tipc/media.c

   1 /*
   2  * media.c      TIPC link 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 <stdlib.h>
  14 #include <string.h>
  15 #include <errno.h>
  16
  17 #include <linux/tipc_netlink.h>
  18 #include <linux/tipc.h>
  19 #include <linux/genetlink.h>
  20 #include <libmnl/libmnl.h>
  21
  22 #include "cmdl.h"
  23 #include "msg.h"
  24 #include "media.h"
  25
  26 static int media_list_cb(const struct nlmsghdr *nlh, void *data)
  27 {
  28         struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  29         struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  30         struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1] = {};
  31
  32         mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  33         if (!info[TIPC_NLA_MEDIA])
  34                 return MNL_CB_ERROR;
  35
  36         mnl_attr_parse_nested(info[TIPC_NLA_MEDIA], parse_attrs, attrs);
  37         if (!attrs[TIPC_NLA_MEDIA_NAME])
  38                 return MNL_CB_ERROR;
  39
  40         printf("%s\n", mnl_attr_get_str(attrs[TIPC_NLA_MEDIA_NAME]));
  41
  42         return MNL_CB_OK;
  43 }
  44
  45 static int cmd_media_list(struct nlmsghdr *nlh, const struct cmd *cmd,
  46                          struct cmdl *cmdl, void *data)
  47 {
  48         char buf[MNL_SOCKET_BUFFER_SIZE];
  49
  50         if (help_flag) {
  51                 fprintf(stderr, "Usage: %s media list\n", cmdl->argv[0]);
  52                 return -EINVAL;
  53         }
  54
  55         if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_GET))) {
  56                 fprintf(stderr, "error, message initialisation failed\n");
  57                 return -1;
  58         }
  59
  60         return msg_dumpit(nlh, media_list_cb, NULL);
  61 }
  62
  63 static int media_get_cb(const struct nlmsghdr *nlh, void *data)
  64 {
  65         int *prop = data;
  66         struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
  67         struct nlattr *info[TIPC_NLA_MAX + 1] = {};
  68         struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1] = {};
  69         struct nlattr *props[TIPC_NLA_PROP_MAX + 1] = {};
  70
  71         mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
  72         if (!info[TIPC_NLA_MEDIA])
  73                 return MNL_CB_ERROR;
  74
  75         mnl_attr_parse_nested(info[TIPC_NLA_MEDIA], parse_attrs, attrs);
  76         if (!attrs[TIPC_NLA_MEDIA_PROP])
  77                 return MNL_CB_ERROR;
  78
  79         mnl_attr_parse_nested(attrs[TIPC_NLA_MEDIA_PROP], parse_attrs, props);
  80         if (!props[*prop])
  81                 return MNL_CB_ERROR;
  82
  83         printf("%u\n", mnl_attr_get_u32(props[*prop]));
  84
  85         return MNL_CB_OK;
  86 }
  87
  88 static int cmd_media_get_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
  89                               struct cmdl *cmdl, void *data)
  90 {
  91         int prop;
  92         char buf[MNL_SOCKET_BUFFER_SIZE];
  93         struct nlattr *nest;
  94         struct opt *opt;
  95         struct opt opts[] = {
  96                 { "media",              NULL },
  97                 { NULL }
  98         };
  99
 100         if (strcmp(cmd->cmd, "priority") == 0)
 101                 prop = TIPC_NLA_PROP_PRIO;
 102         else if ((strcmp(cmd->cmd, "tolerance") == 0))
 103                 prop = TIPC_NLA_PROP_TOL;
 104         else if ((strcmp(cmd->cmd, "window") == 0))
 105                 prop = TIPC_NLA_PROP_WIN;
 106         else
 107                 return -EINVAL;
 108
 109         if (help_flag) {
 110                 (cmd->help)(cmdl);
 111                 return -EINVAL;
 112         }
 113
 114         if (parse_opts(opts, cmdl) < 0)
 115                 return -EINVAL;
 116
 117         if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_GET))) {
 118                 fprintf(stderr, "error, message initialisation failed\n");
 119                 return -1;
 120         }
 121
 122         if (!(opt = get_opt(opts, "media"))) {
 123                 fprintf(stderr, "error, missing media\n");
 124                 return -EINVAL;
 125         }
 126         nest = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA);
 127         mnl_attr_put_strz(nlh, TIPC_NLA_MEDIA_NAME, opt->val);
 128         mnl_attr_nest_end(nlh, nest);
 129
 130         return msg_doit(nlh, media_get_cb, &prop);
 131 }
 132
 133 static void cmd_media_get_help(struct cmdl *cmdl)
 134 {
 135         fprintf(stderr, "Usage: %s media get PPROPERTY media MEDIA\n\n"
 136                 "PROPERTIES\n"
 137                 " tolerance             - Get media tolerance\n"
 138                 " priority              - Get media priority\n"
 139                 " window                - Get media window\n",
 140                 cmdl->argv[0]);
 141 }
 142
 143 static int cmd_media_get(struct nlmsghdr *nlh, const struct cmd *cmd,
 144                         struct cmdl *cmdl, void *data)
 145 {
 146         const struct cmd cmds[] = {
 147                 { "priority",   cmd_media_get_prop,     cmd_media_get_help },
 148                 { "tolerance",  cmd_media_get_prop,     cmd_media_get_help },
 149                 { "window",     cmd_media_get_prop,     cmd_media_get_help },
 150                 { NULL }
 151         };
 152
 153         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 154 }
 155
 156 static void cmd_media_set_help(struct cmdl *cmdl)
 157 {
 158         fprintf(stderr, "Usage: %s media set PPROPERTY media MEDIA\n\n"
 159                 "PROPERTIES\n"
 160                 " tolerance TOLERANCE   - Set media tolerance\n"
 161                 " priority PRIORITY     - Set media priority\n"
 162                 " window WINDOW         - Set media window\n",
 163                 cmdl->argv[0]);
 164 }
 165
 166 static int cmd_media_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
 167                          struct cmdl *cmdl, void *data)
 168 {
 169         int val;
 170         int prop;
 171         char buf[MNL_SOCKET_BUFFER_SIZE];
 172         struct nlattr *props;
 173         struct nlattr *attrs;
 174         struct opt *opt;
 175         struct opt opts[] = {
 176                 { "media",              NULL },
 177                 { NULL }
 178         };
 179
 180         if (strcmp(cmd->cmd, "priority") == 0)
 181                 prop = TIPC_NLA_PROP_PRIO;
 182         else if ((strcmp(cmd->cmd, "tolerance") == 0))
 183                 prop = TIPC_NLA_PROP_TOL;
 184         else if ((strcmp(cmd->cmd, "window") == 0))
 185                 prop = TIPC_NLA_PROP_WIN;
 186         else
 187                 return -EINVAL;
 188
 189         if (help_flag) {
 190                 (cmd->help)(cmdl);
 191                 return -EINVAL;
 192         }
 193
 194         if (cmdl->optind >= cmdl->argc) {
 195                 fprintf(stderr, "error, missing value\n");
 196                 return -EINVAL;
 197         }
 198         val = atoi(shift_cmdl(cmdl));
 199
 200         if (parse_opts(opts, cmdl) < 0)
 201                 return -EINVAL;
 202
 203         if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_SET))) {
 204                 fprintf(stderr, "error, message initialisation failed\n");
 205                 return -1;
 206         }
 207         attrs = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA);
 208
 209         if (!(opt = get_opt(opts, "media"))) {
 210                 fprintf(stderr, "error, missing media\n");
 211                 return -EINVAL;
 212         }
 213         mnl_attr_put_strz(nlh, TIPC_NLA_MEDIA_NAME, opt->val);
 214
 215         props = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA_PROP);
 216         mnl_attr_put_u32(nlh, prop, val);
 217         mnl_attr_nest_end(nlh, props);
 218
 219         mnl_attr_nest_end(nlh, attrs);
 220
 221         return msg_doit(nlh, NULL, NULL);
 222 }
 223
 224 static int cmd_media_set(struct nlmsghdr *nlh, const struct cmd *cmd,
 225                          struct cmdl *cmdl, void *data)
 226 {
 227         const struct cmd cmds[] = {
 228                 { "priority",   cmd_media_set_prop,     cmd_media_set_help },
 229                 { "tolerance",  cmd_media_set_prop,     cmd_media_set_help },
 230                 { "window",     cmd_media_set_prop,     cmd_media_set_help },
 231                 { NULL }
 232         };
 233
 234         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 235 }
 236
 237 void cmd_media_help(struct cmdl *cmdl)
 238 {
 239         fprintf(stderr,
 240                 "Usage: %s media COMMAND [ARGS] ...\n"
 241                 "\n"
 242                 "Commands:\n"
 243                 " list                  - List active media types\n"
 244                 " get                   - Get various media properties\n"
 245                 " set                   - Set various media properties\n",
 246                 cmdl->argv[0]);
 247 }
 248
 249 int cmd_media(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
 250              void *data)
 251 {
 252         const struct cmd cmds[] = {
 253                 { "get",        cmd_media_get,  cmd_media_get_help },
 254                 { "list",       cmd_media_list, NULL },
 255                 { "set",        cmd_media_set,  cmd_media_set_help },
 256                 { NULL }
 257         };
 258
 259         return run_cmd(nlh, cmd, cmds, cmdl, NULL);
 260 }