diff options
| -rw-r--r-- | useful_functions.c | 36 |
1 files changed, 30 insertions, 6 deletions
diff --git a/useful_functions.c b/useful_functions.c index 5c45cb9..e0b1e4c 100644 --- a/useful_functions.c +++ b/useful_functions.c @@ -39,10 +39,13 @@ const unsigned char msk_type_broadcast[ETH_ALEN] = {255,255,255,255,255,255}; const unsigned char mac_type_bridge_group[ETH_ALEN] = {0x01,0x80,0xc2,0,0,0}; const unsigned char msk_type_bridge_group[ETH_ALEN] = {255,255,255,255,255,255}; -int ebt_printstyle_mac; /* - * flag = 2: byte always printed with 2 digits + * 0: default, print only 2 digits if necessary + * 2: always print 2 digits, a printed mac address + * then always has the same length */ +int ebt_printstyle_mac; + void ebt_print_mac(const char *mac) { if (ebt_printstyle_mac == 2) { @@ -136,7 +139,16 @@ int ebt_get_mac_and_mask(char *from, char *to, char *mask) return 0; } +/* + * 0: default + * 1: the inverse '!' of the option has already been specified + */ int ebt_invert = 0; + +/* + * Check if the inverse of the option is specified. This is used + * in the parse functions of the extensions and ebtables.c. + */ int ebt_check_inverse(const char option[]) { if (strcmp(option, "!") == 0) { @@ -149,6 +161,10 @@ int ebt_check_inverse(const char option[]) return ebt_invert; } +/* + * Make sure the same option wasn't specified twice. This is used + * in the parse functions of the extensions and ebtables.c. + */ void ebt_check_option(unsigned int *flags, unsigned int mask) { if (*flags & mask) @@ -156,7 +172,9 @@ void ebt_check_option(unsigned int *flags, unsigned int mask) *flags |= mask; } -/* put the ip string into 4 bytes */ +/* + * put the ip string into 4 bytes + */ static int undot_ip(char *ip, unsigned char *ip2) { char *p, *q, *end; @@ -186,7 +204,9 @@ static int undot_ip(char *ip, unsigned char *ip2) return 0; } -/* put the mask into 4 bytes */ +/* + * put the mask into 4 bytes + */ static int ip_mask(char *mask, unsigned char *mask2) { char *end; @@ -209,7 +229,9 @@ static int ip_mask(char *mask, unsigned char *mask2) return 0; } -/* set the ip mask and ip address */ +/* + * set the ip mask and ip address + */ void ebt_parse_ip_address(char *address, uint32_t *addr, uint32_t *msk) { char *p; @@ -227,7 +249,9 @@ void ebt_parse_ip_address(char *address, uint32_t *addr, uint32_t *msk) *addr = *addr & *msk; } -/* transform the ip mask into a string ready for output */ +/* + * transform the ip mask into a string ready for output + */ char *ebt_mask_to_dotted(uint32_t mask) { int i; |