+++ /dev/null
-/*
- * dhcpcd - DHCP client daemon
- * Copyright (c) 2006-2014 Roy Marples <roy@marples.name>
- *
- * 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/time.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/uio.h>
-
-#include <net/bpf.h>
-#include <net/if.h>
-#include <arpa/inet.h>
-
-#include <errno.h>
-#include <fcntl.h>
-#include <paths.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <unistd.h>
-
-#include "config.h"
-#include "common.h"
-#include "dhcp.h"
-#include "ipv4.h"
-#include "bpf-filter.h"
-
-int
-ipv4_opensocket(struct interface *ifp, int protocol)
-{
- struct dhcp_state *state;
- int fd = -1;
- struct ifreq ifr;
- int ibuf_len = 0;
- size_t buf_len;
- struct bpf_version pv;
- struct bpf_program pf;
-#ifdef BIOCIMMEDIATE
- int flags;
-#endif
-#ifdef _PATH_BPF
- fd = open(_PATH_BPF, O_RDWR | O_CLOEXEC | O_NONBLOCK);
-#else
- char device[32];
- int n = 0;
-
- do {
- snprintf(device, sizeof(device), "/dev/bpf%d", n++);
- fd = open(device, O_RDWR | O_CLOEXEC | O_NONBLOCK);
- } while (fd == -1 && errno == EBUSY);
-#endif
-
- if (fd == -1)
- return -1;
-
- state = D_STATE(ifp);
-
- if (ioctl(fd, BIOCVERSION, &pv) == -1)
- goto eexit;
- if (pv.bv_major != BPF_MAJOR_VERSION ||
- pv.bv_minor < BPF_MINOR_VERSION) {
- syslog(LOG_ERR, "BPF version mismatch - recompile");
- goto eexit;
- }
-
- memset(&ifr, 0, sizeof(ifr));
- strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
- if (ioctl(fd, BIOCSETIF, &ifr) == -1)
- goto eexit;
-
- /* Get the required BPF buffer length from the kernel. */
- if (ioctl(fd, BIOCGBLEN, &ibuf_len) == -1)
- goto eexit;
- buf_len = (size_t)ibuf_len;
- if (state->buffer_size != buf_len) {
- free(state->buffer);
- state->buffer = malloc(buf_len);
- if (state->buffer == NULL)
- goto eexit;
- state->buffer_size = buf_len;
- state->buffer_len = state->buffer_pos = 0;
- }
-
-#ifdef BIOCIMMEDIATE
- flags = 1;
- if (ioctl(fd, BIOCIMMEDIATE, &flags) == -1)
- goto eexit;
-#endif
-
- /* Install the DHCP filter */
- if (protocol == ETHERTYPE_ARP) {
- pf.bf_insns = UNCONST(arp_bpf_filter);
- pf.bf_len = arp_bpf_filter_len;
- } else {
- pf.bf_insns = UNCONST(dhcp_bpf_filter);
- pf.bf_len = dhcp_bpf_filter_len;
- }
- if (ioctl(fd, BIOCSETF, &pf) == -1)
- goto eexit;
-
-#ifdef __OpenBSD__
- /* For some reason OpenBSD fails to open the fd as non blocking */
- if ((flags = fcntl(fd, F_GETFL, 0)) == -1 ||
- fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
- goto eexit;
-#endif
-
- return fd;
-
-eexit:
- free(state->buffer);
- state->buffer = NULL;
- close(fd);
- return -1;
-}
-
-ssize_t
-ipv4_sendrawpacket(const struct interface *ifp, int protocol,
- const void *data, size_t len)
-{
- struct iovec iov[2];
- struct ether_header hw;
- int fd;
- const struct dhcp_state *state;
-
- memset(&hw, 0, ETHER_HDR_LEN);
- memset(&hw.ether_dhost, 0xff, ETHER_ADDR_LEN);
- hw.ether_type = htons(protocol);
- iov[0].iov_base = &hw;
- iov[0].iov_len = ETHER_HDR_LEN;
- iov[1].iov_base = UNCONST(data);
- iov[1].iov_len = len;
- state = D_CSTATE(ifp);
- if (protocol == ETHERTYPE_ARP)
- fd = state->arp_fd;
- else
- fd = state->raw_fd;
- return writev(fd, iov, 2);
-}
-
-/* BPF requires that we read the entire buffer.
- * So we pass the buffer in the API so we can loop on >1 packet. */
-ssize_t
-ipv4_getrawpacket(struct interface *ifp, int protocol,
- void *data, size_t len, int *partialcsum)
-{
- int fd = -1;
- struct bpf_hdr packet;
- ssize_t bytes;
- const unsigned char *payload;
- struct dhcp_state *state;
-
- state = D_STATE(ifp);
- if (protocol == ETHERTYPE_ARP)
- fd = state->arp_fd;
- else
- fd = state->raw_fd;
-
- if (partialcsum != NULL)
- *partialcsum = 0; /* Not supported on BSD */
-
- for (;;) {
- if (state->buffer_len == 0) {
- bytes = read(fd, state->buffer, state->buffer_size);
- if (bytes == -1)
- return errno == EAGAIN ? 0 : -1;
- else if ((size_t)bytes < sizeof(packet))
- return -1;
- state->buffer_len = (size_t)bytes;
- state->buffer_pos = 0;
- }
- bytes = -1;
- memcpy(&packet, state->buffer + state->buffer_pos,
- sizeof(packet));
- if (packet.bh_caplen != packet.bh_datalen)
- goto next; /* Incomplete packet, drop. */
- if (state->buffer_pos + packet.bh_caplen + packet.bh_hdrlen >
- state->buffer_len)
- goto next; /* Packet beyond buffer, drop. */
- payload = state->buffer + state->buffer_pos +
- packet.bh_hdrlen + ETHER_HDR_LEN;
- bytes = (ssize_t)packet.bh_caplen - ETHER_HDR_LEN;
- if ((size_t)bytes > len)
- bytes = (ssize_t)len;
- memcpy(data, payload, (size_t)bytes);
-next:
- state->buffer_pos += BPF_WORDALIGN(packet.bh_hdrlen +
- packet.bh_caplen);
- if (state->buffer_pos >= state->buffer_len)
- state->buffer_len = state->buffer_pos = 0;
- if (bytes != -1)
- return bytes;
- }
-}
;;
kfreebsd*)
echo "CPPFLAGS+= -D_GNU_SOURCE" >>$CONFIG_MK
- if [ -z "$INET" -o "$INET" = yes ]; then
- echo "DHCPCD_SRCS+= bpf.c" >>$CONFIG_MK
- fi
- echo "DHCPCD_SRCS+= if-bsd.c platform-bsd.c" >>$CONFIG_MK
+ echo "DHCPCD_SRCS+= if-bsd.c" >>$CONFIG_MK
echo "COMPAT_SRCS+= compat/linkaddr.c" >>$CONFIG_MK
;;
*)
- if [ -z "$INET" -o "$INET" = yes ]; then
- echo "DHCPCD_SRCS+= bpf.c" >>$CONFIG_MK
- fi
- echo "DHCPCD_SRCS+= if-bsd.c platform-bsd.c" >>$CONFIG_MK
+ echo "DHCPCD_SRCS+= if-bsd.c" >>$CONFIG_MK
;;
esac
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
+#include <sys/time.h>
#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/utsname.h>
#include <arpa/inet.h>
+#include <net/bpf.h>
#include <net/if.h>
#include <net/if_dl.h>
#ifdef __FreeBSD__ /* Needed so that including netinet6/in6_var.h works */
#include <net/route.h>
#include <netinet/in.h>
#include <netinet6/in6_var.h>
+#include <netinet6/nd6.h>
#ifdef __DragonFly__
# include <netproto/802_11/ieee80211_ioctl.h>
#elif __APPLE__
#include "if-options.h"
#include "ipv4.h"
#include "ipv6.h"
+#include "platform.h"
+
+#include "bpf-filter.h"
#ifndef RT_ROUNDUP
#define RT_ROUNDUP(a) \
#ifdef INET
int
+ipv4_opensocket(struct interface *ifp, int protocol)
+{
+ struct dhcp_state *state;
+ int fd = -1;
+ struct ifreq ifr;
+ int ibuf_len = 0;
+ size_t buf_len;
+ struct bpf_version pv;
+ struct bpf_program pf;
+#ifdef BIOCIMMEDIATE
+ int flags;
+#endif
+#ifdef _PATH_BPF
+ fd = open(_PATH_BPF, O_RDWR | O_CLOEXEC | O_NONBLOCK);
+#else
+ char device[32];
+ int n = 0;
+
+ do {
+ snprintf(device, sizeof(device), "/dev/bpf%d", n++);
+ fd = open(device, O_RDWR | O_CLOEXEC | O_NONBLOCK);
+ } while (fd == -1 && errno == EBUSY);
+#endif
+
+ if (fd == -1)
+ return -1;
+
+ state = D_STATE(ifp);
+
+ if (ioctl(fd, BIOCVERSION, &pv) == -1)
+ goto eexit;
+ if (pv.bv_major != BPF_MAJOR_VERSION ||
+ pv.bv_minor < BPF_MINOR_VERSION) {
+ syslog(LOG_ERR, "BPF version mismatch - recompile");
+ goto eexit;
+ }
+
+ memset(&ifr, 0, sizeof(ifr));
+ strlcpy(ifr.ifr_name, ifp->name, sizeof(ifr.ifr_name));
+ if (ioctl(fd, BIOCSETIF, &ifr) == -1)
+ goto eexit;
+
+ /* Get the required BPF buffer length from the kernel. */
+ if (ioctl(fd, BIOCGBLEN, &ibuf_len) == -1)
+ goto eexit;
+ buf_len = (size_t)ibuf_len;
+ if (state->buffer_size != buf_len) {
+ free(state->buffer);
+ state->buffer = malloc(buf_len);
+ if (state->buffer == NULL)
+ goto eexit;
+ state->buffer_size = buf_len;
+ state->buffer_len = state->buffer_pos = 0;
+ }
+
+#ifdef BIOCIMMEDIATE
+ flags = 1;
+ if (ioctl(fd, BIOCIMMEDIATE, &flags) == -1)
+ goto eexit;
+#endif
+
+ /* Install the DHCP filter */
+ if (protocol == ETHERTYPE_ARP) {
+ pf.bf_insns = UNCONST(arp_bpf_filter);
+ pf.bf_len = arp_bpf_filter_len;
+ } else {
+ pf.bf_insns = UNCONST(dhcp_bpf_filter);
+ pf.bf_len = dhcp_bpf_filter_len;
+ }
+ if (ioctl(fd, BIOCSETF, &pf) == -1)
+ goto eexit;
+
+#ifdef __OpenBSD__
+ /* For some reason OpenBSD fails to open the fd as non blocking */
+ if ((flags = fcntl(fd, F_GETFL, 0)) == -1 ||
+ fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
+ goto eexit;
+#endif
+
+ return fd;
+
+eexit:
+ free(state->buffer);
+ state->buffer = NULL;
+ close(fd);
+ return -1;
+}
+
+ssize_t
+ipv4_sendrawpacket(const struct interface *ifp, int protocol,
+ const void *data, size_t len)
+{
+ struct iovec iov[2];
+ struct ether_header hw;
+ int fd;
+ const struct dhcp_state *state;
+
+ memset(&hw, 0, ETHER_HDR_LEN);
+ memset(&hw.ether_dhost, 0xff, ETHER_ADDR_LEN);
+ hw.ether_type = htons(protocol);
+ iov[0].iov_base = &hw;
+ iov[0].iov_len = ETHER_HDR_LEN;
+ iov[1].iov_base = UNCONST(data);
+ iov[1].iov_len = len;
+ state = D_CSTATE(ifp);
+ if (protocol == ETHERTYPE_ARP)
+ fd = state->arp_fd;
+ else
+ fd = state->raw_fd;
+ return writev(fd, iov, 2);
+}
+
+/* BPF requires that we read the entire buffer.
+ * So we pass the buffer in the API so we can loop on >1 packet. */
+ssize_t
+ipv4_getrawpacket(struct interface *ifp, int protocol,
+ void *data, size_t len, int *partialcsum)
+{
+ int fd = -1;
+ struct bpf_hdr packet;
+ ssize_t bytes;
+ const unsigned char *payload;
+ struct dhcp_state *state;
+
+ state = D_STATE(ifp);
+ if (protocol == ETHERTYPE_ARP)
+ fd = state->arp_fd;
+ else
+ fd = state->raw_fd;
+
+ if (partialcsum != NULL)
+ *partialcsum = 0; /* Not supported on BSD */
+
+ for (;;) {
+ if (state->buffer_len == 0) {
+ bytes = read(fd, state->buffer, state->buffer_size);
+ if (bytes == -1)
+ return errno == EAGAIN ? 0 : -1;
+ else if ((size_t)bytes < sizeof(packet))
+ return -1;
+ state->buffer_len = (size_t)bytes;
+ state->buffer_pos = 0;
+ }
+ bytes = -1;
+ memcpy(&packet, state->buffer + state->buffer_pos,
+ sizeof(packet));
+ if (packet.bh_caplen != packet.bh_datalen)
+ goto next; /* Incomplete packet, drop. */
+ if (state->buffer_pos + packet.bh_caplen + packet.bh_hdrlen >
+ state->buffer_len)
+ goto next; /* Packet beyond buffer, drop. */
+ payload = state->buffer + state->buffer_pos +
+ packet.bh_hdrlen + ETHER_HDR_LEN;
+ bytes = (ssize_t)packet.bh_caplen - ETHER_HDR_LEN;
+ if ((size_t)bytes > len)
+ bytes = (ssize_t)len;
+ memcpy(data, payload, (size_t)bytes);
+next:
+ state->buffer_pos += BPF_WORDALIGN(packet.bh_hdrlen +
+ packet.bh_caplen);
+ if (state->buffer_pos >= state->buffer_len)
+ state->buffer_len = state->buffer_pos = 0;
+ if (bytes != -1)
+ return bytes;
+ }
+}
+int
if_address(const struct interface *iface, const struct in_addr *address,
const struct in_addr *netmask, const struct in_addr *broadcast,
int action)
}
}
}
+
+#ifndef SYS_NMLN /* OSX */
+# define SYS_NMLN 256
+#endif
+#ifndef HW_MACHINE_ARCH
+# ifdef HW_MODEL /* OpenBSD */
+# define HW_MACHINE_ARCH HW_MODEL
+# endif
+#endif
+int
+hardware_platform(char *str, size_t len)
+{
+ int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
+ char march[SYS_NMLN];
+ size_t marchlen = sizeof(march);
+
+ if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
+ march, &marchlen, NULL, 0) != 0)
+ return -1;
+ return snprintf(str, len, ":%s", march);
+}
+
+#ifdef INET6
+#define get_inet6_sysctl(code) inet6_sysctl(code, 0, 0)
+#define set_inet6_sysctl(code, val) inet6_sysctl(code, val, 1)
+static int
+inet6_sysctl(int code, int val, int action)
+{
+ int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
+ size_t size;
+
+ mib[3] = code;
+ size = sizeof(val);
+ if (action) {
+ if (sysctl(mib, sizeof(mib)/sizeof(mib[0]),
+ NULL, 0, &val, size) == -1)
+ return -1;
+ return 0;
+ }
+ if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &val, &size, NULL, 0) == -1)
+ return -1;
+ return val;
+}
+
+#define del_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, -1)
+#define get_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, 0)
+#define set_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, 1)
+static int
+if_nd6_flag(const char *ifname, unsigned int flag, int set)
+{
+ int s, error;
+ struct in6_ndireq nd;
+ unsigned int oflags;
+
+ if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) == -1)
+ return -1;
+ memset(&nd, 0, sizeof(nd));
+ strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
+ if ((error = ioctl(s, SIOCGIFINFO_IN6, &nd)) == -1)
+ goto eexit;
+ if (set == 0) {
+ close(s);
+ return nd.ndi.flags & flag ? 1 : 0;
+ }
+
+ oflags = nd.ndi.flags;
+ if (set == -1)
+ nd.ndi.flags &= ~flag;
+ else
+ nd.ndi.flags |= flag;
+ if (oflags == nd.ndi.flags)
+ error = 0;
+ else
+ error = ioctl(s, SIOCSIFINFO_FLAGS, &nd);
+
+eexit:
+ close(s);
+ return error;
+}
+
+void
+restore_kernel_ra(struct dhcpcd_ctx *ctx)
+{
+
+ if (ctx->options & DHCPCD_FORKED)
+ return;
+
+ for (; ctx->ra_restore_len > 0; ctx->ra_restore_len--) {
+ if (!(ctx->options & DHCPCD_FORKED)) {
+ syslog(LOG_INFO, "%s: restoring kernel IPv6 RA support",
+ ctx->ra_restore[ctx->ra_restore_len - 1]);
+ if (set_if_nd6_flag(
+ ctx->ra_restore[ctx->ra_restore_len -1],
+ ND6_IFF_ACCEPT_RTADV) == -1)
+ syslog(LOG_ERR, "%s: del_if_nd6_flag: %m",
+ ctx->ra_restore[ctx->ra_restore_len - 1]);
+ }
+ free(ctx->ra_restore[ctx->ra_restore_len - 1]);
+ }
+ free(ctx->ra_restore);
+ ctx->ra_restore = NULL;
+
+ if (ctx->ra_kernel_set) {
+ syslog(LOG_INFO, "restoring kernel IPv6 RA support");
+ if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 1) == -1)
+ syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
+ }
+}
+
+static int
+ipv6_ra_flush(void)
+{
+ int s;
+ char dummy[IFNAMSIZ + 8];
+
+ s = socket(AF_INET6, SOCK_DGRAM, 0);
+ if (s == -1)
+ return -1;
+ strlcpy(dummy, "lo0", sizeof(dummy));
+ if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummy) == -1)
+ syslog(LOG_ERR, "SIOSRTRFLUSH_IN6: %m");
+ if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummy) == -1)
+ syslog(LOG_ERR, "SIOSPFXFLUSH_IN6: %m");
+ close(s);
+ return 0;
+}
+
+int
+check_ipv6(struct dhcpcd_ctx *ctx, const char *ifname, int own)
+{
+ int ra;
+
+ if (ifname) {
+#ifdef ND6_IFF_ACCEPT_RTADV
+ size_t i;
+ char *p, **nrest;
+#endif
+
+#ifdef ND_IFF_AUTO_LINKLOCAL
+ if (set_if_nd6_flag(ifname, ND6_IFF_AUTO_LINKLOCAL) == -1) {
+ syslog(LOG_ERR, "%s: set_if_nd6_flag: %m", ifname);
+ return -1;
+ }
+#endif
+
+#ifdef ND6_IFF_IFDISABLED
+ if (del_if_nd6_flag(ifname, ND6_IFF_IFDISABLED) == -1) {
+ syslog(LOG_ERR, "%s: del_if_nd6_flag: %m", ifname);
+ return -1;
+ }
+#endif
+
+#ifdef ND6_IFF_ACCEPT_RTADV
+ ra = get_if_nd6_flag(ifname, ND6_IFF_ACCEPT_RTADV);
+ if (ra == -1)
+ syslog(LOG_ERR, "%s: get_if_nd6_flag: %m", ifname);
+ else if (ra != 0 && own) {
+ syslog(LOG_INFO,
+ "%s: disabling Kernel IPv6 RA support",
+ ifname);
+ if (del_if_nd6_flag(ifname, ND6_IFF_ACCEPT_RTADV)
+ == -1)
+ {
+ syslog(LOG_ERR, "%s: del_if_nd6_flag: %m",
+ ifname);
+ return ra;
+ }
+ for (i = 0; i < ctx->ra_restore_len; i++)
+ if (strcmp(ctx->ra_restore[i], ifname) == 0)
+ break;
+ if (i == ctx->ra_restore_len) {
+ p = strdup(ifname);
+ if (p == NULL) {
+ syslog(LOG_ERR, "%s: %m", __func__);
+ return 0;
+ }
+ nrest = realloc(ctx->ra_restore,
+ (ctx->ra_restore_len + 1) * sizeof(char *));
+ if (nrest == NULL) {
+ syslog(LOG_ERR, "%s: %m", __func__);
+ free(p);
+ return 0;
+ }
+ ctx->ra_restore = nrest;
+ ctx->ra_restore[ctx->ra_restore_len++] = p;
+ }
+ return 0;
+ }
+ return ra;
+#else
+ return ctx->ra_global;
+#endif
+ }
+
+ ra = get_inet6_sysctl(IPV6CTL_ACCEPT_RTADV);
+ if (ra == -1)
+ /* The sysctl probably doesn't exist, but this isn't an
+ * error as such so just log it and continue */
+ syslog(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
+ "IPV6CTL_ACCEPT_RTADV: %m");
+ else if (ra != 0 && own) {
+ syslog(LOG_INFO, "disabling Kernel IPv6 RA support");
+ if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 0) == -1) {
+ syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
+ return ra;
+ }
+ ra = 0;
+ ctx->ra_kernel_set = 1;
+
+ /* Flush the kernel knowledge of advertised routers
+ * and prefixes so the kernel does not expire prefixes
+ * and default routes we are trying to own. */
+ ipv6_ra_flush();
+ }
+
+ ctx->ra_global = ra;
+ return ra;
+}
+
+int
+ipv6_dadtransmits(__unused const char *ifname)
+{
+ int r;
+
+ r = get_inet6_sysctl(IPV6CTL_DAD_COUNT);
+ return r < 0 ? 0 : r;
+}
+#endif
+++ /dev/null
-/*
- * dhcpcd - DHCP client daemon
- * Copyright (c) 2006-2014 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/ioctl.h>
-#include <sys/param.h>
-#include <sys/socket.h>
-#include <sys/sysctl.h>
-#include <sys/utsname.h>
-
-#include <net/if.h>
-#ifdef __FreeBSD__ /* Needed so that including netinet6/in6_var.h works */
-# include <net/if_var.h>
-#endif
-#include <netinet/in.h>
-#include <netinet6/in6_var.h>
-#include <netinet6/nd6.h>
-
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <unistd.h>
-
-#include "common.h"
-#include "dhcpcd.h"
-#include "if-options.h"
-#include "platform.h"
-
-#ifndef SYS_NMLN /* OSX */
-# define SYS_NMLN 256
-#endif
-
-#ifndef HW_MACHINE_ARCH
-# ifdef HW_MODEL /* OpenBSD */
-# define HW_MACHINE_ARCH HW_MODEL
-# endif
-#endif
-
-int
-hardware_platform(char *str, size_t len)
-{
- int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
- char march[SYS_NMLN];
- size_t marchlen = sizeof(march);
-
- if (sysctl(mib, sizeof(mib) / sizeof(mib[0]),
- march, &marchlen, NULL, 0) != 0)
- return -1;
- return snprintf(str, len, ":%s", march);
-}
-
-#ifdef INET6
-#define get_inet6_sysctl(code) inet6_sysctl(code, 0, 0)
-#define set_inet6_sysctl(code, val) inet6_sysctl(code, val, 1)
-static int
-inet6_sysctl(int code, int val, int action)
-{
- int mib[] = { CTL_NET, PF_INET6, IPPROTO_IPV6, 0 };
- size_t size;
-
- mib[3] = code;
- size = sizeof(val);
- if (action) {
- if (sysctl(mib, sizeof(mib)/sizeof(mib[0]),
- NULL, 0, &val, size) == -1)
- return -1;
- return 0;
- }
- if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &val, &size, NULL, 0) == -1)
- return -1;
- return val;
-}
-
-#define del_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, -1)
-#define get_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, 0)
-#define set_if_nd6_flag(ifname, flag) if_nd6_flag(ifname, flag, 1)
-static int
-if_nd6_flag(const char *ifname, unsigned int flag, int set)
-{
- int s, error;
- struct in6_ndireq nd;
- unsigned int oflags;
-
- if ((s = socket(AF_INET6, SOCK_DGRAM, 0)) == -1)
- return -1;
- memset(&nd, 0, sizeof(nd));
- strlcpy(nd.ifname, ifname, sizeof(nd.ifname));
- if ((error = ioctl(s, SIOCGIFINFO_IN6, &nd)) == -1)
- goto eexit;
- if (set == 0) {
- close(s);
- return nd.ndi.flags & flag ? 1 : 0;
- }
-
- oflags = nd.ndi.flags;
- if (set == -1)
- nd.ndi.flags &= ~flag;
- else
- nd.ndi.flags |= flag;
- if (oflags == nd.ndi.flags)
- error = 0;
- else
- error = ioctl(s, SIOCSIFINFO_FLAGS, &nd);
-
-eexit:
- close(s);
- return error;
-}
-
-void
-restore_kernel_ra(struct dhcpcd_ctx *ctx)
-{
-
- if (ctx->options & DHCPCD_FORKED)
- return;
-
- for (; ctx->ra_restore_len > 0; ctx->ra_restore_len--) {
- if (!(ctx->options & DHCPCD_FORKED)) {
- syslog(LOG_INFO, "%s: restoring kernel IPv6 RA support",
- ctx->ra_restore[ctx->ra_restore_len - 1]);
- if (set_if_nd6_flag(
- ctx->ra_restore[ctx->ra_restore_len -1],
- ND6_IFF_ACCEPT_RTADV) == -1)
- syslog(LOG_ERR, "%s: del_if_nd6_flag: %m",
- ctx->ra_restore[ctx->ra_restore_len - 1]);
- }
- free(ctx->ra_restore[ctx->ra_restore_len - 1]);
- }
- free(ctx->ra_restore);
- ctx->ra_restore = NULL;
-
- if (ctx->ra_kernel_set) {
- syslog(LOG_INFO, "restoring kernel IPv6 RA support");
- if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 1) == -1)
- syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
- }
-}
-
-static int
-ipv6_ra_flush(void)
-{
- int s;
- char dummy[IFNAMSIZ + 8];
-
- s = socket(AF_INET6, SOCK_DGRAM, 0);
- if (s == -1)
- return -1;
- strlcpy(dummy, "lo0", sizeof(dummy));
- if (ioctl(s, SIOCSRTRFLUSH_IN6, (caddr_t)&dummy) == -1)
- syslog(LOG_ERR, "SIOSRTRFLUSH_IN6: %m");
- if (ioctl(s, SIOCSPFXFLUSH_IN6, (caddr_t)&dummy) == -1)
- syslog(LOG_ERR, "SIOSPFXFLUSH_IN6: %m");
- close(s);
- return 0;
-}
-
-int
-check_ipv6(struct dhcpcd_ctx *ctx, const char *ifname, int own)
-{
- int ra;
-
- if (ifname) {
-#ifdef ND6_IFF_ACCEPT_RTADV
- size_t i;
- char *p, **nrest;
-#endif
-
-#ifdef ND_IFF_AUTO_LINKLOCAL
- if (set_if_nd6_flag(ifname, ND6_IFF_AUTO_LINKLOCAL) == -1) {
- syslog(LOG_ERR, "%s: set_if_nd6_flag: %m", ifname);
- return -1;
- }
-#endif
-
-#ifdef ND6_IFF_IFDISABLED
- if (del_if_nd6_flag(ifname, ND6_IFF_IFDISABLED) == -1) {
- syslog(LOG_ERR, "%s: del_if_nd6_flag: %m", ifname);
- return -1;
- }
-#endif
-
-#ifdef ND6_IFF_ACCEPT_RTADV
- ra = get_if_nd6_flag(ifname, ND6_IFF_ACCEPT_RTADV);
- if (ra == -1)
- syslog(LOG_ERR, "%s: get_if_nd6_flag: %m", ifname);
- else if (ra != 0 && own) {
- syslog(LOG_INFO,
- "%s: disabling Kernel IPv6 RA support",
- ifname);
- if (del_if_nd6_flag(ifname, ND6_IFF_ACCEPT_RTADV)
- == -1)
- {
- syslog(LOG_ERR, "%s: del_if_nd6_flag: %m",
- ifname);
- return ra;
- }
- for (i = 0; i < ctx->ra_restore_len; i++)
- if (strcmp(ctx->ra_restore[i], ifname) == 0)
- break;
- if (i == ctx->ra_restore_len) {
- p = strdup(ifname);
- if (p == NULL) {
- syslog(LOG_ERR, "%s: %m", __func__);
- return 0;
- }
- nrest = realloc(ctx->ra_restore,
- (ctx->ra_restore_len + 1) * sizeof(char *));
- if (nrest == NULL) {
- syslog(LOG_ERR, "%s: %m", __func__);
- free(p);
- return 0;
- }
- ctx->ra_restore = nrest;
- ctx->ra_restore[ctx->ra_restore_len++] = p;
- }
- return 0;
- }
- return ra;
-#else
- return ctx->ra_global;
-#endif
- }
-
- ra = get_inet6_sysctl(IPV6CTL_ACCEPT_RTADV);
- if (ra == -1)
- /* The sysctl probably doesn't exist, but this isn't an
- * error as such so just log it and continue */
- syslog(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
- "IPV6CTL_ACCEPT_RTADV: %m");
- else if (ra != 0 && own) {
- syslog(LOG_INFO, "disabling Kernel IPv6 RA support");
- if (set_inet6_sysctl(IPV6CTL_ACCEPT_RTADV, 0) == -1) {
- syslog(LOG_ERR, "IPV6CTL_ACCEPT_RTADV: %m");
- return ra;
- }
- ra = 0;
- ctx->ra_kernel_set = 1;
-
- /* Flush the kernel knowledge of advertised routers
- * and prefixes so the kernel does not expire prefixes
- * and default routes we are trying to own. */
- ipv6_ra_flush();
- }
-
- ctx->ra_global = ra;
- return ra;
-}
-
-int
-ipv6_dadtransmits(__unused const char *ifname)
-{
- int r;
-
- r = get_inet6_sysctl(IPV6CTL_DAD_COUNT);
- return r < 0 ? 0 : r;
-}
-#endif
projects / thirdparty / dhcpcd.git / commitdiff
