ip/xfrm_monitor.c

   1 /* $USAGI: $ */
   2
   3 /*
   4  * Copyright (C)2005 USAGI/WIDE Project
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses>.
  18  */
  19 /*
  20  * based on ipmonitor.c
  21  */
  22 /*
  23  * Authors:
  24  *      Masahide NAKAMURA @USAGI
  25  */
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <netinet/in.h>
  31
  32 #include "utils.h"
  33 #include "xfrm.h"
  34 #include "ip_common.h"
  35
  36 static void usage(void) __attribute__((noreturn));
  37 static int listen_all_nsid;
  38 static bool nokeys;
  39
  40 static void usage(void)
  41 {
  42         fprintf(stderr,
  43                 "Usage: ip xfrm monitor [ nokeys ] [ all-nsid ] [ all | OBJECTS | help ]\n"
  44                 "OBJECTS := { acquire | expire | SA | aevent | policy | report }\n");
  45         exit(-1);
  46 }
  47
  48 static int xfrm_acquire_print(struct nlmsghdr *n, void *arg)
  49 {
  50         FILE *fp = (FILE *)arg;
  51         struct xfrm_user_acquire *xacq = NLMSG_DATA(n);
  52         int len = n->nlmsg_len;
  53         struct rtattr *tb[XFRMA_MAX+1];
  54         __u16 family;
  55
  56         len -= NLMSG_LENGTH(sizeof(*xacq));
  57         if (len < 0) {
  58                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
  59                 return -1;
  60         }
  61
  62         parse_rtattr(tb, XFRMA_MAX, XFRMACQ_RTA(xacq), len);
  63
  64         family = xacq->sel.family;
  65         if (family == AF_UNSPEC)
  66                 family = xacq->policy.sel.family;
  67         if (family == AF_UNSPEC)
  68                 family = preferred_family;
  69
  70         fprintf(fp, "acquire ");
  71
  72         fprintf(fp, "proto %s ", strxf_xfrmproto(xacq->id.proto));
  73         if (show_stats > 0 || xacq->id.spi) {
  74                 __u32 spi = ntohl(xacq->id.spi);
  75
  76                 fprintf(fp, "spi 0x%08x", spi);
  77                 if (show_stats > 0)
  78                         fprintf(fp, "(%u)", spi);
  79                 fprintf(fp, " ");
  80         }
  81         fprintf(fp, "%s", _SL_);
  82
  83         xfrm_selector_print(&xacq->sel, family, fp, "  sel ");
  84
  85         xfrm_policy_info_print(&xacq->policy, tb, fp, "    ", "  policy ");
  86
  87         if (show_stats > 0)
  88                 fprintf(fp, "  seq 0x%08u ", xacq->seq);
  89         if (show_stats > 0) {
  90                 fprintf(fp, "%s-mask %s ",
  91                         strxf_algotype(XFRMA_ALG_CRYPT),
  92                         strxf_mask32(xacq->ealgos));
  93                 fprintf(fp, "%s-mask %s ",
  94                         strxf_algotype(XFRMA_ALG_AUTH),
  95                         strxf_mask32(xacq->aalgos));
  96                 fprintf(fp, "%s-mask %s",
  97                         strxf_algotype(XFRMA_ALG_COMP),
  98                         strxf_mask32(xacq->calgos));
  99         }
 100         fprintf(fp, "%s", _SL_);
 101
 102         if (oneline)
 103                 fprintf(fp, "\n");
 104         fflush(fp);
 105
 106         return 0;
 107 }
 108
 109 static int xfrm_state_flush_print(struct nlmsghdr *n, void *arg)
 110 {
 111         FILE *fp = (FILE *)arg;
 112         struct xfrm_usersa_flush *xsf = NLMSG_DATA(n);
 113         int len = n->nlmsg_len;
 114         const char *str;
 115
 116         len -= NLMSG_SPACE(sizeof(*xsf));
 117         if (len < 0) {
 118                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 119                 return -1;
 120         }
 121
 122         fprintf(fp, "Flushed state ");
 123
 124         str = strxf_xfrmproto(xsf->proto);
 125         if (str)
 126                 fprintf(fp, "proto %s", str);
 127         else
 128                 fprintf(fp, "proto %u", xsf->proto);
 129         fprintf(fp, "%s", _SL_);
 130
 131         if (oneline)
 132                 fprintf(fp, "\n");
 133         fflush(fp);
 134
 135         return 0;
 136 }
 137
 138 static int xfrm_policy_flush_print(struct nlmsghdr *n, void *arg)
 139 {
 140         struct rtattr *tb[XFRMA_MAX+1];
 141         FILE *fp = (FILE *)arg;
 142         int len = n->nlmsg_len;
 143
 144         len -= NLMSG_SPACE(0);
 145         if (len < 0) {
 146                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 147                 return -1;
 148         }
 149
 150         fprintf(fp, "Flushed policy ");
 151
 152         parse_rtattr(tb, XFRMA_MAX, NLMSG_DATA(n), len);
 153
 154         if (tb[XFRMA_POLICY_TYPE]) {
 155                 struct xfrm_userpolicy_type *upt;
 156
 157                 fprintf(fp, "ptype ");
 158
 159                 if (RTA_PAYLOAD(tb[XFRMA_POLICY_TYPE]) < sizeof(*upt))
 160                         fprintf(fp, "(ERROR truncated)");
 161
 162                 upt = RTA_DATA(tb[XFRMA_POLICY_TYPE]);
 163                 fprintf(fp, "%s ", strxf_ptype(upt->type));
 164         }
 165
 166         fprintf(fp, "%s", _SL_);
 167
 168         if (oneline)
 169                 fprintf(fp, "\n");
 170         fflush(fp);
 171
 172         return 0;
 173 }
 174
 175 static int xfrm_report_print(struct nlmsghdr *n, void *arg)
 176 {
 177         FILE *fp = (FILE *)arg;
 178         struct xfrm_user_report *xrep = NLMSG_DATA(n);
 179         int len = n->nlmsg_len;
 180         struct rtattr *tb[XFRMA_MAX+1];
 181         __u16 family;
 182
 183         len -= NLMSG_LENGTH(sizeof(*xrep));
 184         if (len < 0) {
 185                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 186                 return -1;
 187         }
 188
 189         family = xrep->sel.family;
 190         if (family == AF_UNSPEC)
 191                 family = preferred_family;
 192
 193         fprintf(fp, "report ");
 194
 195         fprintf(fp, "proto %s ", strxf_xfrmproto(xrep->proto));
 196         fprintf(fp, "%s", _SL_);
 197
 198         xfrm_selector_print(&xrep->sel, family, fp, "  sel ");
 199
 200         parse_rtattr(tb, XFRMA_MAX, XFRMREP_RTA(xrep), len);
 201
 202         xfrm_xfrma_print(tb, family, fp, "  ", nokeys);
 203
 204         if (oneline)
 205                 fprintf(fp, "\n");
 206
 207         return 0;
 208 }
 209
 210 static void xfrm_ae_flags_print(__u32 flags, void *arg)
 211 {
 212         FILE *fp = (FILE *)arg;
 213
 214         fprintf(fp, " (0x%x) ", flags);
 215         if (!flags)
 216                 return;
 217         if (flags & XFRM_AE_CR)
 218                 fprintf(fp, " replay update ");
 219         if (flags & XFRM_AE_CE)
 220                 fprintf(fp, " timer expired ");
 221         if (flags & XFRM_AE_CU)
 222                 fprintf(fp, " policy updated ");
 223
 224 }
 225
 226 static void xfrm_usersa_print(const struct xfrm_usersa_id *sa_id, __u32 reqid, FILE *fp)
 227 {
 228         fprintf(fp, "dst %s ",
 229                 rt_addr_n2a(sa_id->family, sizeof(sa_id->daddr), &sa_id->daddr));
 230
 231         fprintf(fp, " reqid 0x%x", reqid);
 232
 233         fprintf(fp, " protocol %s ", strxf_proto(sa_id->proto));
 234         fprintf(fp, " SPI 0x%x", ntohl(sa_id->spi));
 235 }
 236
 237 static int xfrm_ae_print(struct nlmsghdr *n, void *arg)
 238 {
 239         FILE *fp = (FILE *)arg;
 240         struct xfrm_aevent_id *id = NLMSG_DATA(n);
 241
 242         fprintf(fp, "Async event ");
 243         xfrm_ae_flags_print(id->flags, arg);
 244         fprintf(fp, "\n\t");
 245         fprintf(fp, "src %s ", rt_addr_n2a(id->sa_id.family,
 246                                            sizeof(id->saddr), &id->saddr));
 247
 248         xfrm_usersa_print(&id->sa_id, id->reqid, fp);
 249
 250         fprintf(fp, "\n");
 251         fflush(fp);
 252
 253         return 0;
 254 }
 255
 256 static void xfrm_print_addr(FILE *fp, int family, xfrm_address_t *a)
 257 {
 258         fprintf(fp, "%s", rt_addr_n2a(family, sizeof(*a), a));
 259 }
 260
 261 static int xfrm_mapping_print(struct nlmsghdr *n, void *arg)
 262 {
 263         FILE *fp = (FILE *)arg;
 264         struct xfrm_user_mapping *map = NLMSG_DATA(n);
 265
 266         fprintf(fp, "Mapping change ");
 267         xfrm_print_addr(fp, map->id.family, &map->old_saddr);
 268
 269         fprintf(fp, ":%d -> ", ntohs(map->old_sport));
 270         xfrm_print_addr(fp, map->id.family, &map->new_saddr);
 271         fprintf(fp, ":%d\n\t", ntohs(map->new_sport));
 272
 273         xfrm_usersa_print(&map->id, map->reqid, fp);
 274
 275         fprintf(fp, "\n");
 276         fflush(fp);
 277         return 0;
 278 }
 279
 280 static int xfrm_accept_msg(struct rtnl_ctrl_data *ctrl,
 281                            struct nlmsghdr *n, void *arg)
 282 {
 283         FILE *fp = (FILE *)arg;
 284
 285         if (timestamp)
 286                 print_timestamp(fp);
 287
 288         if (listen_all_nsid) {
 289                 if (ctrl == NULL || ctrl->nsid < 0)
 290                         fprintf(fp, "[nsid current]");
 291                 else
 292                         fprintf(fp, "[nsid %d]", ctrl->nsid);
 293         }
 294
 295         switch (n->nlmsg_type) {
 296         case XFRM_MSG_NEWSA:
 297         case XFRM_MSG_DELSA:
 298         case XFRM_MSG_UPDSA:
 299         case XFRM_MSG_EXPIRE:
 300                 xfrm_state_print(n, arg);
 301                 return 0;
 302         case XFRM_MSG_NEWPOLICY:
 303         case XFRM_MSG_DELPOLICY:
 304         case XFRM_MSG_UPDPOLICY:
 305         case XFRM_MSG_POLEXPIRE:
 306                 xfrm_policy_print(n, arg);
 307                 return 0;
 308         case XFRM_MSG_ACQUIRE:
 309                 xfrm_acquire_print(n, arg);
 310                 return 0;
 311         case XFRM_MSG_FLUSHSA:
 312                 xfrm_state_flush_print(n, arg);
 313                 return 0;
 314         case XFRM_MSG_FLUSHPOLICY:
 315                 xfrm_policy_flush_print(n, arg);
 316                 return 0;
 317         case XFRM_MSG_REPORT:
 318                 xfrm_report_print(n, arg);
 319                 return 0;
 320         case XFRM_MSG_NEWAE:
 321                 xfrm_ae_print(n, arg);
 322                 return 0;
 323         case XFRM_MSG_MAPPING:
 324                 xfrm_mapping_print(n, arg);
 325                 return 0;
 326         default:
 327                 break;
 328         }
 329
 330         if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
 331             n->nlmsg_type != NLMSG_DONE) {
 332                 fprintf(fp, "Unknown message: %08d 0x%08x 0x%08x\n",
 333                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 334         }
 335         return 0;
 336 }
 337
 338 extern struct rtnl_handle rth;
 339
 340 int do_xfrm_monitor(int argc, char **argv)
 341 {
 342         char *file = NULL;
 343         unsigned int groups = ~((unsigned)0); /* XXX */
 344         int lacquire = 0;
 345         int lexpire = 0;
 346         int laevent = 0;
 347         int lpolicy = 0;
 348         int lsa = 0;
 349         int lreport = 0;
 350
 351         rtnl_close(&rth);
 352
 353         while (argc > 0) {
 354                 if (matches(*argv, "file") == 0) {
 355                         NEXT_ARG();
 356                         file = *argv;
 357                 } else if (strcmp(*argv, "nokeys") == 0) {
 358                         nokeys = true;
 359                 } else if (strcmp(*argv, "all") == 0) {
 360                         /* fall out */
 361                 } else if (matches(*argv, "all-nsid") == 0) {
 362                         listen_all_nsid = 1;
 363                 } else if (matches(*argv, "acquire") == 0) {
 364                         lacquire = 1;
 365                         groups = 0;
 366                 } else if (matches(*argv, "expire") == 0) {
 367                         lexpire = 1;
 368                         groups = 0;
 369                 } else if (matches(*argv, "SA") == 0) {
 370                         lsa = 1;
 371                         groups = 0;
 372                 } else if (matches(*argv, "aevent") == 0) {
 373                         laevent = 1;
 374                         groups = 0;
 375                 } else if (matches(*argv, "policy") == 0) {
 376                         lpolicy = 1;
 377                         groups = 0;
 378                 } else if (matches(*argv, "report") == 0) {
 379                         lreport = 1;
 380                         groups = 0;
 381                 } else if (matches(*argv, "help") == 0) {
 382                         usage();
 383                 } else {
 384                         fprintf(stderr, "Argument \"%s\" is unknown, try \"ip xfrm monitor help\".\n", *argv);
 385                         exit(-1);
 386                 }
 387                 argc--; argv++;
 388         }
 389
 390         if (lacquire)
 391                 groups |= nl_mgrp(XFRMNLGRP_ACQUIRE);
 392         if (lexpire)
 393                 groups |= nl_mgrp(XFRMNLGRP_EXPIRE);
 394         if (lsa)
 395                 groups |= nl_mgrp(XFRMNLGRP_SA);
 396         if (lpolicy)
 397                 groups |= nl_mgrp(XFRMNLGRP_POLICY);
 398         if (laevent)
 399                 groups |= nl_mgrp(XFRMNLGRP_AEVENTS);
 400         if (lreport)
 401                 groups |= nl_mgrp(XFRMNLGRP_REPORT);
 402
 403         if (file) {
 404                 FILE *fp;
 405                 int err;
 406
 407                 fp = fopen(file, "r");
 408                 if (fp == NULL) {
 409                         perror("Cannot fopen");
 410                         exit(-1);
 411                 }
 412                 err = rtnl_from_file(fp, xfrm_accept_msg, stdout);
 413                 fclose(fp);
 414                 return err;
 415         }
 416
 417         if (rtnl_open_byproto(&rth, groups, NETLINK_XFRM) < 0)
 418                 exit(1);
 419         if (listen_all_nsid && rtnl_listen_all_nsid(&rth) < 0)
 420                 exit(1);
 421
 422         if (rtnl_listen(&rth, xfrm_accept_msg, (void *)stdout) < 0)
 423                 exit(2);
 424
 425         return 0;
 426 }