diff options
Diffstat (limited to 'resolv/inet_addr.c')
| -rw-r--r-- | resolv/inet_addr.c | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/resolv/inet_addr.c b/resolv/inet_addr.c index 635dd4596d..68659e9a04 100644 --- a/resolv/inet_addr.c +++ b/resolv/inet_addr.c @@ -102,13 +102,14 @@ inet_aton(cp, addr) register u_int32_t val; /* changed from u_long --david */ register int base, n; register char c; - u_int parts[4]; - register u_int *pp = parts; + u_int32_t parts[4]; + register u_int32_t *pp = parts; + #ifdef _LIBC int saved_errno = errno; - __set_errno (0); #endif + c = *cp; for (;;) { /* @@ -117,7 +118,18 @@ inet_aton(cp, addr) * 0x=hex, 0=octal, isdigit=decimal. */ if (!isdigit(c)) - return (0); + goto ret_0; +#ifdef _LIBC + { + unsigned long ul = strtoul (cp, (char **) &cp, 0); + if (ul == ULONG_MAX && errno == ERANGE) + goto ret_0; + if (ul > 0xfffffffful) + goto ret_0; + val = ul; + } + c = *cp; +#else base = 10; if (c == '0') { c = *++cp; @@ -126,15 +138,6 @@ inet_aton(cp, addr) else base = 8; } -#ifdef _LIBC - val = strtoul (cp, (char **) &cp, base); - if (val == ULONG_MAX && errno == ERANGE) - { - __set_errno (saved_errno); - return 0; - } - c = *cp; -#else val = 0; for (;;) { if (isascii(c) && isdigit(c)) { @@ -156,7 +159,7 @@ inet_aton(cp, addr) * a.b (with b treated as 24 bits) */ if (pp >= parts + 3) - return (0); + goto ret_0; *pp++ = val; c = *++cp; } else @@ -166,7 +169,7 @@ inet_aton(cp, addr) * Check for trailing characters. */ if (c != '\0' && (!isascii(c) || !isspace(c))) - return (0); + goto ret_0; /* * Concoct the address according to * the number of parts specified. @@ -175,30 +178,40 @@ inet_aton(cp, addr) switch (n) { case 0: - return (0); /* initial nondigit */ + goto ret_0; /* initial nondigit */ case 1: /* a -- 32 bits */ break; case 2: /* a.b -- 8.24 bits */ if (val > 0xffffff) - return (0); + goto ret_0; val |= parts[0] << 24; break; case 3: /* a.b.c -- 8.8.16 bits */ if (val > 0xffff) - return (0); + goto ret_0; val |= (parts[0] << 24) | (parts[1] << 16); break; case 4: /* a.b.c.d -- 8.8.8.8 bits */ if (val > 0xff) - return (0); + goto ret_0; val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); break; } if (addr) addr->s_addr = htonl(val); + +#ifdef _LIBC + __set_errno (saved_errno); +#endif return (1); + +ret_0: +#ifdef _LIBC + __set_errno (saved_errno); +#endif + return (0); } |