+++ /dev/null
-/* $USAGI: $ */
-
-/*
- * Copyright (C)2004 USAGI/WIDE Project
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-/*
- * based on iproute.c
- */
-/*
- * Authors:
- * Masahide NAKAMURA @USAGI
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <netdb.h>
-#include <linux/netlink.h>
-#include <linux/xfrm.h>
-#include "utils.h"
-#include "xfrm.h"
-#include "ip_common.h"
-
-//#define NLMSG_FLUSH_BUF_SIZE (4096-512)
-#define NLMSG_FLUSH_BUF_SIZE 8192
-
-/*
- * Receiving buffer defines:
- * nlmsg
- * data = struct xfrm_userpolicy_info
- * rtattr
- * data = struct xfrm_user_tmpl[]
- */
-#define NLMSG_BUF_SIZE 4096
-#define RTA_BUF_SIZE 2048
-#define XFRM_TMPLS_BUF_SIZE 1024
-
-static void usage(void) __attribute__((noreturn));
-
-static void usage(void)
-{
- fprintf(stderr, "Usage: ip xfrm policy { add | update } dir DIR sel SELECTOR [ index INDEX ] \n");
- fprintf(stderr, " [ action ACTION ] [ priority PRIORITY ] [ LIMIT-LIST ] [ TMPL-LIST ]\n");
- fprintf(stderr, "Usage: ip xfrm policy { merge | change | replace } dir DIR\n");
- fprintf(stderr, " [ sel SELECTOR | index INDEX ] [ TMPL-LIST ]\n");
- fprintf(stderr, "Usage: ip xfrm policy { delete | get } dir DIR [ sel SELECTOR | index INDEX ]\n");
- fprintf(stderr, "Usage: ip xfrm policy { flush | list } [ dir DIR ] [ sel SELECTOR ]\n");
- fprintf(stderr, " [ index INDEX ] [ action ACTION ] [ priority PRIORITY ]\n");
- fprintf(stderr, "DIR := [ in | out | fwd ]\n");
-
- fprintf(stderr, "SELECTOR := src ADDR[/PLEN] dst ADDR[/PLEN] [ upspec UPSPEC ] [ dev DEV ]\n");
-
- fprintf(stderr, "UPSPEC := proto PROTO [ UPSPEC_OPT ]\n");
- fprintf(stderr, "UPSPEC_OPT := [ [ sport PORT ] [ dport PORT ] ] |\n");
-#ifdef USE_MIP6
- fprintf(stderr, " [ type TYPE [ code CODE ] ](for PROTO=ipv6-icmp) |\n");
- fprintf(stderr, " [ type TYPE ](for PROTO=ipv6-mh)\n");
-#else
- fprintf(stderr, " [ type TYPE [ code CODE ] ](for PROTO=ipv6-icmp)\n");
-#endif
-
- //fprintf(stderr, "DEV - device name(default=none)\n");
-
- fprintf(stderr, "ACTION := [ allow | block ](default=allow)\n");
-
- //fprintf(stderr, "PRIORITY - priority value(default=0)\n");
-
- fprintf(stderr, "LIMIT-LIST := [ LIMIT-LIST ] | [ limit LIMIT ]\n");
- fprintf(stderr, "LIMIT := [ [time-soft|time-hard|time-use-soft|time-use-hard] SECONDS ] |\n");
- fprintf(stderr, " [ [byte-soft|byte-hard] SIZE ] | [ [packet-soft|packet-hard] NUMBER ]\n");
-
- fprintf(stderr, "TMPL-LIST := [ TMPL-LIST ] | [ tmpl TMPL ] | [ tmpl remain ](change only)\n");
- fprintf(stderr, "TMPL := ID [ mode MODE ] [ reqid REQID ] [ level LEVEL ]\n");
- fprintf(stderr, "ID := [ src ADDR ] [ dst ADDR ] [ proto XFRM_PROTO ] [ spi SPI ]\n");
-
-#ifdef USE_MIP6
- fprintf(stderr, "XFRM_PROTO := [ esp | ah | ipcomp | route2 | hao ]\n");
-#else
- fprintf(stderr, "XFRM_PROTO := [ esp | ah | ipcomp ]\n");
-#endif
-
- fprintf(stderr, "MODE := [ transport | tunnel ](default=transport)\n");
- //fprintf(stderr, "REQID - number(default=0)\n");
- fprintf(stderr, "LEVEL := [ required | use ](default=required)\n");
-
- exit(-1);
-}
-
-static int xfrm_policy_dir_parse(__u8 *dir, int *argcp, char ***argvp)
-{
- int argc = *argcp;
- char **argv = *argvp;
-
- if (strcmp(*argv, "in") == 0)
- *dir = XFRM_POLICY_IN;
- else if (strcmp(*argv, "out") == 0)
- *dir = XFRM_POLICY_OUT;
- else if (strcmp(*argv, "fwd") == 0)
- *dir = XFRM_POLICY_FWD;
- else
- invarg("\"DIR\" is invalid", *argv);
-
- *argcp = argc;
- *argvp = argv;
-
- return 0;
-}
-
-static int xfrm_tmpl_parse(struct xfrm_user_tmpl *tmpl,
- int *argcp, char ***argvp)
-{
- int argc = *argcp;
- char **argv = *argvp;
- char *idp = NULL;
-
- while (1) {
- if (strcmp(*argv, "mode") == 0) {
- NEXT_ARG();
- xfrm_mode_parse(&tmpl->mode, &argc, &argv);
- } else if (strcmp(*argv, "reqid") == 0) {
- NEXT_ARG();
- xfrm_reqid_parse(&tmpl->reqid, &argc, &argv);
- } else if (strcmp(*argv, "level") == 0) {
- NEXT_ARG();
-
- if (strcmp(*argv, "required") == 0)
- tmpl->optional = 0;
- else if (strcmp(*argv, "use") == 0)
- tmpl->optional = 1;
- else
- invarg("\"level\" value is invalid\n", *argv);
-
- } else {
- if (idp) {
- PREV_ARG(); /* back track */
- break;
- }
- idp = *argv;
- xfrm_id_parse(&tmpl->saddr, &tmpl->id, &tmpl->family,
- &argc, &argv);
- if (preferred_family == AF_UNSPEC)
- preferred_family = tmpl->family;
- }
-
- if (!NEXT_ARG_OK())
- break;
-
- NEXT_ARG();
- }
- if (argc == *argcp)
- missarg("TMPL");
-
- *argcp = argc;
- *argvp = argv;
-
- return 0;
-}
-
-static int xfrm_policy_modify(int cmd, unsigned flags, int argc, char **argv)
-{
- struct rtnl_handle rth;
- struct {
- struct nlmsghdr n;
- struct xfrm_userpolicy_info xpinfo;
- char buf[RTA_BUF_SIZE];
- } req;
- char *dirp = NULL;
- char tmpls_buf[XFRM_TMPLS_BUF_SIZE];
- int tmpls_len = 0;
-
- memset(&req, 0, sizeof(req));
- memset(&tmpls_buf, 0, sizeof(tmpls_buf));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpinfo));
- req.n.nlmsg_flags = NLM_F_REQUEST|flags;
- req.n.nlmsg_type = cmd;
- req.xpinfo.sel.family = preferred_family;
-
- req.xpinfo.lft.soft_byte_limit = XFRM_INF;
- req.xpinfo.lft.hard_byte_limit = XFRM_INF;
- req.xpinfo.lft.soft_packet_limit = XFRM_INF;
- req.xpinfo.lft.hard_packet_limit = XFRM_INF;
-
- while (argc > 0) {
- if (strcmp(*argv, "dir") == 0) {
- if (dirp)
- duparg("dir", *argv);
- dirp = *argv;
-
- NEXT_ARG();
- xfrm_policy_dir_parse(&req.xpinfo.dir, &argc, &argv);
-
- filter.dir_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "sel") == 0) {
- NEXT_ARG();
- xfrm_selector_parse(&req.xpinfo.sel, &argc, &argv);
- if (preferred_family == AF_UNSPEC)
- preferred_family = req.xpinfo.sel.family;
-
- } else if (strcmp(*argv, "index") == 0) {
- NEXT_ARG();
- if (get_u32(&req.xpinfo.index, *argv, 0))
- invarg("\"INDEX\" is invalid", *argv);
-
- filter.index_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "action") == 0) {
- NEXT_ARG();
- if (strcmp(*argv, "allow") == 0)
- req.xpinfo.action = XFRM_POLICY_ALLOW;
- else if (strcmp(*argv, "block") == 0)
- req.xpinfo.action = XFRM_POLICY_BLOCK;
- else
- invarg("\"action\" value is invalid\n", *argv);
-
- filter.action_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "priority") == 0) {
- NEXT_ARG();
- if (get_u32(&req.xpinfo.priority, *argv, 0))
- invarg("\"PRIORITY\" is invalid", *argv);
-
- filter.priority_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "limit") == 0) {
- NEXT_ARG();
- xfrm_lifetime_cfg_parse(&req.xpinfo.lft, &argc, &argv);
- } else if (strcmp(*argv, "tmpl") == 0) {
- struct xfrm_user_tmpl *tmpl;
-
- if (tmpls_len + sizeof(*tmpl) > sizeof(tmpls_buf)) {
- fprintf(stderr, "Too many tmpls: buffer overflow\n");
- exit(1);
- }
- tmpl = (struct xfrm_user_tmpl *)((char *)tmpls_buf + tmpls_len);
-
- tmpl->family = preferred_family;
- tmpl->aalgos = (~(__u32)0);
- tmpl->ealgos = (~(__u32)0);
- tmpl->calgos = (~(__u32)0);
-
- NEXT_ARG();
- xfrm_tmpl_parse(tmpl, &argc, &argv);
-
- tmpls_len += sizeof(*tmpl);
- } else
- invarg("unknown", *argv);
-
- argc--; argv++;
- }
-
- if (!dirp) {
- fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
- exit(1);
- }
-
- if (tmpls_len > 0) {
- addattr_l(&req.n, sizeof(req), XFRMA_TMPL,
- (void *)tmpls_buf, tmpls_len);
- }
-
- if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
- exit(1);
-
- if (req.xpinfo.sel.family == AF_UNSPEC)
- req.xpinfo.sel.family = AF_INET;
-
- if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
- exit(2);
-
- rtnl_close(&rth);
-
- return 0;
-}
-
-static int xfrm_policy_filter_match(struct xfrm_userpolicy_info *xpinfo)
-{
- if (!filter.use)
- return 1;
-
- if ((xpinfo->dir^filter.xpinfo.dir)&filter.dir_mask)
- return 0;
-
- if (filter.sel_src_mask) {
- if (memcmp(&xpinfo->sel.saddr, &filter.xpinfo.sel.saddr,
- filter.sel_src_mask) != 0)
- return 0;
- if (xpinfo->sel.prefixlen_s != filter.xpinfo.sel.prefixlen_s)
- return 0;
- }
-
- if (filter.sel_dst_mask) {
- if (memcmp(&xpinfo->sel.daddr, &filter.xpinfo.sel.daddr,
- filter.sel_dst_mask) != 0)
- return 0;
- if (xpinfo->sel.prefixlen_d != filter.xpinfo.sel.prefixlen_d)
- return 0;
- }
-
- if ((xpinfo->sel.ifindex^filter.xpinfo.sel.ifindex)&filter.sel_dev_mask)
- return 0;
-
- if ((xpinfo->sel.proto^filter.xpinfo.sel.proto)&filter.upspec_proto_mask)
- return 0;
-
- if (filter.upspec_sport_mask) {
- if (xpinfo->sel.proto == IPPROTO_ICMPV6)
- return 0;
-#ifdef USE_MIP6
- if (xpinfo->sel.proto == IPPROTO_MH)
- return 0;
-#endif
- if ((xpinfo->sel.sport^filter.xpinfo.sel.sport)&filter.upspec_sport_mask)
- return 0;
- }
-
- if (filter.upspec_dport_mask) {
- if (xpinfo->sel.proto == IPPROTO_ICMPV6)
- return 0;
-#ifdef USE_MIP6
- if (xpinfo->sel.proto == IPPROTO_MH)
- return 0;
-#endif
- if ((xpinfo->sel.dport^filter.xpinfo.sel.dport)&filter.upspec_dport_mask)
- return 0;
- }
-
- if (filter.upspec_type_mask) {
- if (xpinfo->sel.proto == IPPROTO_ICMPV6) {
- if ((xpinfo->sel.xfrmsel_icmp_type^filter.xpinfo.sel.xfrmsel_icmp_type)&filter.xpinfo.sel.xfrmsel_icmp_type_mask)
- return 0;
-#ifdef USE_MIP6
- } else if (xpinfo->sel.proto == IPPROTO_MH) {
- if ((xpinfo->sel.xfrmsel_mh_type^filter.xpinfo.sel.xfrmsel_mh_type)&filter.xpinfo.sel.xfrmsel_mh_type_mask)
- return 0;
-#endif
- } else
- return 0;
- }
-
- if (filter.upspec_code_mask) {
- if (xpinfo->sel.proto == IPPROTO_ICMPV6) {
- if ((xpinfo->sel.xfrmsel_icmp_code^filter.xpinfo.sel.xfrmsel_icmp_code)&filter.upspec_code_mask)
- return 0;
- } else
- return 0;
- }
-
- if ((xpinfo->index^filter.xpinfo.index)&filter.index_mask)
- return 0;
-
- if ((xpinfo->action^filter.xpinfo.action)&filter.action_mask)
- return 0;
-
- if ((xpinfo->priority^filter.xpinfo.priority)&filter.priority_mask)
- return 0;
-
- return 1;
-}
-
-int xfrm_policy_print(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
-{
- FILE *fp = (FILE*)arg;
- struct xfrm_userpolicy_info *xpinfo = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct rtattr * tb[XFRM_MAX_DEPTH];
- int ntb;
-
- if (n->nlmsg_type != XFRM_MSG_NEWPOLICY &&
- n->nlmsg_type != XFRM_MSG_DELPOLICY) {
- fprintf(stderr, "Not a policy: %08x %08x %08x\n",
- n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
- return 0;
- }
-
- len -= NLMSG_LENGTH(sizeof(*xpinfo));
- if (len < 0) {
- fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
- return -1;
- }
-
- if (!xfrm_policy_filter_match(xpinfo))
- return 0;
-
- memset(tb, 0, sizeof(tb));
- ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMP_RTA(xpinfo), len);
-
- if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
- fprintf(fp, "Deleted ");
-
- xfrm_selector_print(&xpinfo->sel, preferred_family, fp, NULL);
-
- fprintf(fp, "\t");
- fprintf(fp, "%s ", (xpinfo->dir == XFRM_POLICY_IN ? "in " :
- xpinfo->dir == XFRM_POLICY_OUT ? "out" :
- xpinfo->dir == XFRM_POLICY_FWD ? "fwd" :
- "unknown-dir"));
- fprintf(fp, "%s ", (xpinfo->action == XFRM_POLICY_ALLOW ? "allow" :
- xpinfo->action == XFRM_POLICY_BLOCK ? "block" :
- "unknown-action"));
- fprintf(fp, "index %u ", xpinfo->index);
- fprintf(fp, "priority %u ", xpinfo->priority);
- fprintf(fp, "share %s ", strxf_share(xpinfo->share));
- fprintf(fp, "flags 0x%s", strxf_flags(xpinfo->flags));
- fprintf(fp, "\n");
-
- if (show_stats > 0)
- xfrm_lifetime_print(&xpinfo->lft, &xpinfo->curlft, fp, "\t");
-
- xfrm_xfrma_print(tb, ntb, xpinfo->sel.family, fp, "\t");
-
- return 0;
-}
-
-static int xfrm_policy_get_or_delete(int argc, char **argv, int delete,
- void *res_nlbuf)
-{
- struct rtnl_handle rth;
- struct {
- struct nlmsghdr n;
- struct xfrm_userpolicy_id xpid;
- } req;
- char *dirp = NULL;
- char *selp = NULL;
- char *indexp = NULL;
-
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.n.nlmsg_type = delete ? XFRM_MSG_DELPOLICY : XFRM_MSG_GETPOLICY;
-
- while (argc > 0) {
- if (strcmp(*argv, "dir") == 0) {
- if (dirp)
- duparg("dir", *argv);
- dirp = *argv;
-
- NEXT_ARG();
- xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv);
-
- } else if (strcmp(*argv, "sel") == 0) {
- if (selp)
- duparg("sel", *argv);
- selp = *argv;
-
- NEXT_ARG();
- xfrm_selector_parse(&req.xpid.sel, &argc, &argv);
- if (preferred_family == AF_UNSPEC)
- preferred_family = req.xpid.sel.family;
-
- } else if (strcmp(*argv, "index") == 0) {
- if (indexp)
- duparg("index", *argv);
- indexp = *argv;
-
- NEXT_ARG();
- if (get_u32(&req.xpid.index, *argv, 0))
- invarg("\"INDEX\" is invalid", *argv);
-
- } else
- invarg("unknown", *argv);
-
- argc--; argv++;
- }
-
- if (!dirp) {
- fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
- exit(1);
- }
- if (!selp && !indexp) {
- fprintf(stderr, "Not enough information: either \"SELECTOR\" or \"INDEX\" is required.\n");
- exit(1);
- }
- if (selp && indexp)
- duparg2("SELECTOR", "INDEX");
-
- if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
- exit(1);
-
- if (req.xpid.sel.family == AF_UNSPEC)
- req.xpid.sel.family = AF_INET;
-
- if (rtnl_talk(&rth, &req.n, 0, 0, res_nlbuf, NULL, NULL) < 0)
- exit(2);
-
- rtnl_close(&rth);
-
- return 0;
-}
-
-/*
- * Smaller scored tmpl should be first for a policy.
- * Score=0 means unknown protocol or one which can't be judged.
- */
-static int xfrm_id_proto_score(__u8 proto, __u8 dir)
-{
- /*
- * Basically, score is reversed order as extensions headers
- *
- * <- large small ->
- * [IP][..][RT2][HAO][..][AH][ESP][COMP][..]
- *
- * Exception:
- * At outbound case, any protocols should be followed AH.
- */
- switch (proto) {
- case IPPROTO_ESP:
- return (1 << 3);
- case IPPROTO_AH:
- if (dir == XFRM_POLICY_IN)
- return (1 << 4);
- else
- return (1 << 12);
- case IPPROTO_COMP:
- return (1 << 2);
-#ifdef USE_MIP6
- case IPPROTO_ROUTING: /* assuming RT2 */
- return (1 << 7);
- case IPPROTO_DSTOPTS: /* assuming HAO */
- return (1 << 6);
-#endif
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * Compare templates t1 and t2 and return less than, equal to, or greater
- * than zero if t1 is found respectively, to be before, to be the same,
- * or to be after than t2 for its "preferred" order for a policy
- * in using under IPsec and/or MIPv6.
- */
-static int xfrm_tmpl_preferred_cmp(struct xfrm_user_tmpl *t1,
- struct xfrm_user_tmpl *t2,
- __u8 dir)
-{
- int score1;
- int score2;
-
- score1 = xfrm_id_proto_score(t1->id.proto, dir);
- if (score1 == 0) {
- /* assume t1 as lower score */
- return -1;
- }
-
- score2 = xfrm_id_proto_score(t2->id.proto, dir);
-
- return (score1 - score2);
-}
-
-static int xfrm_tmpl_extract(struct rtattr *tb[], int ntb,
- struct xfrm_user_tmpl *tmpls, int *ntmpls)
-{
- int idx = 0;
- __u16 type;
- int n;
- struct xfrm_user_tmpl *t;
- int i;
- int j;
-
- /* store existing templates */
- for (i = 0; i < ntb; i++) {
- type = tb[i]->rta_type;
- if (type != XFRMA_TMPL) {
- fprintf(stderr, "Policy has attr which is not template: %u\n", type);
- exit(1);
- }
-
- n = tb[i]->rta_len / sizeof(struct xfrm_user_tmpl);
- t = (struct xfrm_user_tmpl *)RTA_DATA(tb[i]);
-
- for (j = 0; j < n; j++) {
- memcpy(&tmpls[idx], &t[j], sizeof(tmpls[idx]));
- idx ++;
- }
- }
-
- *ntmpls = idx;
- return 0;
-}
-
-/*
- * (existing tmpl=ET, new tmpls=NT)
- * Any ET keeps sequence within ETs (ET never changes order within ETs).
- * It is also NT's case. With those rules, tmpls are merged by preferred order.
- */
-static int xfrm_tmpl_merge(struct xfrm_user_tmpl *tcur, int n_tcur,
- struct xfrm_user_tmpl *tnew, int n_tnew,
- __u8 dir, struct nlmsghdr *n, int len)
-{
- struct tmpl_list {
- struct tmpl_list *next;
- struct xfrm_user_tmpl *tmplp;
- };
- struct tmpl_list *head = NULL;
- struct tmpl_list *prev;
- struct tmpl_list *p;
- struct xfrm_user_tmpl tmpls[XFRM_MAX_DEPTH];
- int ntmpls;
- int i;
-
- if (n_tcur + n_tnew > XFRM_MAX_DEPTH) {
- fprintf(stderr, "Too many tmpls when merging: exists=%u + new=%u makes overflow\n", n_tcur, n_tnew);
- exit(1);
- }
-
- fprintf(stderr, "DEBUG: %s: dir = %s\n", __FUNCTION__,
- (dir == XFRM_POLICY_IN ? "in " :
- dir == XFRM_POLICY_OUT ? "out" :
- dir == XFRM_POLICY_FWD ? "fwd" :
- "unknown-dir"));
-
- /* store existing templates to list */
- prev = NULL;
- for (i = 0; i < n_tcur; i++) {
- struct tmpl_list *tl;
-
- tl = malloc(sizeof(struct tmpl_list));
- if (!tl) {
- perror("malloc");
- exit(1);
- }
- tl->next = NULL;
- tl->tmplp = &tcur[i];
-
- fprintf(stderr, "DEBUG: kernel tmpl %d = %u\n",i+1,tl->tmplp->id.proto);
-
- if (!prev)
- head = tl;
- else
- prev->next = tl;
- prev = tl;
- }
-
-#if 1
- for (i = 0; i < n_tnew; i++)
- fprintf(stderr, "DEBUG: new tmpl %d = %u\n",i+1,tnew[i].id.proto);
-#endif
-
- /* order them; compare and insert new one to list */
- i = 0;
- prev = NULL;
- for (p = head; p; p = p->next) {
- int cmp = xfrm_tmpl_preferred_cmp(p->tmplp, &tnew[i], dir);
- if (cmp > 0) {
- struct tmpl_list *tl;
-
- tl = malloc(sizeof(struct tmpl_list));
- if (!tl) {
- perror("malloc");
- exit(1);
- }
- tl->tmplp = &tnew[i];
- tl->next = p;
-
- if (p == head)
- head = tl;
- if (prev)
- prev->next = tl;
- p = tl;
-
- i ++;
- }
- prev = p;
-
- if (i >= n_tnew)
- break;
- }
- if (!p) {
- /* append rest of new tmpls to the end of list */
- p = prev;
- for (; i < n_tnew; i++) {
- struct tmpl_list *tl;
-
- tl = malloc(sizeof(struct tmpl_list));
- if (!tl) {
- perror("malloc");
- exit(1);
- }
- tl->tmplp = &tnew[i];
- tl->next = NULL;
-
- if (!p) /* no kernel tmpls case */
- head = tl;
- else
- p->next = tl;
- p = tl;
- }
- }
-
- /* store ordered list to buffer */
- memset(&tmpls, 0, sizeof(tmpls));
- i = 0;
- for (p = head; p; p = p->next) {
- if (i >= sizeof(tmpls) / sizeof(tmpls[0])) {
- fprintf(stderr, "Too many tmpls: buffer overflow\n");
- exit(1);
- }
-
- memcpy(&tmpls[i], p->tmplp, sizeof(tmpls[i]));
-
- fprintf(stderr, "DEBUG: merged tmpl %d = %u\n", i+1, p->tmplp->id.proto);
-
- i ++;
- }
- ntmpls = i;
-
- prev = NULL;
- for (p = head; p; p = p->next) {
- if (prev)
- free(prev);
- prev = p;
- }
- if (prev)
- free(prev);
-
- addattr_l(n, len, XFRMA_TMPL, (void *)tmpls,
- (sizeof(struct xfrm_user_tmpl) * ntmpls));
-
- return 0;
-}
-
-/*
- * (existing tmpl=ET, new tmpls=NT)
- * Updates ET by specified NT at each order without "remain" NT.
- */
-static int xfrm_tmpl_change(struct xfrm_user_tmpl *tcur, int n_tcur,
- struct xfrm_user_tmpl *tnew, int n_tnew,
- __u8 dir, struct nlmsghdr *n, int len)
-{
- struct xfrm_user_tmpl tmpls[XFRM_MAX_DEPTH];
- int ntmpls;
- int n_changed = 0;
- int i;
-
- if (n_tcur != n_tnew) {
- fprintf(stderr, "Templates count differs: %d != %d\n",
- n_tcur, n_tnew);
- exit(1);
- }
- if (n_tcur >= sizeof(tmpls) / sizeof(tmpls[0])) {
- fprintf(stderr, "Too many tmpls: buffer overflow\n");
- exit(1);
- }
-
- fprintf(stderr, "DEBUG: %s: dir = %s\n", __FUNCTION__,
- (dir == XFRM_POLICY_IN ? "in " :
- dir == XFRM_POLICY_OUT ? "out" :
- dir == XFRM_POLICY_FWD ? "fwd" :
- "unknown-dir"));
-
- /* change it to new one except remain request */
- for (i = 0; i < n_tcur; i++) {
- struct xfrm_user_tmpl *t;
-
- if (tnew[i].id.proto == 0) /* remain case */
- t = &tcur[i];
- else {
- t = &tnew[i];
- n_changed ++;
- }
-
- memcpy(&tmpls[i], t, sizeof(tmpls[i]));
- }
- ntmpls = n_tcur;
-
- if (n_changed == 0) {
- fprintf(stderr, "No template to be changed is found.\n");
- exit(1);
- }
- fprintf(stderr, "DEBUG: changed tmpls = %d\n", n_changed);
-
- addattr_l(n, len, XFRMA_TMPL, (void *)tmpls,
- (sizeof(struct xfrm_user_tmpl) * ntmpls));
-
- return 0;
-}
-
-/*
- * (existing tmpl=ET, new tmpls=NT)
- * Updates the first ET whose protocol is matched with NT once.
- */
-static int xfrm_tmpl_replace(struct xfrm_user_tmpl *tcur, int n_tcur,
- struct xfrm_user_tmpl *tnew, int n_tnew,
- __u8 dir, struct nlmsghdr *n, int len)
-{
- struct xfrm_user_tmpl tmpls[XFRM_MAX_DEPTH];
- int ntmpls;
- int n_replaced = 0;
- int i;
- int j;
-
- if (n_tcur < n_tnew) {
- fprintf(stderr, "Too many tmpls: %d < %d: replace request should be less than current\n", n_tcur, n_tnew);
- exit(1);
- }
- if (n_tcur >= sizeof(tmpls) / sizeof(tmpls[0])) {
- fprintf(stderr, "Too many tmpls: buffer overflow\n");
- exit(1);
- }
-
- /* check if duplcate protocol is found */
- for (i = 0; i < n_tnew; i++) {
- for (j = i + 1; j < n_tnew; j++) {
- if (tnew[j].id.proto == tnew[i].id.proto) {
- fprintf(stderr, "Duplicate protocol specified by replacing request\n");
- exit(1);
- }
- }
- }
-
- /* at first, just store existing tmpls to buffer */
- for (i = 0; i < n_tcur; i++)
- memcpy(&tmpls[i], &tcur[i], sizeof(tmpls[i]));
- ntmpls = n_tcur;
-
- /* compare and change it to new one */
- for (i = 0; i < n_tnew; i++) {
-
- if (tnew[i].id.proto == 0) /* remain case */
- continue;
-
- for (j = 0; j < ntmpls; j++) {
- if (tmpls[j].id.proto == tnew[i].id.proto) {
- memcpy(&tmpls[j], &tnew[i], sizeof(tmpls[j]));
- n_replaced ++;
- break;
- }
- }
- }
-
- if (n_replaced == 0) {
- fprintf(stderr, "No template to be replaced is found.\n");
- exit(1);
- }
- fprintf(stderr, "DEBUG: %s: dir = %s\n", __FUNCTION__,
- (dir == XFRM_POLICY_IN ? "in " :
- dir == XFRM_POLICY_OUT ? "out" :
- dir == XFRM_POLICY_FWD ? "fwd" :
- "unknown-dir"));
- fprintf(stderr, "DEBUG: replaced tmpls = %d\n", n_replaced);
-
- addattr_l(n, len, XFRMA_TMPL, (void *)tmpls,
- (sizeof(struct xfrm_user_tmpl) * ntmpls));
-
- return 0;
-}
-
-/*
- * To modify templates, get existing policy and then update it.
- *
- * "modify":
- * 0 : To merge both exsiting template and new one.
- * 1 : To change existing template by which new one at each order.
- * 2 : To replace existing template whose protocol is matched by new one.
- * Each replacing occurs once.
- */
-static int xfrm_policy_tmpl_modify(int cmd, unsigned flags,
- int argc, char **argv, int modify)
-{
- struct rtnl_handle rth;
- struct {
- struct nlmsghdr n;
- struct xfrm_userpolicy_id xpid;
- } req;
- char *dirp = NULL;
- char *selp = NULL;
- char *indexp = NULL;
- int len;
- struct rtattr * tb[XFRMA_MAX+1];
- int ntb;
- char res_buf[NLMSG_BUF_SIZE];
- struct nlmsghdr *res_n;
- struct xfrm_userpolicy_info *res_xpinfo;
- struct xfrm_user_tmpl tmpls_cur[XFRM_MAX_DEPTH];
- int ntmpls_cur = 0;
- struct xfrm_user_tmpl tmpls_new[XFRM_MAX_DEPTH];
- int ntmpls_new = 0;
- struct {
- struct nlmsghdr n;
- struct xfrm_userpolicy_info xpinfo;
- char buf[RTA_BUF_SIZE];
- } req_upd;
-
- memset(tmpls_cur, 0, sizeof(tmpls_cur));
- memset(tmpls_new, 0, sizeof(tmpls_new));
- memset(&req, 0, sizeof(req));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(req.xpid));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.n.nlmsg_type = XFRM_MSG_GETPOLICY;
-
- while (argc > 0) {
- if (strcmp(*argv, "dir") == 0) {
- if (dirp)
- duparg("dir", *argv);
- dirp = *argv;
-
- NEXT_ARG();
- xfrm_policy_dir_parse(&req.xpid.dir, &argc, &argv);
-
- } else if (strcmp(*argv, "sel") == 0) {
- if (selp)
- duparg("sel", *argv);
- selp = *argv;
-
- NEXT_ARG();
- xfrm_selector_parse(&req.xpid.sel, &argc, &argv);
- if (preferred_family == AF_UNSPEC)
- preferred_family = req.xpid.sel.family;
-
- } else if (strcmp(*argv, "index") == 0) {
- if (indexp)
- duparg("index", *argv);
- indexp = *argv;
-
- NEXT_ARG();
- if (get_u32(&req.xpid.index, *argv, 0))
- invarg("\"INDEX\" is invalid", *argv);
-
- } else if (strcmp(*argv, "tmpl") == 0) {
- struct xfrm_user_tmpl *tmpl;
-
- if (ntmpls_new >= sizeof(tmpls_new) / sizeof(struct xfrm_user_tmpl)) {
- fprintf(stderr, "Too many tmpls: buffer overflow: %d\n", ntmpls_new);
- exit(1);
- }
- tmpl = &tmpls_new[ntmpls_new];
- ntmpls_new ++;
-
- memset(tmpl, 0, sizeof(*tmpl));
- tmpl->family = preferred_family;
- tmpl->aalgos = (~(__u32)0);
- tmpl->ealgos = (~(__u32)0);
- tmpl->calgos = (~(__u32)0);
-
- NEXT_ARG();
-
- if (strcmp(*argv, "remain") == 0) {
- if (modify == 0)
- invarg("invalid with merge command", *argv);
- /*
- * do nothing;
- * id.proto = 0 will be assumed remain one
- * after here.
- */
- } else
- xfrm_tmpl_parse(tmpl, &argc, &argv);
-
- } else
- invarg("unknown", *argv);
-
- argc--; argv++;
- }
-
- if (!dirp) {
- fprintf(stderr, "Not enough information: \"DIR\" is required.\n");
- exit(1);
- }
- if (!selp && !indexp) {
- fprintf(stderr, "Not enough information: either \"SELECTOR\" or \"INDEX\" is required.\n");
- exit(1);
- }
-
- if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
- exit(1);
-
- if (req.xpid.sel.family == AF_UNSPEC)
- req.xpid.sel.family = AF_INET;
-
- memset(res_buf, 0, sizeof(res_buf));
- res_n = (struct nlmsghdr *)res_buf;
-
- /* try to get an existing policy */
- if (rtnl_talk(&rth, &req.n, 0, 0, res_n, NULL, NULL) < 0)
- exit(2);
-
- res_xpinfo = (struct xfrm_userpolicy_info *)NLMSG_DATA(res_n);
- len = res_n->nlmsg_len - NLMSG_LENGTH(sizeof(*res_xpinfo));
- if (len < 0) {
- fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
- return -1;
- }
-
- memset(tb, 0, sizeof(tb));
- ntb = parse_rtattr_byindex(tb, XFRM_MAX_DEPTH, XFRMP_RTA(res_xpinfo), len);
-
- ntmpls_cur = 0;
- xfrm_tmpl_extract(tb, ntb, tmpls_cur, &ntmpls_cur);
-
- memset(&req_upd, 0, sizeof(req_upd));
-
- req_upd.n.nlmsg_len = NLMSG_LENGTH(sizeof(req_upd.xpinfo));
- req_upd.n.nlmsg_flags = NLM_F_REQUEST|flags;
- req_upd.n.nlmsg_type = XFRM_MSG_UPDPOLICY;
-
- memcpy(&req_upd.xpinfo, res_xpinfo, sizeof(req_upd.xpinfo));
-
- switch (modify) {
- case 0:
- /* merging templates */
- xfrm_tmpl_merge(tmpls_cur, ntmpls_cur, tmpls_new, ntmpls_new,
- req.xpid.dir, &req_upd.n, sizeof(req_upd));
- break;
- case 1:
- /* changing templates */
- xfrm_tmpl_change(tmpls_cur, ntmpls_cur, tmpls_new, ntmpls_new,
- req.xpid.dir, &req_upd.n, sizeof(req_upd));
- break;
- case 2:
- /* replacing templates */
- xfrm_tmpl_replace(tmpls_cur, ntmpls_cur, tmpls_new, ntmpls_new,
- req.xpid.dir, &req_upd.n, sizeof(req_upd));
- break;
- default:
- /* not reached */
- fprintf(stderr, "Internal error\n");
- exit(1);
- }
-
- if (req_upd.xpinfo.sel.family == AF_UNSPEC)
- req_upd.xpinfo.sel.family = AF_INET;
-
- /* update with new poilcy */
- if (rtnl_talk(&rth, &req_upd.n, 0, 0, NULL, NULL, NULL) < 0)
- exit(2);
-
- rtnl_close(&rth);
-
- return 0;
-}
-
-static int xfrm_policy_delete(int argc, char **argv)
-{
- return xfrm_policy_get_or_delete(argc, argv, 1, NULL);
-}
-
-static int xfrm_policy_get(int argc, char **argv)
-{
- char buf[NLMSG_BUF_SIZE];
- struct nlmsghdr *n = (struct nlmsghdr *)buf;
-
- memset(buf, 0, sizeof(buf));
-
- xfrm_policy_get_or_delete(argc, argv, 0, n);
-
- if (xfrm_policy_print(NULL, n, (void*)stdout) < 0) {
- fprintf(stderr, "An error :-)\n");
- exit(1);
- }
-
- return 0;
-}
-
-/*
- * With an existing policy of nlmsg, make new nlmsg for deleting the policy
- * and store it to buffer.
- */
-int xfrm_policy_keep(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
-{
- struct xfrm_buffer *xb = (struct xfrm_buffer *)arg;
- struct rtnl_handle *rth = xb->rth;
- struct xfrm_userpolicy_info *xpinfo = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct nlmsghdr *new_n;
- struct xfrm_userpolicy_id *xpid;
-
- if (n->nlmsg_type != XFRM_MSG_NEWPOLICY) {
- fprintf(stderr, "Not a policy: %08x %08x %08x\n",
- n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
- return 0;
- }
-
- len -= NLMSG_LENGTH(sizeof(*xpinfo));
- if (len < 0) {
- fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
- return -1;
- }
-
- if (!xfrm_policy_filter_match(xpinfo))
- return 0;
-
- if (xb->offset > xb->size) {
- fprintf(stderr, "Flush buffer overflow\n");
- return -1;
- }
-
- new_n = (struct nlmsghdr *)(xb->buf + xb->offset);
- new_n->nlmsg_len = NLMSG_LENGTH(sizeof(*xpid));
- new_n->nlmsg_flags = NLM_F_REQUEST;
- new_n->nlmsg_type = XFRM_MSG_DELPOLICY;
- new_n->nlmsg_seq = ++rth->seq;
-
- xpid = NLMSG_DATA(new_n);
- memcpy(&xpid->sel, &xpinfo->sel, sizeof(xpid->sel));
- xpid->dir = xpinfo->dir;
- xpid->index = xpinfo->index;
-
- xb->offset += new_n->nlmsg_len;
- xb->nlmsg_count ++;
-
- return 0;
-}
-
-static int xfrm_policy_list_or_flush(int argc, char **argv, int flush)
-{
- struct rtnl_handle rth;
-
- if (argc > 0)
- filter.use = 1;
- filter.xpinfo.sel.family = preferred_family;
-
- while (argc > 0) {
- if (strcmp(*argv, "dir") == 0) {
- NEXT_ARG();
- xfrm_policy_dir_parse(&filter.xpinfo.dir, &argc, &argv);
-
- filter.dir_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "sel") == 0) {
- NEXT_ARG();
- xfrm_selector_parse(&filter.xpinfo.sel, &argc, &argv);
- if (preferred_family == AF_UNSPEC)
- preferred_family = filter.xpinfo.sel.family;
-
- } else if (strcmp(*argv, "index") == 0) {
- NEXT_ARG();
- if (get_u32(&filter.xpinfo.index, *argv, 0))
- invarg("\"INDEX\" is invalid", *argv);
-
- filter.index_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "action") == 0) {
- NEXT_ARG();
- if (strcmp(*argv, "allow") == 0)
- filter.xpinfo.action = XFRM_POLICY_ALLOW;
- else if (strcmp(*argv, "block") == 0)
- filter.xpinfo.action = XFRM_POLICY_BLOCK;
- else
- invarg("\"action\" value is invalid\n", *argv);
-
- filter.action_mask = XFRM_FILTER_MASK_FULL;
-
- } else if (strcmp(*argv, "priority") == 0) {
- NEXT_ARG();
- if (get_u32(&filter.xpinfo.priority, *argv, 0))
- invarg("\"PRIORITY\" is invalid", *argv);
-
- filter.priority_mask = XFRM_FILTER_MASK_FULL;
-
- } else
- invarg("unknown", *argv);
-
- argc--; argv++;
- }
-
- if (rtnl_open_byproto(&rth, 0, NETLINK_XFRM) < 0)
- exit(1);
-
- if (flush) {
- struct xfrm_buffer xb;
- char buf[NLMSG_FLUSH_BUF_SIZE];
- int i;
-
- xb.buf = buf;
- xb.size = sizeof(buf);
- xb.rth = &rth;
-
- for (i = 0; ; i++) {
- xb.offset = 0;
- xb.nlmsg_count = 0;
-
- if (show_stats > 1)
- fprintf(stderr, "Flush round = %d\n", i);
-
- if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETPOLICY) < 0) {
- perror("Cannot send dump request");
- exit(1);
- }
-
- if (rtnl_dump_filter(&rth, xfrm_policy_keep, &xb, NULL, NULL) < 0) {
- fprintf(stderr, "Flush terminated\n");
- exit(1);
- }
- if (xb.nlmsg_count == 0) {
- if (show_stats > 1)
- fprintf(stderr, "Flush completed\n");
- break;
- }
-
- if (rtnl_send(&rth, xb.buf, xb.offset) < 0) {
- perror("Failed to send flush request\n");
- exit(1);
- }
- if (show_stats > 1)
- fprintf(stderr, "Flushed nlmsg count = %d\n", xb.nlmsg_count);
-
- xb.offset = 0;
- xb.nlmsg_count = 0;
- }
- } else {
- if (rtnl_wilddump_request(&rth, preferred_family, XFRM_MSG_GETPOLICY) < 0) {
- perror("Cannot send dump request");
- exit(1);
- }
-
- if (rtnl_dump_filter(&rth, xfrm_policy_print, stdout, NULL, NULL) < 0) {
- fprintf(stderr, "Dump terminated\n");
- exit(1);
- }
- }
-
- rtnl_close(&rth);
-
- exit(0);
-}
-
-int do_xfrm_policy(int argc, char **argv)
-{
- if (argc < 1)
- return xfrm_policy_list_or_flush(0, NULL, 0);
-
-#if 0
- /*
- * NLM_F_X is not supported for xfrm in the kernel.
- */
- if (matches(*argv, "add") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_CREATE|NLM_F_EXCL,
- argc-1, argv+1);
- if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_REPLACE,
- argc-1, argv+1);
- if (matches(*argv, "replace") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_CREATE|NLM_F_REPLACE,
- argc-1, argv+1);
- if (matches(*argv, "prepend") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_CREATE,
- argc-1, argv+1);
- if (matches(*argv, "append") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_CREATE|NLM_F_APPEND,
- argc-1, argv+1);
- if (matches(*argv, "test") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, NLM_F_EXCL,
- argc-1, argv+1);
-#endif
- if (matches(*argv, "add") == 0)
- return xfrm_policy_modify(XFRM_MSG_NEWPOLICY, 0,
- argc-1, argv+1);
- if (matches(*argv, "update") == 0)
- return xfrm_policy_modify(XFRM_MSG_UPDPOLICY, 0,
- argc-1, argv+1);
- if (matches(*argv, "merge") == 0)
- return xfrm_policy_tmpl_modify(XFRM_MSG_UPDPOLICY, 0,
- argc-1, argv+1, 0);
- if (matches(*argv, "change") == 0)
- return xfrm_policy_tmpl_modify(XFRM_MSG_UPDPOLICY, 0,
- argc-1, argv+1, 1);
- if (matches(*argv, "replace") == 0)
- return xfrm_policy_tmpl_modify(XFRM_MSG_UPDPOLICY, 0,
- argc-1, argv+1, 2);
- if (matches(*argv, "delete") == 0 || matches(*argv, "del") == 0)
- return xfrm_policy_delete(argc-1, argv+1);
- if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
- || matches(*argv, "lst") == 0)
- return xfrm_policy_list_or_flush(argc-1, argv+1, 0);
- if (matches(*argv, "get") == 0)
- return xfrm_policy_get(argc-1, argv+1);
- if (matches(*argv, "flush") == 0)
- return xfrm_policy_list_or_flush(argc-1, argv+1, 1);
- if (matches(*argv, "help") == 0)
- usage();
- fprintf(stderr, "Command \"%s\" is unknown, try \"ip xfrm policy help\".\n", *argv);
- exit(-1);
-}
projects / mirror_iproute2.git / commitdiff