diff options
| -rw-r--r-- | sys/net/radix.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/sys/net/radix.c b/sys/net/radix.c index 6b67f66..ada27ab 100644 --- a/sys/net/radix.c +++ b/sys/net/radix.c @@ -484,13 +484,13 @@ on1: struct radix_node * rn_addmask(void *n_arg, struct radix_node_head *maskhead, int search, int skip) { - caddr_t netmask = (caddr_t)n_arg; - register struct radix_node *x; - register caddr_t cp, cplim; - register int b = 0, mlen, j; + unsigned char *netmask = n_arg; + unsigned char *cp, *cplim; + struct radix_node *x; + int b = 0, mlen, j; int maskduplicated, isnormal; struct radix_node *saved_x; - char addmask_key[RADIX_MAX_KEY_LEN]; + unsigned char addmask_key[RADIX_MAX_KEY_LEN]; if ((mlen = LEN(netmask)) > RADIX_MAX_KEY_LEN) mlen = RADIX_MAX_KEY_LEN; @@ -532,20 +532,18 @@ rn_addmask(void *n_arg, struct radix_node_head *maskhead, int search, int skip) * Calculate index of mask, and check for normalcy. * First find the first byte with a 0 bit, then if there are * more bits left (remember we already trimmed the trailing 0's), - * the pattern must be one of those in normal_chars[], or we have + * the bits should be contiguous, otherwise we have got * a non-contiguous mask. */ +#define CONTIG(_c) (((~(_c) + 1) & (_c)) == (unsigned char)(~(_c) + 1)) cplim = netmask + mlen; isnormal = 1; for (cp = netmask + skip; (cp < cplim) && *(u_char *)cp == 0xff;) cp++; if (cp != cplim) { - static char normal_chars[] = { - 0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff}; - for (j = 0x80; (j & *cp) != 0; j >>= 1) b++; - if (*cp != normal_chars[b] || cp != (cplim - 1)) + if (!CONTIG(*cp) || cp != (cplim - 1)) isnormal = 0; } b += (cp - netmask) << 3; |
