/*      $OpenBSD: ike.c,v 1.85 2025/04/30 03:54:09 tb Exp $     */
/*
 * Copyright (c) 2005 Hans-Joerg Hoexer <hshoexer@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>

#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "ipsecctl.h"

static void     ike_section_general(struct ipsec_rule *, FILE *);
static void     ike_section_peer(struct ipsec_rule *, FILE *);
static void     ike_section_ids(struct ipsec_rule *, FILE *);
static void     ike_section_ipsec(struct ipsec_rule *, FILE *);
static int      ike_section_p1(struct ipsec_rule *, FILE *);
static int      ike_section_p2(struct ipsec_rule *, FILE *);
static void     ike_section_p2ids(struct ipsec_rule *, FILE *);
static int      ike_connect(struct ipsec_rule *, FILE *);
static int      ike_gen_config(struct ipsec_rule *, FILE *);
static int      ike_delete_config(struct ipsec_rule *, FILE *);
static void     ike_setup_ids(struct ipsec_rule *);

int             ike_print_config(struct ipsec_rule *, int);
int             ike_ipsec_establish(int, struct ipsec_rule *, const char *);

#define SET     "C set "
#define ADD     "C add "
#define DELETE  "C rms "
#define RMV     "C rmv "

#define CONF_DFLT_DYNAMIC_DPD_CHECK_INTERVAL    5
#define CONF_DFLT_DYNAMIC_CHECK_INTERVAL        30

char *ike_id_types[] = {
        "", "", "IPV4_ADDR", "IPV6_ADDR", "FQDN", "USER_FQDN"
};

static void
ike_section_general(struct ipsec_rule *r, FILE *fd)
{
        if (r->ikemode == IKE_DYNAMIC) {
                fprintf(fd, SET "[General]:Check-interval=%d force\n",
                    CONF_DFLT_DYNAMIC_CHECK_INTERVAL);
                fprintf(fd, SET "[General]:DPD-check-interval=%d force\n",
                    CONF_DFLT_DYNAMIC_DPD_CHECK_INTERVAL);
        }
}

static void
ike_section_peer(struct ipsec_rule *r, FILE *fd)
{
        if (r->peer)
                fprintf(fd, SET "[Phase 1]:%s=%s force\n", r->peer->name,
                    r->p1name);
        else
                fprintf(fd, SET "[Phase 1]:Default=%s force\n", r->p1name);
        fprintf(fd, SET "[%s]:Phase=1 force\n", r->p1name);
        if (r->peer)
                fprintf(fd, SET "[%s]:Address=%s force\n", r->p1name,
                    r->peer->name);
        if (r->local)
                fprintf(fd, SET "[%s]:Local-address=%s force\n", r->p1name,
                    r->local->name);
        if (r->ikeauth->type == IKE_AUTH_PSK)
                fprintf(fd, SET "[%s]:Authentication=%s force\n", r->p1name,
                    r->ikeauth->string);
}

static void
ike_section_ids(struct ipsec_rule *r, FILE *fd)
{
        char myname[HOST_NAME_MAX+1];

        if (r->auth == NULL)
                return;

        if (r->ikemode == IKE_DYNAMIC && r->auth->srcid == NULL) {
                if (gethostname(myname, sizeof(myname)) == -1)
                        err(1, "ike_section_ids: gethostname");
                if ((r->auth->srcid = strdup(myname)) == NULL)
                        err(1, "ike_section_ids: strdup");
                r->auth->srcid_type = ID_FQDN;
        }
        if (r->auth->srcid) {
                fprintf(fd, SET "[%s]:ID=id-%s force\n", r->p1name,
                    r->auth->srcid);
                fprintf(fd, SET "[id-%s]:ID-type=%s force\n", r->auth->srcid,
                    ike_id_types[r->auth->srcid_type]);
                if (r->auth->srcid_type == ID_IPV4 ||
                    r->auth->srcid_type == ID_IPV6)
                        fprintf(fd, SET "[id-%s]:Address=%s force\n",
                            r->auth->srcid, r->auth->srcid);
                else
                        fprintf(fd, SET "[id-%s]:Name=%s force\n",
                            r->auth->srcid, r->auth->srcid);
        }
        if (r->auth->dstid) {
                fprintf(fd, SET "[%s]:Remote-ID=id-%s force\n", r->p1name,
                    r->auth->dstid);
                fprintf(fd, SET "[id-%s]:ID-type=%s force\n", r->auth->dstid,
                    ike_id_types[r->auth->dstid_type]);
                if (r->auth->dstid_type == ID_IPV4 ||
                    r->auth->dstid_type == ID_IPV6)
                        fprintf(fd, SET "[id-%s]:Address=%s force\n",
                            r->auth->dstid, r->auth->dstid);
                else
                        fprintf(fd, SET "[id-%s]:Name=%s force\n",
                            r->auth->dstid, r->auth->dstid);
        }
}

static void
ike_section_ipsec(struct ipsec_rule *r, FILE *fd)
{
        fprintf(fd, SET "[%s]:Phase=2 force\n", r->p2name);
        fprintf(fd, SET "[%s]:ISAKMP-peer=%s force\n", r->p2name, r->p1name);
        fprintf(fd, SET "[%s]:Configuration=phase2-%s force\n", r->p2name,
            r->p2name);
        fprintf(fd, SET "[%s]:Local-ID=%s force\n", r->p2name, r->p2lid);
        if (r->p2nid)
                fprintf(fd, SET "[%s]:NAT-ID=%s force\n", r->p2name, r->p2nid);
        fprintf(fd, SET "[%s]:Remote-ID=%s force\n", r->p2name, r->p2rid);

        if (r->tag)
                fprintf(fd, SET "[%s]:PF-Tag=%s force\n", r->p2name, r->tag);
        if (r->flags & IPSEC_RULE_F_IFACE) {
                fprintf(fd, SET "[%s]:Interface=%u force\n", r->p2name,
                    r->iface);
        }
}

static int
ike_section_p2(struct ipsec_rule *r, FILE *fd)
{
        char    *exchange_type, *key_length, *transform, *p;
        char    *enc_alg, *auth_alg, *group_desc, *encap;
        int     needauth = 1;
        int     num_print = 0;

        switch (r->p2ie) {
        case IKE_QM:
                exchange_type = "QUICK_MODE";
                break;
        default:
                warnx("illegal phase 2 ike mode %d", r->p2ie);
                return (-1);
        }

        fprintf(fd, SET "[phase2-%s]:EXCHANGE_TYPE=%s force\n", r->p2name,
            exchange_type);
        fprintf(fd, SET "[phase2-%s]:Suites=phase2-suite-%s force\n", r->p2name,
            r->p2name);

        fprintf(fd, SET "[phase2-suite-%s]:Protocols=phase2-protocol-%s "
            "force\n", r->p2name, r->p2name);

        fprintf(fd, SET "[phase2-protocol-%s]:PROTOCOL_ID=", r->p2name);

        switch (r->satype) {
        case IPSEC_ESP:
                fprintf(fd, "IPSEC_ESP");
                break;
        case IPSEC_AH:
                fprintf(fd, "IPSEC_AH");
                break;
        default:
                warnx("illegal satype %d", r->satype);
                return (-1);
        }
        fprintf(fd, " force\n");

        key_length = NULL;
        enc_alg = NULL;
        if (r->p2xfs && r->p2xfs->encxf) {
                if (r->satype == IPSEC_ESP) {
                        switch (r->p2xfs->encxf->id) {
                        case ENCXF_3DES_CBC:
                                enc_alg = "3DES";
                                break;
                        case ENCXF_AES:
                                enc_alg = "AES";
                                key_length = "128,128:256";
                                break;
                        case ENCXF_AES_128:
                                enc_alg = "AES";
                                key_length = "128,128:128";
                                break;
                        case ENCXF_AES_192:
                                enc_alg = "AES";
                                key_length = "192,192:192";
                                break;
                        case ENCXF_AES_256:
                                enc_alg = "AES";
                                key_length = "256,256:256";
                                break;
                        case ENCXF_AESCTR:
                                enc_alg = "AES_CTR";
                                key_length = "128,128:128";
                                break;
                        case ENCXF_AES_128_CTR:
                                enc_alg = "AES_CTR";
                                key_length = "128,128:128";
                                break;
                        case ENCXF_AES_192_CTR:
                                enc_alg = "AES_CTR";
                                key_length = "192,192:192";
                                break;
                        case ENCXF_AES_256_CTR:
                                enc_alg = "AES_CTR";
                                key_length = "256,256:256";
                                break;
                        case ENCXF_AES_128_GCM:
                                enc_alg = "AES_GCM_16";
                                key_length = "128,128:128";
                                needauth = 0;
                                break;
                        case ENCXF_AES_192_GCM:
                                enc_alg = "AES_GCM_16";
                                key_length = "192,192:192";
                                needauth = 0;
                                break;
                        case ENCXF_AES_256_GCM:
                                enc_alg = "AES_GCM_16";
                                key_length = "256,256:256";
                                needauth = 0;
                                break;
                        case ENCXF_AES_128_GMAC:
                                enc_alg = "AES_GMAC";
                                key_length = "128,128:128";
                                needauth = 0;
                                break;
                        case ENCXF_AES_192_GMAC:
                                enc_alg = "AES_GMAC";
                                key_length = "192,192:192";
                                needauth = 0;
                                break;
                        case ENCXF_AES_256_GMAC:
                                enc_alg = "AES_GMAC";
                                key_length = "256,256:256";
                                needauth = 0;
                                break;
                        case ENCXF_BLOWFISH:
                                enc_alg = "BLOWFISH";
                                key_length = "128,96:192";
                                break;
                        case ENCXF_CAST128:
                                enc_alg = "CAST";
                                break;
                        case ENCXF_NULL:
                                enc_alg = "NULL";
                                needauth = 0;
                                break;
                        default:
                                warnx("illegal transform %s",
                                    r->p2xfs->encxf->name);
                                return (-1);
                        }
                } else {
                        warnx("illegal transform %s", r->p2xfs->encxf->name);
                        return (-1);
                }
        } else if (r->satype == IPSEC_ESP) {
                enc_alg = "AES";
                key_length = "128,128:256";
        }

        switch (r->tmode) {
        case IPSEC_TUNNEL:
                encap = "TUNNEL";
                break;
        case IPSEC_TRANSPORT:
                encap = "TRANSPORT";
                break;
        default:
                warnx("illegal encapsulation mode %d", r->tmode);
                return (-1);
        }

        auth_alg = NULL;
        if (r->p2xfs && r->p2xfs->authxf) {
                switch (r->p2xfs->authxf->id) {
                case AUTHXF_HMAC_MD5:
                        auth_alg = "MD5";
                        break;
                case AUTHXF_HMAC_SHA1:
                        auth_alg = "SHA";
                        break;
                case AUTHXF_HMAC_RIPEMD160:
                        auth_alg = "RIPEMD";
                        break;
                case AUTHXF_HMAC_SHA2_256:
                        auth_alg = "SHA2_256";
                        break;
                case AUTHXF_HMAC_SHA2_384:
                        auth_alg = "SHA2_384";
                        break;
                case AUTHXF_HMAC_SHA2_512:
                        auth_alg = "SHA2_512";
                        break;
                default:
                        warnx("illegal transform %s", r->p2xfs->authxf->name);
                        return (-1);
                }
        } else if (needauth)
                auth_alg = "SHA2_256";

        group_desc = NULL;
        if (r->p2xfs && r->p2xfs->groupxf) {
                switch (r->p2xfs->groupxf->id) {
                case GROUPXF_NONE:
                        break;
                case GROUPXF_1:
                        group_desc = "MODP_768";
                        break;
                case GROUPXF_2:
                        group_desc = "MODP_1024";
                        break;
                case GROUPXF_5:
                        group_desc = "MODP_1536";
                        break;
                case GROUPXF_14:
                        group_desc = "MODP_2048";
                        break;
                case GROUPXF_15:
                        group_desc = "MODP_3072";
                        break;
                case GROUPXF_16:
                        group_desc = "MODP_4096";
                        break;
                case GROUPXF_17:
                        group_desc = "MODP_6144";
                        break;
                case GROUPXF_18:
                        group_desc = "MODP_8192";
                        break;
                case GROUPXF_19:
                        group_desc = "ECP_256";
                        break;
                case GROUPXF_20:
                        group_desc = "ECP_384";
                        break;
                case GROUPXF_21:
                        group_desc = "ECP_521";
                        break;
                case GROUPXF_26:
                        group_desc = "ECP_224";
                        break;
                case GROUPXF_27:
                        group_desc = "BP_224";
                        break;
                case GROUPXF_28:
                        group_desc = "BP_256";
                        break;
                case GROUPXF_29:
                        group_desc = "BP_384";
                        break;
                case GROUPXF_30:
                        group_desc = "BP_512";
                        break;
                default:
                        warnx("illegal group %s", r->p2xfs->groupxf->name);
                        return (-1);
                }
        } else
                group_desc = "MODP_3072";

        /* the transform name must not include "," */
        if (key_length && (p = strchr(key_length, ',')) != NULL)
                num_print = p - key_length;
        /*
         * create a unique transform name, otherwise we cannot have
         * multiple transforms per p2name.
         */
        if (asprintf(&transform, "phase2-transform-%s-%s%.*s-%s-%s-%s",
            r->p2name,
            enc_alg ? enc_alg : "NONE",
            num_print, key_length ? key_length : "",
            auth_alg ? auth_alg : "NONE",
            group_desc ? group_desc : "NONE",
            encap) == -1)
                errx(1, "asprintf phase2-transform");

        fprintf(fd, SET "[phase2-protocol-%s]:Transforms=%s force\n",
            r->p2name, transform);

        fprintf(fd, SET "[%s]:TRANSFORM_ID=%s force\n", transform,
            r->satype == IPSEC_AH ?  auth_alg : enc_alg);
        if (key_length)
                fprintf(fd, SET "[%s]:KEY_LENGTH=%s force\n", transform,
                    key_length);
        fprintf(fd, SET "[%s]:ENCAPSULATION_MODE=%s force\n", transform, encap);
        if (auth_alg)
                fprintf(fd, SET "[%s]:AUTHENTICATION_ALGORITHM=HMAC_%s force\n",
                    transform, auth_alg);
        if (group_desc)
                fprintf(fd, SET "[%s]:GROUP_DESCRIPTION=%s force\n", transform,
                    group_desc);

        if (r->p2life && r->p2life->lt_seconds != -1) {
                fprintf(fd, SET "[%s]:Life=%s-life force\n",
                    transform, transform);
                fprintf(fd, SET "[%s-life]:LIFE_TYPE=SECONDS force\n",
                    transform);
                fprintf(fd, SET "[%s-life]:LIFE_DURATION=%d force\n",
                    transform, r->p2life->lt_seconds);
        } else
                fprintf(fd, SET "[%s]:Life=LIFE_QUICK_MODE force\n",
                    transform);

        free(transform);
        return (0);
}

static int
ike_section_p1(struct ipsec_rule *r, FILE *fd)
{
        char    *exchange_type, *key_length, *transform, *p;
        char    *enc_alg, *auth_alg, *group_desc, *auth_method;
        int     num_print = 0;

        switch (r->p1ie) {
        case IKE_MM:
                exchange_type = "ID_PROT";
                break;
        case IKE_AM:
                exchange_type = "AGGRESSIVE";
                break;
        default:
                warnx("illegal phase 1 ike mode %d", r->p1ie);
                return (-1);
        }

        fprintf(fd, SET "[%s]:Configuration=phase1-%s force\n", r->p1name,
            r->p1name);
        fprintf(fd, SET "[phase1-%s]:EXCHANGE_TYPE=%s force\n", r->p1name,
            exchange_type);

        key_length = NULL;
        if (r->p1xfs && r->p1xfs->encxf) {
                switch (r->p1xfs->encxf->id) {
                case ENCXF_3DES_CBC:
                        enc_alg = "3DES";
                        break;
                case ENCXF_AES:
                        enc_alg = "AES";
                        key_length = "128,128:256";
                        break;
                case ENCXF_AES_128:
                        enc_alg = "AES";
                        key_length = "128,128:128";
                        break;
                case ENCXF_AES_192:
                        enc_alg = "AES";
                        key_length = "192,192:192";
                        break;
                case ENCXF_AES_256:
                        enc_alg = "AES";
                        key_length = "256,256:256";
                        break;
                case ENCXF_BLOWFISH:
                        enc_alg = "BLOWFISH";
                        key_length = "128,96:192";
                        break;
                case ENCXF_CAST128:
                        enc_alg = "CAST";
                        break;
                default:
                        warnx("illegal transform %s", r->p1xfs->encxf->name);
                        return (-1);
                }
        } else {
                enc_alg = "AES";
                key_length = "128,128:256";
        }

        if (r->p1xfs && r->p1xfs->authxf) {
                switch (r->p1xfs->authxf->id) {
                case AUTHXF_HMAC_MD5:
                        auth_alg = "MD5";
                        break;
                case AUTHXF_HMAC_SHA1:
                        auth_alg = "SHA";
                        break;
                case AUTHXF_HMAC_SHA2_256:
                        auth_alg = "SHA2_256";
                        break;
                case AUTHXF_HMAC_SHA2_384:
                        auth_alg = "SHA2_384";
                        break;
                case AUTHXF_HMAC_SHA2_512:
                        auth_alg = "SHA2_512";
                        break;
                default:
                        warnx("illegal transform %s", r->p1xfs->authxf->name);
                        return (-1);
                }
        } else
                auth_alg = "SHA";

        if (r->p1xfs && r->p1xfs->groupxf) {
                switch (r->p1xfs->groupxf->id) {
                case GROUPXF_1:
                        group_desc = "MODP_768";
                        break;
                case GROUPXF_2:
                        group_desc = "MODP_1024";
                        break;
                case GROUPXF_5:
                        group_desc = "MODP_1536";
                        break;
                case GROUPXF_14:
                        group_desc = "MODP_2048";
                        break;
                case GROUPXF_15:
                        group_desc = "MODP_3072";
                        break;
                case GROUPXF_16:
                        group_desc = "MODP_4096";
                        break;
                case GROUPXF_17:
                        group_desc = "MODP_6144";
                        break;
                case GROUPXF_18:
                        group_desc = "MODP_8192";
                        break;
                case GROUPXF_19:
                        group_desc = "ECP_256";
                        break;
                case GROUPXF_20:
                        group_desc = "ECP_384";
                        break;
                case GROUPXF_21:
                        group_desc = "ECP_521";
                        break;
                case GROUPXF_26:
                        group_desc = "ECP_224";
                        break;
                case GROUPXF_27:
                        group_desc = "BP_224";
                        break;
                case GROUPXF_28:
                        group_desc = "BP_256";
                        break;
                case GROUPXF_29:
                        group_desc = "BP_384";
                        break;
                case GROUPXF_30:
                        group_desc = "BP_512";
                        break;
                default:
                        warnx("illegal group %s", r->p1xfs->groupxf->name);
                        return (-1);
                }
        } else
                group_desc = "MODP_3072";

        switch (r->ikeauth->type) {
        case IKE_AUTH_PSK:
                auth_method = "PRE_SHARED";
                break;
        case IKE_AUTH_RSA:
                auth_method = "RSA_SIG";
                break;
        default:
                warnx("illegal authentication method %u", r->ikeauth->type);
                return (-1);
        }

        /* the transform name must not include "," */
        if (key_length && (p = strchr(key_length, ',')) != NULL)
                num_print = p - key_length;
        /* create unique name for transform, see also ike_section_p2() */
        if (asprintf(&transform, "phase1-transform-%s-%s-%s-%s%.*s-%s",
            r->p1name, auth_method, auth_alg, enc_alg,
            num_print, key_length ? key_length : "",
            group_desc) == -1)
                errx(1, "asprintf phase1-transform");

        fprintf(fd, ADD "[phase1-%s]:Transforms=%s force\n", r->p1name,
            transform);
        fprintf(fd, SET "[%s]:AUTHENTICATION_METHOD=%s force\n", transform,
            auth_method);
        fprintf(fd, SET "[%s]:HASH_ALGORITHM=%s force\n", transform, auth_alg);
        fprintf(fd, SET "[%s]:ENCRYPTION_ALGORITHM=%s_CBC force\n", transform,
            enc_alg);
        if (key_length)
                fprintf(fd, SET "[%s]:KEY_LENGTH=%s force\n", transform,
                    key_length);
        fprintf(fd, SET "[%s]:GROUP_DESCRIPTION=%s force\n", transform,
            group_desc);

        if (r->p1life && r->p1life->lt_seconds != -1) {
                fprintf(fd, SET "[%s]:Life=%s-life force\n",
                    transform, transform);
                fprintf(fd, SET "[%s-life]:LIFE_TYPE=SECONDS force\n",
                    transform);
                fprintf(fd, SET "[%s-life]:LIFE_DURATION=%d force\n",
                    transform, r->p1life->lt_seconds);
        } else
                fprintf(fd, SET "[%s]:Life=LIFE_MAIN_MODE force\n", transform);

        free(transform);
        return (0);
}

static void
ike_section_p2ids_net(struct ipsec_addr *iamask, sa_family_t af, char *name,
    char *p2xid, FILE *fd)
{
        char mask[NI_MAXHOST], *network, *p;
        struct sockaddr_storage sas;
        struct sockaddr *sa = (struct sockaddr *)&sas;

        bzero(&sas, sizeof(struct sockaddr_storage));
        bzero(mask, sizeof(mask));
        sa->sa_family = af;
        switch (af) {
        case AF_INET:
                sa->sa_len = sizeof(struct sockaddr_in);
                bcopy(&iamask->ipa,
                    &((struct sockaddr_in *)(sa))->sin_addr,
                    sizeof(struct in_addr));
                break;
        case AF_INET6:
                sa->sa_len = sizeof(struct sockaddr_in6);
                bcopy(&iamask->ipa,
                    &((struct sockaddr_in6 *)(sa))->sin6_addr,
                    sizeof(struct in6_addr));
                break;
        }
        if (getnameinfo(sa, sa->sa_len, mask, sizeof(mask), NULL, 0,
            NI_NUMERICHOST))
                errx(1, "could not get a numeric mask");

        if ((network = strdup(name)) == NULL)
                err(1, "ike_section_p2ids: strdup");
        if ((p = strrchr(network, '/')) != NULL)
                *p = '\0';

        fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR_SUBNET force\n",
            p2xid, ((af == AF_INET) ? 4 : 6));
        fprintf(fd, SET "[%s]:Network=%s force\n", p2xid, network);
        fprintf(fd, SET "[%s]:Netmask=%s force\n", p2xid, mask);

        free(network);
}

static void
ike_section_p2ids(struct ipsec_rule *r, FILE *fd)
{
        char *p;
        struct ipsec_addr_wrap *src = r->src;
        struct ipsec_addr_wrap *dst = r->dst;

        if (src->netaddress) {
                ike_section_p2ids_net(&src->mask, src->af, src->name,
                    r->p2lid, fd);
        } else {
                fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR force\n",
                    r->p2lid, ((src->af == AF_INET) ? 4 : 6));
                if ((p = strrchr(src->name, '/')) != NULL)
                        *p = '\0';
                fprintf(fd, SET "[%s]:Address=%s force\n", r->p2lid,
                    src->name);
        }

        if (src->srcnat && src->srcnat->netaddress) {
                ike_section_p2ids_net(&src->srcnat->mask, src->af, src->srcnat->name,
                    r->p2nid, fd);
        } else if (src->srcnat) {
                fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR force\n",
                    r->p2nid, ((src->af == AF_INET) ? 4 : 6));
                if ((p = strrchr(src->srcnat->name, '/')) != NULL)
                        *p = '\0';
                fprintf(fd, SET "[%s]:Address=%s force\n", r->p2nid,
                    src->srcnat->name);
        }

        if (dst->netaddress) {
                ike_section_p2ids_net(&dst->mask, dst->af, dst->name,
                    r->p2rid, fd);
        } else {
                fprintf(fd, SET "[%s]:ID-type=IPV%d_ADDR force\n",
                    r->p2rid, ((dst->af == AF_INET) ? 4 : 6));
                if ((p = strrchr(dst->name, '/')) != NULL)
                        *p = '\0';
                fprintf(fd, SET "[%s]:Address=%s force\n", r->p2rid,
                    dst->name);
        }
        if (r->proto) {
                fprintf(fd, SET "[%s]:Protocol=%d force\n",
                    r->p2lid, r->proto);
                fprintf(fd, SET "[%s]:Protocol=%d force\n",
                    r->p2rid, r->proto);
        }
        if (r->sport)
                fprintf(fd, SET "[%s]:Port=%d force\n", r->p2lid,
                    ntohs(r->sport));
        if (r->dport)
                fprintf(fd, SET "[%s]:Port=%d force\n", r->p2rid,
                    ntohs(r->dport));
}

static int
ike_connect(struct ipsec_rule *r, FILE *fd)
{
        switch (r->ikemode) {
        case IKE_ACTIVE:
        case IKE_DYNAMIC:
                fprintf(fd, ADD "[Phase 2]:Connections=%s\n", r->p2name);
                break;
        case IKE_PASSIVE:
                fprintf(fd, ADD "[Phase 2]:Passive-Connections=%s\n",
                    r->p2name);
                break;
        default:
                return (-1);
        }
        return (0);
}

static int
ike_gen_config(struct ipsec_rule *r, FILE *fd)
{
        ike_setup_ids(r);
        ike_section_general(r, fd);
        ike_section_peer(r, fd);
        if (ike_section_p1(r, fd) == -1) {
                return (-1);
        }
        ike_section_ids(r, fd);
        ike_section_ipsec(r, fd);
        if (ike_section_p2(r, fd) == -1) {
                return (-1);
        }
        ike_section_p2ids(r, fd);

        if (ike_connect(r, fd) == -1)
                return (-1);
        return (0);
}

static int
ike_delete_config(struct ipsec_rule *r, FILE *fd)
{
        ike_setup_ids(r);
#if 0
        switch (r->ikemode) {
        case IKE_ACTIVE:
        case IKE_DYNAMIC:
                fprintf(fd, "t %s\n", r->p2name);
                break;
        case IKE_PASSIVE:
                fprintf(fd, DELETE "[Phase 2]\n");
                fprintf(fd, "t %s\n", r->p2name);
                break;
        default:
                return (-1);
        }

        if (r->peer) {
                fprintf(fd, DELETE "[%s]\n", r->p1name);
                fprintf(fd, DELETE "[phase1-%s]\n", r->p1name);
        }
        if (r->auth) {
                if (r->auth->srcid)
                        fprintf(fd, DELETE "[%s-ID]\n", r->auth->srcid);
                if (r->auth->dstid)
                        fprintf(fd, DELETE "[%s-ID]\n", r->auth->dstid);
        }
        fprintf(fd, DELETE "[%s]\n", r->p2name);
        fprintf(fd, DELETE "[phase2-%s]\n", r->p2name);
        fprintf(fd, DELETE "[%s]\n", r->p2lid);
        fprintf(fd, DELETE "[%s]\n", r->p2rid);
#else
        fprintf(fd, "t %s\n", r->p2name);
        switch (r->ikemode) {
        case IKE_ACTIVE:
        case IKE_DYNAMIC:
                fprintf(fd, RMV "[Phase 2]:Connections=%s\n", r->p2name);
                break;
        case IKE_PASSIVE:
                fprintf(fd, RMV "[Phase 2]:Passive-Connections=%s\n",
                    r->p2name);
                break;
        default:
                return (-1);
        }
        fprintf(fd, DELETE "[%s]\n", r->p2name);
        fprintf(fd, DELETE "[phase2-%s]\n", r->p2name);
#endif

        return (0);
}

static void
ike_setup_ids(struct ipsec_rule *r)
{
        char sproto[10], ssport[10], sdport[10];

        /* phase 1 name is peer and local address */
        if (r->peer) {
                if (r->local) {
                        /* peer-dstaddr-local-srcaddr */
                        if (asprintf(&r->p1name, "peer-%s-local-%s",
                            r->peer->name, r->local->name) == -1)
                                err(1, "ike_setup_ids");
                } else
                        /* peer-dstaddr */
                        if (asprintf(&r->p1name, "peer-%s",
                            r->peer->name) == -1)
                                err(1, "ike_setup_ids");
        } else
                if ((r->p1name = strdup("peer-default")) == NULL)
                        err(1, "ike_setup_ids");

        /* Phase 2 name is from and to network, protocol, port*/
        if (r->flags & IPSEC_RULE_F_IFACE) {
                if (asprintf(&r->p2lid, "from-sec%u", r->iface) == -1)
                        err(1, "ike_setup_ids");
                if (asprintf(&r->p2rid, "to-sec%u", r->iface) == -1)
                        err(1, "ike_setup_ids");
        } else {
                sproto[0] = ssport[0] = sdport[0] = 0;
                if (r->proto)
                        snprintf(sproto, sizeof sproto, "=%u", r->proto);
                if (r->sport)
                        snprintf(ssport, sizeof ssport, ":%u", ntohs(r->sport));
                if (r->dport)
                        snprintf(sdport, sizeof sdport, ":%u", ntohs(r->dport));

                /* from-network/masklen=proto:port */
                if (asprintf(&r->p2lid, "from-%s%s%s", r->src->name,
                    sproto, ssport) == -1)
                        err(1, "ike_setup_ids");
                /* to-network/masklen=proto:port */
                if (asprintf(&r->p2rid, "to-%s%s%s", r->dst->name,
                    sproto, sdport) == -1)
                        err(1, "ike_setup_ids");
        }

        /* from-network/masklen=proto:port-to-network/masklen=proto:port */
        if (asprintf(&r->p2name, "%s-%s", r->p2lid , r->p2rid) == -1)
                err(1, "ike_setup_ids");
        /* nat-network/masklen=proto:port */
        if (r->src->srcnat && r->src->srcnat->name) {
                if (asprintf(&r->p2nid, "nat-%s%s%s", r->src->srcnat->name, sproto,
                    ssport) == -1)
                        err(1, "ike_setup_ids");
        }
}

int
ike_print_config(struct ipsec_rule *r, int opts)
{
        if (opts & IPSECCTL_OPT_DELETE)
                return (ike_delete_config(r, stdout));
        else
                return (ike_gen_config(r, stdout));
}

int
ike_ipsec_establish(int action, struct ipsec_rule *r, const char *fifo)
{
        struct stat      sb;
        FILE            *fdp;
        int              fd, ret = 0;

        if ((fd = open(fifo, O_WRONLY)) == -1)
                err(1, "ike_ipsec_establish: open(%s)", fifo);
        if (fstat(fd, &sb) == -1)
                err(1, "ike_ipsec_establish: fstat(%s)", fifo);
        if (!S_ISFIFO(sb.st_mode))
                errx(1, "ike_ipsec_establish: %s not a fifo", fifo);
        if ((fdp = fdopen(fd, "w")) == NULL)
                err(1, "ike_ipsec_establish: fdopen(%s)", fifo);

        switch (action) {
        case ACTION_ADD:
                ret = ike_gen_config(r, fdp);
                break;
        case ACTION_DELETE:
                ret = ike_delete_config(r, fdp);
                break;
        default:
                ret = -1;
        }

        fclose(fdp);
        return (ret);
}