akr	2012-04-20 19:51:25 +0900 (Fri, 20 Apr 2012)

  New Revision: 35415

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=35415

  Log:
    update doc.

  Modified files:
    trunk/ext/socket/raddrinfo.c

Index: ext/socket/raddrinfo.c
===================================================================
--- ext/socket/raddrinfo.c	(revision 35414)
+++ ext/socket/raddrinfo.c	(revision 35415)
@@ -1969,8 +1969,17 @@
  *
  * Similarly, PF_INET6 as family restricts for IPv6.
  *
- * flags should be bitwise OR of Socket::AI_??? constants.
+ * flags should be bitwise OR of Socket::AI_??? constants such as follows.
+ * Note that the exact list of the constants depends on OS.
  *
+ *   AI_PASSIVE      Get address to use with bind()
+ *   AI_CANONNAME    Fill in the canonical name
+ *   AI_NUMERICHOST  Prevent host name resolution
+ *   AI_NUMERICSERV  Prevent service name resolution
+ *   AI_V4MAPPED     Accept IPv4-mapped IPv6 addresses
+ *   AI_ALL          Allow all addresses
+ *   AI_ADDRCONFIG   Accept only if any address is assigned
+ *
  * Note that socktype should be specified whenever application knows the usage of the address.
  * Some platform causes an error when socktype is omitted and servname is specified as an integer
  * because some port numbers, 512 for example, are ambiguous without socktype.

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