#include "config.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <netinet/in.h>
#ifdef HAVE_NETINET6_IPSEC
# include <netinet6/ipsec.h>
#else
# include <netinet/ipsec.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "var.h"
#include "misc.h"
#include "vmbuf.h"
#include "plog.h"
#include "sockmisc.h"
#include "debug.h"
#include "localconf.h"
#include "isakmp_var.h"
#include "isakmp.h"
#include "ipsec_doi.h"
#include "oakley.h"
#include "handler.h"
#include "algorithm.h"
#include "sainfo.h"
#include "gcmalloc.h"
static LIST_HEAD(_sitree, sainfo) sitree;
struct sainfo *
getsainfo(const vchar_t *src, const vchar_t *dst, const vchar_t *peer, int use_nat_addr)
{
struct sainfo *s = NULL;
struct sainfo *anonymous = NULL;
int pass = 1;
if (use_nat_addr && lcconf->ext_nat_id == NULL)
return NULL;
if (peer == NULL)
pass = 2;
again:
LIST_FOREACH(s, &sitree, chain) {
if (s->id_i != NULL) {
if (pass == 2)
continue;
if (memcmp(peer->v, s->id_i->v, s->id_i->l) != 0)
continue;
} else if (pass == 1)
continue;
if (s->idsrc == NULL) {
anonymous = s;
continue;
}
if (src == NULL) {
if (anonymous != NULL)
break;
continue;
}
if ((src->l == s->idsrc->l) && memcmp(src->v, s->idsrc->v, s->idsrc->l) == 0) {
if (use_nat_addr) {
if (memcmp(lcconf->ext_nat_id->v, s->iddst->v, s->iddst->l) == 0) {
plogdump(ASL_LEVEL_DEBUG, lcconf->ext_nat_id->v, lcconf->ext_nat_id->l, "matched external nat address.\n");
return s;
}
} else if ((dst->l == s->iddst->l) && memcmp(dst->v, s->iddst->v, s->iddst->l) == 0) {
return s;
}
}
}
if (anonymous) {
plog(ASL_LEVEL_DEBUG,
"anonymous sainfo selected.\n");
} else if (pass == 1) {
pass = 2;
goto again;
}
return anonymous;
}
struct sainfo *
getsainfo_by_dst_id(const vchar_t *dst, const vchar_t *peer)
{
struct sainfo *s = NULL;
struct sainfo *anonymous = NULL;
plog(ASL_LEVEL_DEBUG, "getsainfo_by_dst_id - dst id:\n");
if (dst != NULL)
plogdump(ASL_LEVEL_DEBUG, dst->v, dst->l, "getsainfo_by_dst_id - dst id:\n");
else
return NULL;
LIST_FOREACH(s, &sitree, chain) {
if (s->idsrc != NULL) {
plogdump(ASL_LEVEL_DEBUG, s->idsrc->v, s->idsrc->l, "getsainfo_by_dst_id - sainfo id - src:\n");
plogdump(ASL_LEVEL_DEBUG, s->iddst->v, s->iddst->l, "getsainfo_by_dst_id - sainfo id - dst:\n");
} else {
plog(ASL_LEVEL_DEBUG, "getsainfo_by_dst_id - sainfo id = anonymous\n");
}
if (s->id_i != NULL) {
plogdump(ASL_LEVEL_DEBUG, s->id_i->v, s->id_i->l, "getsainfo_by_dst_id - sainfo id_i:\n");
if (peer == NULL)
continue;
if (memcmp(peer->v, s->id_i->v, s->id_i->l) != 0)
continue;
}
if (s->idsrc == NULL) {
anonymous = s;
continue;
}
if (memcmp(dst->v, s->iddst->v, s->iddst->l) == 0)
return s;
}
if (anonymous) {
plog(ASL_LEVEL_DEBUG,
"anonymous sainfo selected.\n");
}
return anonymous;
}
struct sainfo *
create_sainfo()
{
struct sainfo *new;
new = racoon_calloc(1, sizeof(*new));
if (new == NULL)
return NULL;
new->lifetime = IPSECDOI_ATTR_SA_LD_SEC_DEFAULT;
new->lifebyte = IPSECDOI_ATTR_SA_LD_KB_MAX;
new->refcount = 1;
new->in_list = 0;
return new;
}
void
delsainfo(struct sainfo *si)
{
int i;
for (i = 0; i < MAXALGCLASS; i++)
delsainfoalg(si->algs[i]);
if (si->idsrc)
vfree(si->idsrc);
if (si->iddst)
vfree(si->iddst);
#ifdef ENABLE_HYBRID
if (si->group)
vfree(si->group);
#endif
racoon_free(si);
}
void
inssainfo(struct sainfo *new)
{
LIST_INSERT_HEAD(&sitree, new, chain);
new->in_list = 1;
}
void
remsainfo(struct sainfo *si)
{
if (si->in_list) {
LIST_REMOVE(si, chain);
si->in_list = 0;
}
}
void
flushsainfo()
{
struct sainfo *s, *next;
LIST_FOREACH_SAFE(s, &sitree, chain, next) {
if (s->dynamic == 0) {
remsainfo(s);
if (--(s->refcount) <= 0)
delsainfo(s);
}
}
}
void
flushsainfo_dynamic(u_int32_t addr)
{
struct sainfo *s, *next;
LIST_FOREACH_SAFE(s, &sitree, chain, next) {
if (s->dynamic == addr) {
remsainfo(s);
if (--(s->refcount) <= 0)
delsainfo(s);
}
}
}
void
retain_sainfo(struct sainfo *si)
{
(si->refcount)++;
}
void
release_sainfo(struct sainfo *si)
{
if (--(si->refcount) <= 0) {
remsainfo(si);
delsainfo(si);
}
}
void
initsainfo()
{
LIST_INIT(&sitree);
}
struct sainfoalg *
newsainfoalg()
{
struct sainfoalg *new;
new = racoon_calloc(1, sizeof(*new));
if (new == NULL)
return NULL;
return new;
}
void
delsainfoalg(struct sainfoalg *alg)
{
struct sainfoalg *a, *next;
for (a = alg; a; a = next) {
next = a->next;
racoon_free(a);
}
}
void
inssainfoalg(struct sainfoalg **head, struct sainfoalg *new)
{
struct sainfoalg *a;
for (a = *head; a && a->next; a = a->next)
;
if (a)
a->next = new;
else
*head = new;
}
const char *
sainfo2str(const struct sainfo *si)
{
char *idsrc_str;
char *iddst_str;
char *idi_str;
static char buf[256];
if (si->idsrc == NULL)
snprintf(buf, sizeof(buf), "anonymous");
else {
idsrc_str = ipsecdoi_id2str(si->idsrc);
if (idsrc_str) {
snprintf(buf, sizeof(buf), "%s", idsrc_str);
racoon_free(idsrc_str);
}
if (si->iddst == NULL) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " anonymous");
} else {
iddst_str = ipsecdoi_id2str(si->iddst);
if (iddst_str) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
" %s", iddst_str);
racoon_free(iddst_str);
}
}
}
if (si->id_i != NULL) {
idi_str = ipsecdoi_id2str(si->id_i);
if (idi_str) {
snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
" from %s", idi_str);
racoon_free(idi_str);
}
}
return buf;
}