Lookups the IP address of host.
require 'socket' IPSocket.getaddress("localhost") #=> "127.0.0.1" IPSocket.getaddress("ip6-localhost") #=> "::1"
static VALUE ip_s_getaddress(VALUE obj, VALUE host) { union_sockaddr addr; struct rb_addrinfo *res = rsock_addrinfo(host, Qnil, AF_UNSPEC, SOCK_STREAM, 0); socklen_t len = res->ai->ai_addrlen; /* just take the first one */ memcpy(&addr, res->ai->ai_addr, len); rb_freeaddrinfo(res); return rsock_make_ipaddr(&addr.addr, len); }
Returns the local address as an array which contains address_family, port, hostname and numeric_address.
If reverse_lookup
is true
or
:hostname
, hostname is obtained from numeric_address using
reverse lookup. Or if it is false
, or :numeric
,
hostname is same as numeric_address. Or if it is nil
or
omitted, obeys to ipsocket.do_not_reverse_lookup
. See
Socket.getaddrinfo
also.
TCPSocket.open("www.ruby-lang.org", 80) {|sock| p sock.addr #=> ["AF_INET", 49429, "hal", "192.168.0.128"] p sock.addr(true) #=> ["AF_INET", 49429, "hal", "192.168.0.128"] p sock.addr(false) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"] p sock.addr(:hostname) #=> ["AF_INET", 49429, "hal", "192.168.0.128"] p sock.addr(:numeric) #=> ["AF_INET", 49429, "192.168.0.128", "192.168.0.128"] }
static VALUE ip_addr(int argc, VALUE *argv, VALUE sock) { rb_io_t *fptr; union_sockaddr addr; socklen_t len = (socklen_t)sizeof addr; int norevlookup; GetOpenFile(sock, fptr); if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup)) norevlookup = fptr->mode & FMODE_NOREVLOOKUP; if (getsockname(fptr->fd, &addr.addr, &len) < 0) rb_sys_fail("getsockname(2)"); return rsock_ipaddr(&addr.addr, len, norevlookup); }
Return a string describing this IPSocket object.
static VALUE ip_inspect(VALUE sock) { VALUE str = rb_call_super(0, 0); rb_io_t *fptr = RFILE(sock)->fptr; union_sockaddr addr; socklen_t len = (socklen_t)sizeof addr; ID id; if (fptr && fptr->fd >= 0 && getsockname(fptr->fd, &addr.addr, &len) >= 0 && (id = rsock_intern_family(addr.addr.sa_family)) != 0) { VALUE family = rb_id2str(id); char hbuf[1024], pbuf[1024]; long slen = RSTRING_LEN(str); const char last = (slen > 1 && RSTRING_PTR(str)[slen - 1] == '>') ? (--slen, '>') : 0; str = rb_str_subseq(str, 0, slen); rb_str_cat_cstr(str, ", "); rb_str_append(str, family); if (!rb_getnameinfo(&addr.addr, len, hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), NI_NUMERICHOST | NI_NUMERICSERV)) { rb_str_cat_cstr(str, ", "); rb_str_cat_cstr(str, hbuf); rb_str_cat_cstr(str, ", "); rb_str_cat_cstr(str, pbuf); } if (last) rb_str_cat(str, &last, 1); } return str; }
Returns the remote address as an array which contains address_family, port, hostname and numeric_address. It is defined for connection oriented socket such as TCPSocket.
If reverse_lookup
is true
or
:hostname
, hostname is obtained from numeric_address using
reverse lookup. Or if it is false
, or :numeric
,
hostname is same as numeric_address. Or if it is nil
or
omitted, obeys to ipsocket.do_not_reverse_lookup
. See
Socket.getaddrinfo
also.
TCPSocket.open("www.ruby-lang.org", 80) {|sock| p sock.peeraddr #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] p sock.peeraddr(true) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] p sock.peeraddr(false) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"] p sock.peeraddr(:hostname) #=> ["AF_INET", 80, "carbon.ruby-lang.org", "221.186.184.68"] p sock.peeraddr(:numeric) #=> ["AF_INET", 80, "221.186.184.68", "221.186.184.68"] }
static VALUE ip_peeraddr(int argc, VALUE *argv, VALUE sock) { rb_io_t *fptr; union_sockaddr addr; socklen_t len = (socklen_t)sizeof addr; int norevlookup; GetOpenFile(sock, fptr); if (argc < 1 || !rsock_revlookup_flag(argv[0], &norevlookup)) norevlookup = fptr->mode & FMODE_NOREVLOOKUP; if (getpeername(fptr->fd, &addr.addr, &len) < 0) rb_sys_fail("getpeername(2)"); return rsock_ipaddr(&addr.addr, len, norevlookup); }
Receives a message and return the message as a string and an address which the message come from.
maxlen is the maximum number of bytes to receive.
flags should be a bitwise OR of Socket::MSG_* constants.
ipaddr is same as IPSocket#{peeraddr,addr}.
u1 = UDPSocket.new u1.bind("127.0.0.1", 4913) u2 = UDPSocket.new u2.send "uuuu", 0, "127.0.0.1", 4913 p u1.recvfrom(10) #=> ["uuuu", ["AF_INET", 33230, "localhost", "127.0.0.1"]]
static VALUE ip_recvfrom(int argc, VALUE *argv, VALUE sock) { return rsock_s_recvfrom(sock, argc, argv, RECV_IP); }