80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
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/*
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* Netlink helper functions for driver wrappers
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* Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "priv_netlink.h"
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#include "netlink.h"
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int netlink_send_oper_ifla(int sock, int ifindex, int linkmode, int operstate)
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{
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struct {
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struct nlmsghdr hdr;
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struct ifinfomsg ifinfo;
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char opts[16];
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} req;
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struct rtattr *rta;
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static int nl_seq;
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ssize_t ret;
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os_memset(&req, 0, sizeof(req));
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req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
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req.hdr.nlmsg_type = RTM_SETLINK;
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req.hdr.nlmsg_flags = NLM_F_REQUEST;
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req.hdr.nlmsg_seq = ++nl_seq;
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req.hdr.nlmsg_pid = 0;
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req.ifinfo.ifi_family = AF_UNSPEC;
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req.ifinfo.ifi_type = 0;
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req.ifinfo.ifi_index = ifindex;
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req.ifinfo.ifi_flags = 0;
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req.ifinfo.ifi_change = 0;
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if (linkmode != -1) {
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rta = aliasing_hide_typecast(
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((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
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struct rtattr);
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rta->rta_type = IFLA_LINKMODE;
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rta->rta_len = RTA_LENGTH(sizeof(char));
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*((char *) RTA_DATA(rta)) = linkmode;
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req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
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RTA_LENGTH(sizeof(char));
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}
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if (operstate != -1) {
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rta = aliasing_hide_typecast(
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((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
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struct rtattr);
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rta->rta_type = IFLA_OPERSTATE;
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rta->rta_len = RTA_LENGTH(sizeof(char));
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*((char *) RTA_DATA(rta)) = operstate;
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req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
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RTA_LENGTH(sizeof(char));
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}
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wpa_printf(MSG_DEBUG, "netlink: Operstate: linkmode=%d, operstate=%d",
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linkmode, operstate);
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ret = send(sock, &req, req.hdr.nlmsg_len, 0);
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if (ret < 0) {
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wpa_printf(MSG_DEBUG, "netlink: Sending operstate IFLA "
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"failed: %s (assume operstate is not supported)",
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strerror(errno));
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}
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return ret < 0 ? -1 : 0;
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}
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