diff options
Diffstat (limited to 'REORG.TODO/resolv/inet_pton.c')
| -rw-r--r-- | REORG.TODO/resolv/inet_pton.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/REORG.TODO/resolv/inet_pton.c b/REORG.TODO/resolv/inet_pton.c new file mode 100644 index 0000000000..68f0fa5402 --- /dev/null +++ b/REORG.TODO/resolv/inet_pton.c @@ -0,0 +1,216 @@ +/* + * Copyright (c) 1996,1999 by Internet Software Consortium. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS + * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE + * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + */ + +#include <sys/param.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> +#include <ctype.h> +#include <string.h> +#include <errno.h> + +static int inet_pton4 (const char *src, unsigned char *dst); +static int inet_pton6 (const char *src, unsigned char *dst); + +/* Convert from presentation format (which usually means ASCII printable) + * to network format (which is usually some kind of binary format). + * + * return: + * 1 if the address was valid for the specified address family + * 0 if the address wasn't valid (`dst' is untouched in this case) + * -1 if some other error occurred (`dst' is untouched in this case, too) + * author: + * Paul Vixie, 1996. + */ +int +__inet_pton (int af, const char *src, void *dst) +{ + switch (af) + { + case AF_INET: + return inet_pton4 (src, dst); + case AF_INET6: + return inet_pton6 (src, dst); + default: + __set_errno (EAFNOSUPPORT); + return -1; + } +} +libc_hidden_def (__inet_pton) +weak_alias (__inet_pton, inet_pton) +libc_hidden_weak (inet_pton) + +/* Like inet_atonbut without all the hexadecimal, octal and shorthand. + * + * return: + * 1 if `src' is a valid dotted quad, else 0. + * notice: + * does not touch `dst' unless it's returning 1. + * author: + * Paul Vixie, 1996. + */ +static int +inet_pton4 (const char *src, unsigned char *dst) +{ + int saw_digit, octets, ch; + unsigned char tmp[NS_INADDRSZ], *tp; + + saw_digit = 0; + octets = 0; + *(tp = tmp) = 0; + while ((ch = *src++) != '\0') + { + if (ch >= '0' && ch <= '9') + { + unsigned int new = *tp * 10 + (ch - '0'); + + if (saw_digit && *tp == 0) + return 0; + if (new > 255) + return 0; + *tp = new; + if (! saw_digit) + { + if (++octets > 4) + return 0; + saw_digit = 1; + } + } + else if (ch == '.' && saw_digit) + { + if (octets == 4) + return 0; + *++tp = 0; + saw_digit = 0; + } + else + return 0; + } + if (octets < 4) + return 0; + memcpy (dst, tmp, NS_INADDRSZ); + return 1; +} + +/* Cconvert presentation level address to network order binary form. + * + * return: + * 1 if `src' is a valid [RFC1884 2.2] address, else 0. + * notice: + * (1) does not touch `dst' unless it's returning 1. + * (2) :: in a full address is silently ignored. + * credit: + * inspired by Mark Andrews. + * author: + * Paul Vixie, 1996. + */ +static int +inet_pton6 (const char *src, unsigned char *dst) +{ + static const char xdigits[] = "0123456789abcdef"; + unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp; + const char *curtok; + int ch, saw_xdigit; + unsigned int val; + + tp = memset (tmp, '\0', NS_IN6ADDRSZ); + endp = tp + NS_IN6ADDRSZ; + colonp = NULL; + /* Leading :: requires some special handling. */ + if (*src == ':') + if (*++src != ':') + return 0; + curtok = src; + saw_xdigit = 0; + val = 0; + while ((ch = tolower (*src++)) != '\0') + { + const char *pch; + + pch = strchr (xdigits, ch); + if (pch != NULL) + { + val <<= 4; + val |= (pch - xdigits); + if (val > 0xffff) + return 0; + saw_xdigit = 1; + continue; + } + if (ch == ':') + { + curtok = src; + if (!saw_xdigit) + { + if (colonp) + return 0; + colonp = tp; + continue; + } + else if (*src == '\0') + { + return 0; + } + if (tp + NS_INT16SZ > endp) + return 0; + *tp++ = (unsigned char) (val >> 8) & 0xff; + *tp++ = (unsigned char) val & 0xff; + saw_xdigit = 0; + val = 0; + continue; + } + if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) && + inet_pton4 (curtok, tp) > 0) + { + tp += NS_INADDRSZ; + saw_xdigit = 0; + break; /* '\0' was seen by inet_pton4. */ + } + return 0; + } + if (saw_xdigit) + { + if (tp + NS_INT16SZ > endp) + return 0; + *tp++ = (unsigned char) (val >> 8) & 0xff; + *tp++ = (unsigned char) val & 0xff; + } + if (colonp != NULL) + { + /* + * Since some memmove's erroneously fail to handle + * overlapping regions, we'll do the shift by hand. + */ + const int n = tp - colonp; + int i; + + if (tp == endp) + return 0; + for (i = 1; i <= n; i++) + { + endp[- i] = colonp[n - i]; + colonp[n - i] = 0; + } + tp = endp; + } + if (tp != endp) + return 0; + memcpy (dst, tmp, NS_IN6ADDRSZ); + return 1; +} |