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 #include "misc.h"
  24
  25 #define PORTID_STR_LEN 45 /* Four u32 and five delimiter chars */
  26
  27 static int nametable_show_cb(const struct nlmsghdr *nlh, void *data)
  28 {
  29         int *iteration = data;
  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         char str[33] = {0,};
  36
  37         mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  38         if (!info[TIPC_NLA_NAME_TABLE])
  39                 return MNL_CB_ERROR;
  40
  41         mnl_attr_parse_nested(info[TIPC_NLA_NAME_TABLE], parse_attrs, attrs);
  42         if (!attrs[TIPC_NLA_NAME_TABLE_PUBL])
  43                 return MNL_CB_ERROR;
  44
  45         mnl_attr_parse_nested(attrs[TIPC_NLA_NAME_TABLE_PUBL], parse_attrs, publ);
  46         if (!publ[TIPC_NLA_NAME_TABLE_PUBL])
  47                 return MNL_CB_ERROR;
  48
  49         if (!*iteration)
  50                 printf("%-10s %-10s %-10s %-8s %-10s %-33s\n",
  51                        "Type", "Lower", "Upper", "Scope", "Port",
  52                        "Node");
  53         (*iteration)++;
  54
  55         hash2nodestr(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE]), str);
  56
  57         printf("%-10u %-10u %-10u %-8s %-10u %s\n",
  58                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_TYPE]),
  59                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
  60                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_UPPER]),
  61                scope[mnl_attr_get_u32(publ[TIPC_NLA_PUBL_SCOPE])],
  62                mnl_attr_get_u32(publ[TIPC_NLA_PUBL_REF]),
  63                str);
  64
  65         return MNL_CB_OK;
  66 }
  67
  68 static int cmd_nametable_show(struct nlmsghdr *nlh, const struct cmd *cmd,
  69                               struct cmdl *cmdl, void *data)
  70 {
  71         int iteration = 0;
  72         char buf[MNL_SOCKET_BUFFER_SIZE];
  73
  74         if (help_flag) {
  75                 fprintf(stderr, "Usage: %s nametable show\n", cmdl->argv[0]);
  76                 return -EINVAL;
  77         }
  78
  79         if (!(nlh = msg_init(buf, TIPC_NL_NAME_TABLE_GET))) {
  80                 fprintf(stderr, "error, message initialisation failed\n");
  81                 return -1;
  82         }
  83
  84         return msg_dumpit(nlh, nametable_show_cb, &iteration);
  85 }
  86
  87 void cmd_nametable_help(struct cmdl *cmdl)
  88 {
  89         fprintf(stderr,
  90                 "Usage: %s nametable COMMAND\n\n"
  91                 "COMMANDS\n"
  92                 " show                  - Show nametable\n",
  93                 cmdl->argv[0]);
  94 }
  95
  96 int cmd_nametable(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
  97                   void *data)
  98 {
  99         const struct cmd cmds[] = {
 100                 { "show",       cmd_nametable_show,     NULL },
 101                 { NULL }
 102         };
 103
 104         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 105 }