diff options
Diffstat (limited to 'networking/ipcalc.c')
| -rw-r--r-- | networking/ipcalc.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/networking/ipcalc.c b/networking/ipcalc.c index af4eed4a4..94b747ef6 100644 --- a/networking/ipcalc.c +++ b/networking/ipcalc.c | |||
| @@ -22,15 +22,22 @@ | |||
| 22 | 22 | ||
| 23 | #define IPCALC_MSG(CMD,ALTCMD) if (mode & SILENT) {ALTCMD;} else {CMD;} | 23 | #define IPCALC_MSG(CMD,ALTCMD) if (mode & SILENT) {ALTCMD;} else {CMD;} |
| 24 | 24 | ||
| 25 | #define CLASS_A_NETMASK ntohl(0xFF000000) | ||
| 26 | #define CLASS_B_NETMASK ntohl(0xFFFF0000) | ||
| 27 | #define CLASS_C_NETMASK ntohl(0xFFFFFF00) | ||
| 28 | |||
| 25 | static unsigned long get_netmask(unsigned long ipaddr) | 29 | static unsigned long get_netmask(unsigned long ipaddr) |
| 26 | { | 30 | { |
| 27 | if (ipaddr & 0xC0) { | 31 | ipaddr = htonl(ipaddr); |
| 28 | return 0x00FFFFFF; /* Class C */ | 32 | |
| 29 | } | 33 | if ((ipaddr & 0xC0000000) == 0xC0000000) |
| 30 | if (ipaddr & 0x10) { | 34 | return CLASS_C_NETMASK; |
| 31 | return 0x0000FFFF; /* Class B */ | 35 | else if ((ipaddr & 0x80000000) == 0x80000000) |
| 32 | } | 36 | return CLASS_B_NETMASK; |
| 33 | return 0x000000FF; /* Class A */ | 37 | else if ((ipaddr & 0x80000000) == 0) |
| 38 | return CLASS_A_NETMASK; | ||
| 39 | else | ||
| 40 | return 0; | ||
| 34 | } | 41 | } |
| 35 | 42 | ||
| 36 | #define NETMASK 0x01 | 43 | #define NETMASK 0x01 |