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 int listen_all_nsid;
  38
  39 static void usage(void)
  40 {
  41         fprintf(stderr, "Usage: ip xfrm monitor [all-nsid] [ all | OBJECTS | help ]\n");
  42         fprintf(stderr, "OBJECTS := { acquire | expire | SA | aevent | policy | report }\n");
  43         exit(-1);
  44 }
  45
  46 static int xfrm_acquire_print(const struct sockaddr_nl *who,
  47                               struct nlmsghdr *n, void *arg)
  48 {
  49         FILE *fp = (FILE *)arg;
  50         struct xfrm_user_acquire *xacq = NLMSG_DATA(n);
  51         int len = n->nlmsg_len;
  52         struct rtattr *tb[XFRMA_MAX+1];
  53         __u16 family;
  54
  55         len -= NLMSG_LENGTH(sizeof(*xacq));
  56         if (len < 0) {
  57                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
  58                 return -1;
  59         }
  60
  61         parse_rtattr(tb, XFRMA_MAX, XFRMACQ_RTA(xacq), len);
  62
  63         family = xacq->sel.family;
  64         if (family == AF_UNSPEC)
  65                 family = xacq->policy.sel.family;
  66         if (family == AF_UNSPEC)
  67                 family = preferred_family;
  68
  69         fprintf(fp, "acquire ");
  70
  71         fprintf(fp, "proto %s ", strxf_xfrmproto(xacq->id.proto));
  72         if (show_stats > 0 || xacq->id.spi) {
  73                 __u32 spi = ntohl(xacq->id.spi);
  74
  75                 fprintf(fp, "spi 0x%08x", spi);
  76                 if (show_stats > 0)
  77                         fprintf(fp, "(%u)", spi);
  78                 fprintf(fp, " ");
  79         }
  80         fprintf(fp, "%s", _SL_);
  81
  82         xfrm_selector_print(&xacq->sel, family, fp, "  sel ");
  83
  84         xfrm_policy_info_print(&xacq->policy, tb, fp, "    ", "  policy ");
  85
  86         if (show_stats > 0)
  87                 fprintf(fp, "  seq 0x%08u ", xacq->seq);
  88         if (show_stats > 0) {
  89                 fprintf(fp, "%s-mask %s ",
  90                         strxf_algotype(XFRMA_ALG_CRYPT),
  91                         strxf_mask32(xacq->ealgos));
  92                 fprintf(fp, "%s-mask %s ",
  93                         strxf_algotype(XFRMA_ALG_AUTH),
  94                         strxf_mask32(xacq->aalgos));
  95                 fprintf(fp, "%s-mask %s",
  96                         strxf_algotype(XFRMA_ALG_COMP),
  97                         strxf_mask32(xacq->calgos));
  98         }
  99         fprintf(fp, "%s", _SL_);
 100
 101         if (oneline)
 102                 fprintf(fp, "\n");
 103         fflush(fp);
 104
 105         return 0;
 106 }
 107
 108 static int xfrm_state_flush_print(const struct sockaddr_nl *who,
 109                                   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(const struct sockaddr_nl *who,
 139                                    struct nlmsghdr *n, void *arg)
 140 {
 141         struct rtattr *tb[XFRMA_MAX+1];
 142         FILE *fp = (FILE *)arg;
 143         int len = n->nlmsg_len;
 144
 145         len -= NLMSG_SPACE(0);
 146         if (len < 0) {
 147                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 148                 return -1;
 149         }
 150
 151         fprintf(fp, "Flushed policy ");
 152
 153         parse_rtattr(tb, XFRMA_MAX, NLMSG_DATA(n), len);
 154
 155         if (tb[XFRMA_POLICY_TYPE]) {
 156                 struct xfrm_userpolicy_type *upt;
 157
 158                 fprintf(fp, "ptype ");
 159
 160                 if (RTA_PAYLOAD(tb[XFRMA_POLICY_TYPE]) < sizeof(*upt))
 161                         fprintf(fp, "(ERROR truncated)");
 162
 163                 upt = RTA_DATA(tb[XFRMA_POLICY_TYPE]);
 164                 fprintf(fp, "%s ", strxf_ptype(upt->type));
 165         }
 166
 167         fprintf(fp, "%s", _SL_);
 168
 169         if (oneline)
 170                 fprintf(fp, "\n");
 171         fflush(fp);
 172
 173         return 0;
 174 }
 175
 176 static int xfrm_report_print(const struct sockaddr_nl *who,
 177                              struct nlmsghdr *n, void *arg)
 178 {
 179         FILE *fp = (FILE *)arg;
 180         struct xfrm_user_report *xrep = NLMSG_DATA(n);
 181         int len = n->nlmsg_len;
 182         struct rtattr *tb[XFRMA_MAX+1];
 183         __u16 family;
 184
 185         len -= NLMSG_LENGTH(sizeof(*xrep));
 186         if (len < 0) {
 187                 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
 188                 return -1;
 189         }
 190
 191         family = xrep->sel.family;
 192         if (family == AF_UNSPEC)
 193                 family = preferred_family;
 194
 195         fprintf(fp, "report ");
 196
 197         fprintf(fp, "proto %s ", strxf_xfrmproto(xrep->proto));
 198         fprintf(fp, "%s", _SL_);
 199
 200         xfrm_selector_print(&xrep->sel, family, fp, "  sel ");
 201
 202         parse_rtattr(tb, XFRMA_MAX, XFRMREP_RTA(xrep), len);
 203
 204         xfrm_xfrma_print(tb, family, fp, "  ");
 205
 206         if (oneline)
 207                 fprintf(fp, "\n");
 208
 209         return 0;
 210 }
 211
 212 static void xfrm_ae_flags_print(__u32 flags, void *arg)
 213 {
 214         FILE *fp = (FILE *)arg;
 215
 216         fprintf(fp, " (0x%x) ", flags);
 217         if (!flags)
 218                 return;
 219         if (flags & XFRM_AE_CR)
 220                 fprintf(fp, " replay update ");
 221         if (flags & XFRM_AE_CE)
 222                 fprintf(fp, " timer expired ");
 223         if (flags & XFRM_AE_CU)
 224                 fprintf(fp, " policy updated ");
 225
 226 }
 227
 228 static void xfrm_usersa_print(const struct xfrm_usersa_id *sa_id, __u32 reqid, FILE *fp)
 229 {
 230         fprintf(fp, "dst %s ",
 231                 rt_addr_n2a(sa_id->family, sizeof(sa_id->daddr), &sa_id->daddr));
 232
 233         fprintf(fp, " reqid 0x%x", reqid);
 234
 235         fprintf(fp, " protocol %s ", strxf_proto(sa_id->proto));
 236         fprintf(fp, " SPI 0x%x", ntohl(sa_id->spi));
 237 }
 238
 239 static int xfrm_ae_print(const struct sockaddr_nl *who,
 240                              struct nlmsghdr *n, void *arg)
 241 {
 242         FILE *fp = (FILE *)arg;
 243         struct xfrm_aevent_id *id = NLMSG_DATA(n);
 244
 245         fprintf(fp, "Async event ");
 246         xfrm_ae_flags_print(id->flags, arg);
 247         fprintf(fp, "\n\t");
 248         fprintf(fp, "src %s ", rt_addr_n2a(id->sa_id.family,
 249                                            sizeof(id->saddr), &id->saddr));
 250
 251         xfrm_usersa_print(&id->sa_id, id->reqid, fp);
 252
 253         fprintf(fp, "\n");
 254         fflush(fp);
 255
 256         return 0;
 257 }
 258
 259 static void xfrm_print_addr(FILE *fp, int family, xfrm_address_t *a)
 260 {
 261         fprintf(fp, "%s", rt_addr_n2a(family, sizeof(*a), a));
 262 }
 263
 264 static int xfrm_mapping_print(const struct sockaddr_nl *who,
 265                              struct nlmsghdr *n, void *arg)
 266 {
 267         FILE *fp = (FILE *)arg;
 268         struct xfrm_user_mapping *map = NLMSG_DATA(n);
 269
 270         fprintf(fp, "Mapping change ");
 271         xfrm_print_addr(fp, map->id.family, &map->old_saddr);
 272
 273         fprintf(fp, ":%d -> ", ntohs(map->old_sport));
 274         xfrm_print_addr(fp, map->id.family, &map->new_saddr);
 275         fprintf(fp, ":%d\n\t", ntohs(map->new_sport));
 276
 277         xfrm_usersa_print(&map->id, map->reqid, fp);
 278
 279         fprintf(fp, "\n");
 280         fflush(fp);
 281         return 0;
 282 }
 283
 284 static int xfrm_accept_msg(const struct sockaddr_nl *who,
 285                            struct rtnl_ctrl_data *ctrl,
 286                            struct nlmsghdr *n, void *arg)
 287 {
 288         FILE *fp = (FILE *)arg;
 289
 290         if (timestamp)
 291                 print_timestamp(fp);
 292
 293         if (listen_all_nsid) {
 294                 if (ctrl == NULL || ctrl->nsid < 0)
 295                         fprintf(fp, "[nsid current]");
 296                 else
 297                         fprintf(fp, "[nsid %d]", ctrl->nsid);
 298         }
 299
 300         switch (n->nlmsg_type) {
 301         case XFRM_MSG_NEWSA:
 302         case XFRM_MSG_DELSA:
 303         case XFRM_MSG_UPDSA:
 304         case XFRM_MSG_EXPIRE:
 305                 xfrm_state_print(who, n, arg);
 306                 return 0;
 307         case XFRM_MSG_NEWPOLICY:
 308         case XFRM_MSG_DELPOLICY:
 309         case XFRM_MSG_UPDPOLICY:
 310         case XFRM_MSG_POLEXPIRE:
 311                 xfrm_policy_print(who, n, arg);
 312                 return 0;
 313         case XFRM_MSG_ACQUIRE:
 314                 xfrm_acquire_print(who, n, arg);
 315                 return 0;
 316         case XFRM_MSG_FLUSHSA:
 317                 xfrm_state_flush_print(who, n, arg);
 318                 return 0;
 319         case XFRM_MSG_FLUSHPOLICY:
 320                 xfrm_policy_flush_print(who, n, arg);
 321                 return 0;
 322         case XFRM_MSG_REPORT:
 323                 xfrm_report_print(who, n, arg);
 324                 return 0;
 325         case XFRM_MSG_NEWAE:
 326                 xfrm_ae_print(who, n, arg);
 327                 return 0;
 328         case XFRM_MSG_MAPPING:
 329                 xfrm_mapping_print(who, n, arg);
 330                 return 0;
 331         default:
 332                 break;
 333         }
 334
 335         if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
 336             n->nlmsg_type != NLMSG_DONE) {
 337                 fprintf(fp, "Unknown message: %08d 0x%08x 0x%08x\n",
 338                         n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
 339         }
 340         return 0;
 341 }
 342
 343 extern struct rtnl_handle rth;
 344
 345 int do_xfrm_monitor(int argc, char **argv)
 346 {
 347         char *file = NULL;
 348         unsigned int groups = ~((unsigned)0); /* XXX */
 349         int lacquire = 0;
 350         int lexpire = 0;
 351         int laevent = 0;
 352         int lpolicy = 0;
 353         int lsa = 0;
 354         int lreport = 0;
 355
 356         rtnl_close(&rth);
 357
 358         while (argc > 0) {
 359                 if (matches(*argv, "file") == 0) {
 360                         NEXT_ARG();
 361                         file = *argv;
 362                 } else if (strcmp(*argv, "all") == 0) {
 363                         /* fall out */
 364                 } else if (matches(*argv, "all-nsid") == 0) {
 365                         listen_all_nsid = 1;
 366                 } else if (matches(*argv, "acquire") == 0) {
 367                         lacquire = 1;
 368                         groups = 0;
 369                 } else if (matches(*argv, "expire") == 0) {
 370                         lexpire = 1;
 371                         groups = 0;
 372                 } else if (matches(*argv, "SA") == 0) {
 373                         lsa = 1;
 374                         groups = 0;
 375                 } else if (matches(*argv, "aevent") == 0) {
 376                         laevent = 1;
 377                         groups = 0;
 378                 } else if (matches(*argv, "policy") == 0) {
 379                         lpolicy = 1;
 380                         groups = 0;
 381                 } else if (matches(*argv, "report") == 0) {
 382                         lreport = 1;
 383                         groups = 0;
 384                 } else if (matches(*argv, "help") == 0) {
 385                         usage();
 386                 } else {
 387                         fprintf(stderr, "Argument \"%s\" is unknown, try \"ip xfrm monitor help\".\n", *argv);
 388                         exit(-1);
 389                 }
 390                 argc--; argv++;
 391         }
 392
 393         if (lacquire)
 394                 groups |= nl_mgrp(XFRMNLGRP_ACQUIRE);
 395         if (lexpire)
 396                 groups |= nl_mgrp(XFRMNLGRP_EXPIRE);
 397         if (lsa)
 398                 groups |= nl_mgrp(XFRMNLGRP_SA);
 399         if (lpolicy)
 400                 groups |= nl_mgrp(XFRMNLGRP_POLICY);
 401         if (laevent)
 402                 groups |= nl_mgrp(XFRMNLGRP_AEVENTS);
 403         if (lreport)
 404                 groups |= nl_mgrp(XFRMNLGRP_REPORT);
 405
 406         if (file) {
 407                 FILE *fp;
 408                 int err;
 409
 410                 fp = fopen(file, "r");
 411                 if (fp == NULL) {
 412                         perror("Cannot fopen");
 413                         exit(-1);
 414                 }
 415                 err = rtnl_from_file(fp, xfrm_accept_msg, stdout);
 416                 fclose(fp);
 417                 return err;
 418         }
 419
 420         if (rtnl_open_byproto(&rth, groups, NETLINK_XFRM) < 0)
 421                 exit(1);
 422         if (listen_all_nsid && rtnl_listen_all_nsid(&rth) < 0)
 423                 exit(1);
 424
 425         if (rtnl_listen(&rth, xfrm_accept_msg, (void *)stdout) < 0)
 426                 exit(2);
 427
 428         return 0;
 429 }