tipc/nametable.c

   1 /*
   2  * nametable.c  TIPC nametable functionality.
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Richard Alpe <richard.alpe@ericsson.com>
  10  */
  11
  12 #include <stdio.h>
  13 #include <errno.h>
  14
  15 #include <linux/tipc_netlink.h>
  16 #include <linux/tipc.h>
  17 #include <linux/genetlink.h>
  18 #include <libmnl/libmnl.h>
  19
  20 #include "cmdl.h"
  21 #include "msg.h"
  22 #include "nametable.h"
  23
  24 #define PORTID_STR_LEN 45 /* Four u32 and five delimiter chars */
  25
  26 static int nametable_show_cb(const struct nlmsghdr *nlh, void *data)
  27 {
  28         int *iteration = data;
  29         char port_id[PORTID_STR_LEN];
  30         struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  31         struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  32         struct nlattr *attrs[TIPC_NLA_NAME_TABLE_MAX + 1] = {};
  33         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1] = {};
  34         const char *scope[] = { "", "zone", "cluster", "node" };
  35
  36         mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  37         if (!info[TIPC_NLA_NAME_TABLE])
  38                 return MNL_CB_ERROR;
  39
  40         mnl_attr_parse_nested(info[TIPC_NLA_NAME_TABLE], parse_attrs, attrs);
  41         if (!attrs[TIPC_NLA_NAME_TABLE_PUBL])
  42                 return MNL_CB_ERROR;
  43
  44         mnl_attr_parse_nested(attrs[TIPC_NLA_NAME_TABLE_PUBL], parse_attrs, publ);
  45         if (!publ[TIPC_NLA_NAME_TABLE_PUBL])
  46                 return MNL_CB_ERROR;
  47
  48         if (!*iteration)
  49                 printf("%-10s %-10s %-10s %-26s %-10s\n",
  50                        "Type", "Lower", "Upper", "Port Identity",
  51                        "Publication Scope");
  52         (*iteration)++;
  53
  54         snprintf(port_id, sizeof(port_id), "<%u.%u.%u:%u>",
  55                  tipc_zone(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
  56                  tipc_cluster(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
  57                  tipc_node(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
  58                  mnl_attr_get_u32(publ[TIPC_NLA_PUBL_REF]));
  59
  60         printf("%-10u %-10u %-10u %-26s %-12u",
  61                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_TYPE]),
  62                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
  63                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_UPPER]),
  64                port_id,
  65                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_KEY]));
  66
  67         printf("%s\n", scope[mnl_attr_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
  68
  69         return MNL_CB_OK;
  70 }
  71
  72 static int cmd_nametable_show(struct nlmsghdr *nlh, const struct cmd *cmd,
  73                               struct cmdl *cmdl, void *data)
  74 {
  75         int iteration = 0;
  76         char buf[MNL_SOCKET_BUFFER_SIZE];
  77
  78         if (help_flag) {
  79                 fprintf(stderr, "Usage: %s nametable show\n", cmdl->argv[0]);
  80                 return -EINVAL;
  81         }
  82
  83         if (!(nlh = msg_init(buf, TIPC_NL_NAME_TABLE_GET))) {
  84                 fprintf(stderr, "error, message initialisation failed\n");
  85                 return -1;
  86         }
  87
  88         return msg_dumpit(nlh, nametable_show_cb, &iteration);
  89 }
  90
  91 void cmd_nametable_help(struct cmdl *cmdl)
  92 {
  93         fprintf(stderr,
  94                 "Usage: %s nametable COMMAND\n\n"
  95                 "COMMANDS\n"
  96                 " show                  - Show nametable\n",
  97                 cmdl->argv[0]);
  98 }
  99
 100 int cmd_nametable(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
 101                   void *data)
 102 {
 103         const struct cmd cmds[] = {
 104                 { "show",       cmd_nametable_show,     NULL },
 105                 { NULL }
 106         };
 107
 108         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 109 }