LXR iproute2/tipc/socket.c

   1/*
   2 * socket.c     TIPC socket 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.h>
  16#include <linux/tipc_netlink.h>
  17#include <linux/genetlink.h>
  18#include <libmnl/libmnl.h>
  19
  20#include "mnl_utils.h"
  21#include "cmdl.h"
  22#include "msg.h"
  23#include "socket.h"
  24
  25#define PORTID_STR_LEN 45 /* Four u32 and five delimiter chars */
  26
  27static int publ_list_cb(const struct nlmsghdr *nlh, void *data)
  28{
  29        struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  30        struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  31        struct nlattr *attrs[TIPC_NLA_SOCK_MAX + 1] = {};
  32
  33        mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  34        if (!info[TIPC_NLA_PUBL])
  35                return MNL_CB_ERROR;
  36
  37        mnl_attr_parse_nested(info[TIPC_NLA_PUBL], parse_attrs, attrs);
  38
  39        printf("  bound to {%u,%u,%u}\n",
  40               mnl_attr_get_u32(attrs[TIPC_NLA_PUBL_TYPE]),
  41               mnl_attr_get_u32(attrs[TIPC_NLA_PUBL_LOWER]),
  42               mnl_attr_get_u32(attrs[TIPC_NLA_PUBL_UPPER]));
  43
  44        return MNL_CB_OK;
  45}
  46
  47static int publ_list(uint32_t sock)
  48{
  49        struct mnlu_gen_socket sock_nlg;
  50        struct nlmsghdr *nlh;
  51        struct nlattr *nest;
  52        int err;
  53
  54        err = mnlu_gen_socket_open(&sock_nlg, TIPC_GENL_V2_NAME,
  55                                   TIPC_GENL_V2_VERSION);
  56        if (err)
  57                return -1;
  58
  59        nlh = mnlu_gen_socket_cmd_prepare(&sock_nlg, TIPC_NL_PUBL_GET,
  60                                          NLM_F_REQUEST | NLM_F_DUMP);
  61        if (!nlh) {
  62                fprintf(stderr, "error, message initialisation failed\n");
  63                mnlu_gen_socket_close(&sock_nlg);
  64                return -1;
  65        }
  66
  67        nest = mnl_attr_nest_start(nlh, TIPC_NLA_SOCK);
  68        mnl_attr_put_u32(nlh, TIPC_NLA_SOCK_REF, sock);
  69        mnl_attr_nest_end(nlh, nest);
  70
  71        err = mnlu_gen_socket_sndrcv(&sock_nlg, nlh, publ_list_cb, NULL);
  72        mnlu_gen_socket_close(&sock_nlg);
  73        return err;
  74}
  75
  76static int sock_list_cb(const struct nlmsghdr *nlh, void *data)
  77{
  78        struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  79        struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  80        struct nlattr *attrs[TIPC_NLA_SOCK_MAX + 1] = {};
  81
  82        mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  83        if (!info[TIPC_NLA_SOCK])
  84                return MNL_CB_ERROR;
  85
  86        mnl_attr_parse_nested(info[TIPC_NLA_SOCK], parse_attrs, attrs);
  87        if (!attrs[TIPC_NLA_SOCK_REF])
  88                return MNL_CB_ERROR;
  89
  90        printf("socket %u\n", mnl_attr_get_u32(attrs[TIPC_NLA_SOCK_REF]));
  91
  92        if (attrs[TIPC_NLA_SOCK_CON]) {
  93                uint32_t node;
  94                struct nlattr *con[TIPC_NLA_CON_MAX + 1] = {};
  95
  96                mnl_attr_parse_nested(attrs[TIPC_NLA_SOCK_CON], parse_attrs, con);
  97                node = mnl_attr_get_u32(con[TIPC_NLA_CON_NODE]);
  98
  99                printf("  connected to %x:%u", node,
 100                        mnl_attr_get_u32(con[TIPC_NLA_CON_SOCK]));
 101
 102                if (con[TIPC_NLA_CON_FLAG])
 103                        printf(" via {%u,%u}\n",
 104                                mnl_attr_get_u32(con[TIPC_NLA_CON_TYPE]),
 105                                mnl_attr_get_u32(con[TIPC_NLA_CON_INST]));
 106                else
 107                        printf("\n");
 108        } else if (attrs[TIPC_NLA_SOCK_HAS_PUBL]) {
 109                publ_list(mnl_attr_get_u32(attrs[TIPC_NLA_SOCK_REF]));
 110        }
 111
 112        return MNL_CB_OK;
 113}
 114
 115static int cmd_socket_list(struct nlmsghdr *nlh, const struct cmd *cmd,
 116                           struct cmdl *cmdl, void *data)
 117{
 118        if (help_flag) {
 119                fprintf(stderr, "Usage: %s socket list\n", cmdl->argv[0]);
 120                return -EINVAL;
 121        }
 122
 123        nlh = msg_init(TIPC_NL_SOCK_GET);
 124        if (!nlh) {
 125                fprintf(stderr, "error, message initialisation failed\n");
 126                return -1;
 127        }
 128
 129        return msg_dumpit(nlh, sock_list_cb, NULL);
 130}
 131
 132void cmd_socket_help(struct cmdl *cmdl)
 133{
 134        fprintf(stderr,
 135                "Usage: %s socket COMMAND\n\n"
 136                "Commands:\n"
 137                " list                  - List sockets (ports)\n",
 138                cmdl->argv[0]);
 139}
 140
 141int cmd_socket(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
 142                  void *data)
 143{
 144        const struct cmd cmds[] = {
 145                { "list",       cmd_socket_list,        NULL },
 146                { NULL }
 147        };
 148
 149        return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 150}
 151