diff options
Diffstat (limited to 'resolv/inet_addr.c')
| -rw-r--r-- | resolv/inet_addr.c | 62 |
1 files changed, 43 insertions, 19 deletions
diff --git a/resolv/inet_addr.c b/resolv/inet_addr.c index 32f58b0..41b6166 100644 --- a/resolv/inet_addr.c +++ b/resolv/inet_addr.c @@ -96,26 +96,14 @@ #include <limits.h> #include <errno.h> -/* ASCII IPv4 Internet address interpretation routine. The value - returned is in network order. */ -in_addr_t -__inet_addr (const char *cp) -{ - struct in_addr val; - - if (__inet_aton (cp, &val)) - return val.s_addr; - return INADDR_NONE; -} -weak_alias (__inet_addr, inet_addr) - /* Check whether "cp" is a valid ASCII representation of an IPv4 Internet address and convert it to a binary address. Returns 1 if the address is valid, 0 if not. This replaces inet_addr, the return value from which cannot distinguish between failure and a - local broadcast address. */ -int -__inet_aton (const char *cp, struct in_addr *addr) + local broadcast address. Write a pointer to the first + non-converted character to *endp. */ +static int +inet_aton_end (const char *cp, struct in_addr *addr, const char **endp) { static const in_addr_t max[4] = { 0xffffffff, 0xffffff, 0xffff, 0xff }; in_addr_t val; @@ -180,6 +168,7 @@ __inet_aton (const char *cp, struct in_addr *addr) if (addr != NULL) addr->s_addr = res.word | htonl (val); + *endp = cp; __set_errno (saved_errno); return 1; @@ -188,6 +177,41 @@ __inet_aton (const char *cp, struct in_addr *addr) __set_errno (saved_errno); return 0; } -weak_alias (__inet_aton, inet_aton) -libc_hidden_def (__inet_aton) -libc_hidden_weak (inet_aton) + +int +__inet_aton_exact (const char *cp, struct in_addr *addr) +{ + struct in_addr val; + const char *endp; + /* Check that inet_aton_end parsed the entire string. */ + if (inet_aton_end (cp, &val, &endp) != 0 && *endp == 0) + { + *addr = val; + return 1; + } + else + return 0; +} +libc_hidden_def (__inet_aton_exact) + +/* inet_aton ignores trailing garbage. */ +int +__inet_aton_ignore_trailing (const char *cp, struct in_addr *addr) +{ + const char *endp; + return inet_aton_end (cp, addr, &endp); +} +weak_alias (__inet_aton_ignore_trailing, inet_aton) + +/* ASCII IPv4 Internet address interpretation routine. The value + returned is in network order. */ +in_addr_t +__inet_addr (const char *cp) +{ + struct in_addr val; + const char *endp; + if (inet_aton_end (cp, &val, &endp)) + return val.s_addr; + return INADDR_NONE; +} +weak_alias (__inet_addr, inet_addr) |