src/misc-progs/netutil.h

   1
   2 #ifndef NETUTIL_H
   3 #define NETUTIL_H 1
   4
   5 #include <stdlib.h>
   6
   7 #define LETTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
   8 #define NUMBERS "0123456789"
   9 #define LETTERS_NUMBERS LETTERS NUMBERS
  10 #define IP_NUMBERS "./" NUMBERS
  11 #define PORT_NUMBERS ":-" NUMBERS
  12 #define VALID_FQDN LETTERS_NUMBERS ".-"
  13
  14 #define VALID_IP(ip) (strlen(ip) > 6 \
  15                 && strlen(ip) < 16 \
  16                 && strspn(ip, NUMBERS ".") == strlen(ip))
  17
  18 #define VALID_IP_AND_MASK(ip) (strlen(ip) > 6 \
  19                 && strlen(ip) < 32 \
  20                 && strspn(ip, IP_NUMBERS) == strlen(ip))
  21
  22 #define VALID_PORT(port) (strlen(port) \
  23                 && strlen(port) < 6 \
  24                 && strspn(port, NUMBERS) == strlen(port))
  25
  26 #define VALID_PORT_RANGE(port) (strlen(port) \
  27                 && strlen(port) < 12 \
  28                 && strspn(port, PORT_NUMBERS) == strlen(port))
  29
  30 #define VALID_SHORT_MASK(ip) (strlen(ip) > 1 \
  31                 && strlen(ip) < 3 \
  32                 && strspn(ip, NUMBERS) == strlen(ip))
  33
  34 /* Can't find any info on valid characters/length hopefully these are
  35  * reasonable guesses */
  36 #define VALID_DEVICE(dev) (strlen(dev) \
  37                 && strlen(dev) < 16 \
  38                 && strspn(dev, LETTERS_NUMBERS ":.") == strlen(dev))
  39
  40 /* Again, can't find any hard and fast rules for protocol names, these
  41  * restrictions are based on the keywords currently listed in
  42  * <http://www.iana.org/assignments/protocol-numbers>
  43  * though currently the ipcop cgis will only pass tcp, udp or gre anyway */
  44 #define VALID_PROTOCOL(prot) (strlen(prot) \
  45                 &&  strlen(prot) <16 \
  46                 &&  strspn(prot, LETTERS_NUMBERS "-") == strlen(prot))
  47
  48 #endif