auto import from //depot/cupcake/@135843

1 files changed, 0 insertions, 707 deletions

diff --git a/net.c b/net.c
deleted file mode 100644
index b905573..0000000
--- a/net.c
+++ /dev/null
@@ -1,707 +0,0 @@
-/* 
- * dhcpcd - DHCP client daemon
- * Copyright 2006-2008 Roy Marples <roy@marples.name>
- * All rights reserved
-
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-
-#include <net/if.h>
-#include <net/if_arp.h>
-#include <arpa/inet.h>
-#include <netinet/in_systm.h>
-#ifdef __linux__
-#include <netinet/ether.h>
-#include <netpacket/packet.h>
-#endif
-#include <netinet/in.h>
-#include <netinet/ip.h>
-#define __FAVOR_BSD /* Nasty glibc hack so we can use BSD semantics for UDP */
-#include <netinet/udp.h>
-#undef __FAVOR_BSD
-#ifdef SIOCGIFMEDIA
-#include <net/if_media.h>
-#endif
-#include <arpa/inet.h>
-#ifdef AF_LINK
-# include <net/if_dl.h>
-#endif
-
-#include <ctype.h>
-#include <errno.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "config.h"
-#include "common.h"
-#include "dhcp.h"
-#include "logger.h"
-#include "net.h"
-#include "signals.h"
-
-int
-inet_ntocidr(struct in_addr address)
-{
-	int cidr = 0;
-	uint32_t mask = htonl(address.s_addr);
-
-	while (mask) {
-		cidr++;
-		mask <<= 1;
-	}
-
-	return cidr;
-}
-
-int
-inet_cidrtoaddr(int cidr, struct in_addr *addr)
-{
-	int ocets;
-
-	if (cidr < 0 || cidr > 32) {
-		errno = EINVAL;
-		return -1;
-	}
-	ocets = (cidr + 7) / 8;
-
-	addr->s_addr = 0;
-	if (ocets > 0) {
-		memset(&addr->s_addr, 255, (size_t)ocets - 1);
-		memset((unsigned char *)&addr->s_addr + (ocets - 1),
-		       (256 - (1 << (32 - cidr) % 8)), 1);
-	}
-
-	return 0;
-}
-
-uint32_t
-get_netmask(uint32_t addr)
-{
-	uint32_t dst;
-
-	if (addr == 0)
-		return 0;
-
-	dst = htonl(addr);
-	if (IN_CLASSA(dst))
-		return ntohl(IN_CLASSA_NET);
-	if (IN_CLASSB (dst))
-		return ntohl(IN_CLASSB_NET);
-	if (IN_CLASSC (dst))
-		return ntohl(IN_CLASSC_NET);
-
-	return 0;
-}
-
-char *
-hwaddr_ntoa(const unsigned char *hwaddr, size_t hwlen)
-{
-	static char buffer[(HWADDR_LEN * 3) + 1];
-	char *p = buffer;
-	size_t i;
-
-	for (i = 0; i < hwlen && i < HWADDR_LEN; i++) {
-		if (i > 0)
-			*p ++= ':';
-		p += snprintf(p, 3, "%.2x", hwaddr[i]);
-	}
-
-	*p ++= '\0';
-
-	return buffer;
-}
-
-size_t
-hwaddr_aton(unsigned char *buffer, const char *addr)
-{
-	char c[3];
-	const char *p = addr;
-	unsigned char *bp = buffer;
-	size_t len = 0;
-
-	c[2] = '\0';
-	while (*p) {
-		c[0] = *p++;
-		c[1] = *p++;
-		/* Ensure that digits are hex */
-		if (isxdigit((unsigned char)c[0]) == 0 ||
-		    isxdigit((unsigned char)c[1]) == 0)
-		{
-			errno = EINVAL;
-			return 0;
-		}
-		/* We should have at least two entries 00:01 */
-		if (len == 0 && *p == '\0') {
-			errno = EINVAL;
-			return 0;
-		}
-		/* Ensure that next data is EOL or a seperator with data */
-		if (!(*p == '\0' || (*p == ':' && *(p + 1) != '\0'))) {
-			errno = EINVAL;
-			return 0;
-		}
-		if (*p)
-			p++;
-		if (bp)
-			*bp++ = (unsigned char)strtol(c, NULL, 16);
-		len++;
-	}
-	return len;
-}
-
-int
-do_interface(const char *ifname,
-	     _unused unsigned char *hwaddr, _unused size_t *hwlen,
-	     struct in_addr *addr, struct in_addr *net, int get)
-{
-	int s;
-	struct ifconf ifc;
-	int retval = 0, found = 0;
-	int len = 10 * sizeof(struct ifreq);
-	int lastlen = 0;
-	char *p;
-	union {
-		char *buffer;
-		struct ifreq *ifr;
-	} ifreqs;
-	struct sockaddr_in address;
-	struct ifreq *ifr;
-	struct sockaddr_in netmask;
-#ifdef AF_LINK
-	struct sockaddr_dl *sdl;
-#endif
-
-	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
-		return -1;
-
-	/* Not all implementations return the needed buffer size for
-	 * SIOGIFCONF so we loop like so for all until it works */
-	memset(&ifc, 0, sizeof(ifc));
-	for (;;) {
-		ifc.ifc_len = len;
-		ifc.ifc_buf = xmalloc((size_t)len);
-		if (ioctl(s, SIOCGIFCONF, &ifc) == -1) {
-			if (errno != EINVAL || lastlen != 0) {
-				close(s);
-				free(ifc.ifc_buf);	
-				return -1;
-			}
-		} else {
-			if (ifc.ifc_len == lastlen)
-				break;
-			lastlen = ifc.ifc_len;
-		}
-
-		free(ifc.ifc_buf);
-		ifc.ifc_buf = NULL;
-		len *= 2;
-	}
-
-	for (p = (char *)ifc.ifc_buf; p < (char *)ifc.ifc_buf + ifc.ifc_len;) {
-		/* Cast the ifc buffer to an ifreq cleanly */
-		ifreqs.buffer = p;
-		ifr = ifreqs.ifr;
-
-#ifndef __linux__
-		if (ifr->ifr_addr.sa_len > sizeof(ifr->ifr_ifru))
-			p += offsetof(struct ifreq, ifr_ifru) +
-				ifr->ifr_addr.sa_len;
-		else
-#endif
-			p += sizeof(*ifr);
-
-		if (strcmp(ifname, ifr->ifr_name) != 0)
-			continue;
-
-		found = 1;
-
-#ifdef AF_LINK
-		if (hwaddr && hwlen && ifr->ifr_addr.sa_family == AF_LINK) {
-			sdl = xmalloc(ifr->ifr_addr.sa_len);
-			memcpy(sdl, &ifr->ifr_addr, ifr->ifr_addr.sa_len);
-			*hwlen = sdl->sdl_alen;
-			memcpy(hwaddr, LLADDR(sdl), *hwlen);
-			free(sdl);
-			retval = 1;
-			break;
-		}
-#endif
-
-		if (ifr->ifr_addr.sa_family == AF_INET)	{
-			memcpy(&address, &ifr->ifr_addr, sizeof(address));
-			if (ioctl(s, SIOCGIFNETMASK, ifr) == -1)
-				continue;
-			memcpy(&netmask, &ifr->ifr_addr, sizeof(netmask));
-			if (get) {
-				addr->s_addr = address.sin_addr.s_addr;
-				net->s_addr = netmask.sin_addr.s_addr;
-				retval = 1;
-				break;
-			} else {
-				if (address.sin_addr.s_addr == addr->s_addr &&
-				    (!net ||
-				     netmask.sin_addr.s_addr == net->s_addr))
-				{
-					retval = 1;
-					break;
-				}
-			}
-		}
-
-	}
-
-	if (!found)
-		errno = ENXIO;
-	close(s);
-	free(ifc.ifc_buf);
-	return retval;
-}
-
-int
-up_interface(const char *ifname)
-{
-	int s;
-	struct ifreq ifr;
-	int retval = -1;
-#ifdef __linux__
-	char *p;
-#endif
-
-	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
-		return -1;
-	memset(&ifr, 0, sizeof(ifr));
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-#ifdef __linux__
-	/* We can only bring the real interface up */
-	if ((p = strchr(ifr.ifr_name, ':')))
-		*p = '\0';
-#endif
-	if (ioctl(s, SIOCGIFFLAGS, &ifr) == 0) {
-		if ((ifr.ifr_flags & IFF_UP))
-			retval = 0;
-		else {
-			ifr.ifr_flags |= IFF_UP;
-			if (ioctl(s, SIOCSIFFLAGS, &ifr) == 0)
-				retval = 0;
-		}
-	}
-	close(s);
-	return retval;
-}
-
-int
-carrier_status(const char *ifname)
-{
-	int s;
-	struct ifreq ifr;
-	int retval = -1;
-#ifdef SIOCGIFMEDIA
-	struct ifmediareq ifmr;
-#endif
-#ifdef __linux__
-	char *p;
-#endif
-
-	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
-		return -1;
-	memset(&ifr, 0, sizeof(ifr));
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-#ifdef __linux__
-	/* We can only test the real interface up */
-	if ((p = strchr(ifr.ifr_name, ':')))
-		*p = '\0';
-#endif
-	if ((retval = ioctl(s, SIOCGIFFLAGS, &ifr)) == 0) {
-		if (ifr.ifr_flags & IFF_UP && ifr.ifr_flags & IFF_RUNNING)
-			retval = 1;
-		else
-			retval = 0;
-	}
-
-#ifdef SIOCGIFMEDIA
-	if (retval == 1) {
-		memset(&ifmr, 0, sizeof(ifmr));
-		strncpy(ifmr.ifm_name, ifr.ifr_name, sizeof(ifmr.ifm_name));
-		if (ioctl(s, SIOCGIFMEDIA, &ifmr) != -1 &&
-		    ifmr.ifm_status & IFM_AVALID)
-		{
-			if (!(ifmr.ifm_status & IFM_ACTIVE))
-				retval = 0;
-		}
-	}
-#endif
-	close(s);
-	return retval;
-}
-
-struct interface *
-read_interface(const char *ifname, _unused int metric)
-{
-	int s;
-	struct ifreq ifr;
-	struct interface *iface = NULL;
-	unsigned char *hwaddr = NULL;
-	size_t hwlen = 0;
-	sa_family_t family = 0;
-
-	memset(&ifr, 0, sizeof(ifr));
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-
-	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
-		return NULL;
-
-#ifdef __linux__
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-	if (ioctl(s, SIOCGIFHWADDR, &ifr) == -1)
-		goto eexit;
-
-	switch (ifr.ifr_hwaddr.sa_family) {
-	case ARPHRD_ETHER:
-	case ARPHRD_IEEE802:
-		hwlen = ETHER_ADDR_LEN;
-		break;
-	case ARPHRD_IEEE1394:
-		hwlen = EUI64_ADDR_LEN;
-	case ARPHRD_INFINIBAND:
-		hwlen = INFINIBAND_ADDR_LEN;
-		break;
-	}
-
-	hwaddr = xmalloc(sizeof(unsigned char) * HWADDR_LEN);
-	memcpy(hwaddr, ifr.ifr_hwaddr.sa_data, hwlen);
-	family = ifr.ifr_hwaddr.sa_family;
-#else
-	ifr.ifr_metric = metric;
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-	if (ioctl(s, SIOCSIFMETRIC, &ifr) == -1)
-		goto eexit;
-
-	hwaddr = xmalloc(sizeof(unsigned char) * HWADDR_LEN);
-	if (do_interface(ifname, hwaddr, &hwlen, NULL, NULL, 0) != 1)
-		goto eexit;
-
-	family = ARPHRD_ETHER;
-#endif
-
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-	if (ioctl(s, SIOCGIFMTU, &ifr) == -1)
-		goto eexit;
-
-	/* Ensure that the MTU is big enough for DHCP */
-	if (ifr.ifr_mtu < MTU_MIN) {
-		ifr.ifr_mtu = MTU_MIN;
-		strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-		if (ioctl(s, SIOCSIFMTU, &ifr) == -1)
-			goto eexit;
-	}
-
-	if (up_interface(ifname) != 0)
-		goto eexit;
-
-	iface = xzalloc(sizeof(*iface));
-	strlcpy(iface->name, ifname, IF_NAMESIZE);
-	snprintf(iface->leasefile, PATH_MAX, LEASEFILE, ifname);
-	memcpy(&iface->hwaddr, hwaddr, hwlen);
-	iface->hwlen = hwlen;
-
-	iface->family = family;
-	iface->arpable = !(ifr.ifr_flags & (IFF_NOARP | IFF_LOOPBACK));
-
-	/* 0 is a valid fd, so init to -1 */
-	iface->raw_fd = -1;
-	iface->udp_fd = -1;
-	iface->arp_fd = -1;
-	iface->link_fd = -1;
-
-eexit:
-	close(s);
-	free(hwaddr);
-	return iface;
-}
-
-int
-do_mtu(const char *ifname, short int mtu)
-{
-	struct ifreq ifr;
-	int r;
-	int s;
-
-	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
-		return -1;
-
-	memset(&ifr, 0, sizeof(ifr));
-	strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
-	ifr.ifr_mtu = mtu;
-	r = ioctl(s, mtu ? SIOCSIFMTU : SIOCGIFMTU, &ifr);
-	close(s);
-	if (r == -1)
-		return -1;
-	return ifr.ifr_mtu;
-}
-
-void
-free_routes(struct rt *routes)
-{
-	struct rt *r;
-
-	while (routes) {
-		r = routes->next;
-		free(routes);
-		routes = r;
-	}
-}
-
-int
-open_udp_socket(struct interface *iface)
-{
-	int s;
-	union sockunion {
-		struct sockaddr sa;
-		struct sockaddr_in sin;
-	} su;
-	int n;
-#ifdef SO_BINDTODEVICE
-	struct ifreq ifr;
-#endif
-
-	if ((s = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
-		return -1;
-
-	n = 1;
-	if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &n, sizeof(n)) == -1)
-		goto eexit;
-#ifdef SO_BINDTODEVICE
-	memset(&ifr, 0, sizeof(ifr));
-	strlcpy(ifr.ifr_name, iface->name, sizeof(ifr.ifr_name));
-	if (setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) == -1)
-		goto eexit;
-#endif
-	/* As we don't use this socket for receiving, set the
-	 * receive buffer to 1 */
-	n = 1;
-	if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) == -1)
-		goto eexit;
-	memset(&su, 0, sizeof(su));
-	su.sin.sin_family = AF_INET;
-	su.sin.sin_port = htons(DHCP_CLIENT_PORT);
-	su.sin.sin_addr.s_addr = iface->addr.s_addr;
-	if (bind(s, &su.sa, sizeof(su)) == -1)
-		goto eexit;
-
-	iface->udp_fd = s;
-	set_cloexec(s);
-	return 0;
-
-eexit:
-	close(s);
-	return -1;
-}
-
-ssize_t
-send_packet(const struct interface *iface, struct in_addr to,
-	    const uint8_t *data, ssize_t len)
-{
-	union sockunion {
-		struct sockaddr sa;
-		struct sockaddr_in sin;
-	} su;
-
-	memset(&su, 0, sizeof(su));
-	su.sin.sin_family = AF_INET;
-	su.sin.sin_addr.s_addr = to.s_addr;
-	su.sin.sin_port = htons(DHCP_SERVER_PORT);
-
-	return sendto(iface->udp_fd, data, len, 0, &su.sa, sizeof(su));
-}
-
-struct udp_dhcp_packet
-{
-	struct ip ip;
-	struct udphdr udp;
-	struct dhcp_message dhcp;
-};
-const size_t udp_dhcp_len = sizeof(struct udp_dhcp_packet);
-
-static uint16_t
-checksum(const void *data, uint16_t len)
-{
-	const uint8_t *addr = data;
-	uint32_t sum = 0;
-
-	while (len > 1) {
-		sum += addr[0] * 256 + addr[1];
-		addr += 2;
-		len -= 2;
-	}
-
-	if (len == 1)
-		sum += *addr * 256;
-
-	sum = (sum >> 16) + (sum & 0xffff);
-	sum += (sum >> 16);
-
-	sum = htons(sum);
-
-	return ~sum;
-}
-
-ssize_t
-make_udp_packet(uint8_t **packet, const uint8_t *data, size_t length,
-		struct in_addr source, struct in_addr dest)
-{
-	struct udp_dhcp_packet *udpp;
-	struct ip *ip;
-	struct udphdr *udp;
-
-	udpp = xzalloc(sizeof(*udpp));
-	ip = &udpp->ip;
-	udp = &udpp->udp;
-
-	/* OK, this is important :)
-	 * We copy the data to our packet and then create a small part of the
-	 * ip structure and an invalid ip_len (basically udp length).
-	 * We then fill the udp structure and put the checksum
-	 * of the whole packet into the udp checksum.
-	 * Finally we complete the ip structure and ip checksum.
-	 * If we don't do the ordering like so then the udp checksum will be
-	 * broken, so find another way of doing it! */
-
-	memcpy(&udpp->dhcp, data, length);
-
-	ip->ip_p = IPPROTO_UDP;
-	ip->ip_src.s_addr = source.s_addr;
-	if (dest.s_addr == 0)
-		ip->ip_dst.s_addr = INADDR_BROADCAST;
-	else
-		ip->ip_dst.s_addr = dest.s_addr;
-
-	udp->uh_sport = htons(DHCP_CLIENT_PORT);
-	udp->uh_dport = htons(DHCP_SERVER_PORT);
-	udp->uh_ulen = htons(sizeof(*udp) + length);
-	ip->ip_len = udp->uh_ulen;
-	udp->uh_sum = checksum(udpp, sizeof(*udpp));
-
-	ip->ip_v = IPVERSION;
-	ip->ip_hl = 5;
-	ip->ip_id = 0;
-	ip->ip_tos = IPTOS_LOWDELAY;
-	ip->ip_len = htons (sizeof(*ip) + sizeof(*udp) + length);
-	ip->ip_id = 0;
-	ip->ip_off = htons(IP_DF); /* Don't fragment */
-	ip->ip_ttl = IPDEFTTL;
-
-	ip->ip_sum = checksum(ip, sizeof(*ip));
-
-	*packet = (uint8_t *)udpp;
-	return sizeof(*ip) + sizeof(*udp) + length;
-}
-
-ssize_t
-get_udp_data(const uint8_t **data, const uint8_t *udp)
-{
-	struct udp_dhcp_packet packet;
-
-	memcpy(&packet, udp, sizeof(packet));
-	*data = udp + offsetof(struct udp_dhcp_packet, dhcp);
-	return ntohs(packet.ip.ip_len) - sizeof(packet.ip) - sizeof(packet.udp);
-}
-
-int
-valid_udp_packet(const uint8_t *data)
-{
-	struct udp_dhcp_packet packet;
-	uint16_t bytes;
-	uint16_t ipsum;
-	uint16_t iplen;
-	uint16_t udpsum;
-	struct in_addr source;
-	struct in_addr dest;
-	int retval = 0;
-
-	memcpy(&packet, data, sizeof(packet));
-	bytes = ntohs(packet.ip.ip_len);
-	ipsum = packet.ip.ip_sum;
-	iplen = packet.ip.ip_len;
-	udpsum = packet.udp.uh_sum;
-
-	if (0 != checksum(&packet.ip, sizeof(packet.ip))) {
-		errno = EINVAL;
-		return -1;
-	}
-
-	packet.ip.ip_sum = 0;
-	memcpy(&source, &packet.ip.ip_src, sizeof(packet.ip.ip_src));
-	memcpy(&dest, &packet.ip.ip_dst, sizeof(packet.ip.ip_dst));
-	memset(&packet.ip, 0, sizeof(packet.ip));
-	packet.udp.uh_sum = 0;
-
-	packet.ip.ip_p = IPPROTO_UDP;
-	memcpy(&packet.ip.ip_src, &source, sizeof(packet.ip.ip_src));
-	memcpy(&packet.ip.ip_dst, &dest, sizeof(packet.ip.ip_dst));
-	packet.ip.ip_len = packet.udp.uh_ulen;
-	if (udpsum && udpsum != checksum(&packet, bytes)) {
-		errno = EINVAL;
-		retval = -1;
-	}
-
-	return retval;
-}
-
-int
-send_arp(const struct interface *iface, int op, in_addr_t sip, in_addr_t tip)
-{
-	struct arphdr *arp;
-	size_t arpsize;
-	uint8_t *p;
-	int retval;
-
-	arpsize = sizeof(*arp) + 2 * iface->hwlen + 2 * sizeof(sip);
-	arp = xmalloc(arpsize);
-	arp->ar_hrd = htons(iface->family);
-	arp->ar_pro = htons(ETHERTYPE_IP);
-	arp->ar_hln = iface->hwlen;
-	arp->ar_pln = sizeof(sip);
-	arp->ar_op = htons(op);
-	p = (uint8_t *)arp;
-	p += sizeof(*arp);
-	memcpy(p, iface->hwaddr, iface->hwlen);
-	p += iface->hwlen;
-	memcpy(p, &sip, sizeof(sip));
-	p += sizeof(sip);
-	/* ARP requests should ignore this */
-	retval = iface->hwlen;
-	while (retval--)
-		*p++ = '\0';
-	memcpy(p, &tip, sizeof(tip));
-	p += sizeof(tip);
-	retval = send_raw_packet(iface, ETHERTYPE_ARP, arp, arpsize);
-	free(arp);
-	return retval;
-}