diff options
Diffstat (limited to 'resolv')
| -rw-r--r-- | resolv/inet_addr.c | 50 | ||||
| -rw-r--r-- | resolv/tst-aton.c | 62 |
2 files changed, 91 insertions, 21 deletions
diff --git a/resolv/inet_addr.c b/resolv/inet_addr.c index d9b37015b3..e7f56d4588 100644 --- a/resolv/inet_addr.c +++ b/resolv/inet_addr.c @@ -60,6 +60,8 @@ static char rcsid[] = "$Id$"; #include <arpa/inet.h> #include <ctype.h> #ifdef _LIBC +# include <endian.h> +# include <stdint.h> # include <stdlib.h> # include <limits.h> # include <errno.h> @@ -100,17 +102,24 @@ inet_aton(cp, addr) #ifndef _LIBC register int base; #endif - register int n; register char c; - u_int32_t parts[4]; - register u_int32_t *pp = parts; + union iaddr { + uint8_t bytes[4]; + uint32_t word; + } res; +#if BYTE_ORDER == LITTLE_ENDIAN + register uint8_t *pp = res.bytes; +#else + register uint8_t *pp = &res.bytes[4]; +#endif + int digit; #ifdef _LIBC int saved_errno = errno; __set_errno (0); #endif - memset (parts, '\0', sizeof (parts)); + res.word = 0; c = *cp; for (;;) { @@ -123,12 +132,15 @@ inet_aton(cp, addr) goto ret_0; #ifdef _LIBC { - unsigned long ul = strtoul (cp, (char **) &cp, 0); + char *endp; + unsigned long ul = strtoul (cp, (char **) &endp, 0); if (ul == ULONG_MAX && errno == ERANGE) goto ret_0; if (ul > 0xfffffffful) goto ret_0; val = ul; + digit = cp != endp; + cp = endp; } c = *cp; #else @@ -160,9 +172,17 @@ inet_aton(cp, addr) * a.b.c (with c treated as 16 bits) * a.b (with b treated as 24 bits) */ - if (pp >= parts + 3) + if ((BYTE_ORDER == LITTLE_ENDIAN + && pp >= res.bytes + 3) + || (BYTE_ORDER == BIG_ENDIAN + && pp == res.bytes) + || val > 0xff) goto ret_0; +#if BYTE_ORDER == LITTLE_ENDIAN *pp++ = val; +#else + *--pp = val; +#endif c = *++cp; } else break; @@ -172,21 +192,21 @@ inet_aton(cp, addr) */ if (c != '\0' && (!isascii(c) || !isspace(c))) goto ret_0; + /* - * Concoct the address according to - * the number of parts specified. + * Did we get a valid digit? */ - n = pp - parts + 1; + if (!digit) + goto ret_0; - if (n == 0 /* initial nondigit */ - || parts[0] > 0xff || parts[1] > 0xff || parts[2] > 0xff - || val > max[n - 1]) + /* Check whether the last part is in its limits depending on + the number of parts in total. */ + if ((BYTE_ORDER == LITTLE_ENDIAN && val > max[pp - res.bytes]) + || (BYTE_ORDER == BIG_ENDIAN && val > max[res.bytes - pp])) goto ret_0; - val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); - if (addr) - addr->s_addr = htonl(val); + addr->s_addr = res.word | htonl (val); #ifdef _LIBC __set_errno (saved_errno); diff --git a/resolv/tst-aton.c b/resolv/tst-aton.c index 818f9ed61b..79077b00c3 100644 --- a/resolv/tst-aton.c +++ b/resolv/tst-aton.c @@ -3,19 +3,69 @@ #include <netinet/in.h> #include <arpa/inet.h> -enum { buf_size = 16 }; -static char buf[buf_size] = "323543357756889"; + +static struct tests +{ + const char *input; + int valid; + uint32_t result; +} tests[] = +{ + { "", 0, 0 }, + { "-1", 0, 0 }, + { "256", 1, 0x00000100 }, + { "256.", 0, 0 }, + { "256a", 0, 0 }, + { "0x100", 1, 0x00000100 }, + { "0200.0x123456", 1, 0x80123456 }, + { "0300.0x89123456.", 0 ,0 }, + { "0100.-0xffff0000", 0, 0 }, + { "0.0xffffff", 1, 0x00ffffff }, + { "0.0x1000000", 0, 0 }, + { "0377.16777215", 1, 0xffffffff }, + { "0377.16777216", 0, 0 }, + { "0x87.077777777", 1, 0x87ffffff }, + { "0x87.0100000000", 0, 0 }, + { "0.1.3", 1, 0x00010003 }, + { "0.256.3", 0, 0 }, + { "256.1.3", 0, 0 }, + { "0.1.0x10000", 0, 0 }, + { "0.1.0xffff", 1, 0x0001ffff }, + { "0.1a.3", 0, 0 }, + { "0.1.a3", 0, 0 }, + { "1.2.3.4", 1, 0x01020304 }, + { "0400.2.3.4", 0, 0 }, + { "1.0x100.3.4", 0, 0 }, + { "1.2.256.4", 0, 0 }, + { "1.2.3.0x100", 0, 0 }, + { "323543357756889", 0, 0 }, +}; + int main (int argc, char *argv[]) { - struct in_addr addr; int result = 0; + int cnt; - if (inet_aton (buf, &addr) != 0) + for (cnt = 0; cnt < sizeof (tests) / sizeof (tests[0]); ++cnt) { - printf ("%s is seen as a valid IP address\n", buf); - result = 1; + struct in_addr addr; + + if (inet_aton (tests[cnt].input, &addr) != tests[cnt].valid) + { + if (tests[cnt].valid) + printf ("\"%s\" not seen as valid IP address\n", tests[cnt].input); + else + printf ("\"%s\" seen as valid IP address\n", tests[cnt].input); + result = 1; + } + else if (tests[cnt].valid && addr.s_addr != ntohl (tests[cnt].result)) + { + printf ("\"%s\" not converted correctly: is %08x, should be %08x\n", + tests[cnt].input, addr.s_addr, tests[cnt].result); + result = 1; + } } return result; |