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ruby--ruby/ext/socket/socket.c

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/************************************************
socket.c -
$Author$
$Date$
created at: Thu Mar 31 12:21:29 JST 1994
************************************************/
#include "ruby.h"
#include "rubyio.h"
#include "rubysig.h"
#include <stdio.h>
#include <sys/types.h>
#ifndef NT
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#include <errno.h>
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#ifdef USE_CWGUSI
extern int fileno(FILE *stream); /* <unix.mac.h> */
extern int rb_thread_select(int, fd_set*, fd_set*, fd_set*, struct timeval*); /* thread.c */
# include <sys/errno.h>
# include <GUSI.h>
#endif
#if defined(USE_THREAD) && defined(HAVE_FCNTL)
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <fcntl.h>
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK EAGAIN
#endif
VALUE rb_cBasicSocket;
VALUE rb_cIPsocket;
VALUE rb_cTCPsocket;
VALUE rb_cTCPserver;
VALUE rb_cUDPsocket;
#ifdef AF_UNIX
VALUE rb_cUNIXsocket;
VALUE rb_cUNIXserver;
#endif
VALUE rb_cSocket;
static VALUE rb_eSocket;
#ifdef SOCKS
VALUE rb_cSOCKSsocket;
void SOCKSinit();
int Rconnect();
#endif
char *strdup();
#define INET_CLIENT 0
#define INET_SERVER 1
#define INET_SOCKS 2
#ifdef NT
static void
sock_finalize(fptr)
OpenFile *fptr;
{
SOCKET s;
if (!fptr->f) return;
s = fileno(fptr->f);
free(fptr->f);
if (fptr->f2) free(fptr->f2);
closesocket(s);
}
#endif
static VALUE
sock_new(class, fd)
VALUE class;
int fd;
{
OpenFile *fp;
NEWOBJ(sock, struct RFile);
OBJSETUP(sock, class, T_FILE);
rb_secure(4);
MakeOpenFile(sock, fp);
fp->f = rb_fdopen(fd, "r");
#ifdef NT
fp->finalize = sock_finalize;
#endif
fp->f2 = rb_fdopen(fd, "w");
fp->mode = FMODE_READWRITE;
rb_io_unbuffered(fp);
rb_obj_call_init((VALUE)sock);
return (VALUE)sock;
}
static VALUE
bsock_shutdown(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
VALUE howto;
int how;
OpenFile *fptr;
rb_secure(4);
rb_scan_args(argc, argv, "01", &howto);
if (howto == Qnil)
how = 2;
else {
how = NUM2INT(howto);
if (how < 0 || 2 < how) {
rb_raise(rb_eArgError, "`how' should be either 0, 1, 2");
}
}
GetOpenFile(sock, fptr);
if (shutdown(fileno(fptr->f), how) == -1)
rb_sys_fail(0);
return INT2FIX(0);
}
static VALUE
bsock_close_read(sock)
VALUE sock;
{
OpenFile *fptr;
rb_secure(4);
GetOpenFile(sock, fptr);
if (fptr->f2 == 0) {
return rb_io_close(sock);
}
if (shutdown(fileno(fptr->f), 0) == -1)
rb_sys_fail(0);
fptr->mode &= ~FMODE_READABLE;
#ifdef NT
free(fptr->f);
#else
fclose(fptr->f);
#endif
fptr->f = fptr->f2;
fptr->f2 = 0;
return Qnil;
}
static VALUE
bsock_close_write(sock)
VALUE sock;
{
OpenFile *fptr;
rb_secure(4);
GetOpenFile(sock, fptr);
if (fptr->f2 == 0) {
return rb_io_close(sock);
}
if (shutdown(fileno(fptr->f), 1) == -1)
rb_sys_fail(0);
fptr->mode &= ~FMODE_WRITABLE;
#ifdef NT
free(fptr->f2);
#else
fclose(fptr->f2);
#endif
fptr->f2 = 0;
return Qnil;
}
static VALUE
bsock_setsockopt(sock, lev, optname, val)
VALUE sock, lev, optname, val;
{
int level, option;
OpenFile *fptr;
int i;
char *v;
int vlen;
rb_secure(2);
level = NUM2INT(lev);
option = NUM2INT(optname);
switch (TYPE(val)) {
case T_FIXNUM:
i = FIX2INT(val);
goto numval;
case T_FALSE:
i = 0;
goto numval;
case T_TRUE:
i = 1;
numval:
v = (char*)&i; vlen = sizeof(i);
break;
default:
v = rb_str2cstr(val, &vlen);
}
GetOpenFile(sock, fptr);
if (setsockopt(fileno(fptr->f), level, option, v, vlen) < 0)
rb_sys_fail(fptr->path);
return INT2FIX(0);
}
static VALUE
bsock_getsockopt(sock, lev, optname)
VALUE sock, lev, optname;
{
#if !defined(__BEOS__)
int level, option, len;
char *buf;
OpenFile *fptr;
level = NUM2INT(lev);
option = NUM2INT(optname);
len = 256;
buf = ALLOCA_N(char,len);
GetOpenFile(sock, fptr);
if (getsockopt(fileno(fptr->f), level, option, buf, &len) < 0)
rb_sys_fail(fptr->path);
return rb_str_new(buf, len);
#else
rb_notimplement();
#endif
}
static VALUE
bsock_getsockname(sock)
VALUE sock;
{
char buf[1024];
int len = sizeof buf;
OpenFile *fptr;
GetOpenFile(sock, fptr);
if (getsockname(fileno(fptr->f), (struct sockaddr*)buf, &len) < 0)
rb_sys_fail("getsockname(2)");
return rb_str_new(buf, len);
}
static VALUE
bsock_getpeername(sock)
VALUE sock;
{
char buf[1024];
int len = sizeof buf;
OpenFile *fptr;
GetOpenFile(sock, fptr);
if (getpeername(fileno(fptr->f), (struct sockaddr*)buf, &len) < 0)
rb_sys_fail("getpeername(2)");
return rb_str_new(buf, len);
}
static VALUE
bsock_send(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
VALUE msg, to;
VALUE flags;
OpenFile *fptr;
FILE *f;
int fd, n;
char *m, *t;
int mlen, tlen;
rb_secure(4);
rb_scan_args(argc, argv, "21", &msg, &flags, &to);
GetOpenFile(sock, fptr);
f = GetWriteFile(fptr);
fd = fileno(f);
retry:
#ifdef USE_THREAD
rb_thread_fd_writable(fd);
#endif
m = rb_str2cstr(msg, &mlen);
if (RTEST(to)) {
t = rb_str2cstr(to, &tlen);
n = sendto(fd, m, mlen, NUM2INT(flags),
(struct sockaddr*)t, tlen);
}
else {
n = send(fd, m, mlen, NUM2INT(flags));
}
if (n < 0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail("send(2)");
}
return INT2FIX(n);
}
static VALUE ipaddr _((struct sockaddr_in*));
#ifdef HAVE_SYS_UN_H
static VALUE unixaddr _((struct sockaddr_un*));
#endif
enum sock_recv_type {
RECV_RECV, /* BasicSocket#recv(no from) */
RECV_TCP, /* TCPsocket#recvfrom */
RECV_UDP, /* UDPsocket#recvfrom */
RECV_UNIX, /* UNIXsocket#recvfrom */
RECV_SOCKET, /* Socket#recvfrom */
};
static VALUE
s_recv(sock, argc, argv, from)
VALUE sock;
int argc;
VALUE *argv;
enum sock_recv_type from;
{
OpenFile *fptr;
VALUE str;
char buf[1024];
int fd, alen = sizeof buf;
VALUE len, flg;
int flags;
rb_scan_args(argc, argv, "11", &len, &flg);
if (flg == Qnil) flags = 0;
else flags = NUM2INT(flg);
str = rb_str_new(0, NUM2INT(len));
GetOpenFile(sock, fptr);
fd = fileno(fptr->f);
#ifdef USE_THREAD
rb_thread_wait_fd(fd);
#endif
TRAP_BEG;
retry:
RSTRING(str)->len = recvfrom(fd, RSTRING(str)->ptr, RSTRING(str)->len, flags,
(struct sockaddr*)buf, &alen);
TRAP_END;
if (RSTRING(str)->len < 0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail("recvfrom(2)");
}
rb_obj_taint(str);
switch (from) {
case RECV_RECV:
return (VALUE)str;
case RECV_TCP:
if (alen != sizeof(struct sockaddr_in)) {
rb_raise(rb_eTypeError, "sockaddr size differs - should not happen");
}
return rb_assoc_new(str, ipaddr((struct sockaddr_in *)buf));
case RECV_UDP:
{
VALUE addr = ipaddr((struct sockaddr_in *)buf);
return rb_assoc_new(str, rb_assoc_new(RARRAY(addr)->ptr[2],
RARRAY(addr)->ptr[1]));
}
#ifdef HAVE_SYS_UN_H
case RECV_UNIX:
return rb_assoc_new(str, unixaddr((struct sockaddr_un *)buf));
#endif
case RECV_SOCKET:
return rb_assoc_new(str, rb_str_new(buf, alen));
}
}
static VALUE
bsock_recv(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
return s_recv(sock, argc, argv, RECV_RECV);
}
static VALUE
mkipaddr(x)
unsigned long x;
{
char buf[16];
x = ntohl(x);
sprintf(buf, "%d.%d.%d.%d",
(int) (x>>24) & 0xff, (int) (x>>16) & 0xff,
(int) (x>> 8) & 0xff, (int) (x>> 0) & 0xff);
return rb_str_new2(buf);
}
static VALUE
ipaddr(sockaddr)
struct sockaddr_in *sockaddr;
{
VALUE family, port, addr1, addr2;
VALUE ary;
struct hostent *hostent;
family = rb_str_new2("AF_INET");
hostent = gethostbyaddr((char*)&sockaddr->sin_addr.s_addr,
sizeof(sockaddr->sin_addr),
AF_INET);
addr1 = 0;
if (hostent) {
addr1 = rb_str_new2(hostent->h_name);
}
addr2 = mkipaddr(sockaddr->sin_addr.s_addr);
if (!addr1) addr1 = addr2;
port = INT2FIX(ntohs(sockaddr->sin_port));
ary = rb_ary_new3(4, family, port, addr1, addr2);
return ary;
}
#ifndef HAVE_INET_ATON
static unsigned long
inet_aton(host, inp)
char *host;
struct in_addr *inp;
{
int d1, d2, d3, d4;
char ch;
if (sscanf(host, "%d.%d.%d.%d%c", &d1, &d2, &d3, &d4, &ch) == 4 &&
0 <= d1 && d1 <= 255 && 0 <= d2 && d2 <= 255 &&
0 <= d3 && d3 <= 255 && 0 <= d4 && d4 <= 255) {
inp->s_addr = htonl(
((long) d1 << 24) | ((long) d2 << 16) |
((long) d3 << 8) | ((long) d4 << 0));
return 1;
}
return 0;
}
#endif
static void
setipaddr(name, addr)
char *name;
struct sockaddr_in *addr;
{
struct hostent *hp;
if (name[0] == 0) {
addr->sin_addr.s_addr = INADDR_ANY;
}
else if (name[0] == '<' && strcmp(name, "<broadcast>") == 0) {
addr->sin_addr.s_addr = INADDR_BROADCAST;
}
else if (inet_aton(name, &addr->sin_addr) != 0) {
/* ok to set addr->sin_addr */
}
else {
hp = gethostbyname(name);
if (!hp) {
#ifdef HAVE_HSTRERROR
extern int h_errno;
rb_raise(rb_eSocket, (char *)hstrerror(h_errno));
#else
rb_raise(rb_eSocket, "host not found");
#endif
}
memcpy((char *) &addr->sin_addr, hp->h_addr, hp->h_length);
}
}
#if defined(USE_THREAD) && defined(HAVE_FCNTL)
static int
thread_connect(fd, sockaddr, len, type)
int fd;
struct sockaddr *sockaddr;
int len;
int type;
{
int status;
int mode;
fd_set fds;
mode = fcntl(fd, F_GETFL, 0);
#ifdef O_NDELAY
# define NONBLOCKING O_NDELAY
#else
#ifdef O_NBIO
# define NONBLOCKING O_NBIO
#else
# define NONBLOCKING O_NONBLOCK
#endif
#endif
fcntl(fd, F_SETFL, mode|NONBLOCKING);
for (;;) {
#ifdef SOCKS
if (type == INET_SOCKS) {
status = Rconnect(fd, sockaddr, len);
}
else
#endif
{
status = connect(fd, sockaddr, len);
}
if (status < 0) {
switch (errno) {
#ifdef EINPROGRESS
case EINPROGRESS:
#ifdef EAGAIN
case EAGAIN:
#endif
FD_ZERO(&fds);
FD_SET(fd, &fds);
rb_thread_select(fd+1, 0, &fds, 0, 0);
continue;
#endif
#ifdef EISCONN
case EISCONN:
#endif
#ifdef EALREADY
case EALREADY:
#endif
#if defined(EISCONN) || defined(EALREADY)
status = 0;
errno = 0;
break;
#endif
}
}
mode &= ~NONBLOCKING;
fcntl(fd, F_SETFL, mode);
return status;
}
}
#endif
static VALUE
open_inet(class, h, serv, type)
VALUE class, h, serv;
int type;
{
char *host;
struct hostent *hostent, _hostent;
struct servent *servent, _servent;
struct protoent *protoent;
struct sockaddr_in sockaddr;
int fd, status;
int hostaddr, hostaddrPtr[2];
int servport;
char *syscall;
if (h) {
Check_SafeStr(h);
host = RSTRING(h)->ptr;
hostent = gethostbyname(host);
if (hostent == NULL) {
if (!inet_aton(host, &sockaddr.sin_addr)) {
if (type == INET_SERVER && !strlen(host))
hostaddr = INADDR_ANY;
else {
#ifdef HAVE_HSTRERROR
extern int h_errno;
rb_raise(rb_eSocket, (char *)hstrerror(h_errno));
#else
rb_raise(rb_eSocket, "host not found");
#endif
}
}
hostaddr = sockaddr.sin_addr.s_addr;
_hostent.h_addr_list = (char **)hostaddrPtr;
_hostent.h_addr_list[0] = (char *)&hostaddr;
_hostent.h_addr_list[1] = NULL;
_hostent.h_length = sizeof(hostaddr);
_hostent.h_addrtype = AF_INET;
hostent = &_hostent;
}
}
servent = NULL;
if (FIXNUM_P(serv)) {
servport = FIX2UINT(serv);
goto setup_servent;
}
servent = getservbyname(STR2CSTR(serv), "tcp");
if (servent == NULL) {
char *s = STR2CSTR(serv);
char *end;
servport = strtoul(s, &end, 0);
if (*end != '\0') {
rb_raise(rb_eSocket, "no such servce %s", s);
}
setup_servent:
_servent.s_port = htons(servport);
_servent.s_proto = "tcp";
servent = &_servent;
}
#ifdef __BEOS__
fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
#else
protoent = getprotobyname(servent->s_proto);
if (protoent == NULL) {
rb_raise(rb_eSocket, "no such proto %s", servent->s_proto);
}
fd = socket(AF_INET, SOCK_STREAM, protoent->p_proto);
#endif
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
if (h) {
memcpy((char *)&(sockaddr.sin_addr.s_addr),
(char *) hostent->h_addr_list[0],
(size_t) hostent->h_length);
}
else {
sockaddr.sin_addr.s_addr = INADDR_ANY;
}
sockaddr.sin_port = servent->s_port;
if (type == INET_SERVER) {
status = 1;
setsockopt(fd,SOL_SOCKET,SO_REUSEADDR,(char*)&status,sizeof(status));
status = bind(fd, (struct sockaddr*)&sockaddr, sizeof(sockaddr));
syscall = "bind(2)";
}
else {
#if defined(USE_THREAD) && defined(HAVE_FCNTL)
status = thread_connect(fd, (struct sockaddr*)&sockaddr,
sizeof(sockaddr), type);
#else
#ifdef SOCKS
if (type == INET_SOCKS) {
status = Rconnect(fd, &sockaddr, sizeof(sockaddr));
}
else
#endif
{
status = connect(fd, (struct sockaddr*)&sockaddr, sizeof(sockaddr));
}
#endif
syscall = "connect(2)";
}
if (status < 0) {
close(fd);
rb_sys_fail(syscall);
}
if (type == INET_SERVER) listen(fd, 5);
/* create new instance */
return sock_new(class, fd);
}
static VALUE
tcp_s_open(class, host, serv)
VALUE class, host, serv;
{
Check_SafeStr(host);
return open_inet(class, host, serv, INET_CLIENT);
}
#ifdef SOCKS
static VALUE
socks_s_open(class, host, serv)
VALUE class, host, serv;
{
static init = 0;
if (init == 0) {
SOCKSinit("ruby");
init = 1;
}
Check_SafeStr(host);
return open_inet(class, host, serv, INET_SOCKS);
}
#endif
static VALUE
tcp_s_gethostbyname(obj, host)
VALUE obj, host;
{
struct sockaddr_in addr;
struct hostent *h;
char **pch;
VALUE ary, names;
setipaddr(STR2CSTR(host), &addr);
h = gethostbyaddr((char *)&addr.sin_addr,
sizeof(addr.sin_addr),
AF_INET);
if (h == NULL) {
#ifdef HAVE_HSTRERROR
extern int h_errno;
rb_raise(rb_eSocket, (char *)hstrerror(h_errno));
#else
rb_raise(rb_eSocket, "host not found");
#endif
}
ary = rb_ary_new();
rb_ary_push(ary, rb_str_new2(h->h_name));
names = rb_ary_new();
rb_ary_push(ary, names);
for (pch = h->h_aliases; *pch; pch++) {
rb_ary_push(names, rb_str_new2(*pch));
}
rb_ary_push(ary, NUM2INT(h->h_addrtype));
#ifdef h_addr
for (pch = h->h_addr_list; *pch; pch++) {
memcpy((char *) &addr.sin_addr, *pch, h->h_length);
rb_ary_push(ary, mkipaddr(addr.sin_addr.s_addr));
}
#else
memcpy((char *)&addr.sin_addr, h->h_addr, h->h_length);
rb_ary_push(ary, mkipaddr(addr.sin_addr.s_addr));
#endif
return ary;
}
static VALUE
tcp_svr_s_open(argc, argv, class)
int argc;
VALUE *argv;
VALUE class;
{
VALUE arg1, arg2;
if (rb_scan_args(argc, argv, "11", &arg1, &arg2) == 2)
return open_inet(class, arg1, arg2, INET_SERVER);
else
return open_inet(class, 0, arg1, INET_SERVER);
}
static VALUE
s_accept(class, fd, sockaddr, len)
VALUE class;
int fd;
struct sockaddr *sockaddr;
int *len;
{
int fd2;
retry:
#ifdef USE_THREAD
rb_thread_wait_fd(fd);
#endif
TRAP_BEG;
fd2 = accept(fd, sockaddr, len);
TRAP_END;
if (fd2 < 0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail(0);
}
return sock_new(class, fd2);
}
static VALUE
tcp_accept(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_in from;
int fromlen;
GetOpenFile(sock, fptr);
fromlen = sizeof(struct sockaddr_in);
return s_accept(rb_cTCPsocket, fileno(fptr->f),
(struct sockaddr*)&from, &fromlen);
}
static VALUE
tcp_recvfrom(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
return s_recv(sock, argc, argv, RECV_TCP);
}
#ifdef HAVE_SYS_UN_H
static VALUE
open_unix(class, path, server)
VALUE class;
struct RString *path;
int server;
{
struct sockaddr_un sockaddr;
int fd, status;
VALUE sock;
OpenFile *fptr;
Check_SafeStr(path);
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0) rb_sys_fail("socket(2)");
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sun_family = AF_UNIX;
strncpy(sockaddr.sun_path, path->ptr, sizeof(sockaddr.sun_path)-1);
sockaddr.sun_path[sizeof(sockaddr.sun_path)-1] = '\0';
if (server) {
status = bind(fd, (struct sockaddr*)&sockaddr, sizeof(sockaddr));
}
else {
status = connect(fd, (struct sockaddr*)&sockaddr, sizeof(sockaddr));
}
if (status < 0) {
close(fd);
rb_sys_fail(sockaddr.sun_path);
}
if (server) listen(fd, 5);
sock = sock_new(class, fd);
GetOpenFile(sock, fptr);
fptr->path = strdup(path->ptr);
return sock;
}
#endif
static VALUE
ip_addr(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_in addr;
int len = sizeof addr;
GetOpenFile(sock, fptr);
if (getsockname(fileno(fptr->f), (struct sockaddr*)&addr, &len) < 0)
rb_sys_fail("getsockname(2)");
return ipaddr(&addr);
}
static VALUE
ip_peeraddr(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_in addr;
int len = sizeof addr;
GetOpenFile(sock, fptr);
if (getpeername(fileno(fptr->f), (struct sockaddr*)&addr, &len) < 0)
rb_sys_fail("getpeername(2)");
return ipaddr(&addr);
}
static VALUE
ip_s_getaddress(obj, host)
VALUE obj, host;
{
struct sockaddr_in addr;
if (rb_obj_is_kind_of(host, rb_cInteger)) {
int i = NUM2INT(host);
addr.sin_addr.s_addr = htonl(i);
}
else {
setipaddr(STR2CSTR(host), &addr);
}
return mkipaddr(addr.sin_addr.s_addr);
}
static VALUE
udp_s_open(class)
VALUE class;
{
return sock_new(class, socket(AF_INET, SOCK_DGRAM, 0));
}
static void
udp_addrsetup(host, port, addr)
VALUE host, port;
struct sockaddr_in *addr;
{
memset(addr, 0, sizeof(struct sockaddr_in));
addr->sin_family = AF_INET;
if (NIL_P(host)) {
addr->sin_addr.s_addr = INADDR_ANY;
}
else if (rb_obj_is_kind_of(host, rb_cInteger)) {
int i = NUM2INT(host);
addr->sin_addr.s_addr = htonl(i);
}
else {
setipaddr(STR2CSTR(host), addr);
}
if (FIXNUM_P(port)) {
addr->sin_port = htons(FIX2INT(port));
}
else {
struct servent *servent;
servent = getservbyname(STR2CSTR(port), "udp");
if (servent) {
addr->sin_port = servent->s_port;
}
else {
char *s = STR2CSTR(port);
char *end;
int portno;
portno = strtoul(s, &end, 0);
if (*end != '\0') {
rb_raise(rb_eSocket, "no such servce %s", s);
}
addr->sin_port = htons(port);
}
}
}
static VALUE
udp_connect(sock, host, port)
VALUE sock, host, port;
{
struct sockaddr_in addr;
OpenFile *fptr;
udp_addrsetup(host, port, &addr);
GetOpenFile(sock, fptr);
retry:
if (connect(fileno(fptr->f), (struct sockaddr*)&addr, sizeof(addr))<0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail("connect(2)");
}
return INT2FIX(0);
}
static VALUE
udp_bind(sock, host, port)
VALUE sock, host, port;
{
struct sockaddr_in addr;
OpenFile *fptr;
udp_addrsetup(host, port, &addr);
GetOpenFile(sock, fptr);
if (bind(fileno(fptr->f), (struct sockaddr*)&addr, sizeof(addr))<0) {
rb_sys_fail("bind(2)");
}
return INT2FIX(0);
}
static VALUE
udp_send(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
VALUE mesg, flags, host, port;
struct sockaddr_in addr;
OpenFile *fptr;
FILE *f;
int n;
char *m;
int mlen;
if (argc == 2) {
return bsock_send(argc, argv, sock);
}
rb_scan_args(argc, argv, "4", &mesg, &flags, &host, &port);
udp_addrsetup(host, port, &addr);
GetOpenFile(sock, fptr);
f = GetWriteFile(fptr);
m = rb_str2cstr(mesg, &mlen);
retry:
n = sendto(fileno(f), m, mlen, NUM2INT(flags),
(struct sockaddr*)&addr, sizeof(addr));
if (n < 0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail("sendto(2)");
}
return INT2FIX(n);
}
static VALUE
udp_recvfrom(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
return s_recv(sock, argc, argv, RECV_UDP);
}
#ifdef HAVE_SYS_UN_H
static VALUE
unix_s_sock_open(sock, path)
VALUE sock, path;
{
return open_unix(sock, path, 0);
}
static VALUE
unix_path(sock)
VALUE sock;
{
OpenFile *fptr;
GetOpenFile(sock, fptr);
if (fptr->path == 0) {
struct sockaddr_un addr;
int len = sizeof(addr);
if (getsockname(fileno(fptr->f), (struct sockaddr*)&addr, &len) < 0)
rb_sys_fail(0);
fptr->path = strdup(addr.sun_path);
}
return rb_str_new2(fptr->path);
}
static VALUE
unix_svr_s_open(sock, path)
VALUE sock, path;
{
return open_unix(sock, path, 1);
}
static VALUE
unix_recvfrom(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
return s_recv(sock, argc, argv, RECV_UNIX);
}
static VALUE
unix_accept(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_un from;
int fromlen;
GetOpenFile(sock, fptr);
fromlen = sizeof(struct sockaddr_un);
return s_accept(rb_cUNIXsocket, fileno(fptr->f),
(struct sockaddr*)&from, &fromlen);
}
static VALUE
unixaddr(sockaddr)
struct sockaddr_un *sockaddr;
{
return rb_assoc_new(rb_str_new2("AF_UNIX"),rb_str_new2(sockaddr->sun_path));
}
static VALUE
unix_addr(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_un addr;
int len = sizeof addr;
GetOpenFile(sock, fptr);
if (getsockname(fileno(fptr->f), (struct sockaddr*)&addr, &len) < 0)
rb_sys_fail("getsockname(2)");
return unixaddr(&addr);
}
static VALUE
unix_peeraddr(sock)
VALUE sock;
{
OpenFile *fptr;
struct sockaddr_un addr;
int len = sizeof addr;
GetOpenFile(sock, fptr);
if (getpeername(fileno(fptr->f), (struct sockaddr*)&addr, &len) < 0)
rb_sys_fail("getsockname(2)");
return unixaddr(&addr);
}
#endif
static void
setup_domain_and_type(domain, dv, type, tv)
VALUE domain, type;
int *dv, *tv;
{
char *ptr;
if (TYPE(domain) == T_STRING) {
ptr = RSTRING(domain)->ptr;
if (strcmp(ptr, "AF_INET") == 0)
*dv = AF_INET;
#ifdef AF_UNIX
else if (strcmp(ptr, "AF_UNIX") == 0)
*dv = AF_UNIX;
#endif
#ifdef AF_ISO
else if (strcmp(ptr, "AF_ISO") == 0)
*dv = AF_ISO;
#endif
#ifdef AF_NS
else if (strcmp(ptr, "AF_NS") == 0)
*dv = AF_NS;
#endif
#ifdef AF_IMPLINK
else if (strcmp(ptr, "AF_IMPLINK") == 0)
*dv = AF_IMPLINK;
#endif
#ifdef PF_INET
else if (strcmp(ptr, "PF_INET") == 0)
*dv = PF_INET;
#endif
#ifdef PF_UNIX
else if (strcmp(ptr, "PF_UNIX") == 0)
*dv = PF_UNIX;
#endif
#ifdef PF_IMPLINK
else if (strcmp(ptr, "PF_IMPLINK") == 0)
*dv = PF_IMPLINK;
else if (strcmp(ptr, "AF_IMPLINK") == 0)
*dv = AF_IMPLINK;
#endif
#ifdef PF_AX25
else if (strcmp(ptr, "PF_AX25") == 0)
*dv = PF_AX25;
#endif
#ifdef PF_IPX
else if (strcmp(ptr, "PF_IPX") == 0)
*dv = PF_IPX;
#endif
else
rb_raise(rb_eSocket, "Unknown socket domain %s", ptr);
}
else {
*dv = NUM2INT(domain);
}
if (TYPE(type) == T_STRING) {
ptr = RSTRING(type)->ptr;
if (strcmp(ptr, "SOCK_STREAM") == 0)
*tv = SOCK_STREAM;
else if (strcmp(ptr, "SOCK_DGRAM") == 0)
*tv = SOCK_DGRAM;
#ifdef SOCK_RAW
else if (strcmp(ptr, "SOCK_RAW") == 0)
*tv = SOCK_RAW;
#endif
#ifdef SOCK_SEQPACKET
else if (strcmp(ptr, "SOCK_SEQPACKET") == 0)
*tv = SOCK_SEQPACKET;
#endif
#ifdef SOCK_RDM
else if (strcmp(ptr, "SOCK_RDM") == 0)
*tv = SOCK_RDM;
#endif
#ifdef SOCK_PACKET
else if (strcmp(ptr, "SOCK_PACKET") == 0)
*tv = SOCK_PACKET;
#endif
else
rb_raise(rb_eSocket, "Unknown socket type %s", ptr);
}
else {
*tv = NUM2INT(type);
}
}
static VALUE
sock_s_open(class, domain, type, protocol)
VALUE class, domain, type, protocol;
{
int fd;
int d, t;
setup_domain_and_type(domain, &d, type, &t);
fd = socket(d, t, NUM2INT(protocol));
if (fd < 0) rb_sys_fail("socket(2)");
return sock_new(class, fd);
}
static VALUE
sock_s_for_fd(class, fd)
VALUE class, fd;
{
return sock_new(class, NUM2INT(fd));
}
static VALUE
sock_s_socketpair(class, domain, type, protocol)
VALUE class, domain, type, protocol;
{
#if !defined(NT) && !defined(__BEOS__)
int d, t, sp[2];
setup_domain_and_type(domain, &d, type, &t);
if (socketpair(d, t, NUM2INT(protocol), sp) < 0)
rb_sys_fail("socketpair(2)");
return rb_assoc_new(sock_new(class, sp[0]), sock_new(class, sp[1]));
#else
rb_notimplement();
#endif
}
static VALUE
sock_connect(sock, addr)
VALUE sock, addr;
{
OpenFile *fptr;
Check_Type(addr, T_STRING);
rb_str_modify(addr);
GetOpenFile(sock, fptr);
retry:
if (connect(fileno(fptr->f), (struct sockaddr*)RSTRING(addr)->ptr, RSTRING(addr)->len) < 0) {
switch (errno) {
case EINTR:
case EWOULDBLOCK:
#if EAGAIN != EWOULDBLOCK
case EAGAIN:
#endif
#ifdef USE_THREAD
rb_thread_schedule();
#endif
goto retry;
}
rb_sys_fail("connect(2)");
}
return INT2FIX(0);
}
static VALUE
sock_bind(sock, addr)
VALUE sock, addr;
{
OpenFile *fptr;
Check_Type(addr, T_STRING);
rb_str_modify(addr);
GetOpenFile(sock, fptr);
if (bind(fileno(fptr->f), (struct sockaddr*)RSTRING(addr)->ptr, RSTRING(addr)->len) < 0)
rb_sys_fail("bind(2)");
return INT2FIX(0);
}
static VALUE
sock_listen(sock, log)
VALUE sock, log;
{
OpenFile *fptr;
GetOpenFile(sock, fptr);
if (listen(fileno(fptr->f), NUM2INT(log)) < 0)
rb_sys_fail("listen(2)");
return INT2FIX(0);
}
static VALUE
sock_recvfrom(argc, argv, sock)
int argc;
VALUE *argv;
VALUE sock;
{
return s_recv(sock, argc, argv, RECV_SOCKET);
}
static VALUE
sock_accept(sock)
VALUE sock;
{
OpenFile *fptr;
VALUE addr, sock2;
char buf[1024];
int len = sizeof buf;
GetOpenFile(sock, fptr);
sock2 = s_accept(rb_cSocket,fileno(fptr->f),(struct sockaddr*)buf,&len);
return rb_assoc_new(sock2, rb_str_new(buf, len));
}
#ifdef HAVE_GETHOSTNAME
static VALUE
sock_gethostname(obj)
VALUE obj;
{
char buf[1024];
if (gethostname(buf, (int)sizeof buf - 1) < 0)
rb_sys_fail("gethostname");
buf[sizeof buf - 1] = '\0';
return rb_str_new2(buf);
}
#else
#ifdef HAVE_UNAME
#include <sys/utsname.h>
static VALUE
sock_gethostname(obj)
VALUE obj;
{
struct utsname un;
uname(&un);
return rb_str_new2(un.nodename);
}
#else
static VALUE
sock_gethostname(obj)
VALUE obj;
{
rb_notimplement();
}
#endif
#endif
static VALUE
mkhostent(h)
struct hostent *h;
{
char **pch;
VALUE ary, names;
if (h == NULL) {
#ifdef HAVE_HSTRERROR
extern int h_errno;
rb_raise(rb_eSocket, (char *)hstrerror(h_errno));
#else
rb_raise(rb_eSocket, "host not found");
#endif
}
ary = rb_ary_new();
rb_ary_push(ary, rb_str_new2(h->h_name));
names = rb_ary_new();
rb_ary_push(ary, names);
for (pch = h->h_aliases; *pch; pch++) {
rb_ary_push(names, rb_str_new2(*pch));
}
rb_ary_push(ary, NUM2INT(h->h_addrtype));
#ifdef h_addr
for (pch = h->h_addr_list; *pch; pch++) {
rb_ary_push(ary, rb_str_new(*pch, h->h_length));
}
#else
rb_ary_push(ary, rb_str_new(h->h_addr, h->h_length));
#endif
return ary;
}
static VALUE
sock_s_gethostbyname(obj, host)
VALUE obj, host;
{
struct sockaddr_in addr;
struct hostent *h;
if (rb_obj_is_kind_of(host, rb_cInteger)) {
int i = NUM2INT(host);
addr.sin_addr.s_addr = htonl(i);
}
else {
setipaddr(STR2CSTR(host), &addr);
}
h = gethostbyaddr((char *)&addr.sin_addr,
sizeof(addr.sin_addr),
AF_INET);
return mkhostent(h);
}
static VALUE
sock_s_gethostbyaddr(argc, argv)
int argc;
VALUE *argv;
{
VALUE vaddr, vtype;
int type;
int alen;
char *addr;
struct hostent *h;
rb_scan_args(argc, argv, "11", &vaddr, &vtype);
addr = rb_str2cstr(vaddr, &alen);
if (!NIL_P(vtype)) {
type = NUM2INT(vtype);
}
else {
type = AF_INET;
}
h = gethostbyaddr(addr, alen, type);
return mkhostent(h);
}
static VALUE
sock_s_getservbyaname(argc, argv)
int argc;
VALUE *argv;
{
VALUE service, protocol;
char *proto;
struct servent *sp;
int port;
rb_scan_args(argc, argv, "11", &service, &protocol);
if (NIL_P(protocol)) proto = "tcp";
else proto = STR2CSTR(protocol);
sp = getservbyname(STR2CSTR(service), proto);
if (sp) {
port = ntohs(sp->s_port);
}
else {
char *s = STR2CSTR(service);
char *end;
port = strtoul(s, &end, 0);
if (*end != '\0') {
rb_raise(rb_eSocket, "no such servce %s/%s", s, proto);
}
}
return INT2FIX(port);
}
static VALUE mConst;
static void
sock_rb_define_const(name, value)
char *name;
int value;
{
rb_define_const(rb_cSocket, name, INT2FIX(value));
rb_define_const(mConst, name, INT2FIX(value));
}
Init_socket()
{
rb_eSocket = rb_define_class("SocketError", rb_eStandardError);
rb_cBasicSocket = rb_define_class("BasicSocket", rb_cIO);
rb_undef_method(CLASS_OF(rb_cBasicSocket), "new");
rb_undef_method(CLASS_OF(rb_cBasicSocket), "open");
rb_define_method(rb_cBasicSocket, "close_read", bsock_close_read, 0);
rb_define_method(rb_cBasicSocket, "close_write", bsock_close_write, 0);
rb_define_method(rb_cBasicSocket, "shutdown", bsock_shutdown, -1);
rb_define_method(rb_cBasicSocket, "setsockopt", bsock_setsockopt, 3);
rb_define_method(rb_cBasicSocket, "getsockopt", bsock_getsockopt, 2);
rb_define_method(rb_cBasicSocket, "getsockname", bsock_getsockname, 0);
rb_define_method(rb_cBasicSocket, "getpeername", bsock_getpeername, 0);
rb_define_method(rb_cBasicSocket, "send", bsock_send, -1);
rb_define_method(rb_cBasicSocket, "recv", bsock_recv, -1);
rb_cIPsocket = rb_define_class("IPsocket", rb_cBasicSocket);
rb_define_method(rb_cIPsocket, "addr", ip_addr, 0);
rb_define_method(rb_cIPsocket, "peeraddr", ip_peeraddr, 0);
rb_define_singleton_method(rb_cIPsocket, "getaddress", ip_s_getaddress, 1);
rb_cTCPsocket = rb_define_class("TCPsocket", rb_cIPsocket);
rb_define_singleton_method(rb_cTCPsocket, "open", tcp_s_open, 2);
rb_define_singleton_method(rb_cTCPsocket, "new", tcp_s_open, 2);
rb_define_singleton_method(rb_cTCPsocket, "gethostbyname", tcp_s_gethostbyname, 1);
rb_define_method(rb_cTCPsocket, "recvfrom", tcp_recvfrom, -1);
#ifdef SOCKS
rb_cSOCKSsocket = rb_define_class("SOCKSsocket", rb_cTCPsocket);
rb_define_singleton_method(rb_cSOCKSsocket, "open", socks_s_open, 2);
rb_define_singleton_method(rb_cSOCKSsocket, "new", socks_s_open, 2);
#endif
rb_cTCPserver = rb_define_class("TCPserver", rb_cTCPsocket);
rb_define_singleton_method(rb_cTCPserver, "open", tcp_svr_s_open, -1);
rb_define_singleton_method(rb_cTCPserver, "new", tcp_svr_s_open, -1);
rb_define_method(rb_cTCPserver, "accept", tcp_accept, 0);
rb_cUDPsocket = rb_define_class("UDPsocket", rb_cIPsocket);
rb_define_singleton_method(rb_cUDPsocket, "open", udp_s_open, 0);
rb_define_singleton_method(rb_cUDPsocket, "new", udp_s_open, 0);
rb_define_method(rb_cUDPsocket, "connect", udp_connect, 2);
rb_define_method(rb_cUDPsocket, "bind", udp_bind, 2);
rb_define_method(rb_cUDPsocket, "send", udp_send, -1);
rb_define_method(rb_cUDPsocket, "recvfrom", udp_recvfrom, -1);
#ifdef HAVE_SYS_UN_H
rb_cUNIXsocket = rb_define_class("UNIXsocket", rb_cBasicSocket);
rb_define_singleton_method(rb_cUNIXsocket, "open", unix_s_sock_open, 1);
rb_define_singleton_method(rb_cUNIXsocket, "new", unix_s_sock_open, 1);
rb_define_method(rb_cUNIXsocket, "path", unix_path, 0);
rb_define_method(rb_cUNIXsocket, "addr", unix_addr, 0);
rb_define_method(rb_cUNIXsocket, "peeraddr", unix_peeraddr, 0);
rb_define_method(rb_cUNIXsocket, "recvfrom", unix_recvfrom, -1);
rb_cUNIXserver = rb_define_class("UNIXserver", rb_cUNIXsocket);
rb_define_singleton_method(rb_cUNIXserver, "open", unix_svr_s_open, 1);
rb_define_singleton_method(rb_cUNIXserver, "new", unix_svr_s_open, 1);
rb_define_method(rb_cUNIXserver, "accept", unix_accept, 0);
#endif
rb_cSocket = rb_define_class("Socket", rb_cBasicSocket);
rb_define_singleton_method(rb_cSocket, "open", sock_s_open, 3);
rb_define_singleton_method(rb_cSocket, "new", sock_s_open, 3);
rb_define_singleton_method(rb_cSocket, "for_fd", sock_s_for_fd, 1);
rb_define_method(rb_cSocket, "connect", sock_connect, 1);
rb_define_method(rb_cSocket, "bind", sock_bind, 1);
rb_define_method(rb_cSocket, "listen", sock_listen, 1);
rb_define_method(rb_cSocket, "accept", sock_accept, 0);
rb_define_method(rb_cSocket, "recvfrom", sock_recvfrom, -1);
rb_define_singleton_method(rb_cSocket, "socketpair", sock_s_socketpair, 3);
rb_define_singleton_method(rb_cSocket, "pair", sock_s_socketpair, 3);
rb_define_singleton_method(rb_cSocket, "gethostname", sock_gethostname, 0);
rb_define_singleton_method(rb_cSocket, "gethostbyname", sock_s_gethostbyname, 1);
rb_define_singleton_method(rb_cSocket, "gethostbyaddr", sock_s_gethostbyaddr, -1);
rb_define_singleton_method(rb_cSocket, "getservbyname", sock_s_getservbyaname, -1);
/* constants */
mConst = rb_define_module_under(rb_cSocket, "Constants");
sock_rb_define_const("SOCK_STREAM", SOCK_STREAM);
sock_rb_define_const("SOCK_DGRAM", SOCK_DGRAM);
#ifdef SOCK_RAW
sock_rb_define_const("SOCK_RAW", SOCK_RAW);
#endif
#ifdef SOCK_RDM
sock_rb_define_const("SOCK_RDM", SOCK_RDM);
#endif
#ifdef SOCK_SEQPACKET
sock_rb_define_const("SOCK_SEQPACKET", SOCK_SEQPACKET);
#endif
#ifdef SOCK_PACKET
sock_rb_define_const("SOCK_PACKET", SOCK_PACKET);
#endif
sock_rb_define_const("AF_INET", AF_INET);
#ifdef PF_INET
sock_rb_define_const("PF_INET", PF_INET);
#endif
#ifdef AF_UNIX
sock_rb_define_const("AF_UNIX", AF_UNIX);
sock_rb_define_const("PF_UNIX", PF_UNIX);
#endif
#ifdef AF_AX25
sock_rb_define_const("AF_AX25", AF_AX25);
sock_rb_define_const("PF_AX25", PF_AX25);
#endif
#ifdef AF_IPX
sock_rb_define_const("AF_IPX", AF_IPX);
sock_rb_define_const("PF_IPX", PF_IPX);
#endif
#ifdef AF_APPLETALK
sock_rb_define_const("AF_APPLETALK", AF_APPLETALK);
sock_rb_define_const("PF_APPLETALK", PF_APPLETALK);
#endif
sock_rb_define_const("MSG_OOB", MSG_OOB);
#ifdef MSG_PEEK
sock_rb_define_const("MSG_PEEK", MSG_PEEK);
#endif
#ifdef MSG_DONTROUTE
sock_rb_define_const("MSG_DONTROUTE", MSG_DONTROUTE);
#endif
sock_rb_define_const("SOL_SOCKET", SOL_SOCKET);
#ifdef SOL_IP
sock_rb_define_const("SOL_IP", SOL_IP);
#endif
#ifdef SOL_IPX
sock_rb_define_const("SOL_IPX", SOL_IPX);
#endif
#ifdef SOL_AX25
sock_rb_define_const("SOL_AX25", SOL_AX25);
#endif
#ifdef SOL_ATALK
sock_rb_define_const("SOL_ATALK", SOL_ATALK);
#endif
#ifdef SOL_TCP
sock_rb_define_const("SOL_TCP", SOL_TCP);
#endif
#ifdef SOL_UDP
sock_rb_define_const("SOL_UDP", SOL_UDP);
#endif
#ifdef SO_DEBUG
sock_rb_define_const("SO_DEBUG", SO_DEBUG);
#endif
sock_rb_define_const("SO_REUSEADDR", SO_REUSEADDR);
#ifdef SO_TYPE
sock_rb_define_const("SO_TYPE", SO_TYPE);
#endif
#ifdef SO_ERROR
sock_rb_define_const("SO_ERROR", SO_ERROR);
#endif
#ifdef SO_DONTROUTE
sock_rb_define_const("SO_DONTROUTE", SO_DONTROUTE);
#endif
#ifdef SO_BROADCAST
sock_rb_define_const("SO_BROADCAST", SO_BROADCAST);
#endif
#ifdef SO_SNDBUF
sock_rb_define_const("SO_SNDBUF", SO_SNDBUF);
#endif
#ifdef SO_RCVBUF
sock_rb_define_const("SO_RCVBUF", SO_RCVBUF);
#endif
#ifdef SO_KEEPALIVE
sock_rb_define_const("SO_KEEPALIVE", SO_KEEPALIVE);
#endif
#ifdef SO_OOBINLINE
sock_rb_define_const("SO_OOBINLINE", SO_OOBINLINE);
#endif
#ifdef SO_NO_CHECK
sock_rb_define_const("SO_NO_CHECK", SO_NO_CHECK);
#endif
#ifdef SO_PRIORITY
sock_rb_define_const("SO_PRIORITY", SO_PRIORITY);
#endif
#ifdef SO_LINGER
sock_rb_define_const("SO_LINGER", SO_LINGER);
#endif
#ifdef SOPRI_INTERACTIVE
sock_rb_define_const("SOPRI_INTERACTIVE", SOPRI_INTERACTIVE);
#endif
#ifdef SOPRI_NORMAL
sock_rb_define_const("SOPRI_NORMAL", SOPRI_NORMAL);
#endif
#ifdef SOPRI_BACKGROUND
sock_rb_define_const("SOPRI_BACKGROUND", SOPRI_BACKGROUND);
#endif
#ifdef IP_MULTICAST_IF
sock_rb_define_const("IP_MULTICAST_IF", IP_MULTICAST_IF);
#endif
#ifdef IP_MULTICAST_TTL
sock_rb_define_const("IP_MULTICAST_TTL", IP_MULTICAST_TTL);
#endif
#ifdef IP_MULTICAST_LOOP
sock_rb_define_const("IP_MULTICAST_LOOP", IP_MULTICAST_LOOP);
#endif
#ifdef IP_ADD_MEMBERSHIP
sock_rb_define_const("IP_ADD_MEMBERSHIP", IP_ADD_MEMBERSHIP);
#endif
#ifdef IP_DEFAULT_MULTICAST_TTL
sock_rb_define_const("IP_DEFAULT_MULTICAST_TTL", IP_DEFAULT_MULTICAST_TTL);
#endif
#ifdef IP_DEFAULT_MULTICAST_LOOP
sock_rb_define_const("IP_DEFAULT_MULTICAST_LOOP", IP_DEFAULT_MULTICAST_LOOP);
#endif
#ifdef IP_MAX_MEMBERSHIPS
sock_rb_define_const("IP_MAX_MEMBERSHIPS", IP_MAX_MEMBERSHIPS);
#endif
#ifdef IPX_TYPE
sock_rb_define_const("IPX_TYPE", IPX_TYPE);
#endif
#ifdef TCP_NODELAY
sock_rb_define_const("TCP_NODELAY", TCP_NODELAY);
#endif
#ifdef TCP_MAXSEG
sock_rb_define_const("TCP_MAXSEG", TCP_MAXSEG);
#endif
}
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