1Socket6(3) User Contributed Perl Documentation Socket6(3)
2
6 Socket6 - IPv6 related part of the C socket.h defines and structure
7 manipulators
8
10 use Socket;
11 use Socket6;
12 @res = getaddrinfo('hishost.com', 'daytime', AF_UNSPEC, SOCK_STREAM);
14 $family = -1;
15 while (scalar(@res) >= 5) {
16 ($family, $socktype, $proto, $saddr, $canonname, @res) = @res;
17 ($host, $port) = getnameinfo($saddr, NI_NUMERICHOST | NI_NUMERICSERV);
19 print STDERR "Trying to connect to $host port $port...\n";
20 socket(Socket_Handle, $family, $socktype, $proto) || next;
22 connect(Socket_Handle, $saddr) && last;
23 close(Socket_Handle);
25 $family = -1;
26 }
27 if ($family != -1) {
29 print STDERR "connected to $host port $port\n";
30 } else {
31 die "connect attempt failed\n";
32 }
33
35 This module provides glue routines to the various IPv6 functions.
36 If you use the Socket6 module, be sure to specify "use Socket" as well
38 as "use Socket6".
39 Functions supplied are:
41 inet_pton FAMILY, TEXT_ADDRESS
43 This function takes an IP address in presentation (or string) format
44 and converts it into numeric (or binary) format.
45 The type of IP address conversion (IPv4 versus IPv6) is controlled
46 by the FAMILY argument.
47 inet_ntop FAMILY, BINARY_ADDRESS
49 This function takes an IP address in numeric (or binary) format
50 and converts it into presentation (or string) format
51 The type of IP address conversion (IPv4 versus IPv6) is controlled
52 by the FAMILY argument.
53 pack_sockaddr_in6 PORT, ADDR
55 This function takes two arguments: a port number, and a 16-octet
56 IPv6 address structure (as returned by inet_pton()).
57 It returns the sockaddr_in6 structure with these arguments packed
58 into their correct fields, as well as the AF_INET6 family.
59 The other fields are not set and their values should not be relied upon.
60 pack_sockaddr_in6_all PORT, FLOWINFO, ADDR, SCOPEID
62 This function takes four arguments: a port number, a 16-octet
63 IPv6 address structure (as returned by inet_pton), any
64 special flow information, and any specific scope information.
65 It returns a complete sockaddr_in6 structure with these arguments packed
66 into their correct fields, as well as the AF_INET6 family.
67 unpack_sockaddr_in6 NAME
69 This function takes a sockaddr_in6 structure (as returned by
70 pack_sockaddr_in6()) and returns a list of two elements:
71 the port number and the 16-octet IP address.
72 This function will croak if it determines it has not been
73 passed an IPv6 structure.
74 unpack_sockaddr_in6_all NAME
76 This function takes a sockaddr_in6 structure (as returned by
77 pack_sockaddr_in6()) and returns a list of four elements:
78 the port number, the flow information, the 16-octet IP address,
79 and the scope information.
80 This function will croak if it determines it has not been
81 passed an IPv6 structure.
82 gethostbyname2 HOSTNAME, FAMILY
84 getaddrinfo NODENAME, SERVICENAME, [FAMILY, SOCKTYPE, PROTOCOL, FLAGS]
85 This function converts node names to addresses and service names
86 to port numbers.
87 If the NODENAME argument is not a false value,
88 then a nodename to address lookup is performed;
89 otherwise a service name to port number lookup is performed.
90 At least one of NODENAME and SERVICENAME must have a true value.
91 If the lookup is successful, a list consisting of multiples of
93 five elements is returned.
94 Each group of five elements consists of the address family,
95 socket type, protocol, 16-octet IP address, and the canonical
96 name (undef if the node name passed is already the canonical name).
97 The arguments FAMILY, SOCKTYPE, PROTOCOL, and FLAGS are all optional.
99 This function will croak if it determines it has not been
101 passed an IPv6 structure.
102 If the lookup is unsuccessful, the function returns a single scalar.
104 This will contain the string version of that error in string context,
105 and the numeric value in numeric context.
106 getnameinfo NAME, [FLAGS]
108 This function takes a socket address structure. If successful, it returns
109 two strings containing the node name and service name.
110 The optional FLAGS argument controls what kind of lookup is performed.
112 If the lookup is unsuccessful, the function returns a single scalar.
114 This will contain the string version of that error in string context,
115 and the numeric value in numeric context.
116 getipnodebyname HOST, [FAMILY, FLAGS]
118 This function takes either a node name or an IP address string
119 and performs a lookup on that name (or conversion of the string).
120 It returns a list of five elements: the canonical host name,
121 the address family, the length in octets of the IP addresses
122 returned, a reference to a list of IP address structures, and
123 a reference to a list of aliases for the host name.
124 The arguments FAMILY and FLAGS are optional.
126 Note: This function does not handle IPv6 scope identifiers,
127 and should be used with care.
128 And, this function was deprecated in RFC3493.
129 The getnameinfo function should be used instead.
130 getipnodebyaddr FAMILY, ADDRESS
132 This function takes an IP address family and an IP address structure
133 and performs a reverse lookup on that address.
134 It returns a list of five elements: the canonical host name,
135 the address family, the length in octets of the IP addresses
136 returned, a reference to a list of IP address structures, and
137 a reference to a list of aliases for the host name.
138 Note: This function does not handle IPv6 scope identifiers,
140 and should be used with care.
141 And, this function was deprecated in RFC3493.
142 The getaddrinfo function should be used instead.
143 gai_strerror ERROR_NUMBER
145 This function returns a string corresponding to the error number
146 passed in as an argument.
147 in6addr_any
149 This function returns the 16-octet wildcard address.
150 in6addr_loopback
152 This function returns the 16-octet loopback address.
153perl v5.32.0 2020-07-28 Socket6(3)