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Don't use ctype.h functions.

This commit is contained in:
Nicholas J. Kain 2023-02-11 20:45:30 -05:00
parent 841c8663e9
commit aa684baad7
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1 changed files with 9 additions and 5 deletions
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14
ndhc.c
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@ -10,7 +10,6 @@
#include <signal.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
@ -198,14 +197,19 @@ static void setup_signals_ndhc(void)
suicide("sigaction failed");
}
static bool xisxdigit(int c)
{
return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'F') || (c >= 'a' && c <= 'f');
}
static int is_string_hwaddr(const char *str, size_t slen)
{
if (slen == 17 && str[2] == ':' && str[5] == ':' && str[8] == ':' &&
str[11] == ':' && str[14] == ':' &&
isxdigit(str[0]) && isxdigit(str[1]) && isxdigit(str[3]) &&
isxdigit(str[4]) && isxdigit(str[6]) && isxdigit(str[7]) &&
isxdigit(str[9]) && isxdigit(str[10]) && isxdigit(str[12]) &&
isxdigit(str[13]) && isxdigit(str[15]) && isxdigit(str[16])
xisxdigit(str[0]) && xisxdigit(str[1]) && xisxdigit(str[3]) &&
xisxdigit(str[4]) && xisxdigit(str[6]) && xisxdigit(str[7]) &&
xisxdigit(str[9]) && xisxdigit(str[10]) && xisxdigit(str[12]) &&
xisxdigit(str[13]) && xisxdigit(str[15]) && xisxdigit(str[16])
)
return 1;
return 0;