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 #include "utils.h"
  25
  26 #define PORTID_STR_LEN 45 /* Four u32 and five delimiter chars */
  27
  28 static int nametable_show_cb(const struct nlmsghdr *nlh, void *data)
  29 {
  30         int *iteration = data;
  31         struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  32         struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  33         struct nlattr *attrs[TIPC_NLA_NAME_TABLE_MAX + 1] = {};
  34         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1] = {};
  35         const char *scope[] = { "", "zone", "cluster", "node" };
  36         char str[33] = {0,};
  37
  38         mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  39         if (!info[TIPC_NLA_NAME_TABLE])
  40                 return MNL_CB_ERROR;
  41
  42         mnl_attr_parse_nested(info[TIPC_NLA_NAME_TABLE], parse_attrs, attrs);
  43         if (!attrs[TIPC_NLA_NAME_TABLE_PUBL])
  44                 return MNL_CB_ERROR;
  45
  46         mnl_attr_parse_nested(attrs[TIPC_NLA_NAME_TABLE_PUBL], parse_attrs, publ);
  47         if (!publ[TIPC_NLA_NAME_TABLE_PUBL])
  48                 return MNL_CB_ERROR;
  49
  50         if (!*iteration && !is_json_context())
  51                 printf("%-10s %-10s %-10s %-8s %-10s %-33s\n",
  52                        "Type", "Lower", "Upper", "Scope", "Port",
  53                        "Node");
  54         (*iteration)++;
  55
  56         hash2nodestr(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE]), str);
  57
  58         open_json_object(NULL);
  59         print_uint(PRINT_ANY, "type", "%-10u",
  60                            mnl_attr_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
  61         print_string(PRINT_FP, NULL, " ", "");
  62         print_uint(PRINT_ANY, "lower", "%-10u",
  63                            mnl_attr_get_u32(publ[TIPC_NLA_PUBL_LOWER]));
  64         print_string(PRINT_FP, NULL, " ", "");
  65         print_uint(PRINT_ANY, "upper", "%-10u",
  66                            mnl_attr_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
  67         print_string(PRINT_FP, NULL, " ", "");
  68         print_string(PRINT_ANY, "scope", "%-8s",
  69                              scope[mnl_attr_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
  70         print_string(PRINT_FP, NULL, " ", "");
  71         print_uint(PRINT_ANY, "port", "%-10u",
  72                            mnl_attr_get_u32(publ[TIPC_NLA_PUBL_REF]));
  73         print_string(PRINT_FP, NULL, " ", "");
  74         print_string(PRINT_ANY, "node", "%s", str);
  75         print_string(PRINT_FP, NULL, "\n", "");
  76         close_json_object();
  77
  78         return MNL_CB_OK;
  79 }
  80
  81 static int cmd_nametable_show(struct nlmsghdr *nlh, const struct cmd *cmd,
  82                               struct cmdl *cmdl, void *data)
  83 {
  84         int iteration = 0;
  85         char buf[MNL_SOCKET_BUFFER_SIZE];
  86         int rc = 0;
  87
  88         if (help_flag) {
  89                 fprintf(stderr, "Usage: %s nametable show\n", cmdl->argv[0]);
  90                 return -EINVAL;
  91         }
  92
  93         if (!(nlh = msg_init(buf, TIPC_NL_NAME_TABLE_GET))) {
  94                 fprintf(stderr, "error, message initialisation failed\n");
  95                 return -1;
  96         }
  97
  98         new_json_obj(json);
  99         rc = msg_dumpit(nlh, nametable_show_cb, &iteration);
 100         delete_json_obj();
 101
 102         return rc;
 103 }
 104
 105 void cmd_nametable_help(struct cmdl *cmdl)
 106 {
 107         fprintf(stderr,
 108                 "Usage: %s nametable COMMAND\n\n"
 109                 "COMMANDS\n"
 110                 " show                  - Show nametable\n",
 111                 cmdl->argv[0]);
 112 }
 113
 114 int cmd_nametable(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
 115                   void *data)
 116 {
 117         const struct cmd cmds[] = {
 118                 { "show",       cmd_nametable_show,     NULL },
 119                 { NULL }
 120         };
 121
 122         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 123 }