diff options
Diffstat (limited to 'libexec/bootpd/hwaddr.c')
-rw-r--r-- | libexec/bootpd/hwaddr.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/libexec/bootpd/hwaddr.c b/libexec/bootpd/hwaddr.c new file mode 100644 index 0000000..840b953 --- /dev/null +++ b/libexec/bootpd/hwaddr.c @@ -0,0 +1,294 @@ +/* + * hwaddr.c - routines that deal with hardware addresses. + * (i.e. Ethernet) + */ + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/socket.h> +#include <sys/ioctl.h> + +#if defined(SUNOS) || defined(SVR4) +#include <sys/sockio.h> +#endif +#ifdef SVR4 +#include <sys/stream.h> +#include <stropts.h> +#include <fcntl.h> +#endif + +#include <net/if_arp.h> +#include <netinet/in.h> +#include <stdio.h> +#ifndef NO_UNISTD +#include <unistd.h> +#endif +#include <syslog.h> + +#ifndef USE_BFUNCS +/* Yes, memcpy is OK here (no overlapped copies). */ +#include <memory.h> +#define bcopy(a,b,c) memcpy(b,a,c) +#define bzero(p,l) memset(p,0,l) +#define bcmp(a,b,c) memcmp(a,b,c) +#endif + +/* For BSD 4.4, set arp entry by writing to routing socket */ +#if defined(BSD) +#if BSD >= 199306 +extern int bsd_arp_set __P((struct in_addr *, char *, int)); +#endif +#endif + +#include "bptypes.h" +#include "hwaddr.h" +#include "report.h" + +extern int debug; + +/* + * Hardware address lengths (in bytes) and network name based on hardware + * type code. List in order specified by Assigned Numbers RFC; Array index + * is hardware type code. Entries marked as zero are unknown to the author + * at this time. . . . + */ + +struct hwinfo hwinfolist[] = +{ + {0, "Reserved"}, /* Type 0: Reserved (don't use this) */ + {6, "Ethernet"}, /* Type 1: 10Mb Ethernet (48 bits) */ + {1, "3Mb Ethernet"}, /* Type 2: 3Mb Ethernet (8 bits) */ + {0, "AX.25"}, /* Type 3: Amateur Radio AX.25 */ + {1, "ProNET"}, /* Type 4: Proteon ProNET Token Ring */ + {0, "Chaos"}, /* Type 5: Chaos */ + {6, "IEEE 802"}, /* Type 6: IEEE 802 Networks */ + {0, "ARCNET"} /* Type 7: ARCNET */ +}; +int hwinfocnt = sizeof(hwinfolist) / sizeof(hwinfolist[0]); + + +/* + * Setup the arp cache so that IP address 'ia' will be temporarily + * bound to hardware address 'ha' of length 'len'. + */ +void +setarp(s, ia, ha, len) + int s; /* socket fd */ + struct in_addr *ia; + u_char *ha; + int len; +{ +#ifdef SIOCSARP + struct arpreq arpreq; /* Arp request ioctl block */ + struct sockaddr_in *si; +#ifdef SVR4 + int fd; + struct strioctl iocb; +#endif /* SVR4 */ + + bzero((caddr_t) & arpreq, sizeof(arpreq)); + arpreq.arp_flags = ATF_INUSE | ATF_COM; + + /* Set up the protocol address. */ + arpreq.arp_pa.sa_family = AF_INET; + si = (struct sockaddr_in *) &arpreq.arp_pa; + si->sin_addr = *ia; + + /* Set up the hardware address. */ + bcopy(ha, arpreq.arp_ha.sa_data, len); + +#ifdef SVR4 + /* + * And now the stuff for System V Rel 4.x which does not + * appear to allow SIOCxxx ioctls on a socket descriptor. + * Thanks to several people: (all sent the same fix) + * Barney Wolff <barney@databus.com>, + * bear@upsys.se (Bj|rn Sj|holm), + * Michael Kuschke <Michael.Kuschke@Materna.DE>, + */ + if ((fd=open("/dev/arp", O_RDWR)) < 0) { + report(LOG_ERR, "open /dev/arp: %s\n", get_errmsg()); + } + iocb.ic_cmd = SIOCSARP; + iocb.ic_timout = 0; + iocb.ic_dp = (char *)&arpreq; + iocb.ic_len = sizeof(arpreq); + if (ioctl(fd, I_STR, (caddr_t)&iocb) < 0) { + report(LOG_ERR, "ioctl I_STR: %s\n", get_errmsg()); + } + close (fd); + +#else /* SVR4 */ + /* + * On SunOS, the ioctl sometimes returns ENXIO, and it + * appears to happen when the ARP cache entry you tried + * to add is already in the cache. (Sigh...) + * XXX - Should this error simply be ignored? -gwr + */ + if (ioctl(s, SIOCSARP, (caddr_t) & arpreq) < 0) { + report(LOG_ERR, "ioctl SIOCSARP: %s", get_errmsg()); + } +#endif /* SVR4 */ +#else /* SIOCSARP */ +#if defined(BSD) && (BSD >= 199306) + bsd_arp_set(ia, ha, len); +#else /* Not BSD 4.4, and SIOCSARP not defined */ + /* + * Oh well, SIOCSARP is not defined. Just run arp(8). + * XXX - Gag! + */ + char buf[256]; + int status; + + sprintf(buf, "arp -s %s %s temp", + inet_ntoa(*ia), haddrtoa(ha, len)); + if (debug > 2) + report(LOG_INFO, buf); + status = system(buf); + if (status) + report(LOG_ERR, "arp failed, exit code=0x%x", status); + return; +#endif /* ! 4.4 BSD */ +#endif /* SIOCSARP */ +} + + +/* + * Convert a hardware address to an ASCII string. + */ +char * +haddrtoa(haddr, hlen) + u_char *haddr; + int hlen; +{ + static char haddrbuf[3 * MAXHADDRLEN + 1]; + char *bufptr; + + if (hlen > MAXHADDRLEN) + hlen = MAXHADDRLEN; + + bufptr = haddrbuf; + while (hlen > 0) { + sprintf(bufptr, "%02X:", (unsigned) (*haddr++ & 0xFF)); + bufptr += 3; + hlen--; + } + bufptr[-1] = 0; + return (haddrbuf); +} + + +/* + * haddr_conv802() + * -------------- + * + * Converts a backwards address to a canonical address and a canonical address + * to a backwards address. + * + * INPUTS: + * adr_in - pointer to six byte string to convert (unsigned char *) + * addr_len - how many bytes to convert + * + * OUTPUTS: + * addr_out - The string is updated to contain the converted address. + * + * CALLER: + * many + * + * DATA: + * Uses conv802table to bit-reverse the address bytes. + */ + +static u_char conv802table[256] = +{ + /* 0x00 */ 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, + /* 0x08 */ 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, + /* 0x10 */ 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, + /* 0x18 */ 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, + /* 0x20 */ 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, + /* 0x28 */ 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, + /* 0x30 */ 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, + /* 0x38 */ 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, + /* 0x40 */ 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, + /* 0x48 */ 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, + /* 0x50 */ 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, + /* 0x58 */ 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, + /* 0x60 */ 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, + /* 0x68 */ 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, + /* 0x70 */ 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, + /* 0x78 */ 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, + /* 0x80 */ 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, + /* 0x88 */ 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, + /* 0x90 */ 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, + /* 0x98 */ 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, + /* 0xA0 */ 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, + /* 0xA8 */ 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, + /* 0xB0 */ 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, + /* 0xB8 */ 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, + /* 0xC0 */ 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, + /* 0xC8 */ 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, + /* 0xD0 */ 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, + /* 0xD8 */ 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, + /* 0xE0 */ 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, + /* 0xE8 */ 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, + /* 0xF0 */ 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, + /* 0xF8 */ 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF, +}; + +void +haddr_conv802(addr_in, addr_out, len) + register u_char *addr_in, *addr_out; + int len; +{ + u_char *lim; + + lim = addr_out + len; + while (addr_out < lim) + *addr_out++ = conv802table[*addr_in++]; +} + +#if 0 +/* + * For the record, here is a program to generate the + * bit-reverse table above. + */ +static int +bitrev(n) + int n; +{ + int i, r; + + r = 0; + for (i = 0; i < 8; i++) { + r <<= 1; + r |= (n & 1); + n >>= 1; + } + return r; +} + +main() +{ + int i; + for (i = 0; i <= 0xFF; i++) { + if ((i & 7) == 0) + printf("/* 0x%02X */", i); + printf(" 0x%02X,", bitrev(i)); + if ((i & 7) == 7) + printf("\n"); + } +} + +#endif + +/* + * Local Variables: + * tab-width: 4 + * c-indent-level: 4 + * c-argdecl-indent: 4 + * c-continued-statement-offset: 4 + * c-continued-brace-offset: -4 + * c-label-offset: -4 + * c-brace-offset: 0 + * End: + */ |