tests/test-netflow.c

   1 /*
   2  * Copyright (c) 2011, 2012 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18
  19 #include <errno.h>
  20 #include <getopt.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 #include "command-line.h"
  26 #include "daemon.h"
  27 #include "dynamic-string.h"
  28 #include "netflow.h"
  29 #include "ofpbuf.h"
  30 #include "packets.h"
  31 #include "poll-loop.h"
  32 #include "socket-util.h"
  33 #include "unixctl.h"
  34 #include "util.h"
  35 #include "vlog.h"
  36
  37 static void usage(void) NO_RETURN;
  38 static void parse_options(int argc, char *argv[]);
  39
  40 static unixctl_cb_func test_netflow_exit;
  41
  42 static void
  43 print_netflow(struct ofpbuf *buf)
  44 {
  45     const struct netflow_v5_header *hdr;
  46     int i;
  47
  48     hdr = ofpbuf_try_pull(buf, sizeof *hdr);
  49     if (!hdr) {
  50         printf("truncated NetFlow packet header\n");
  51         return;
  52     }
  53     printf("header: v%"PRIu16", "
  54            "uptime %"PRIu32", "
  55            "now %"PRIu32".%09"PRIu32", "
  56            "seq %"PRIu32", "
  57            "engine %"PRIu8",%"PRIu8,
  58            ntohs(hdr->version),
  59            ntohl(hdr->sysuptime),
  60            ntohl(hdr->unix_secs), ntohl(hdr->unix_nsecs),
  61            ntohl(hdr->flow_seq),
  62            hdr->engine_type, hdr->engine_id);
  63     if (hdr->sampling_interval != htons(0)) {
  64         printf(", interval %"PRIu16, ntohs(hdr->sampling_interval));
  65     }
  66     putchar('\n');
  67
  68     for (i = 0; i < ntohs(hdr->count); i++) {
  69         struct netflow_v5_record *rec;
  70
  71         rec = ofpbuf_try_pull(buf, sizeof *rec);
  72         if (!rec) {
  73             printf("truncated NetFlow records\n");
  74             return;
  75         }
  76
  77         printf("seq %"PRIu32": "IP_FMT" > "IP_FMT, ntohl(hdr->flow_seq),
  78                IP_ARGS(rec->src_addr), IP_ARGS(rec->dst_addr));
  79
  80         printf(", if %"PRIu16" > %"PRIu16,
  81                ntohs(rec->input), ntohs(rec->output));
  82
  83         printf(", %"PRIu32" pkts, %"PRIu32" bytes",
  84                ntohl(rec->packet_count), ntohl(rec->byte_count));
  85
  86         switch (rec->ip_proto) {
  87         case IPPROTO_TCP:
  88             printf(", TCP %"PRIu16" > %"PRIu16,
  89                    ntohs(rec->src_port), ntohs(rec->dst_port));
  90             if (rec->tcp_flags) {
  91                 struct ds s = DS_EMPTY_INITIALIZER;
  92                 packet_format_tcp_flags(&s, rec->tcp_flags);
  93                 printf(" %s", ds_cstr(&s));
  94                 ds_destroy(&s);
  95             }
  96             break;
  97
  98         case IPPROTO_UDP:
  99             printf(", UDP %"PRIu16" > %"PRIu16,
 100                    ntohs(rec->src_port), ntohs(rec->dst_port));
 101             break;
 102
 103         case IPPROTO_ICMP:
 104             printf(", ICMP %"PRIu16":%"PRIu16,
 105                    ntohs(rec->dst_port) >> 8,
 106                    ntohs(rec->dst_port) & 0xff);
 107             if (rec->src_port != htons(0)) {
 108                 printf(", src_port=%"PRIu16, ntohs(rec->src_port));
 109             }
 110             break;
 111
 112         default:
 113             printf(", proto %"PRIu8, rec->ip_proto);
 114             break;
 115         }
 116
 117         if (rec->ip_proto != IPPROTO_TCP && rec->tcp_flags != 0) {
 118             printf(", flags %"PRIx8, rec->tcp_flags);
 119         }
 120
 121         if (rec->ip_proto != IPPROTO_TCP &&
 122             rec->ip_proto != IPPROTO_UDP &&
 123             rec->ip_proto != IPPROTO_ICMP) {
 124             if (rec->src_port != htons(0)) {
 125                 printf(", src_port %"PRIu16, ntohs(rec->src_port));
 126             }
 127             if (rec->dst_port != htons(0)) {
 128                 printf(", dst_port %"PRIu16, ntohs(rec->dst_port));
 129             }
 130         }
 131
 132         if (rec->ip_tos) {
 133             printf(", TOS %"PRIx8, rec->ip_tos);
 134         }
 135
 136         printf(", time %"PRIu32"...%"PRIu32,
 137                ntohl(rec->init_time), ntohl(rec->used_time));
 138
 139         if (rec->nexthop != htonl(0)) {
 140             printf(", nexthop "IP_FMT, IP_ARGS(rec->nexthop));
 141         }
 142         if (rec->src_as != htons(0) || rec->dst_as != htons(0)) {
 143             printf(", AS %"PRIu16" > %"PRIu16,
 144                    ntohs(rec->src_as), ntohs(rec->dst_as));
 145         }
 146         if (rec->src_mask != 0 || rec->dst_mask != 0) {
 147             printf(", mask %"PRIu8" > %"PRIu8, rec->src_mask, rec->dst_mask);
 148         }
 149         if (rec->pad1) {
 150             printf(", pad1 %"PRIu8, rec->pad1);
 151         }
 152         if (rec->pad[0] || rec->pad[1]) {
 153             printf(", pad %"PRIu8", %"PRIu8, rec->pad[0], rec->pad[1]);
 154         }
 155         putchar('\n');
 156     }
 157
 158     if (buf->size) {
 159         printf("%zu extra bytes after last record\n", buf->size);
 160     }
 161 }
 162
 163 int
 164 main(int argc, char *argv[])
 165 {
 166     struct unixctl_server *server;
 167     enum { MAX_RECV = 1500 };
 168     const char *target;
 169     struct ofpbuf buf;
 170     bool exiting = false;
 171     int error;
 172     int sock;
 173     int n;
 174
 175     proctitle_init(argc, argv);
 176     set_program_name(argv[0]);
 177     parse_options(argc, argv);
 178
 179     if (argc - optind != 1) {
 180         ovs_fatal(0, "exactly one non-option argument required "
 181                   "(use --help for help)");
 182     }
 183     target = argv[optind];
 184
 185     sock = inet_open_passive(SOCK_DGRAM, target, 0, NULL, 0);
 186     if (sock < 0) {
 187         ovs_fatal(0, "%s: failed to open (%s)", argv[1], strerror(-sock));
 188     }
 189
 190     daemon_save_fd(STDOUT_FILENO);
 191     daemonize_start();
 192
 193     error = unixctl_server_create(NULL, &server);
 194     if (error) {
 195         ovs_fatal(error, "failed to create unixctl server");
 196     }
 197     unixctl_command_register("exit", "", 0, 0, test_netflow_exit, &exiting);
 198
 199     daemonize_complete();
 200
 201     ofpbuf_init(&buf, MAX_RECV);
 202     n = 0;
 203     for (;;) {
 204         int retval;
 205
 206         unixctl_server_run(server);
 207
 208         ofpbuf_clear(&buf);
 209         do {
 210             retval = read(sock, buf.data, buf.allocated);
 211         } while (retval < 0 && errno == EINTR);
 212         if (retval > 0) {
 213             ofpbuf_put_uninit(&buf, retval);
 214             if (n++ > 0) {
 215                 putchar('\n');
 216             }
 217             print_netflow(&buf);
 218             fflush(stdout);
 219         }
 220
 221         if (exiting) {
 222             break;
 223         }
 224
 225         poll_fd_wait(sock, POLLIN);
 226         unixctl_server_wait(server);
 227         poll_block();
 228     }
 229
 230     return 0;
 231 }
 232
 233 static void
 234 parse_options(int argc, char *argv[])
 235 {
 236     enum {
 237         DAEMON_OPTION_ENUMS
 238     };
 239     static struct option long_options[] = {
 240         {"verbose", optional_argument, NULL, 'v'},
 241         {"help", no_argument, NULL, 'h'},
 242         DAEMON_LONG_OPTIONS,
 243         {NULL, 0, NULL, 0},
 244     };
 245     char *short_options = long_options_to_short_options(long_options);
 246
 247     for (;;) {
 248         int c = getopt_long(argc, argv, short_options, long_options, NULL);
 249         if (c == -1) {
 250             break;
 251         }
 252
 253         switch (c) {
 254         case 'h':
 255             usage();
 256
 257         case 'v':
 258             vlog_set_verbosity(optarg);
 259             break;
 260
 261         DAEMON_OPTION_HANDLERS
 262
 263         case '?':
 264             exit(EXIT_FAILURE);
 265
 266         default:
 267             abort();
 268         }
 269     }
 270     free(short_options);
 271 }
 272
 273 static void
 274 usage(void)
 275 {
 276     printf("%s: netflow collector test utility\n"
 277            "usage: %s [OPTIONS] PORT[:IP]\n"
 278            "where PORT is the UDP port to listen on and IP is optionally\n"
 279            "the IP address to listen on.\n",
 280            program_name, program_name);
 281     daemon_usage();
 282     vlog_usage();
 283     printf("\nOther options:\n"
 284            "  -h, --help                  display this help message\n");
 285     exit(EXIT_SUCCESS);
 286 }
 287
 288 static void
 289 test_netflow_exit(struct unixctl_conn *conn,
 290                   int argc OVS_UNUSED, const char *argv[] OVS_UNUSED,
 291                   void *exiting_)
 292 {
 293     bool *exiting = exiting_;
 294     *exiting = true;
 295     unixctl_command_reply(conn, NULL);
 296 }