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
nametable_show_cb(const struct nlmsghdr * nlh,void * data)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
cmd_nametable_show(struct nlmsghdr * nlh,const struct cmd * cmd,struct cmdl * cmdl,void * data)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
cmd_nametable_help(struct cmdl * cmdl)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
cmd_nametable(struct nlmsghdr * nlh,const struct cmd * cmd,struct cmdl * cmdl,void * data)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 }
110