1 files changed, 265 insertions, 0 deletions
diff --git a/src/if.h b/src/if.h
new file mode 100644
index 000000000000..d24fbc92cf48
--- /dev/null
+++ b/src/if.h
@@ -0,0 +1,265 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+/*
+ * dhcpcd - DHCP client daemon
+ * Copyright (c) 2006-2021 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.
+ */
+
+#ifndef INTERFACE_H
+#define INTERFACE_H
+
+#include <net/if.h>
+#include <net/route.h>		/* for RTM_ADD et all */
+#include <netinet/in.h>
+#ifdef BSD
+#include <netinet/in_var.h>	/* for IN_IFF_TENTATIVE et all */
+#endif
+
+#include <ifaddrs.h>
+
+/* If the interface does not support carrier status (ie PPP),
+ * dhcpcd can poll it for the relevant flags periodically */
+#define IF_POLL_UP	100	/* milliseconds */
+
+/*
+ * Systems which handle 1 address per alias.
+ * Currenly this is just Solaris.
+ * While Linux can do aliased addresses, it is only useful for their
+ * legacy ifconfig(8) tool which cannot display >1 IPv4 address
+ * (it can display many IPv6 addresses which makes the limitation odd).
+ * Linux has ip(8) which is a more feature rich tool, without the above
+ * restriction.
+ */
+#ifndef ALIAS_ADDR
+#  ifdef __sun
+#    define ALIAS_ADDR
+#  endif
+#endif
+
+#include "config.h"
+
+/* POSIX defines ioctl request as an int, which Solaris and musl use.
+ * Everyone else use an unsigned long, which happens to be the bigger one
+ * so we use that in our on wire API. */
+#ifdef IOCTL_REQUEST_TYPE
+typedef IOCTL_REQUEST_TYPE	ioctl_request_t;
+#else
+typedef unsigned long		ioctl_request_t;
+#endif
+
+#include "dhcpcd.h"
+#include "ipv4.h"
+#include "ipv6.h"
+#include "route.h"
+
+#define EUI64_ADDR_LEN			8
+#define INFINIBAND_ADDR_LEN		20
+
+/* Linux 2.4 doesn't define this */
+#ifndef ARPHRD_IEEE1394
+#  define ARPHRD_IEEE1394		24
+#endif
+
+/* The BSD's don't define this yet */
+#ifndef ARPHRD_INFINIBAND
+#  define ARPHRD_INFINIBAND		32
+#endif
+
+/* Maximum frame length.
+ * Support jumbo frames and some extra. */
+#define	FRAMEHDRLEN_MAX			14	/* only ethernet support */
+#define	FRAMELEN_MAX			(FRAMEHDRLEN_MAX + 9216)
+
+#define UDPLEN_MAX			64 * 1024
+
+/* Work out if we have a private address or not
+ * 10/8
+ * 172.16/12
+ * 192.168/16
+ */
+#ifndef IN_PRIVATE
+# define IN_PRIVATE(addr) (((addr & IN_CLASSA_NET) == 0x0a000000) ||	      \
+	    ((addr & 0xfff00000)    == 0xac100000) ||			      \
+	    ((addr & IN_CLASSB_NET) == 0xc0a80000))
+#endif
+
+#ifndef CLLADDR
+#ifdef AF_LINK
+#  define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen)
+#endif
+#endif
+
+#ifdef __sun
+/* Solaris stupidly defines this for compat with BSD
+ * but then ignores it. */
+#undef RTF_CLONING
+
+/* This interface is busted on DilOS at least.
+ * It used to work, but lukily Solaris can fall back to
+ * IP_PKTINFO. */
+#undef IP_RECVIF
+
+/* Solaris getifaddrs is very un-suitable for dhcpcd.
+ * See if-sun.c for details why. */
+struct ifaddrs;
+int if_getifaddrs(struct ifaddrs **);
+#define	getifaddrs	if_getifaddrs
+int if_getsubnet(struct dhcpcd_ctx *, const char *, int, void *, size_t);
+#endif
+
+int if_ioctl(struct dhcpcd_ctx *, ioctl_request_t, void *, size_t);
+#ifdef HAVE_PLEDGE
+#define	pioctl(ctx, req, data, len) if_ioctl((ctx), (req), (data), (len))
+#else
+#define	pioctl(ctx, req, data, len) ioctl((ctx)->pf_inet_fd, (req),(data),(len))
+#endif
+int if_getflags(struct interface *);
+int if_setflag(struct interface *, short, short);
+#define if_up(ifp) if_setflag((ifp), (IFF_UP | IFF_RUNNING), 0)
+#define if_down(ifp) if_setflag((ifp), 0, IFF_UP);
+bool if_is_link_up(const struct interface *);
+bool if_valid_hwaddr(const uint8_t *, size_t);
+struct if_head *if_discover(struct dhcpcd_ctx *, struct ifaddrs **,
+    int, char * const *);
+void if_markaddrsstale(struct if_head *);
+void if_learnaddrs(struct dhcpcd_ctx *, struct if_head *, struct ifaddrs **);
+void if_deletestaleaddrs(struct if_head *);
+struct interface *if_find(struct if_head *, const char *);
+struct interface *if_findindex(struct if_head *, unsigned int);
+struct interface *if_loopback(struct dhcpcd_ctx *);
+void if_free(struct interface *);
+int if_domtu(const struct interface *, short int);
+#define if_getmtu(ifp) if_domtu((ifp), 0)
+#define if_setmtu(ifp, mtu) if_domtu((ifp), (mtu))
+int if_carrier(struct interface *, const void *);
+bool if_roaming(struct interface *);
+
+#ifdef ALIAS_ADDR
+int if_makealias(char *, size_t, const char *, int);
+#endif
+
+int if_mtu_os(const struct interface *);
+
+/*
+ * Helper to decode an interface name of bge0:1 to
+ * devname = bge0, drvname = bge0, ppa = 0, lun = 1.
+ * If ppa or lun are invalid they are set to -1.
+ */
+struct if_spec {
+	char ifname[IF_NAMESIZE];
+	char devname[IF_NAMESIZE];
+	char drvname[IF_NAMESIZE];
+	int ppa;
+	int vlid;
+	int lun;
+};
+int if_nametospec(const char *, struct if_spec *);
+
+/* The below functions are provided by if-KERNEL.c */
+int os_init(void);
+int if_conf(struct interface *);
+int if_init(struct interface *);
+int if_getssid(struct interface *);
+int if_ignoregroup(int, const char *);
+bool if_ignore(struct dhcpcd_ctx *, const char *);
+int if_vimaster(struct dhcpcd_ctx *ctx, const char *);
+unsigned short if_vlanid(const struct interface *);
+char * if_getnetworknamespace(char *, size_t);
+int if_opensockets(struct dhcpcd_ctx *);
+int if_opensockets_os(struct dhcpcd_ctx *);
+void if_closesockets(struct dhcpcd_ctx *);
+void if_closesockets_os(struct dhcpcd_ctx *);
+int if_handlelink(struct dhcpcd_ctx *);
+int if_randomisemac(struct interface *);
+int if_setmac(struct interface *ifp, void *, uint8_t);
+
+/* dhcpcd uses the same routing flags as BSD.
+ * If the platform doesn't use these flags,
+ * map them in the platform interace file. */
+#ifndef RTM_ADD
+#define RTM_ADD		0x1	/* Add Route */
+#define RTM_DELETE	0x2	/* Delete Route */
+#define RTM_CHANGE	0x3	/* Change Metrics or flags */
+#define RTM_GET		0x4	/* Report Metrics */
+#endif
+
+/* Define SOCK_CLOEXEC and SOCK_NONBLOCK for systems that lack it.
+ * xsocket() in if.c will map them to fctnl FD_CLOEXEC and O_NONBLOCK. */
+#ifdef SOCK_CLOEXEC
+# define HAVE_SOCK_CLOEXEC
+#else
+# define SOCK_CLOEXEC	0x10000000
+#endif
+#ifdef SOCK_NONBLOCK
+# define HAVE_SOCK_NONBLOCK
+#else
+# define SOCK_NONBLOCK	0x20000000
+#endif
+#ifndef SOCK_CXNB
+#define	SOCK_CXNB	SOCK_CLOEXEC | SOCK_NONBLOCK
+#endif
+int xsocket(int, int, int);
+int xsocketpair(int, int, int, int[2]);
+
+int if_route(unsigned char, const struct rt *rt);
+int if_initrt(struct dhcpcd_ctx *, rb_tree_t *, int);
+
+int if_missfilter(struct interface *, struct sockaddr *);
+int if_missfilter_apply(struct dhcpcd_ctx *);
+
+#ifdef INET
+int if_address(unsigned char, const struct ipv4_addr *);
+int if_addrflags(const struct interface *, const struct in_addr *,
+    const char *);
+
+#endif
+
+#ifdef INET6
+void if_disable_rtadv(void);
+void if_setup_inet6(const struct interface *);
+int ip6_forwarding(const char *ifname);
+
+struct ra;
+struct ipv6_addr;
+
+int if_applyra(const struct ra *);
+int if_address6(unsigned char, const struct ipv6_addr *);
+int if_addrflags6(const struct interface *, const struct in6_addr *,
+    const char *);
+int if_getlifetime6(struct ipv6_addr *);
+
+#else
+#define if_checkipv6(a, b, c) (-1)
+#endif
+
+int if_machinearch(char *, size_t);
+struct interface *if_findifpfromcmsg(struct dhcpcd_ctx *,
+    struct msghdr *, int *);
+
+#ifdef __linux__
+int if_linksocket(struct sockaddr_nl *, int, int);
+int if_getnetlink(struct dhcpcd_ctx *, struct iovec *, int, int,
+    int (*)(struct dhcpcd_ctx *, void *, struct nlmsghdr *), void *);
+#endif
+#endif