Blame tipc/media.c

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/*
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 * media.c	TIPC link functionality.
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 *
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 *		This program is free software; you can redistribute it and/or
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 *		modify it under the terms of the GNU General Public License
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 *		as published by the Free Software Foundation; either version
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 *		2 of the License, or (at your option) any later version.
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 *
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 * Authors:	Richard Alpe <richard.alpe@ericsson.com>
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <linux/tipc_netlink.h>
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#include <linux/tipc.h>
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#include <linux/genetlink.h>
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#include <libmnl/libmnl.h>
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#include "cmdl.h"
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#include "msg.h"
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#include "media.h"
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static int media_list_cb(const struct nlmsghdr *nlh, void *data)
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{
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	struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
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	struct nlattr *info[TIPC_NLA_MAX + 1] = {};
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	struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1] = {};
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	mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
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	if (!info[TIPC_NLA_MEDIA])
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		return MNL_CB_ERROR;
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	mnl_attr_parse_nested(info[TIPC_NLA_MEDIA], parse_attrs, attrs);
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	if (!attrs[TIPC_NLA_MEDIA_NAME])
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		return MNL_CB_ERROR;
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	printf("%s\n", mnl_attr_get_str(attrs[TIPC_NLA_MEDIA_NAME]));
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	return MNL_CB_OK;
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}
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static int cmd_media_list(struct nlmsghdr *nlh, const struct cmd *cmd,
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			 struct cmdl *cmdl, void *data)
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{
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	char buf[MNL_SOCKET_BUFFER_SIZE];
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	if (help_flag) {
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		fprintf(stderr, "Usage: %s media list\n", cmdl->argv[0]);
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		return -EINVAL;
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	}
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	if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_GET))) {
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		fprintf(stderr, "error, message initialisation failed\n");
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		return -1;
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	}
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	return msg_dumpit(nlh, media_list_cb, NULL);
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}
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static int media_get_cb(const struct nlmsghdr *nlh, void *data)
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{
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	int *prop = data;
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	struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
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	struct nlattr *info[TIPC_NLA_MAX + 1] = {};
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	struct nlattr *attrs[TIPC_NLA_MEDIA_MAX + 1] = {};
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	struct nlattr *props[TIPC_NLA_PROP_MAX + 1] = {};
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	mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
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	if (!info[TIPC_NLA_MEDIA])
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		return MNL_CB_ERROR;
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	mnl_attr_parse_nested(info[TIPC_NLA_MEDIA], parse_attrs, attrs);
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	if (!attrs[TIPC_NLA_MEDIA_PROP])
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		return MNL_CB_ERROR;
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	mnl_attr_parse_nested(attrs[TIPC_NLA_MEDIA_PROP], parse_attrs, props);
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	if (!props[*prop])
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		return MNL_CB_ERROR;
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	printf("%u\n", mnl_attr_get_u32(props[*prop]));
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	return MNL_CB_OK;
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}
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static int cmd_media_get_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
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			      struct cmdl *cmdl, void *data)
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{
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	int prop;
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	char buf[MNL_SOCKET_BUFFER_SIZE];
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	struct nlattr *nest;
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	struct opt *opt;
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	struct opt opts[] = {
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		{ "media",		OPT_KEYVAL,	NULL },
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		{ NULL }
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	};
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	if (strcmp(cmd->cmd, "priority") == 0)
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		prop = TIPC_NLA_PROP_PRIO;
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	else if ((strcmp(cmd->cmd, "tolerance") == 0))
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		prop = TIPC_NLA_PROP_TOL;
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	else if ((strcmp(cmd->cmd, "window") == 0))
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		prop = TIPC_NLA_PROP_WIN;
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	else if ((strcmp(cmd->cmd, "mtu") == 0))
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		prop = TIPC_NLA_PROP_MTU;
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	else
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		return -EINVAL;
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	if (help_flag) {
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		(cmd->help)(cmdl);
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		return -EINVAL;
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	}
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	if (parse_opts(opts, cmdl) < 0)
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		return -EINVAL;
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	if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_GET))) {
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		fprintf(stderr, "error, message initialisation failed\n");
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		return -1;
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	}
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	if (!(opt = get_opt(opts, "media"))) {
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		fprintf(stderr, "error, missing media\n");
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		return -EINVAL;
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	}
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	if ((prop == TIPC_NLA_PROP_MTU) &&
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	    (strcmp(opt->val, "udp"))) {
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		fprintf(stderr, "error, not supported for media\n");
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		return -EINVAL;
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	}
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	nest = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA);
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	mnl_attr_put_strz(nlh, TIPC_NLA_MEDIA_NAME, opt->val);
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	mnl_attr_nest_end(nlh, nest);
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	return msg_doit(nlh, media_get_cb, &prop);
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}
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static void cmd_media_get_help(struct cmdl *cmdl)
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{
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	fprintf(stderr, "Usage: %s media get PPROPERTY media MEDIA\n\n"
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		"PROPERTIES\n"
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		" tolerance             - Get media tolerance\n"
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		" priority              - Get media priority\n"
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		" window                - Get media window\n"
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		" mtu                   - Get media mtu\n",
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		cmdl->argv[0]);
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}
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static int cmd_media_get(struct nlmsghdr *nlh, const struct cmd *cmd,
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			struct cmdl *cmdl, void *data)
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{
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	const struct cmd cmds[] = {
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		{ "priority",	cmd_media_get_prop,	cmd_media_get_help },
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		{ "tolerance",	cmd_media_get_prop,	cmd_media_get_help },
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		{ "window",	cmd_media_get_prop,	cmd_media_get_help },
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		{ "mtu",	cmd_media_get_prop,	cmd_media_get_help },
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		{ NULL }
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	};
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	return run_cmd(nlh, cmd, cmds, cmdl, NULL);
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}
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static void cmd_media_set_help(struct cmdl *cmdl)
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{
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	fprintf(stderr, "Usage: %s media set PPROPERTY media MEDIA\n\n"
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		"PROPERTIES\n"
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		" tolerance TOLERANCE   - Set media tolerance\n"
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		" priority PRIORITY     - Set media priority\n"
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		" window WINDOW         - Set media window\n"
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		" mtu MTU               - Set media mtu\n",
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		cmdl->argv[0]);
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}
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static int cmd_media_set_prop(struct nlmsghdr *nlh, const struct cmd *cmd,
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			 struct cmdl *cmdl, void *data)
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{
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	int val;
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	int prop;
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	char buf[MNL_SOCKET_BUFFER_SIZE];
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	struct nlattr *props;
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	struct nlattr *attrs;
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	struct opt *opt;
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	struct opt opts[] = {
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		{ "media",		OPT_KEYVAL,	NULL },
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		{ NULL }
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	};
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	if (strcmp(cmd->cmd, "priority") == 0)
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		prop = TIPC_NLA_PROP_PRIO;
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	else if ((strcmp(cmd->cmd, "tolerance") == 0))
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		prop = TIPC_NLA_PROP_TOL;
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	else if ((strcmp(cmd->cmd, "window") == 0))
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		prop = TIPC_NLA_PROP_WIN;
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	else if ((strcmp(cmd->cmd, "mtu") == 0))
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		prop = TIPC_NLA_PROP_MTU;
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	else
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		return -EINVAL;
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	if (help_flag) {
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		(cmd->help)(cmdl);
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		return -EINVAL;
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	}
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	if (cmdl->optind >= cmdl->argc) {
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		fprintf(stderr, "error, missing value\n");
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		return -EINVAL;
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	}
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	val = atoi(shift_cmdl(cmdl));
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	if (parse_opts(opts, cmdl) < 0)
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		return -EINVAL;
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	if (!(nlh = msg_init(buf, TIPC_NL_MEDIA_SET))) {
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		fprintf(stderr, "error, message initialisation failed\n");
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		return -1;
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	}
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	attrs = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA);
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	if (!(opt = get_opt(opts, "media"))) {
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		fprintf(stderr, "error, missing media\n");
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		return -EINVAL;
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	}
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	if ((prop == TIPC_NLA_PROP_MTU) &&
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	    (strcmp(opt->val, "udp"))) {
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		fprintf(stderr, "error, not supported for media\n");
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		return -EINVAL;
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	}
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	mnl_attr_put_strz(nlh, TIPC_NLA_MEDIA_NAME, opt->val);
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	props = mnl_attr_nest_start(nlh, TIPC_NLA_MEDIA_PROP);
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	mnl_attr_put_u32(nlh, prop, val);
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	mnl_attr_nest_end(nlh, props);
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	mnl_attr_nest_end(nlh, attrs);
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	return msg_doit(nlh, NULL, NULL);
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}
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static int cmd_media_set(struct nlmsghdr *nlh, const struct cmd *cmd,
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			 struct cmdl *cmdl, void *data)
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{
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	const struct cmd cmds[] = {
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		{ "priority",	cmd_media_set_prop,	cmd_media_set_help },
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		{ "tolerance",	cmd_media_set_prop,	cmd_media_set_help },
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		{ "window",	cmd_media_set_prop,	cmd_media_set_help },
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		{ "mtu",	cmd_media_set_prop,	cmd_media_set_help },
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		{ NULL }
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	};
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	return run_cmd(nlh, cmd, cmds, cmdl, NULL);
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}
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void cmd_media_help(struct cmdl *cmdl)
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{
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	fprintf(stderr,
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		"Usage: %s media COMMAND [ARGS] ...\n"
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		"\n"
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		"Commands:\n"
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		" list                  - List active media types\n"
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		" get                   - Get various media properties\n"
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		" set                   - Set various media properties\n",
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		cmdl->argv[0]);
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}
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int cmd_media(struct nlmsghdr *nlh, const struct cmd *cmd, struct cmdl *cmdl,
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	     void *data)
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{
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	const struct cmd cmds[] = {
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		{ "get",	cmd_media_get,	cmd_media_get_help },
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		{ "list",	cmd_media_list,	NULL },
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		{ "set",	cmd_media_set,	cmd_media_set_help },
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		{ NULL }
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	};
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	return run_cmd(nlh, cmd, cmds, cmdl, NULL);
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}