diff options
| -rw-r--r-- | usr.sbin/rarpd/Makefile | 4 | ||||
| -rw-r--r-- | usr.sbin/rarpd/arptab.c | 219 | ||||
| -rw-r--r-- | usr.sbin/rarpd/ether_addr.c | 24 | ||||
| -rw-r--r-- | usr.sbin/rarpd/rarpd.c | 13 |
4 files changed, 252 insertions, 8 deletions
diff --git a/usr.sbin/rarpd/Makefile b/usr.sbin/rarpd/Makefile index 9415fc9..c108d62 100644 --- a/usr.sbin/rarpd/Makefile +++ b/usr.sbin/rarpd/Makefile @@ -1,9 +1,9 @@ # from: @(#)Makefile 5.8 (Berkeley) 7/28/90 -# $Id: Makefile,v 1.1 1994/08/08 01:03:57 wollman Exp $ +# $Id: Makefile,v 1.1.1.1 1995/03/02 06:41:39 wpaul Exp $ PROG= rarpd MAN8= rarpd.8 -SRCS= rarpd.c ether_addr.c +SRCS= rarpd.c arptab.c ether_addr.c CFLAGS+= -DTFTP_DIR=\"/tftpboot\" .include <bsd.prog.mk> diff --git a/usr.sbin/rarpd/arptab.c b/usr.sbin/rarpd/arptab.c new file mode 100644 index 0000000..f1f5cfc --- /dev/null +++ b/usr.sbin/rarpd/arptab.c @@ -0,0 +1,219 @@ +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#ifndef lint +static char copyright[] = +"@(#) Copyright (c) 1984, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)arp.c 8.2 (Berkeley) 1/2/94"; +#endif /* not lint */ + +/* + * set arp table entries + */ + + +#include <sys/param.h> +#include <sys/file.h> +#include <sys/socket.h> +#include <sys/sysctl.h> + +#include <net/if.h> +#include <net/if_dl.h> +#include <net/if_types.h> +#include <net/route.h> + +#include <netinet/in.h> +#include <netinet/if_ether.h> + +#include <arpa/inet.h> + +#include <netdb.h> +#include <errno.h> +#include <nlist.h> +#include <stdio.h> +#include <paths.h> +#include <syslog.h> + +extern int errno; +static int pid; +static int s = -1; + +getsocket() { + if (s < 0) { + s = socket(PF_ROUTE, SOCK_RAW, 0); + if (s < 0) { + perror("arp: socket"); + exit(1); + } + } +} + +struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}}; +struct sockaddr_inarp blank_sin = {sizeof(blank_sin), AF_INET }, sin_m; +struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m; +int expire_time, flags, export_only, doing_proxy; +struct { + struct rt_msghdr m_rtm; + char m_space[512]; +} m_rtmsg; + +/* + * Set an individual arp entry + */ +arptab_set(eaddr, host) + u_char *eaddr; + u_long host; +{ + register struct sockaddr_inarp *sin = &sin_m; + register struct sockaddr_dl *sdl; + register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm); + struct timeval time; + + getsocket(); + pid = getpid(); + sdl_m = blank_sdl; + sin_m = blank_sin; + sin->sin_addr.s_addr = host; + bcopy((char *)eaddr, (u_char *)LLADDR(&sdl_m), 6); + sdl_m.sdl_alen = 6; + doing_proxy = flags = export_only = expire_time = 0; + gettimeofday(&time, 0); + expire_time = time.tv_sec + 20 * 60; + +tryagain: + if (rtmsg(RTM_GET) < 0) { + syslog(LOG_ERR,"%s: %m", inet_ntoa(sin->sin_addr)); + return (1); + } + sin = (struct sockaddr_inarp *)(rtm + 1); + sdl = (struct sockaddr_dl *)(sin->sin_len + (char *)sin); + if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) { + if (sdl->sdl_family == AF_LINK && + (rtm->rtm_flags & RTF_LLINFO) && + !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) { + case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023: + case IFT_ISO88024: case IFT_ISO88025: + goto overwrite; + } + if (doing_proxy == 0) { + syslog(LOG_ERR, "arptab_set: can only proxy for %s\n", inet_ntoa(sin->sin_addr)); + return (1); + } + if (sin_m.sin_other & SIN_PROXY) { + syslog(LOG_ERR,"arptab_set: proxy entry exists for non 802 device\n"); + return(1); + } + sin_m.sin_other = SIN_PROXY; + export_only = 1; + goto tryagain; + } +overwrite: + if (sdl->sdl_family != AF_LINK) { + syslog(LOG_ERR,"arptab_set: cannot intuit interface index and type for %s\n", inet_ntoa(sin->sin_addr)); + return (1); + } + sdl_m.sdl_type = sdl->sdl_type; + sdl_m.sdl_index = sdl->sdl_index; + return (rtmsg(RTM_ADD)); +} + +rtmsg(cmd) +{ + static int seq; + int rlen; + register struct rt_msghdr *rtm = &m_rtmsg.m_rtm; + register char *cp = m_rtmsg.m_space; + register int l; + + errno = 0; + if (cmd == RTM_DELETE) + goto doit; + bzero((char *)&m_rtmsg, sizeof(m_rtmsg)); + rtm->rtm_flags = flags; + rtm->rtm_version = RTM_VERSION; + + switch (cmd) { + default: + syslog(LOG_ERR, "arptap_set: internal wrong cmd\n"); + exit(1); + 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); + sin_m.sin_other = 0; + if (doing_proxy) { + if (export_only) + sin_m.sin_other = SIN_PROXY; + else { + 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)) { \ + bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);} + + NEXTADDR(RTA_DST, sin_m); + NEXTADDR(RTA_GATEWAY, sdl_m); + NEXTADDR(RTA_NETMASK, so_mask); + + rtm->rtm_msglen = cp - (char *)&m_rtmsg; +doit: + l = rtm->rtm_msglen; + rtm->rtm_seq = ++seq; + rtm->rtm_type = cmd; + if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) { + if (errno != ESRCH && errno != EEXIST) { + syslog(LOG_ERR, "writing to routing socket: %m"); + return (-1); + } + } + do { + l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg)); + } while (l > 0 && (rtm->rtm_seq != seq || rtm->rtm_pid != pid)); + if (l < 0) + syslog(LOG_ERR, "arptab_set: read from routing socket: %m"); + return (0); +} diff --git a/usr.sbin/rarpd/ether_addr.c b/usr.sbin/rarpd/ether_addr.c index 197c157..a2a38b6 100644 --- a/usr.sbin/rarpd/ether_addr.c +++ b/usr.sbin/rarpd/ether_addr.c @@ -10,7 +10,7 @@ * * Have a party. * - * $Id$ + * $Id: ether_addr.c,v 1.1.1.1 1995/03/02 06:41:40 wpaul Exp $ */ @@ -106,3 +106,25 @@ nomatch: return (-1); } + +int ether_print(cp) + u_char *cp; +{ + printf("%x:%x:%x:%x:%x:%x", cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]); +} + +int ether_aton(a, n) + char *a; + u_char *n; +{ + int i, o[6]; + + i = sscanf(a, "%x:%x:%x:%x:%x:%x", &o[0], &o[1], &o[2], + &o[3], &o[4], &o[5]); + if (i != 6) { + return (i); + } + for (i=0; i<6; i++) + n[i] = o[i]; + return (0); +} diff --git a/usr.sbin/rarpd/rarpd.c b/usr.sbin/rarpd/rarpd.c index aa18dd8..0be3e6c 100644 --- a/usr.sbin/rarpd/rarpd.c +++ b/usr.sbin/rarpd/rarpd.c @@ -26,7 +26,7 @@ char copyright[] = #ifndef lint static char rcsid[] = - "@(#) $Header: rarpd.c,v 1.6 91/01/09 14:47:00 mccanne Exp $ (LBL)"; + "@(#) $Header: /a/ncvs/src/usr.sbin/rarpd/rarpd.c,v 1.1.1.1 1995/03/02 06:41:39 wpaul Exp $ (LBL)"; #endif @@ -635,7 +635,7 @@ update_arptab(ep, ipaddr) u_char *ep; u_long ipaddr; { -#ifdef SIOCSARP_IS_DEPRECATED_IN_4_4BSD +#ifdef SIOCSARP int s; struct arpreq request; struct sockaddr_in *sin; @@ -651,18 +651,21 @@ update_arptab(ep, ipaddr) if (ioctl(s, SIOCSARP, (caddr_t)&request) < 0) syslog(LOG_ERR, "SIOCSARP: %m"); (void)close(s); +#else + if (arptab_set(ep, ipaddr) > 0) + syslog(LOG_ERR, "couldn't update arp table"); #endif } /* * Build a reverse ARP packet and sent it out on the interface. - * 'ep' points to a valid REVARP_REQUEST. The REVARP_REPLY is built + * 'ep' points to a valid ARPOP_REVREQUEST. The ARPOP_REVREPLY is built * on top of the request, then written to the network. * * RFC 903 defines the ether_arp fields as follows. The following comments * are taken (more or less) straight from this document. * - * REVARP_REQUEST + * ARPOP_REVREQUEST * * arp_sha is the hardware address of the sender of the packet. * arp_spa is undefined. @@ -672,7 +675,7 @@ update_arptab(ep, ipaddr) * address of the sender. * arp_tpa is undefined. * - * REVARP_REPLY + * ARPOP_REVREPLY * * arp_sha is the hardware address of the responder (the sender of the * reply packet). |
