GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/hostapd/llc.c Lines: 0 31 0.0 %
Date: 2017-11-13 Branches: 0 8 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: llc.c,v 1.6 2015/01/16 06:40:17 deraadt Exp $	*/
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/*
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 * Copyright (c) 2004, 2005 Reyk Floeter <reyk@openbsd.org>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <net/if_media.h>
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#include <net/if_arp.h>
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#include <net/if_llc.h>
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#include <net/bpf.h>
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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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 <unistd.h>
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#include <limits.h>
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#include "hostapd.h"
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void
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hostapd_llc_init(struct hostapd_config *cfg)
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{
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	struct hostapd_iapp *iapp = &cfg->c_iapp;
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	struct ifreq ifr;
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	u_int i;
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	iapp->i_raw = hostapd_bpf_open(O_WRONLY);
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	cfg->c_flags |= HOSTAPD_CFG_F_RAW;
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	bzero(&ifr, sizeof(struct ifreq));
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	(void)strlcpy(ifr.ifr_name, iapp->i_iface, sizeof(ifr.ifr_name));
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	/* Associate the wired network interface to the BPF descriptor */
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	if (ioctl(iapp->i_raw, BIOCSETIF, &ifr) == -1)
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		hostapd_fatal("failed to set BPF interface \"%s\": %s\n",
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		    iapp->i_iface, strerror(errno));
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	i = 1;
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	if (ioctl(iapp->i_raw, BIOCSHDRCMPLT, &i) == -1)
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		hostapd_fatal("failed to set BPF header completion: %s\n",
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		    strerror(errno));
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	/* Lock the BPF descriptor, no further configuration */
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	if (ioctl(iapp->i_raw, BIOCLOCK, NULL) == -1)
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		hostapd_fatal("failed to lock BPF interface on \"%s\": %s\n",
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		    iapp->i_iface, strerror(errno));
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}
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int
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hostapd_llc_send_xid(struct hostapd_config *cfg, struct hostapd_node *node)
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{
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	struct hostapd_iapp *iapp = &cfg->c_iapp;
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	struct hostapd_llc *llc;
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	u_int8_t buf[ETHER_HDR_LEN + (LLC_UFRAMELEN * 2)];
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	/*
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	 * Send an IEEE 802.3 LLC XID frame which will possibly force
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	 * our switch port on the wired network to learn the station's
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	 * new MAC address.
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	 */
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	bzero(&buf, sizeof(buf));
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	llc = (struct hostapd_llc *)&buf;
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	memset(&llc->x_hdr.ether_dhost, 0xff,
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	    sizeof(llc->x_hdr.ether_dhost));
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	bcopy(&node->ni_macaddr, &llc->x_hdr.ether_shost,
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	    sizeof(llc->x_hdr.ether_shost));
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	llc->x_hdr.ether_type = htons(sizeof(buf));
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	llc->x_llc.llc_control = IAPP_LLC;
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	llc->x_llc.llc_fid = IAPP_LLC_XID;
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	llc->x_llc.llc_class = IAPP_LLC_CLASS;
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	llc->x_llc.llc_window = IAPP_LLC_WINDOW;
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	if (write(iapp->i_raw, &buf, sizeof(buf)) == -1)
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		return (errno);
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	return (0);
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}