From: David van Moolenbroek Date: Wed, 15 Feb 2017 13:02:59 +0000 (+0000) Subject: Import NetBSD arp(8) X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/zlib_tech.html?a=commitdiff_plain;h=refs%2Fchanges%2F59%2F3459%2F1;p=minix.git Import NetBSD arp(8) Behaviorally this port should already be largely on par with the NetBSD 8 version, in that it sets the RTF_LLDATA flag on routing socket requests to indicate that they target link-local data. Many parts of the arp(8) functionality are currently not yet supported by the operating system, largely due to lwIP not exposing appropriate means of implementing them. Change-Id: Icfac054b4deddda03eee4acf0e261aa48cd031ba --- diff --git a/distrib/sets/lists/minix-base/mi b/distrib/sets/lists/minix-base/mi index 8e9ff7ad2..f2aad5e02 100644 --- a/distrib/sets/lists/minix-base/mi +++ b/distrib/sets/lists/minix-base/mi @@ -1010,6 +1010,7 @@ ./usr/preserve minix-base ./usr/run minix-base ./usr/sbin minix-base +./usr/sbin/arp minix-base ./usr/sbin/audit-packages minix-base crypto ./usr/sbin/bpm minix-base crypto ./usr/sbin/btrace minix-base diff --git a/distrib/sets/lists/minix-debug/mi b/distrib/sets/lists/minix-debug/mi index 287f2e692..46f0f148b 100644 --- a/distrib/sets/lists/minix-debug/mi +++ b/distrib/sets/lists/minix-debug/mi @@ -591,6 +591,7 @@ ./usr/libdata/debug/usr/libexec/rshd.debug minix-debug debug ./usr/libdata/debug/usr/mdec minix-debug ./usr/libdata/debug/usr/sbin minix-debug +./usr/libdata/debug/usr/sbin/arp.debug minix-debug debug ./usr/libdata/debug/usr/sbin/btrace.debug minix-debug debug ./usr/libdata/debug/usr/sbin/chroot.debug minix-debug debug ./usr/libdata/debug/usr/sbin/dev_mkdb.debug minix-debug debug diff --git a/distrib/sets/lists/minix-man/mi b/distrib/sets/lists/minix-man/mi index 94c511ec6..569479e0e 100644 --- a/distrib/sets/lists/minix-man/mi +++ b/distrib/sets/lists/minix-man/mi @@ -3249,6 +3249,7 @@ ./usr/man/man3/zlib.3 minix-man ./usr/man/man4 minix-man ./usr/man/man4/aha1540.4 minix-man +./usr/man/man4/arp.4 minix-man ./usr/man/man4/at.4 minix-man ./usr/man/man4/atf-test-case.4 minix-man atf ./usr/man/man4/bios.4 minix-man @@ -3377,6 +3378,7 @@ ./usr/man/man8/MAKEDEV.8 minix-man ./usr/man/man8/add_route.8 minix-man obsolete ./usr/man/man8/adduser.8 minix-man +./usr/man/man8/arp.8 minix-man ./usr/man/man8/atnormalize.8 minix-man ./usr/man/man8/autopart.8 minix-man ./usr/man/man8/backup.8 minix-man diff --git a/usr.sbin/Makefile b/usr.sbin/Makefile index 69bd004d0..fc242522b 100644 --- a/usr.sbin/Makefile +++ b/usr.sbin/Makefile @@ -3,7 +3,7 @@ .include -SUBDIR= \ +SUBDIR= arp \ \ chroot \ dev_mkdb \ diff --git a/usr.sbin/arp/Makefile b/usr.sbin/arp/Makefile new file mode 100644 index 000000000..dcb4c10c9 --- /dev/null +++ b/usr.sbin/arp/Makefile @@ -0,0 +1,15 @@ +# $NetBSD: Makefile,v 1.12 2015/07/29 06:07:35 ozaki-r Exp $ +# from: @(#)Makefile 8.2 (Berkeley) 4/18/94 + +.include + +RUMPPRG= arp +MAN= arp.4 arp.8 + +.PATH: ${.CURDIR}/../../lib/libc/net +RUMPSRCS= getifaddrs.c getnameinfo.c +.if (${MKRUMP} != "no") +CPPFLAGS+= -DRUMP_ACTION +.endif + +.include diff --git a/usr.sbin/arp/arp.4 b/usr.sbin/arp/arp.4 new file mode 100644 index 000000000..08fc0ff16 --- /dev/null +++ b/usr.sbin/arp/arp.4 @@ -0,0 +1,123 @@ +.\" $NetBSD: arp.4,v 1.10 2003/09/07 16:22:24 wiz Exp $ +.\" +.\" Copyright (c) 1985, 1986, 1988, 1994 +.\" The Regents of the University of California. 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. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" from: @(#)arp4.4 6.5 (Berkeley) 4/18/94 +.\" +.Dd April 18, 1994 +.Dt ARP 4 +.Os +.Sh NAME +.Nm arp +.Nd Address Resolution Protocol +.Sh SYNOPSIS +.In netinet/if_ether.h +.Sh DESCRIPTION +The Address Resolution Protocol (ARP) is a protocol used to dynamically +map between Internet host addresses and Ethernet addresses. +It is used by all the Ethernet interface drivers. +It is not specific to Internet protocols or to Ethernet, +but this implementation currently supports only that combination. +.Pp +ARP caches Internet-Ethernet address mappings. +When an interface requests a mapping for an address not in the cache, +ARP queues the message which requires the mapping and broadcasts +a message on the associated network requesting the address mapping. +If a response is provided, the new mapping is cached and any pending +message is transmitted. +ARP will queue at most one packet while waiting for a response to a +mapping request; +only the most recently ``transmitted'' packet is kept. +If the target host does not respond after several requests, +the host is considered to be down for a short period (normally 20 seconds), +allowing an error to be returned to transmission attempts during this +interval. +The error is +.Er EHOSTDOWN +for a non-responding destination host, and +.Er EHOSTUNREACH +for a non-responding router. +.Pp +The ARP cache is stored in the system routing table as +dynamically-created host routes. +The route to a directly-attached Ethernet network is installed as a +.Dq cloning +route (one with the +.Dv RTF_CLONING +flag set), +causing routes to individual hosts on that network to be created on +demand. +These routes time out periodically (normally 20 minutes after validated; +entries are not validated when not in use). +An entry for a host which is not responding is a +.Dq reject +route (one with the +.Dv RTF_REJECT +flag set). +.Pp +ARP entries may be added, deleted or changed with the +.Xr arp 8 +utility. +Manually-added entries may be temporary or permanent, +and may be +.Dq published , +in which case the system will respond to ARP requests for that host +as if it were the target of the request. +.Pp +In the past, +ARP was used to negotiate the use of a trailer encapsulation. +This is no longer supported. +.Pp +ARP watches passively for hosts impersonating the local host (i.e. a host +which responds to an ARP mapping request for the local host's address). +.Sh DIAGNOSTICS +.Bl -diag +.It "duplicate IP address %x sent from ethernet address %x:%x:%x:%x:%x:%x." +ARP has discovered another host on the local network which responds to +mapping requests for its own Internet address with a different Ethernet +address, generally indicating that two hosts are attempting to use the +same Internet address. +.El +.Sh SEE ALSO +.Xr inet 4 , +.Xr route 4 , +.Xr arp 8 , +.Xr ifconfig 8 , +.Xr route 8 +.sp +.Rs +.%A Plummer, D. +.%B "An Ethernet Address Resolution Protocol" +.%T RFC 826 +.Re +.Rs +.%A Leffler, S.J. +.%A Karels, M.J. +.%B "Trailer Encapsulations" +.%T RFC 893 +.Re diff --git a/usr.sbin/arp/arp.8 b/usr.sbin/arp/arp.8 new file mode 100644 index 000000000..a147887fb --- /dev/null +++ b/usr.sbin/arp/arp.8 @@ -0,0 +1,153 @@ +.\" $NetBSD: arp.8,v 1.23 2013/07/08 04:31:12 apb Exp $ +.\" +.\" Copyright (c) 1985, 1991, 1993 +.\" The Regents of the University of California. 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. +.\" 3. Neither the name of the University nor the names of its contributors +.\" may be used to endorse or promote products derived from this software +.\" without specific prior written permission. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. +.\" +.\" from: @(#)arp.8 8.2 (Berkeley) 4/27/95 +.\" +.Dd July 8, 2013 +.Dt ARP 8 +.Os +.Sh NAME +.Nm arp +.Nd address resolution display and control +.Sh SYNOPSIS +.Nm +.Op Fl n +.Ar hostname +.Nm +.Op Fl nv +.Fl a +.Nm +.Op Fl v +.Fl d +.Fl a +.Nm +.Op Fl v +.Fl d Ar hostname +.Op Cm proxy +.Nm +.Fl s Ar hostname ether_addr +.Op Cm temp +.Op Cm pub Op Cm proxy +.Nm +.Fl f Ar filename +.Sh DESCRIPTION +The +.Nm +program displays and modifies the Internet-to-Ethernet address translation +tables used by the address resolution protocol +.Pq Xr arp 4 . +With no flags, the program displays the current +.Tn ARP +entry for +.Ar hostname . +The host may be specified by name or by number, +using Internet dot notation. +.Pp +Available options: +.Bl -tag -width Ds +.It Fl a +The program displays all of the current +.Tn ARP +entries. +.It Fl d +A super-user may delete an entry for the host called +.Ar hostname +with the +.Fl d +flag. +If the +.Cm proxy +keyword is specified, only the published +.Dq proxy only +.Tn ARP +entry +for this host will be deleted. +If used with +.Fl a +instead of a +.Ar hostname , +it will delete all arp entries. +.It Fl f +Causes the file +.Ar filename +to be read and multiple entries to be set in the +.Tn ARP +tables. +Entries in the file should be of the form +.Pp +.Bd -filled -offset indent -compact +.Ar hostname ether_addr +.Op Cm temp +.Op Cm pub +.Ed +.Pp +with argument meanings as described below. +.It Fl n +Show network addresses as numbers (normally +.Nm +attempts to display addresses symbolically). +.It Fl s Ar hostname ether_addr +Create an +.Tn ARP +entry for the host called +.Ar hostname +with the Ethernet address +.Ar ether_addr . +The Ethernet address is given as six hex bytes separated by colons. +The entry will be permanent unless the word +.Cm temp +is given in the command. +If the word +.Cm pub +is given, the entry will be "published"; i.e., this system will +act as an +.Tn ARP +server, +responding to requests for +.Ar hostname +even though the host address is not its own. +If the word +.Cm proxy +is also given, the published entry will be a +.Dq proxy only +entry. +.It Fl v +Display verbose information when adding or deleting +.Tn ARP +entries. +.El +.Sh SEE ALSO +.Xr inet 3 , +.Xr arp 4 , +.Xr ifconfig 8 +.Sh HISTORY +The +.Nm +command appeared in +.Bx 4.3 . diff --git a/usr.sbin/arp/arp.c b/usr.sbin/arp/arp.c new file mode 100644 index 000000000..898fa4f6a --- /dev/null +++ b/usr.sbin/arp/arp.c @@ -0,0 +1,747 @@ +/* $NetBSD: arp.c,v 1.53 2015/07/31 04:02:40 ozaki-r Exp $ */ + +/* + * Copyright (c) 1984, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Sun Microsystems, Inc. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 +#ifndef lint +__COPYRIGHT("@(#) Copyright (c) 1984, 1993\ + The Regents of the University of California. All rights reserved."); +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)arp.c 8.3 (Berkeley) 4/28/95"; +#else +__RCSID("$NetBSD: arp.c,v 1.53 2015/07/31 04:02:40 ozaki-r Exp $"); +#endif +#endif /* not lint */ + +/* + * arp - display, set, and delete arp table entries + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "prog_ops.h" + +static int is_llinfo(const struct sockaddr_dl *, int); +static int delete(const char *, const char *); +static void dump(uint32_t); +static void delete_all(void); +static void sdl_print(const struct sockaddr_dl *); +static int getifname(u_int16_t, char *, size_t); +static int atosdl(const char *s, struct sockaddr_dl *sdl); +static int file(const char *); +static void get(const char *); +static int getinetaddr(const char *, struct in_addr *); +static int getsocket(void); +static struct rt_msghdr * + rtmsg(const int, const int, const struct sockaddr_inarp *, + const struct sockaddr_dl *); +static int set(int, char **); +static void usage(void) __dead; + +static int aflag, nflag, vflag; +static struct sockaddr_in so_mask = { + .sin_len = 8, + .sin_addr = { + .s_addr = 0xffffffff + } +}; +static struct sockaddr_inarp blank_sin = { + .sin_len = sizeof(blank_sin), + .sin_family = AF_INET +}; +static struct sockaddr_dl blank_sdl = { + .sdl_len = sizeof(blank_sdl), + .sdl_family = AF_LINK +}; + +static int expire_time, flags, export_only, doing_proxy, found_entry; + +int +main(int argc, char **argv) +{ + int ch; + int op = 0; + + setprogname(argv[0]); + + while ((ch = getopt(argc, argv, "andsfv")) != -1) + switch((char)ch) { + case 'a': + aflag = 1; + break; + case 'd': + case 's': + case 'f': + if (op) + usage(); + op = ch; + break; + case 'n': + nflag = 1; + break; + case 'v': + vflag = 1; + break; + default: + usage(); + } + argc -= optind; + argv += optind; + + if (!op && aflag) + op = 'a'; + + if (prog_init && prog_init() == -1) + err(1, "init failed"); + + switch((char)op) { + case 'a': + dump(0); + break; + case 'd': + if (aflag && argc == 0) + delete_all(); + else { + if (aflag || argc < 1 || argc > 2) + usage(); + (void)delete(argv[0], argv[1]); + } + break; + case 's': + if (argc < 2 || argc > 7) + usage(); + return (set(argc, argv) ? 1 : 0); + case 'f': + if (argc != 1) + usage(); + return (file(argv[0])); + default: + if (argc != 1) + usage(); + get(argv[0]); + break; + } + return (0); +} + +/* + * Process a file to set standard arp entries + */ +static int +file(const char *name) +{ + char *line, *argv[5]; + int i, retval; + FILE *fp; + + if (!strcmp(name, "-")) { + fp = stdin; + } else { + fp = fopen(name, "r"); + if (fp == NULL) { + err(1, "Cannot open %s", name); + } + } + retval = 0; + for (; (line = fparseln(fp, NULL, NULL, NULL, 0)) != NULL; free(line)) { + char **ap, *inputstring; + + inputstring = line; + for (ap = argv; ap < &argv[sizeof(argv) / sizeof(argv[0])] && + (*ap = stresep(&inputstring, " \t", '\\')) != NULL;) { + if (**ap != '\0') + ap++; + } + i = ap - argv; + if (i < 2) { + warnx("bad line: %s", line); + retval = 1; + continue; + } + if (set(i, argv)) + retval = 1; + } + if (fp != stdin) + (void)fclose(fp); + return retval; +} + +static int +getsocket(void) +{ + int s; + s = prog_socket(PF_ROUTE, SOCK_RAW, 0); + if (s < 0) + err(1, "socket"); + return s; +} + +static int +getlink(const char *name, struct sockaddr_dl *sdl) +{ + struct ifaddrs *ifap, *ifa; + + if (getifaddrs(&ifap) != 0) { + warn("getifaddrs"); + return 0; + } + + for (ifa = ifap; ifa; ifa = ifa->ifa_next) { + if (ifa->ifa_addr->sa_family != AF_LINK) + continue; + if (strcmp(ifa->ifa_name, name) != 0) + continue; + memcpy(sdl, ifa->ifa_addr, sizeof(*sdl)); + freeifaddrs(ifap); + return 1; + } + freeifaddrs(ifap); + return 0; +} + +/* + * Set an individual arp entry + */ +static int +set(int argc, char **argv) +{ + struct sockaddr_inarp *sina; + struct sockaddr_dl *sdl; + struct rt_msghdr *rtm; + char *host = argv[0], *eaddr; + struct sockaddr_inarp sin_m = blank_sin; /* struct copy */ + struct sockaddr_dl sdl_m = blank_sdl; /* struct copy */ + int s; + + eaddr = argv[1]; + + s = getsocket(); + argc -= 2; + argv += 2; + + if (getinetaddr(host, &sin_m.sin_addr) == -1) + return (1); + if (atosdl(eaddr, &sdl_m)) + warnx("invalid link-level address '%s'", eaddr); + doing_proxy = flags = export_only = expire_time = 0; + for (; argc-- > 0; argv++) { + if (strncmp(argv[0], "temp", 4) == 0) { + struct timeval timev; + (void)gettimeofday(&timev, 0); + expire_time = timev.tv_sec + 20 * 60; + } + else if (strncmp(argv[0], "pub", 3) == 0) { + flags |= RTF_ANNOUNCE; + doing_proxy = SIN_PROXY; + if (argc && strncmp(argv[1], "pro", 3) == 0) { + export_only = 1; + argc--; argv++; + } + } else if (strncmp(argv[0], "trail", 5) == 0) { + warnx("%s: Sending trailers is no longer supported", + host); + } else if (strcmp(argv[0], "ifscope") == 0) { + if (argc == 0) { + warnx("missing interface for ifscope"); + continue; + } + argc--; + argv++; + if (!getlink(argv[0], &sdl_m)) + warnx("cannot get link address for %s", argv[0]); + } + + } + if (memcmp(&sdl_m, &blank_sdl, sizeof(blank_sdl))) + goto out; +tryagain: + rtm = rtmsg(s, RTM_GET, &sin_m, &sdl_m); + if (rtm == NULL) { + warn("%s", host); + return (1); + } + sina = (struct sockaddr_inarp *)(void *)(rtm + 1); + sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(sina->sin_len) + + (char *)(void *)sina); + if (sina->sin_addr.s_addr == sin_m.sin_addr.s_addr) { + if (is_llinfo(sdl, rtm->rtm_flags)) + goto overwrite; + if (doing_proxy == 0) { + warnx("set: can only proxy for %s", host); + return (1); + } + if (sin_m.sin_other & SIN_PROXY) { + warnx("set: proxy entry exists for non 802 device"); + return (1); + } + sin_m.sin_other = SIN_PROXY; + export_only = 1; + goto tryagain; + } +overwrite: + if (sdl->sdl_family != AF_LINK) { + warnx("cannot intuit interface index and type for %s", + host); + return (1); + } + sdl_m.sdl_type = sdl->sdl_type; + sdl_m.sdl_index = sdl->sdl_index; +out: + sin_m.sin_other = 0; + if (doing_proxy && export_only) + sin_m.sin_other = SIN_PROXY; + rtm = rtmsg(s, RTM_ADD, &sin_m, &sdl_m); + if (vflag) + (void)printf("%s (%s) added\n", host, eaddr); + return (rtm == NULL) ? 1 : 0; +} + +/* + * Display an individual arp entry + */ +static void +get(const char *host) +{ + struct sockaddr_inarp sin = blank_sin; /* struct copy */ + + if (getinetaddr(host, &sin.sin_addr) == -1) + exit(1); + dump(sin.sin_addr.s_addr); + if (found_entry == 0) + errx(1, "%s (%s) -- no entry", host, inet_ntoa(sin.sin_addr)); +} + + +static int +is_llinfo(const struct sockaddr_dl *sdl, int rtflags) +{ + if (sdl->sdl_family != AF_LINK || + (rtflags & (RTF_LLINFO|RTF_GATEWAY)) != RTF_LLINFO) + return 0; + + switch (sdl->sdl_type) { + case IFT_ETHER: + case IFT_FDDI: + case IFT_ISO88023: + case IFT_ISO88024: + case IFT_ISO88025: + case IFT_ARCNET: + return 1; + default: + return 0; + } +} + +/* + * Delete an arp entry + */ +int +delete(const char *host, const char *info) +{ + struct sockaddr_inarp *sina; + struct sockaddr_dl *sdl; + struct rt_msghdr *rtm; + struct sockaddr_inarp sin_m = blank_sin; /* struct copy */ + struct sockaddr_dl sdl_m = blank_sdl; /* struct copy */ + int s; + + s = getsocket(); + if (info && strncmp(info, "pro", 3) == 0) + sin_m.sin_other = SIN_PROXY; + if (getinetaddr(host, &sin_m.sin_addr) == -1) + return (1); +tryagain: + rtm = rtmsg(s, RTM_GET, &sin_m, &sdl_m); + if (rtm == NULL) { + warn("%s", host); + return (1); + } + sina = (struct sockaddr_inarp *)(void *)(rtm + 1); + sdl = (struct sockaddr_dl *)(void *)(RT_ROUNDUP(sina->sin_len) + + (char *)(void *)sina); + if (sina->sin_addr.s_addr == sin_m.sin_addr.s_addr && + is_llinfo(sdl, rtm->rtm_flags)) + goto delete; + if (sin_m.sin_other & SIN_PROXY) { + warnx("delete: can't locate %s", host); + return (1); + } else { + sin_m.sin_other = SIN_PROXY; + goto tryagain; + } +delete: + if (sdl->sdl_family != AF_LINK) { + (void)warnx("cannot locate %s", host); + return (1); + } + rtm = rtmsg(s, RTM_DELETE, &sin_m, sdl); + if (rtm == NULL) + return (1); + if (vflag) + (void)printf("%s (%s) deleted\n", host, + inet_ntoa(sin_m.sin_addr)); + return (0); +} + +/* + * Dump the entire arp table + */ +void +dump(uint32_t addr) +{ + int mib[6]; + size_t needed; + char ifname[IFNAMSIZ]; + char *lim, *buf, *next; + const char *host; + struct rt_msghdr *rtm; + struct sockaddr_inarp *sina; + struct sockaddr_dl *sdl; + struct hostent *hp; + + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET; + mib[4] = NET_RT_FLAGS; + mib[5] = RTF_LLINFO; + if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) + err(1, "route-sysctl-estimate"); + if (needed == 0) + return; + if ((buf = malloc(needed)) == NULL) + err(1, "malloc"); + if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) + err(1, "actual retrieval of routing table"); + lim = buf + needed; + for (next = buf; next < lim; next += rtm->rtm_msglen) { + rtm = (struct rt_msghdr *)(void *)next; + sina = (struct sockaddr_inarp *)(void *)(rtm + 1); + sdl = (struct sockaddr_dl *)(void *) + (RT_ROUNDUP(sina->sin_len) + (char *)(void *)sina); + if (addr) { + if (addr != sina->sin_addr.s_addr) + continue; + found_entry = 1; + } + if (nflag == 0) + hp = gethostbyaddr((const char *)(void *) + &(sina->sin_addr), + sizeof sina->sin_addr, AF_INET); + else + hp = NULL; + + host = hp ? hp->h_name : "?"; + + (void)printf("%s (%s) at ", host, inet_ntoa(sina->sin_addr)); + if (sdl->sdl_alen) + sdl_print(sdl); + else + (void)printf("(incomplete)"); + + if (sdl->sdl_index) { + if (getifname(sdl->sdl_index, ifname, sizeof(ifname)) == 0) + (void)printf(" on %s", ifname); + } + + if (rtm->rtm_rmx.rmx_expire == 0) + (void)printf(" permanent"); + if (sina->sin_other & SIN_PROXY) + (void)printf(" published (proxy only)"); + if (rtm->rtm_addrs & RTA_NETMASK) { + sina = (struct sockaddr_inarp *)(void *) + (RT_ROUNDUP(sdl->sdl_len) + (char *)(void *)sdl); + if (sina->sin_addr.s_addr == 0xffffffff) + (void)printf(" published"); + if (sina->sin_len != 8) + (void)printf("(weird)"); + } + (void)printf("\n"); + } + free(buf); +} + +/* + * Delete the entire arp table + */ +void +delete_all(void) +{ + int mib[6]; + size_t needed; + char addr[sizeof("000.000.000.000\0")]; + char *lim, *buf, *next; + struct rt_msghdr *rtm; + struct sockaddr_inarp *sina; + + mib[0] = CTL_NET; + mib[1] = PF_ROUTE; + mib[2] = 0; + mib[3] = AF_INET; + mib[4] = NET_RT_FLAGS; + mib[5] = RTF_LLINFO; + if (prog_sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) + err(1, "route-sysctl-estimate"); + if (needed == 0) + return; + if ((buf = malloc(needed)) == NULL) + err(1, "malloc"); + if (prog_sysctl(mib, 6, buf, &needed, NULL, 0) < 0) + err(1, "actual retrieval of routing table"); + lim = buf + needed; + for (next = buf; next < lim; next += rtm->rtm_msglen) { + rtm = (struct rt_msghdr *)(void *)next; + sina = (struct sockaddr_inarp *)(void *)(rtm + 1); + (void)snprintf(addr, sizeof(addr), "%s", + inet_ntoa(sina->sin_addr)); + (void)delete(addr, NULL); + } + free(buf); +} + +void +sdl_print(const struct sockaddr_dl *sdl) +{ + char hbuf[NI_MAXHOST]; + + if (getnameinfo((const struct sockaddr *)(const void *)sdl, + (socklen_t)sdl->sdl_len, + hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) + (void)printf(""); + else + (void)printf("%s", hbuf); +} + +static int +atosdl(const char *ss, struct sockaddr_dl *sdl) +{ + int i; + unsigned long b; + char *endp; + char *p; + char *t, *r; + + p = LLADDR(sdl); + endp = ((char *)(void *)sdl) + sdl->sdl_len; + i = 0; + + b = strtoul(ss, &t, 16); + if (b > 255 || t == ss) + return 1; + + *p++ = (char)b; + ++i; + while ((p < endp) && (*t++ == ':')) { + b = strtoul(t, &r, 16); + if (b > 255 || r == t) + break; + *p++ = (char)b; + ++i; + t = r; + } + sdl->sdl_alen = i; + + return 0; +} + +static void +usage(void) +{ + const char *progname; + + progname = getprogname(); + (void)fprintf(stderr, "Usage: %s [-n] hostname\n", progname); + (void)fprintf(stderr, " %s [-nv] -a\n", progname); + (void)fprintf(stderr, " %s [-v] -d [-a|hostname [pub [proxy]]]\n", + progname); + (void)fprintf(stderr, " %s -s hostname ether_addr [temp] [pub [proxy]]\n", + progname); + (void)fprintf(stderr, " %s -f filename\n", progname); + exit(1); +} + +static struct rt_msghdr * +rtmsg(const int s, const int cmd, const struct sockaddr_inarp *sin, + const struct sockaddr_dl *sdl) +{ + static int seq; + struct rt_msghdr *rtm; + char *cp; + int l; + static struct { + struct rt_msghdr m_rtm; + char m_space[512]; + } m_rtmsg; + pid_t pid; + + rtm = &m_rtmsg.m_rtm; + cp = m_rtmsg.m_space; + errno = 0; + + if (cmd == RTM_DELETE) + goto doit; + (void)memset(&m_rtmsg, 0, sizeof(m_rtmsg)); + rtm->rtm_flags = flags; + rtm->rtm_version = RTM_VERSION; + + switch (cmd) { + default: + errx(1, "internal wrong cmd"); + /*NOTREACHED*/ + case RTM_ADD: + rtm->rtm_addrs |= RTA_GATEWAY; + rtm->rtm_rmx.rmx_expire = expire_time; + rtm->rtm_inits = RTV_EXPIRE; + rtm->rtm_flags |= (RTF_HOST | RTF_STATIC); + if (doing_proxy) { + if (!export_only) { + rtm->rtm_addrs |= RTA_NETMASK; + rtm->rtm_flags &= ~RTF_HOST; + } + } + /* FALLTHROUGH */ + case RTM_GET: + rtm->rtm_addrs |= RTA_DST; + } + +#define NEXTADDR(w, s) \ + if (rtm->rtm_addrs & (w)) { \ + (void)memcpy(cp, &s, \ + (size_t)((const struct sockaddr *)&s)->sa_len); \ + RT_ADVANCE(cp, ((const struct sockaddr *)&s)); \ + } + + NEXTADDR(RTA_DST, *sin); + NEXTADDR(RTA_GATEWAY, *sdl); + NEXTADDR(RTA_NETMASK, so_mask); + + rtm->rtm_msglen = cp - (char *)(void *)&m_rtmsg; +doit: + l = rtm->rtm_msglen; + rtm->rtm_seq = ++seq; + rtm->rtm_type = cmd; +#ifdef __minix + /* + * Borrow from the future by setting the "this is a link-local request" + * flag on all routing socket requests. IMPORTANT: this change may be + * dropped with the resync to NetBSD 8 as it will do the same thing, + * although slightly differently (and hence may not create a conflict). + */ + rtm->rtm_flags |= RTF_LLDATA; +#endif /* __minix */ + if (prog_write(s, &m_rtmsg, (size_t)l) < 0) { + if (errno != ESRCH || cmd != RTM_DELETE) { + warn("writing to routing socket"); + return NULL; + } + } + + pid = prog_getpid(); + do { + l = prog_read(s, &m_rtmsg, sizeof(m_rtmsg)); + } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); + if (l < 0) + warn("read from routing socket"); + return rtm; +} + +static int +getinetaddr(const char *host, struct in_addr *inap) +{ + struct hostent *hp; + + if (inet_aton(host, inap) == 1) + return (0); + if ((hp = gethostbyname(host)) == NULL) { + warnx("%s: %s", host, hstrerror(h_errno)); + return (-1); + } + (void)memcpy(inap, hp->h_addr, sizeof(*inap)); + return (0); +} + +static int +getifname(u_int16_t ifindex, char *ifname, size_t l) +{ + int i; + struct ifaddrs *addr; + const struct sockaddr_dl *sdl = NULL; + static struct ifaddrs* ifaddrs = NULL; + + if (ifaddrs == NULL) { + i = getifaddrs(&ifaddrs); + if (i != 0) + err(1, "getifaddrs"); + } + + for (addr = ifaddrs; addr; addr = addr->ifa_next) { + if (addr->ifa_addr == NULL || + addr->ifa_addr->sa_family != AF_LINK) + continue; + + sdl = (const struct sockaddr_dl *)(void *)addr->ifa_addr; + if (sdl && sdl->sdl_index == ifindex) { + (void) strlcpy(ifname, addr->ifa_name, l); + return 0; + } + } + + return -1; +} diff --git a/usr.sbin/arp/arp_hostops.c b/usr.sbin/arp/arp_hostops.c new file mode 100644 index 000000000..ad7f34061 --- /dev/null +++ b/usr.sbin/arp/arp_hostops.c @@ -0,0 +1,52 @@ +/* $NetBSD: arp_hostops.c,v 1.1 2015/07/29 06:07:35 ozaki-r Exp $ */ + +/* + * Copyright (c) 2015 The NetBSD Foundation, Inc. + * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 +#ifndef lint +__RCSID("$NetBSD: arp_hostops.c,v 1.1 2015/07/29 06:07:35 ozaki-r Exp $"); +#endif /* !lint */ + +#include +#include +#include + +#include +#include + +#include "prog_ops.h" + +const struct prog_ops prog_ops = { + .op_socket = socket, + .op_open = open, + .op_getpid = getpid, + + .op_read = read, + .op_write = write, + + .op_sysctl = sysctl, +}; diff --git a/usr.sbin/arp/arp_rumpops.c b/usr.sbin/arp/arp_rumpops.c new file mode 100644 index 000000000..2c18094e7 --- /dev/null +++ b/usr.sbin/arp/arp_rumpops.c @@ -0,0 +1,56 @@ +/* $NetBSD: arp_rumpops.c,v 1.1 2015/07/29 06:07:35 ozaki-r Exp $ */ + +/* + * Copyright (c) 2015 The NetBSD Foundation, Inc. + * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 +#ifndef lint +__RCSID("$NetBSD: arp_rumpops.c,v 1.1 2015/07/29 06:07:35 ozaki-r Exp $"); +#endif /* !lint */ + +#include +#include + +#include + +#include +#include +#include + +#include "prog_ops.h" + +const struct prog_ops prog_ops = { + .op_init = rumpclient_init, + + .op_socket = rump_sys_socket, + .op_open = rump_sys_open, + .op_getpid = rump_sys_getpid, + + .op_read = rump_sys_read, + .op_write = rump_sys_write, + + .op_sysctl = rump_sys___sysctl, +}; diff --git a/usr.sbin/arp/prog_ops.h b/usr.sbin/arp/prog_ops.h new file mode 100644 index 000000000..8c26ab152 --- /dev/null +++ b/usr.sbin/arp/prog_ops.h @@ -0,0 +1,68 @@ +/* $NetBSD: prog_ops.h,v 1.1 2015/07/29 06:07:35 ozaki-r Exp $ */ + +/* + * Copyright (c) 2015 The NetBSD Foundation, Inc. + * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _PROG_OPS_H_ +#define _PROG_OPS_H_ + +#include + +#ifndef CRUNCHOPS +/* XXX: Keep same order with netstat! */ +struct prog_ops { + int (*op_init)(void); + + int (*op_sysctl)(const int *, u_int, void *, size_t *, + const void *, size_t); + + int (*op_socket)(int, int, int); + int (*op_open)(const char *, int, ...); + pid_t (*op_getpid)(void); + + ssize_t (*op_read)(int, void *, size_t); + ssize_t (*op_write)(int, const void *, size_t); +}; +extern const struct prog_ops prog_ops; + +#define prog_init prog_ops.op_init +#define prog_socket prog_ops.op_socket +#define prog_open prog_ops.op_open +#define prog_getpid prog_ops.op_getpid +#define prog_read prog_ops.op_read +#define prog_write prog_ops.op_write +#define prog_sysctl prog_ops.op_sysctl +#else +#define prog_init ((int (*)(void))NULL) +#define prog_socket socket +#define prog_open open +#define prog_getpid getpid +#define prog_read read +#define prog_write write +#define prog_sysctl sysctl +#endif + +#endif /* _PROG_OPS_H_ */