lib/irc_ipv6.h

   1 /* IPv6 helper prototypes */
   2
   3 #ifndef __irc_ipv6_H
   4 #define __irc_ipv6_H
   5
   6 /* from res.h */
   7
   8 /** Structure to store an IP address. */
   9 struct irc_in_addr
  10 {
  11   unsigned short in6_16[8]; /**< IPv6 encoded parts, little-endian. */
  12 };
  13
  14 /** Structure to store an IP address and port number. */
  15 struct irc_sockaddr
  16 {
  17   struct irc_in_addr addr; /**< IP address. */
  18   unsigned short port;     /**< Port number, host-endian. */
  19 };
  20
  21 /** Evaluate to non-zero if \a ADDR is a valid address (not all 0s and not all 1s). */
  22 #define irc_in_addr_valid(ADDR) (((ADDR)->in6_16[0] && ~(ADDR)->in6_16[0]) \
  23                                  || (ADDR)->in6_16[1] != (ADDR)->in6_16[0] \
  24                                  || (ADDR)->in6_16[2] != (ADDR)->in6_16[0] \
  25                                  || (ADDR)->in6_16[3] != (ADDR)->in6_16[0] \
  26                                  || (ADDR)->in6_16[4] != (ADDR)->in6_16[0] \
  27                                  || (ADDR)->in6_16[5] != (ADDR)->in6_16[0] \
  28                                  || (ADDR)->in6_16[6] != (ADDR)->in6_16[0] \
  29                                  || (ADDR)->in6_16[7] != (ADDR)->in6_16[0])
  30 /** Evaluate to non-zero if \a ADDR (of type struct irc_in_addr) is an IPv4 address. */
  31 #define irc_in_addr_is_ipv4(ADDR) (!(ADDR)->in6_16[0] && !(ADDR)->in6_16[1] && !(ADDR)->in6_16[2] \
  32                                    && !(ADDR)->in6_16[3] && !(ADDR)->in6_16[4] && (ADDR)->in6_16[6] \
  33                                    && (!(ADDR)->in6_16[5] || (ADDR)->in6_16[5] == 65535))
  34 /** Evaluate to non-zero if \a A is a different IP than \a B. */
  35 #define irc_in_addr_cmp(A,B) (irc_in_addr_is_ipv4(A) ? ((A)->in6_16[6] != (B)->in6_16[6] \
  36                                   || (A)->in6_16[7] != (B)->in6_16[7] || !irc_in_addr_is_ipv4(B)) \
  37                               : memcmp((A), (B), sizeof(struct irc_in_addr)))
  38 /** Evaluate to non-zero if \a ADDR is a loopback address. */
  39 #define irc_in_addr_is_loopback(ADDR) (!(ADDR)->in6_16[0] && !(ADDR)->in6_16[1] && !(ADDR)->in6_16[2] \
  40                                        && !(ADDR)->in6_16[3] && !(ADDR)->in6_16[4] \
  41                                        && ((!(ADDR)->in6_16[5] \
  42                                             && ((!(ADDR)->in6_16[6] && (ADDR)->in6_16[7] == htons(1)) \
  43                                                 || (ntohs((ADDR)->in6_16[6]) & 0xff00) == 0x7f00)) \
  44                                            || (((ADDR)->in6_16[5] == 65535) \
  45                                                && (ntohs((ADDR)->in6_16[6]) & 0xff00) == 0x7f00)))
  46
  47
  48 /* from ircd_defs.h */
  49
  50 /** Maximum length of a numeric IP (v4 or v6) address.
  51  * "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"
  52  */
  53 #define SOCKIPLEN 45
  54
  55 /* from ircd_string.h */
  56
  57 extern const char* ircd_ntoa(const struct irc_in_addr* addr);
  58 extern const char* ircd_ntoa_r(char* buf, const struct irc_in_addr* addr);
  59 #define ircd_aton(ADDR, STR) ipmask_parse((STR), (ADDR), NULL)
  60 extern int ipmask_parse(const char *in, struct irc_in_addr *mask, unsigned char *bits_ptr);
  61
  62 #define IPtostr(ipaddr) ircd_ntoa(&(ipaddr))
  63
  64 /* from numnicks.h */
  65
  66 extern const char* iptobase64(char* buf, const struct irc_in_addr* addr, unsigned int count, int v6_ok);
  67 extern void base64toip(const char* s, struct irc_in_addr* addr);
  68
  69 /* from ircd_chattr.h */
  70
  71 /** Array mapping characters to attribute bitmasks. */
  72 extern const unsigned int  IRCD_CharAttrTab[];
  73
  74 #define NTL_DIGIT   0x0008  /**< 0123456789                          */
  75
  76 /** Test whether a character is a digit. */
  77 #define IsDigit(c)         (IRCD_CharAttrTab[(c) - CHAR_MIN] & NTL_DIGIT)
  78
  79 #endif /* __irc_ipv6_H */