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/* $MidnightBSD$ */ |
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/* |
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* hwaddr.c - routines that deal with hardware addresses. |
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* (i.e. Ethernet) |
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* |
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* $FreeBSD: stable/10/libexec/bootpd/hwaddr.c 105041 2002-10-13 11:27:36Z kris $ |
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*/ |
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|
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <sys/socket.h> |
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#include <sys/ioctl.h> |
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|
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#if defined(SUNOS) || defined(SVR4) |
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#include <sys/sockio.h> |
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#endif |
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#ifdef SVR4 |
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#include <sys/stream.h> |
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#include <stropts.h> |
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#include <fcntl.h> |
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#endif |
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|
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#ifdef _AIX32 |
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#include <sys/time.h> /* for struct timeval in net/if.h */ |
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#include <net/if.h> /* for struct ifnet in net/if_arp.h */ |
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#endif |
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|
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#include <net/if_arp.h> |
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#include <netinet/in.h> |
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|
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#ifdef WIN_TCP |
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#include <netinet/if_ether.h> |
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#include <sys/dlpi.h> |
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#endif |
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|
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#include <stdio.h> |
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#ifndef NO_UNISTD |
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#include <unistd.h> |
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#endif |
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#include <syslog.h> |
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|
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#ifndef USE_BFUNCS |
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/* Yes, memcpy is OK here (no overlapped copies). */ |
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#include <memory.h> |
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#define bcopy(a,b,c) memcpy(b,a,c) |
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#define bzero(p,l) memset(p,0,l) |
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#define bcmp(a,b,c) memcmp(a,b,c) |
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#endif |
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|
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#ifndef ATF_INUSE /* Not defined on some systems (i.e. Linux) */ |
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#define ATF_INUSE 0 |
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#endif |
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|
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/* For BSD 4.4, set arp entry by writing to routing socket */ |
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#if defined(BSD) |
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#if BSD >= 199306 |
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extern int bsd_arp_set(struct in_addr *, char *, int); |
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#endif |
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#endif |
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|
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#include "bptypes.h" |
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#include "hwaddr.h" |
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#include "report.h" |
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|
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extern int debug; |
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|
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/* |
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* Hardware address lengths (in bytes) and network name based on hardware |
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* type code. List in order specified by Assigned Numbers RFC; Array index |
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* is hardware type code. Entries marked as zero are unknown to the author |
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* at this time. . . . |
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*/ |
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|
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struct hwinfo hwinfolist[] = |
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{ |
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{0, "Reserved"}, /* Type 0: Reserved (don't use this) */ |
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{6, "Ethernet"}, /* Type 1: 10Mb Ethernet (48 bits) */ |
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{1, "3Mb Ethernet"}, /* Type 2: 3Mb Ethernet (8 bits) */ |
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{0, "AX.25"}, /* Type 3: Amateur Radio AX.25 */ |
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{1, "ProNET"}, /* Type 4: Proteon ProNET Token Ring */ |
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{0, "Chaos"}, /* Type 5: Chaos */ |
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{6, "IEEE 802"}, /* Type 6: IEEE 802 Networks */ |
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{0, "ARCNET"} /* Type 7: ARCNET */ |
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}; |
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int hwinfocnt = sizeof(hwinfolist) / sizeof(hwinfolist[0]); |
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|
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|
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/* |
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* Setup the arp cache so that IP address 'ia' will be temporarily |
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* bound to hardware address 'ha' of length 'len'. |
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*/ |
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void |
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setarp(s, ia, hafamily, haddr, halen) |
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int s; /* socket fd */ |
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struct in_addr *ia; /* protocol address */ |
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int hafamily; /* HW address family */ |
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u_char *haddr; /* HW address data */ |
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int halen; |
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{ |
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#ifdef SIOCSARP |
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#ifdef WIN_TCP |
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/* This is an SVR4 with different networking code from |
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* Wollongong WIN-TCP. Not quite like the Lachman code. |
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* Code from: drew@drewsun.FEITH.COM (Andrew B. Sudell) |
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*/ |
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#undef SIOCSARP |
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#define SIOCSARP ARP_ADD |
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struct arptab arpreq; /* Arp table entry */ |
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|
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bzero((caddr_t) &arpreq, sizeof(arpreq)); |
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arpreq.at_flags = ATF_COM; |
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|
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/* Set up IP address */ |
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arpreq.at_in = ia->s_addr; |
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|
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/* Set up Hardware Address */ |
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bcopy(haddr, arpreq.at_enaddr, halen); |
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|
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/* Set the Date Link type. */ |
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/* XXX - Translate (hafamily) to dltype somehow? */ |
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arpreq.at_dltype = DL_ETHER; |
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|
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#else /* WIN_TCP */ |
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/* Good old Berkeley way. */ |
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struct arpreq arpreq; /* Arp request ioctl block */ |
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struct sockaddr_in *si; |
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char *p; |
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|
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bzero((caddr_t) &arpreq, sizeof(arpreq)); |
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arpreq.arp_flags = ATF_INUSE | ATF_COM; |
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|
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/* Set up the protocol address. */ |
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arpreq.arp_pa.sa_family = AF_INET; |
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si = (struct sockaddr_in *) &arpreq.arp_pa; |
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si->sin_addr = *ia; |
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|
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/* Set up the hardware address. */ |
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#ifdef __linux__ /* XXX - Do others need this? -gwr */ |
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/* |
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* Linux requires the sa_family field set. |
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* longyear@netcom.com (Al Longyear) |
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*/ |
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arpreq.arp_ha.sa_family = hafamily; |
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#endif /* linux */ |
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|
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/* This variable is just to help catch type mismatches. */ |
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p = arpreq.arp_ha.sa_data; |
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bcopy(haddr, p, halen); |
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#endif /* WIN_TCP */ |
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|
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#ifdef SVR4 |
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/* |
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* And now the stuff for System V Rel 4.x which does not |
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* appear to allow SIOCxxx ioctls on a socket descriptor. |
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* Thanks to several people: (all sent the same fix) |
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* Barney Wolff <barney@databus.com>, |
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* bear@upsys.se (Bj|rn Sj|holm), |
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* Michael Kuschke <Michael.Kuschke@Materna.DE>, |
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*/ |
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{ |
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int fd; |
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struct strioctl iocb; |
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|
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if ((fd=open("/dev/arp", O_RDWR)) < 0) { |
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report(LOG_ERR, "open /dev/arp: %s\n", get_errmsg()); |
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} |
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iocb.ic_cmd = SIOCSARP; |
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iocb.ic_timout = 0; |
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iocb.ic_dp = (char *)&arpreq; |
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iocb.ic_len = sizeof(arpreq); |
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if (ioctl(fd, I_STR, (caddr_t)&iocb) < 0) { |
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report(LOG_ERR, "ioctl I_STR: %s\n", get_errmsg()); |
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} |
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close (fd); |
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} |
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#else /* SVR4 */ |
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/* |
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* On SunOS, the ioctl sometimes returns ENXIO, and it |
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* appears to happen when the ARP cache entry you tried |
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* to add is already in the cache. (Sigh...) |
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* XXX - Should this error simply be ignored? -gwr |
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*/ |
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if (ioctl(s, SIOCSARP, (caddr_t) &arpreq) < 0) { |
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report(LOG_ERR, "ioctl SIOCSARP: %s", get_errmsg()); |
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} |
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#endif /* SVR4 */ |
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#else /* SIOCSARP */ |
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#if defined(BSD) && (BSD >= 199306) |
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bsd_arp_set(ia, haddr, halen); |
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#else |
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/* |
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* Oh well, SIOCSARP is not defined. Just run arp(8). |
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* Need to delete partial entry first on some systems. |
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* XXX - Gag! |
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*/ |
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int status; |
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char buf[256]; |
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char *a; |
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extern char *inet_ntoa(); |
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|
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a = inet_ntoa(*ia); |
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snprintf(buf, sizeof(buf), "arp -d %s; arp -s %s %s temp", |
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a, a, haddrtoa(haddr, halen)); |
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if (debug > 2) |
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report(LOG_INFO, "%s", buf); |
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status = system(buf); |
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if (status) |
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report(LOG_ERR, "arp failed, exit code=0x%x", status); |
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return; |
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#endif /* ! 4.4 BSD */ |
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#endif /* SIOCSARP */ |
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} |
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|
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|
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/* |
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* Convert a hardware address to an ASCII string. |
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*/ |
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char * |
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haddrtoa(haddr, hlen) |
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u_char *haddr; |
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int hlen; |
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{ |
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static char haddrbuf[3 * MAXHADDRLEN + 1]; |
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char *bufptr; |
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|
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if (hlen > MAXHADDRLEN) |
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hlen = MAXHADDRLEN; |
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|
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bufptr = haddrbuf; |
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while (hlen > 0) { |
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sprintf(bufptr, "%02X:", (unsigned) (*haddr++ & 0xFF)); |
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bufptr += 3; |
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hlen--; |
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} |
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bufptr[-1] = 0; |
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return (haddrbuf); |
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} |
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|
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|
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/* |
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* haddr_conv802() |
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* -------------- |
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* |
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* Converts a backwards address to a canonical address and a canonical address |
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* to a backwards address. |
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* |
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* INPUTS: |
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* adr_in - pointer to six byte string to convert (unsigned char *) |
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* addr_len - how many bytes to convert |
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* |
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* OUTPUTS: |
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* addr_out - The string is updated to contain the converted address. |
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* |
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* CALLER: |
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* many |
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* |
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* DATA: |
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* Uses conv802table to bit-reverse the address bytes. |
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*/ |
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|
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static u_char conv802table[256] = |
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{ |
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/* 0x00 */ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, |
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/* 0x08 */ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, |
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/* 0x10 */ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, |
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/* 0x18 */ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, |
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/* 0x20 */ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, |
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/* 0x28 */ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, |
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/* 0x30 */ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, |
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/* 0x38 */ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, |
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/* 0x40 */ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, |
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/* 0x48 */ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, |
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/* 0x50 */ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, |
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/* 0x58 */ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, |
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/* 0x60 */ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, |
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/* 0x68 */ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, |
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/* 0x70 */ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, |
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/* 0x78 */ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, |
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/* 0x80 */ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, |
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/* 0x88 */ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, |
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/* 0x90 */ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, |
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/* 0x98 */ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, |
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/* 0xA0 */ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, |
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/* 0xA8 */ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, |
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/* 0xB0 */ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, |
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/* 0xB8 */ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, |
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/* 0xC0 */ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, |
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/* 0xC8 */ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, |
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/* 0xD0 */ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, |
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/* 0xD8 */ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, |
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/* 0xE0 */ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, |
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/* 0xE8 */ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, |
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/* 0xF0 */ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, |
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/* 0xF8 */ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF, |
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}; |
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|
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void |
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haddr_conv802(addr_in, addr_out, len) |
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register u_char *addr_in, *addr_out; |
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int len; |
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{ |
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u_char *lim; |
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|
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lim = addr_out + len; |
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while (addr_out < lim) |
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*addr_out++ = conv802table[*addr_in++]; |
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} |
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|
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#if 0 |
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/* |
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* For the record, here is a program to generate the |
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* bit-reverse table above. |
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*/ |
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static int |
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bitrev(n) |
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int n; |
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{ |
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int i, r; |
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|
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r = 0; |
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for (i = 0; i < 8; i++) { |
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r <<= 1; |
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r |= (n & 1); |
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n >>= 1; |
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} |
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return r; |
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} |
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|
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main() |
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{ |
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int i; |
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for (i = 0; i <= 0xFF; i++) { |
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if ((i & 7) == 0) |
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printf("/* 0x%02X */", i); |
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printf(" 0x%02X,", bitrev(i)); |
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if ((i & 7) == 7) |
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printf("\n"); |
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} |
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} |
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|
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#endif |
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|
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/* |
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* Local Variables: |
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* tab-width: 4 |
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* c-indent-level: 4 |
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* c-argdecl-indent: 4 |
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* c-continued-statement-offset: 4 |
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* c-continued-brace-offset: -4 |
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* c-label-offset: -4 |
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* c-brace-offset: 0 |
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* End: |
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*/ |