expiration(1) in %qu seconds\n",
tdb->tdb_exp_timeout - time.tv_sec);
if (tdb->tdb_flags & TDBF_SOFT_TIMER)
l += sprintf(buffer + l,
"\t\tSoft expiration(1) in %qu seconds\n",
tdb->tdb_soft_timeout - time.tv_sec);
if (tdb->tdb_flags & TDBF_BYTES)
l += sprintf(buffer + l, "\t\tHard expiration after %qu bytes\n",
tdb->tdb_exp_bytes);
if (tdb->tdb_flags & TDBF_SOFT_BYTES)
l += sprintf(buffer + l, "\t\tSoft expiration after %qu bytes\n",
tdb->tdb_soft_bytes);
l += sprintf(buffer + l, "\t\tCurrently %qu bytes processed\n",
tdb->tdb_cur_bytes);
if (tdb->tdb_flags & TDBF_PACKETS)
l += sprintf(buffer + l,
"\t\tHard expiration after %qu packets\n",
tdb->tdb_exp_packets);
if (tdb->tdb_flags & TDBF_SOFT_PACKETS)
l += sprintf(buffer + l,
"\t\tSoft expiration after %qu packets\n",
tdb->tdb_soft_packets);
l += sprintf(buffer + l, "\t\tCurrently %qu packets processed\n",
tdb->tdb_cur_packets);
if (tdb->tdb_flags & TDBF_FIRSTUSE) {
if (tdb->tdb_first_use)
l += sprintf(buffer + l,
"\t\tHard expiration(2) in %qu seconds\n",
(tdb->tdb_first_use + tdb->tdb_exp_first_use) -
time.tv_sec);
else
l += sprintf(buffer + l,
"\t\tHard expiration in %qu seconds after first "
"use\n", tdb->tdb_exp_first_use);
}
if (tdb->tdb_flags & TDBF_SOFT_FIRSTUSE) {
if (tdb->tdb_first_use)
l += sprintf(buffer + l,
"\t\tSoft expiration(2) in %qu seconds\n",
(tdb->tdb_first_use + tdb->tdb_soft_first_use) -
time.tv_sec);
else
l += sprintf(buffer + l,
"\t\tSoft expiration in %qu seconds after first "
"use\n", tdb->tdb_soft_first_use);
}
if (!(tdb->tdb_flags & (TDBF_TIMER | TDBF_SOFT_TIMER | TDBF_BYTES |
TDBF_SOFT_PACKETS | TDBF_PACKETS |
TDBF_SOFT_BYTES | TDBF_FIRSTUSE |
TDBF_SOFT_FIRSTUSE)))
l += sprintf(buffer + l, "\t\t(none)\n");
l += sprintf(buffer + l, "\n");
return l;
}
return 0;
}
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