diff options
Diffstat (limited to 'dhcpcd/compat/linkaddr.c')
| -rw-r--r-- | dhcpcd/compat/linkaddr.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/dhcpcd/compat/linkaddr.c b/dhcpcd/compat/linkaddr.c new file mode 100644 index 00000000..c4e6fa54 --- /dev/null +++ b/dhcpcd/compat/linkaddr.c @@ -0,0 +1,120 @@ +/*- + * Copyright (c) 1990, 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. + */ + +#include <sys/cdefs.h> +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)linkaddr.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <net/if_dl.h> + +#include <string.h> + +/* States*/ +#define NAMING 0 +#define GOTONE 1 +#define GOTTWO 2 +#define RESET 3 +/* Inputs */ +#define DIGIT (4*0) +#define END (4*1) +#define DELIM (4*2) +#define LETTER (4*3) + +void +link_addr(addr, sdl) + const char *addr; + struct sockaddr_dl *sdl; +{ + char *cp = sdl->sdl_data; + char *cplim = sdl->sdl_len + (char *)(void *)sdl; + int byte = 0, state = NAMING; + int newaddr = 0; + + (void)memset(&sdl->sdl_family, 0, (size_t)sdl->sdl_len - 1); + sdl->sdl_family = AF_LINK; + do { + state &= ~LETTER; + if ((*addr >= '0') && (*addr <= '9')) { + newaddr = *addr - '0'; + } else if ((*addr >= 'a') && (*addr <= 'f')) { + newaddr = *addr - 'a' + 10; + } else if ((*addr >= 'A') && (*addr <= 'F')) { + newaddr = *addr - 'A' + 10; + } else if (*addr == 0) { + state |= END; + } else if (state == NAMING && + (((*addr >= 'A') && (*addr <= 'Z')) || + ((*addr >= 'a') && (*addr <= 'z')))) + state |= LETTER; + else + state |= DELIM; + addr++; + switch (state /* | INPUT */) { + case NAMING | DIGIT: + case NAMING | LETTER: + *cp++ = addr[-1]; + continue; + case NAMING | DELIM: + state = RESET; + sdl->sdl_nlen = cp - sdl->sdl_data; + continue; + case GOTTWO | DIGIT: + *cp++ = byte; + /* FALLTHROUGH */ + case RESET | DIGIT: + state = GOTONE; + byte = newaddr; + continue; + case GOTONE | DIGIT: + state = GOTTWO; + byte = newaddr + (byte << 4); + continue; + default: /* | DELIM */ + state = RESET; + *cp++ = byte; + byte = 0; + continue; + case GOTONE | END: + case GOTTWO | END: + *cp++ = byte; + /* FALLTHROUGH */ + case RESET | END: + break; + } + break; + } while (cp < cplim); + sdl->sdl_alen = cp - LLADDR(sdl); + newaddr = cp - (char *)(void *)sdl; + if ((size_t) newaddr > sizeof(*sdl)) + sdl->sdl_len = newaddr; + return; +} |