/*
* socket_efun.c -- socket efuns for MudOS.
* 5-92 : Dwayne Fontenot (Jacques@TMI) : original coding.
* 10-92 : Dave Richards (Cynosure) : less original coding.
*/
#include "std.h"
#include "socket_efuns.h"
#include "socket_err.h"
#include "include/socket_err.h"
#include "socket_ctrl.h"
#include "comm.h"
#include "file.h"
#include "master.h"
#if defined(PACKAGE_SOCKETS) || defined(PACKAGE_EXTERNAL)
/* flags for socket_close */
#define SC_FORCE 1
#define SC_DO_CALLBACK 2
#define SC_FINAL_CLOSE 4
lpc_socket_t *lpc_socks = 0;
int max_lpc_socks = 0;
#ifdef PACKAGE_SOCKETS
#ifdef IPV6
static int socket_name_to_sin (const char *, struct sockaddr_in6 *);
static char *inet_address (struct sockaddr_in6 *);
#else
static int socket_name_to_sin (const char *, struct sockaddr_in *);
static char *inet_address (struct sockaddr_in *);
#endif
#endif
/*
* check permission
*/
int check_valid_socket (const char * const what, int fd, object_t * owner,
const char * const addr, int port)
{
array_t *info;
svalue_t *mret;
info = allocate_empty_array(4);
info->item[0].type = T_NUMBER;
info->item[0].u.number = fd;
assign_socket_owner(&info->item[1], owner);
info->item[2].type = T_STRING;
info->item[2].subtype = STRING_SHARED;
info->item[2].u.string = make_shared_string(addr);
info->item[3].type = T_NUMBER;
info->item[3].u.number = port;
push_object(current_object);
push_constant_string(what);
push_refed_array(info);
mret = apply_master_ob(APPLY_VALID_SOCKET, 3);
return MASTER_APPROVED(mret);
}
static void clear_socket (int which, int dofree)
{
if (dofree) {
set_read_callback(which, 0);
set_write_callback(which, 0);
set_close_callback(which, 0);
}
lpc_socks[which].fd = -1;
lpc_socks[which].flags = 0;
lpc_socks[which].mode = MUD;
lpc_socks[which].state = STATE_CLOSED;
memset((char *) &lpc_socks[which].l_addr, 0, sizeof(lpc_socks[which].l_addr));
memset((char *) &lpc_socks[which].r_addr, 0, sizeof(lpc_socks[which].r_addr));
lpc_socks[which].owner_ob = NULL;
lpc_socks[which].release_ob = NULL;
lpc_socks[which].read_callback.s = 0;
lpc_socks[which].write_callback.s = 0;
lpc_socks[which].close_callback.s = 0;
lpc_socks[which].r_buf = NULL;
lpc_socks[which].r_off = 0;
lpc_socks[which].r_len = 0;
lpc_socks[which].w_buf = NULL;
lpc_socks[which].w_off = 0;
lpc_socks[which].w_len = 0;
}
/*
* Get more LPC sockets structures if we run out
*/
static int more_lpc_sockets()
{
int i;
max_lpc_socks += 10;
if (!lpc_socks)
lpc_socks = CALLOCATE(10, lpc_socket_t, TAG_SOCKETS, "more_lpc_sockets");
else
lpc_socks = RESIZE(lpc_socks, max_lpc_socks, lpc_socket_t, TAG_SOCKETS, "more_lpc_sockets");
i = max_lpc_socks;
while (--i >= max_lpc_socks - 10)
clear_socket(i, 0);
return max_lpc_socks - 10;
}
/*
* Set the callbacks for a socket
*/
void set_read_callback (int which, svalue_t * cb)
{
char *s;
if (lpc_socks[which].flags & S_READ_FP) {
free_funp(lpc_socks[which].read_callback.f);
lpc_socks[which].flags &= ~S_READ_FP;
} else if ((s = lpc_socks[which].read_callback.s))
free_string(s);
if (cb) {
if (cb->type == T_FUNCTION) {
lpc_socks[which].flags |= S_READ_FP;
lpc_socks[which].read_callback.f = cb->u.fp;
cb->u.fp->hdr.ref++;
} else {
lpc_socks[which].read_callback.s = make_shared_string(cb->u.string);
}
} else
lpc_socks[which].read_callback.s = 0;
}
void set_write_callback (int which, svalue_t * cb)
{
char *s;
if (lpc_socks[which].flags & S_WRITE_FP) {
free_funp(lpc_socks[which].write_callback.f);
lpc_socks[which].flags &= ~S_WRITE_FP;
} else if ((s = lpc_socks[which].write_callback.s))
free_string(s);
if (cb) {
if (cb->type == T_FUNCTION) {
lpc_socks[which].flags |= S_WRITE_FP;
lpc_socks[which].write_callback.f = cb->u.fp;
cb->u.fp->hdr.ref++;
} else {
lpc_socks[which].write_callback.s = make_shared_string(cb->u.string);
}
} else
lpc_socks[which].write_callback.s = 0;
}
void set_close_callback (int which, svalue_t * cb)
{
char *s;
if (lpc_socks[which].flags & S_CLOSE_FP) {
free_funp(lpc_socks[which].close_callback.f);
lpc_socks[which].flags &= ~S_CLOSE_FP;
} else if ((s = lpc_socks[which].close_callback.s))
free_string(s);
if (cb) {
if (cb->type == T_FUNCTION) {
lpc_socks[which].flags |= S_CLOSE_FP;
lpc_socks[which].close_callback.f = cb->u.fp;
cb->u.fp->hdr.ref++;
} else {
lpc_socks[which].close_callback.s = make_shared_string(cb->u.string);
}
} else
lpc_socks[which].close_callback.s = 0;
}
#ifdef PACKAGE_SOCKETS
static void copy_close_callback (int to, int from)
{
char *s;
if (lpc_socks[to].flags & S_CLOSE_FP) {
free_funp(lpc_socks[to].close_callback.f);
} else if ((s = lpc_socks[to].close_callback.s))
free_string(s);
if (lpc_socks[from].flags & S_CLOSE_FP) {
lpc_socks[to].flags |= S_CLOSE_FP;
lpc_socks[to].close_callback.f = lpc_socks[from].close_callback.f;
lpc_socks[to].close_callback.f->hdr.ref++;
} else {
lpc_socks[to].flags &= ~S_CLOSE_FP;
s = lpc_socks[to].close_callback.s = lpc_socks[from].close_callback.s;
if (s)
ref_string(s);
}
}
#endif
int find_new_socket (void)
{
int i;
for (i = 0; i < max_lpc_socks; i++) {
if (lpc_socks[i].state == STATE_CLOSED)
return i;
}
return more_lpc_sockets();
}
#ifdef PACKAGE_SOCKETS
/*
* Create an LPC efun socket
*/
int socket_create (enum socket_mode mode, svalue_t * read_callback, svalue_t * close_callback)
{
int type, i, fd, optval;
#ifndef NO_BUFFER_TYPE
int binary = 0;
if (mode == STREAM_BINARY) {
binary = 1;
mode = STREAM;
} else if (mode == DATAGRAM_BINARY) {
binary = 1;
mode = DATAGRAM;
}
#endif
switch (mode) {
case MUD:
case STREAM:
type = SOCK_STREAM;
break;
case DATAGRAM:
type = SOCK_DGRAM;
break;
default:
return EEMODENOTSUPP;
}
i = find_new_socket();
if (i >= 0) {
#ifdef IPV6
fd = socket(PF_INET6, type, 0);
#else
fd = socket(PF_INET, type, 0);
#endif
if (fd == INVALID_SOCKET) {
socket_perror("socket_create: socket", 0);
return EESOCKET;
}
optval = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &optval,
sizeof(optval)) == -1) {
socket_perror("socket_create: setsockopt", 0);
OS_socket_close(fd);
return EESETSOCKOPT;
}
if (set_socket_nonblocking(fd, 1) == -1) {
socket_perror("socket_create: set_socket_nonblocking", 0);
OS_socket_close(fd);
return EENONBLOCK;
}
lpc_socks[i].fd = fd;
lpc_socks[i].flags = S_HEADER;
if (type == SOCK_DGRAM) close_callback = 0;
set_read_callback(i, read_callback);
set_write_callback(i, 0);
set_close_callback(i, close_callback);
#ifndef NO_BUFFER_TYPE
if (binary) {
lpc_socks[i].flags |= S_BINARY;
}
#endif
lpc_socks[i].mode = mode;
lpc_socks[i].state = STATE_UNBOUND;
memset((char *) &lpc_socks[i].l_addr, 0, sizeof(lpc_socks[i].l_addr));
memset((char *) &lpc_socks[i].r_addr, 0, sizeof(lpc_socks[i].r_addr));
lpc_socks[i].owner_ob = current_object;
lpc_socks[i].release_ob = NULL;
lpc_socks[i].r_buf = NULL;
lpc_socks[i].r_off = 0;
lpc_socks[i].r_len = 0;
lpc_socks[i].w_buf = NULL;
lpc_socks[i].w_off = 0;
lpc_socks[i].w_len = 0;
current_object->flags |= O_EFUN_SOCKET;
debug(sockets, ("socket_create: created socket %d mode %d fd %d\n",
i, mode, fd));
}
return i;
}
/*
* Bind an address to an LPC efun socket
*/
int socket_bind (int fd, int port, const char * addr)
{
socklen_t len;
#ifdef IPV6
struct sockaddr_in6 sin;
#else
struct sockaddr_in sin;
#endif
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].state != STATE_UNBOUND)
return EEISBOUND;
#ifdef IPV6
sin.sin6_family = AF_INET6;
#else
sin.sin_family = AF_INET;
#endif
if (!addr) {
if (MUD_IP[0])
#ifdef IPV6
inet_pton(AF_INET6, MUD_IP, &(sin.sin6_addr));
else
sin.sin6_addr = in6addr_any;
sin.sin6_port = htons((u_short) port);
#else
sin.sin_addr.s_addr = inet_addr(MUD_IP);
else
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons((u_short) port);
#endif
} else {
if (!socket_name_to_sin(addr, &sin))
return EEBADADDR;
}
if (bind(lpc_socks[fd].fd, (struct sockaddr *) & sin, sizeof(sin)) == -1) {
switch (socket_errno) {
case EADDRINUSE:
return EEADDRINUSE;
default:
socket_perror("socket_bind: bind", 0);
return EEBIND;
}
}
len = sizeof(sin);
if (getsockname(lpc_socks[fd].fd, (struct sockaddr *) & lpc_socks[fd].l_addr, &len) == -1) {
socket_perror("socket_bind: getsockname", 0);
return EEGETSOCKNAME;
}
lpc_socks[fd].state = STATE_BOUND;
#ifdef IPV6
char tmp[INET6_ADDRSTRLEN];
debug(sockets, ("socket_bind: bound socket %d to %s.%d\n",
fd, inet_ntop(AF_INET6, &lpc_socks[fd].l_addr.sin6_addr, &tmp, INET6_ADDRSTRLEN),
ntohs(lpc_socks[fd].l_addr.sin6_port)));
#else
debug(sockets, ("socket_bind: bound socket %d to %s.%d\n",
fd, inet_ntoa(lpc_socks[fd].l_addr.sin_addr),
ntohs(lpc_socks[fd].l_addr.sin_port)));
#endif
return EESUCCESS;
}
/*
* Listen for connections on an LPC efun socket
*/
int socket_listen (int fd, svalue_t * callback)
{
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].mode == DATAGRAM)
return EEMODENOTSUPP;
if (lpc_socks[fd].state == STATE_UNBOUND)
return EENOADDR;
if (lpc_socks[fd].state != STATE_BOUND)
return EEISCONN;
if (listen(lpc_socks[fd].fd, 5) == -1) {
socket_perror("socket_listen: listen", 0);
return EELISTEN;
}
lpc_socks[fd].state = STATE_LISTEN;
set_read_callback(fd, callback);
current_object->flags |= O_EFUN_SOCKET;
debug(sockets, ("socket_listen: listen on socket %d\n", fd));
return EESUCCESS;
}
/*
* Accept a connection on an LPC efun socket
*/
int socket_accept (int fd, svalue_t * read_callback, svalue_t * write_callback)
{
int accept_fd, i;
socklen_t len;
#ifdef IPV6
struct sockaddr_in6 sin;
#else
struct sockaddr_in sin;
#endif
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].mode == DATAGRAM)
return EEMODENOTSUPP;
if (lpc_socks[fd].state != STATE_LISTEN)
return EENOTLISTN;
lpc_socks[fd].flags &= ~S_WACCEPT;
len = sizeof(sin);
accept_fd = accept(lpc_socks[fd].fd, (struct sockaddr *) & sin, &len);
if (accept_fd == -1) {
switch (socket_errno) {
#ifdef EWOULDBLOCK
case EWOULDBLOCK:
return EEWOULDBLOCK;
#endif
case EINTR:
return EEINTR;
default:
socket_perror("socket_accept: accept", 0);
return EEACCEPT;
}
}
/*
* according to Amylaar, 'accepted' sockets in Linux 0.99p6 don't
* properly inherit the nonblocking property from the listening socket.
* Marius, 19-Jun-2000: this happens on other platforms as well, so just
* do it for everyone
*/
if (set_socket_nonblocking(accept_fd, 1) == -1) {
socket_perror("socket_accept: set_socket_nonblocking 1", 0);
OS_socket_close(accept_fd);
return EENONBLOCK;
}
i = find_new_socket();
if (i >= 0) {
fd_set wmask;
struct timeval t;
int nb;
lpc_socks[i].fd = accept_fd;
lpc_socks[i].flags = S_HEADER |
(lpc_socks[fd].flags & S_BINARY);
FD_ZERO(&wmask);
FD_SET(accept_fd, &wmask);
t.tv_sec = 0;
t.tv_usec = 0;
#ifndef hpux
nb = select(FD_SETSIZE, (fd_set *) 0, &wmask, (fd_set *) 0, &t);
#else
nb = select(FD_SETSIZE, (int *) 0, (int *) &wmask, (int *) 0, &t);
#endif
//if (!(FD_ISSET(accept_fd, &wmask)))
lpc_socks[i].flags |= S_BLOCKED;
lpc_socks[i].mode = lpc_socks[fd].mode;
lpc_socks[i].state = STATE_DATA_XFER;
len = sizeof(sin);
if (getsockname(lpc_socks[i].fd, (struct sockaddr *)&lpc_socks[i].l_addr, &len) == -1) {
lpc_socks[i].l_addr = lpc_socks[fd].l_addr;
}
lpc_socks[i].r_addr = sin;
lpc_socks[i].owner_ob = NULL;
lpc_socks[i].release_ob = NULL;
lpc_socks[i].r_buf = NULL;
lpc_socks[i].r_off = 0;
lpc_socks[i].r_len = 0;
lpc_socks[i].w_buf = NULL;
lpc_socks[i].w_off = 0;
lpc_socks[i].w_len = 0;
lpc_socks[i].owner_ob = current_object;
set_read_callback(i, read_callback);
set_write_callback(i, write_callback);
copy_close_callback(i, fd);
current_object->flags |= O_EFUN_SOCKET;
debug(sockets, ("socket_accept: accept on socket %d\n", fd));
debug(sockets, ("socket_accept: new socket %d on fd %d\n", i, accept_fd));
} else
OS_socket_close(accept_fd);
return i;
}
/*
* Connect an LPC efun socket
*/
int socket_connect (int fd, const char * name, svalue_t * read_callback, svalue_t * write_callback)
{
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].mode == DATAGRAM)
return EEMODENOTSUPP;
switch (lpc_socks[fd].state) {
case STATE_CLOSED:
case STATE_FLUSHING:
case STATE_UNBOUND:
case STATE_BOUND:
break;
case STATE_LISTEN:
return EEISLISTEN;
case STATE_DATA_XFER:
return EEISCONN;
}
if (!socket_name_to_sin(name, &lpc_socks[fd].r_addr))
return EEBADADDR;
set_read_callback(fd, read_callback);
set_write_callback(fd, write_callback);
current_object->flags |= O_EFUN_SOCKET;
#ifdef WINSOCK
/* Turn on blocking for connect to ensure correct errors */
if (set_socket_nonblocking(lpc_socks[fd].fd, 0) == -1) {
socket_perror("socket_connect: set_socket_nonblocking 0", 0);
OS_socket_close(fd);
return EENONBLOCK;
}
#endif
if (connect(lpc_socks[fd].fd, (struct sockaddr *) & lpc_socks[fd].r_addr,
#ifdef IPV6
sizeof(struct sockaddr_in6)) == -1) {
#else
sizeof(struct sockaddr_in)) == -1) {
#endif
switch (socket_errno) {
case EINTR:
return EEINTR;
case EADDRINUSE:
return EEADDRINUSE;
case EALREADY:
return EEALREADY;
case ECONNREFUSED:
return EECONNREFUSED;
case EINPROGRESS:
break;
default:
socket_perror("socket_connect: connect", 0);
return EECONNECT;
}
}
#ifdef WINSOCK
if (set_socket_nonblocking(lpc_socks[fd].fd, 1) == -1) {
socket_perror("socket_connect: set_socket_nonblocking 1", 0);
OS_socket_close(fd);
return EENONBLOCK;
}
#endif
lpc_socks[fd].state = STATE_DATA_XFER;
lpc_socks[fd].flags |= S_BLOCKED;
return EESUCCESS;
}
/*
* Write a message on an LPC efun socket
*/
int socket_write (int fd, svalue_t * message, const char * name)
{
int len, off;
char *buf, *p;
#ifdef IPV6
struct sockaddr_in6 sin;
#else
struct sockaddr_in sin;
#endif
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].mode == DATAGRAM) {
if (name == NULL)
return EENOADDR;
if (!socket_name_to_sin(name, &sin))
return EEBADADDR;
} else {
if (lpc_socks[fd].state != STATE_DATA_XFER)
return EENOTCONN;
if (name != NULL)
return EEBADADDR;
if (lpc_socks[fd].flags & S_BLOCKED)
return EEALREADY;
}
switch (lpc_socks[fd].mode) {
case MUD:
switch (message->type) {
case T_OBJECT:
return EETYPENOTSUPP;
default:
save_svalue_depth = 0;
len = svalue_save_size(message);
if (save_svalue_depth > MAX_SAVE_SVALUE_DEPTH) {
return EEBADDATA;
}
buf = (char *)
DMALLOC(len + 5, TAG_TEMPORARY, "socket_write: default");
if (buf == NULL)
fatal("Out of memory");
*(INT_32 *) buf = htonl((long) len);
len += 4;
buf[4] = '\0';
p = buf + 4;
save_svalue(message, &p);
break;
}
break;
case STREAM:
switch (message->type) {
#ifndef NO_BUFFER_TYPE
case T_BUFFER:
len = message->u.buf->size;
buf = (char *) DMALLOC(len, TAG_TEMPORARY, "socket_write: T_BUFFER");
if (buf == NULL)
fatal("Out of memory");
memcpy(buf, message->u.buf->item, len);
break;
#endif
case T_STRING:
len = SVALUE_STRLEN(message);
buf = (char *) DMALLOC(len + 1, TAG_TEMPORARY, "socket_write: T_STRING");
if (buf == NULL)
fatal("Out of memory");
strcpy(buf, message->u.string);
break;
case T_ARRAY:
{
int i, limit;
svalue_t *el;
len = message->u.arr->size * sizeof(int);
buf = (char *) DMALLOC(len + 1, TAG_TEMPORARY, "socket_write: T_ARRAY");
if (buf == NULL)
fatal("Out of memory");
el = message->u.arr->item;
limit = len / sizeof(int);
for (i = 0; i < limit; i++) {
switch (el[i].type) {
case T_NUMBER:
memcpy((char *) &buf[i * sizeof(int)],
(char *) &el[i].u.number, sizeof(int));
break;
case T_REAL:
memcpy((char *) &buf[i * sizeof(int)], (char *) &el[i].u.real,
sizeof(int));
break;
default:
break;
}
}
break;
}
default:
return EETYPENOTSUPP;
}
break;
case DATAGRAM:
switch (message->type) {
case T_STRING:
if ((off = sendto(lpc_socks[fd].fd, (char *)message->u.string,
strlen(message->u.string) + 1, 0,
(struct sockaddr *) & sin, sizeof(sin))) == -1) {
//socket_perror("socket_write: sendto", 0);
return EESENDTO;
}
break;
#ifndef NO_BUFFER_TYPE
case T_BUFFER:
if ((off = sendto(lpc_socks[fd].fd, (char *)message->u.buf->item,
message->u.buf->size, 0,
(struct sockaddr *) & sin, sizeof(sin))) == -1) {
//socket_perror("socket_write: sendto", 0);
return EESENDTO;
}
break;
#endif
default:
return EETYPENOTSUPP;
}
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_out_packets++;
inet_out_volume += off;
inet_socket_out_packets++;
inet_socket_out_volume += off;
}
#endif
return EESUCCESS;
default:
return EEMODENOTSUPP;
}
if (!len) {
FREE(buf);
return EESUCCESS;
}
off = OS_socket_write(lpc_socks[fd].fd, buf, len);
if (off <= 0) {
FREE(buf);
#ifdef EWOULDBLOCK
if (off == -1 && socket_errno == EWOULDBLOCK)
return EEWOULDBLOCK;
#endif
if (off == -1 && socket_errno == EINTR)
return EEINTR;
//socket_perror("socket_write: send", 0);
lpc_socks[fd].flags |= S_LINKDEAD;
socket_close(fd, SC_FORCE | SC_DO_CALLBACK | SC_FINAL_CLOSE);
return EESEND;
}
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_out_packets++;
inet_out_volume += off;
inet_socket_out_packets++;
inet_socket_out_volume += off;
}
#endif
if (off < len) {
lpc_socks[fd].flags |= S_BLOCKED;
lpc_socks[fd].w_buf = buf;
lpc_socks[fd].w_off = off;
lpc_socks[fd].w_len = len - off;
return EECALLBACK;
}
FREE(buf);
return EESUCCESS;
}
#endif /* PACKAGE_SOCKETS */
static void call_callback (int fd, int what, int num_arg)
{
union string_or_func callback;
switch (what) {
case S_READ_FP: callback = lpc_socks[fd].read_callback; break;
case S_WRITE_FP: callback = lpc_socks[fd].write_callback; break;
case S_CLOSE_FP: callback = lpc_socks[fd].close_callback; break;
}
if (lpc_socks[fd].flags & what) {
safe_call_function_pointer(callback.f, num_arg);
} else if (callback.s) {
if (callback.s[0] == APPLY___INIT_SPECIAL_CHAR)
error("Illegal function name.\n");
safe_apply(callback.s, lpc_socks[fd].owner_ob, num_arg, ORIGIN_INTERNAL);
}
}
/*
* Handle LPC efun socket read select events
*/
void socket_read_select_handler (int fd)
{
int cc = 0;
socklen_t addrlen;
char buf[BUF_SIZE], addr[ADDR_BUF_SIZE];
svalue_t value;
#ifdef IPV6
struct sockaddr_in6 sin;
#else
struct sockaddr_in sin;
#endif
debug(sockets, ("read_socket_handler: fd %d state %d\n",
fd, lpc_socks[fd].state));
switch (lpc_socks[fd].state) {
case STATE_CLOSED:
case STATE_FLUSHING:
return;
case STATE_UNBOUND:
debug_message("socket_read_select_handler: read on unbound socket %i\n", fd);
break;
case STATE_BOUND:
switch (lpc_socks[fd].mode) {
case MUD:
case STREAM:
break;
case DATAGRAM:
debug(sockets, ("read_socket_handler: DATA_XFER DATAGRAM\n"));
addrlen = sizeof(sin);
cc = recvfrom(lpc_socks[fd].fd, buf, sizeof(buf) - 1, 0,
(struct sockaddr *) & sin, &addrlen);
if (cc <= 0)
break;
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_in_packets++;
inet_in_volume += cc;
inet_socket_in_packets++;
inet_socket_in_volume++;
}
#endif
debug(sockets, ("read_socket_handler: read %d bytes\n", cc));
buf[cc] = '\0';
#ifdef IPV6
char tmp[INET6_ADDRSTRLEN];
sprintf(addr, "%s %d", inet_ntop(AF_INET6, &sin.sin6_addr, tmp, INET6_ADDRSTRLEN),
ntohs(sin.sin6_port));
#else
sprintf(addr, "%s %d", inet_ntoa(sin.sin_addr),
ntohs(sin.sin_port));
#endif
push_number(fd);
#ifndef NO_BUFFER_TYPE
if (lpc_socks[fd].flags & S_BINARY) {
buffer_t *b;
b = allocate_buffer(cc);
if (b) {
memcpy(b->item, buf, cc);
push_refed_buffer(b);
} else {
push_number(0);
}
} else {
#endif
copy_and_push_string(buf);
#ifndef NO_BUFFER_TYPE
}
#endif
copy_and_push_string(addr);
debug(sockets, ("read_socket_handler: apply\n"));
call_callback(fd, S_READ_FP, 3);
return;
case STREAM_BINARY:
case DATAGRAM_BINARY:
;
}
break;
case STATE_LISTEN:
debug(sockets, ("read_socket_handler: apply read callback\n"));
lpc_socks[fd].flags |= S_WACCEPT;
push_number(fd);
call_callback(fd, S_READ_FP, 1);
return;
case STATE_DATA_XFER:
switch (lpc_socks[fd].mode) {
case DATAGRAM:
break;
case MUD:
debug(sockets, ("read_socket_handler: DATA_XFER MUD\n"));
if (lpc_socks[fd].flags & S_HEADER) {
cc = OS_socket_read(lpc_socks[fd].fd, (char *) &lpc_socks[fd].r_len +
lpc_socks[fd].r_off, 4 - lpc_socks[fd].r_off);
if (cc <= 0)
break;
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_in_packets++;
inet_in_volume += cc;
inet_socket_in_packets++;
inet_socket_in_volume += cc;
}
#endif
debug(sockets, ("read_socket_handler: read %d bytes\n", cc));
lpc_socks[fd].r_off += cc;
if (lpc_socks[fd].r_off != 4)
return;
debug(sockets, ("read_socket_handler: read header\n"));
lpc_socks[fd].flags &= ~S_HEADER;
lpc_socks[fd].r_off = 0;
lpc_socks[fd].r_len = ntohl(lpc_socks[fd].r_len);
if (lpc_socks[fd].r_len <= 0 || lpc_socks[fd].r_len > MAX_BYTE_TRANSFER)
break;
lpc_socks[fd].r_buf = (char *)
DMALLOC(lpc_socks[fd].r_len + 1, TAG_TEMPORARY, "socket_read_select_handler");
if (lpc_socks[fd].r_buf == NULL)
fatal("Out of memory");
debug(sockets, ("read_socket_handler: svalue len is %lu\n",
lpc_socks[fd].r_len));
}
if (lpc_socks[fd].r_off < lpc_socks[fd].r_len) {
cc = OS_socket_read(lpc_socks[fd].fd, lpc_socks[fd].r_buf +
lpc_socks[fd].r_off, lpc_socks[fd].r_len -
lpc_socks[fd].r_off);
if (cc <= 0)
break;
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_in_packets++;
inet_in_volume += cc;
inet_socket_in_packets++;
inet_socket_in_volume += cc;
}
#endif
debug(sockets, ("read_socket_handler: read %d bytes\n", cc));
lpc_socks[fd].r_off += cc;
if (lpc_socks[fd].r_off != lpc_socks[fd].r_len)
return;
debug(sockets, ("read_socket_handler: read svalue\n"));
}
lpc_socks[fd].r_buf[lpc_socks[fd].r_len] = '\0';
value = const0;
push_number(fd);
if (restore_svalue(lpc_socks[fd].r_buf, &value) == 0) {
STACK_INC;
*sp = value;
} else {
push_undefined();
}
FREE(lpc_socks[fd].r_buf);
lpc_socks[fd].flags |= S_HEADER;
lpc_socks[fd].r_buf = NULL;
lpc_socks[fd].r_off = 0;
lpc_socks[fd].r_len = 0;
debug(sockets, ("read_socket_handler: apply read callback\n"));
call_callback(fd, S_READ_FP, 2);
return;
case STREAM:
debug(sockets, ("read_socket_handler: DATA_XFER STREAM\n"));
cc = OS_socket_read(lpc_socks[fd].fd, buf, sizeof(buf) - 1);
if (cc <= 0)
break;
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_in_packets++;
inet_in_volume += cc;
inet_socket_in_packets++;
inet_socket_in_volume += cc;
}
#endif
debug(sockets, ("read_socket_handler: read %d bytes\n", cc));
buf[cc] = '\0';
push_number(fd);
#ifndef NO_BUFFER_TYPE
if (lpc_socks[fd].flags & S_BINARY) {
buffer_t *b;
b = allocate_buffer(cc);
if (b) {
b->ref--;
memcpy(b->item, buf, cc);
push_buffer(b);
} else {
push_number(0);
}
} else {
#endif
copy_and_push_string(buf);
#ifndef NO_BUFFER_TYPE
}
#endif
debug(sockets, ("read_socket_handler: apply read callback\n"));
call_callback(fd, S_READ_FP, 2);
return;
case STREAM_BINARY:
case DATAGRAM_BINARY:
;
}
break;
}
if (cc == -1) {
switch (socket_errno) {
case ECONNREFUSED:
/* Evidentally, on Linux 1.2.1, ECONNREFUSED gets returned
* if an ICMP_PORT_UNREACHED error happens internally. Why
* they use this error message, I have no idea, but this seems
* to work.
*/
if (lpc_socks[fd].state == STATE_BOUND
&& lpc_socks[fd].mode == DATAGRAM)
return;
break;
case EINTR:
#ifdef EWOULDBLOCK
case EWOULDBLOCK:
return;
#endif
default:
break;
}
}
lpc_socks[fd].flags |= S_LINKDEAD;
socket_close(fd, SC_FORCE | SC_DO_CALLBACK | SC_FINAL_CLOSE);
}
/*
* Handle LPC efun socket write select events
*/
void socket_write_select_handler (int fd)
{
int cc;
debug(sockets, ("write_socket_handler: fd %d state %d\n",
fd, lpc_socks[fd].state));
/* if the socket isn't blocked, we've got nothing to send */
/* if the socket is linkdead, don't send -- could block */
if (!(lpc_socks[fd].flags & S_BLOCKED) || lpc_socks[fd].flags & S_LINKDEAD)
return;
if (lpc_socks[fd].w_buf != NULL) {
cc = OS_socket_write(lpc_socks[fd].fd,
lpc_socks[fd].w_buf + lpc_socks[fd].w_off,
lpc_socks[fd].w_len);
if (cc <= -1) {
if (cc == -1 && (
#ifdef EWOULDBLOCK
errno == EWOULDBLOCK ||
#endif
errno == EINTR)) {
return;
}
lpc_socks[fd].flags |= S_LINKDEAD;
if (lpc_socks[fd].state == STATE_FLUSHING) {
lpc_socks[fd].flags &= ~S_BLOCKED;
socket_close(fd, SC_FORCE | SC_FINAL_CLOSE);
return;
}
socket_close(fd, SC_FORCE | SC_DO_CALLBACK | SC_FINAL_CLOSE);
return;
}
#ifdef F_NETWORK_STATS
if (!(lpc_socks[fd].flags & S_EXTERNAL)) {
inet_out_packets++;
inet_out_volume += cc;
inet_socket_out_packets++;
inet_socket_out_volume += cc;
}
#endif
lpc_socks[fd].w_off += cc;
lpc_socks[fd].w_len -= cc;
if (lpc_socks[fd].w_len != 0)
return;
FREE(lpc_socks[fd].w_buf);
lpc_socks[fd].w_buf = NULL;
lpc_socks[fd].w_off = 0;
}
lpc_socks[fd].flags &= ~S_BLOCKED;
if (lpc_socks[fd].state == STATE_FLUSHING) {
socket_close(fd, SC_FORCE | SC_FINAL_CLOSE);
return;
}
debug(sockets, ("write_socket_handler: apply write_callback\n"));
push_number(fd);
call_callback(fd, S_WRITE_FP, 1);
}
/*
* Close an LPC efun socket
*/
int socket_close (int fd, int flags)
{
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED)
return EEBADF;
if (lpc_socks[fd].state == STATE_FLUSHING && !(flags & SC_FINAL_CLOSE))
return EEBADF;
if (!(flags & SC_FORCE) && lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (flags & SC_DO_CALLBACK) {
debug(sockets, ("read_socket_handler: apply close callback\n"));
push_number(fd);
call_callback(fd, S_CLOSE_FP, 1);
}
set_read_callback(fd, 0);
set_write_callback(fd, 0);
set_close_callback(fd, 0);
/* if we're linkdead, we'll never flush, so don't even try :-) */
if ((lpc_socks[fd].flags & S_BLOCKED) && !(lpc_socks[fd].flags & S_LINKDEAD)) {
/* Can't close now; we still have data to write. Tell the mudlib
* it is closed, but we really finish up later.
*/
lpc_socks[fd].state = STATE_FLUSHING;
return EESUCCESS;
}
while (OS_socket_close(lpc_socks[fd].fd) == -1 && socket_errno == EINTR)
; /* empty while */
if (lpc_socks[fd].r_buf != NULL)
FREE(lpc_socks[fd].r_buf);
if (lpc_socks[fd].w_buf != NULL)
FREE(lpc_socks[fd].w_buf);
clear_socket(fd, 1);
debug(sockets, ("socket_close: closed fd %d\n", fd));
return EESUCCESS;
}
#ifdef PACKAGE_SOCKETS
/*
* Release an LPC efun socket to another object
*/
int socket_release (int fd, object_t * ob, svalue_t * callback)
{
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if (lpc_socks[fd].owner_ob != current_object)
return EESECURITY;
if (lpc_socks[fd].flags & S_RELEASE)
return EESOCKRLSD;
lpc_socks[fd].flags |= S_RELEASE;
lpc_socks[fd].release_ob = ob;
push_number(fd);
push_object(ob);
if (callback->type == T_FUNCTION)
safe_call_function_pointer(callback->u.fp, 2);
else
safe_apply(callback->u.string, ob, 2, ORIGIN_INTERNAL);
if ((lpc_socks[fd].flags & S_RELEASE) == 0)
return EESUCCESS;
lpc_socks[fd].flags &= ~S_RELEASE;
lpc_socks[fd].release_ob = NULL;
return EESOCKNOTRLSD;
}
/*
* Aquire an LPC efun socket from another object
*/
int socket_acquire (int fd, svalue_t * read_callback, svalue_t * write_callback, svalue_t * close_callback)
{
if (fd < 0 || fd >= max_lpc_socks)
return EEFDRANGE;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return EEBADF;
if ((lpc_socks[fd].flags & S_RELEASE) == 0)
return EESOCKNOTRLSD;
if (lpc_socks[fd].release_ob != current_object)
return EESECURITY;
lpc_socks[fd].flags &= ~S_RELEASE;
lpc_socks[fd].owner_ob = current_object;
lpc_socks[fd].release_ob = NULL;
set_read_callback(fd, read_callback);
set_write_callback(fd, write_callback);
set_close_callback(fd, close_callback);
return EESUCCESS;
}
/*
* Return the string representation of a socket error
*/
const char *socket_error (int error)
{
error = -(error + 1);
if (error < 0 || error >= ERROR_STRINGS - 1)
return "socket_error: invalid error number";
return error_strings[error];
}
/*
* Return the remote address for an LPC efun socket
*/
int get_socket_address (int fd, char * addr, int * port, int local)
{
#ifdef IPV6
struct sockaddr_in6 *addr_in;
#else
struct sockaddr_in *addr_in;
#endif
if (fd < 0 || fd >= max_lpc_socks) {
addr[0] = '\0';
*port = 0;
return EEFDRANGE;
}
addr_in = (local ? &lpc_socks[fd].l_addr : &lpc_socks[fd].r_addr);
#ifdef IPV6
*port = ntohs(addr_in->sin6_port);
inet_ntop(AF_INET6, &addr_in->sin6_addr, addr, INET6_ADDRSTRLEN);
#else
*port = ntohs(addr_in->sin_port);
strcpy(addr, inet_ntoa(addr_in->sin_addr));
#endif
return EESUCCESS;
}
/*
* Return the current socket owner
*/
object_t *get_socket_owner (int fd)
{
if (fd < 0 || fd >= max_lpc_socks)
return (object_t *) NULL;
if (lpc_socks[fd].state == STATE_CLOSED ||
lpc_socks[fd].state == STATE_FLUSHING)
return (object_t *) NULL;
return lpc_socks[fd].owner_ob;
}
#endif /* PACKAGE_SOCKETS */
/*
* Initialize a T_OBJECT svalue
*/
void assign_socket_owner (svalue_t * sv, object_t * ob)
{
if (ob != NULL) {
sv->type = T_OBJECT;
sv->u.ob = ob;
add_ref(ob, "assign_socket_owner");
} else
assign_svalue_no_free(sv, &const0u);
}
#ifdef PACKAGE_SOCKETS
/*
* Convert a string representation of an address to a sockaddr_in
*/
#ifdef IPV6
static int socket_name_to_sin (const char * name, struct sockaddr_in6 * sin)
#else
static int socket_name_to_sin (const char * name, struct sockaddr_in * sin)
#endif
{
int port;
char *cp, addr[ADDR_BUF_SIZE];
strncpy(addr, name, ADDR_BUF_SIZE);
addr[ADDR_BUF_SIZE - 1] = '\0';
cp = strchr(addr, ' ');
if (cp == NULL)
return 0;
*cp = '\0';
port = atoi(cp + 1);
#ifdef IPV6
sin->sin6_family = AF_INET6;
struct addrinfo hints, *res;
hints.ai_family = AF_INET6;
hints.ai_socktype = 0;
hints.ai_protocol = 0;
hints.ai_flags = AI_CANONNAME| AI_V4MAPPED;
if(getaddrinfo(addr, "1234", &hints, &res)){
//failed
socket_perror("socket_name_to_sin: getaddrinfo", 0);
return 0;
}
struct sockaddr_in6 tmp;
memcpy(&tmp, res->ai_addr, sizeof(tmp));
freeaddrinfo(res);
sin->sin6_addr = tmp.sin6_addr;
sin->sin6_port = htons((u_short) port);
#else
sin->sin_family = AF_INET;
sin->sin_port = htons((u_short) port);
sin->sin_addr.s_addr = inet_addr(addr);
#endif
return 1;
}
#endif /* PACKAGE_SOCKETS */
/*
* Close any sockets owned by ob
*/
void close_referencing_sockets (object_t * ob)
{
int i;
for (i = 0; i < max_lpc_socks; i++)
if (lpc_socks[i].owner_ob == ob &&
lpc_socks[i].state != STATE_CLOSED &&
lpc_socks[i].state != STATE_FLUSHING)
socket_close(i, SC_FORCE);
}
#ifdef PACKAGE_SOCKETS
/*
* Return the string representation of a sockaddr_in
*/
#ifdef IPV6
static char *inet_address (struct sockaddr_in6 * sin)
#else
static char *inet_address (struct sockaddr_in * sin)
#endif
{
#ifdef IPV6
static char addr[INET6_ADDRSTRLEN], port[7];
if (!memcmp(&sin->sin6_addr, &in6addr_any, sizeof(in6addr_any)))
strcpy(addr, "*");
else
inet_ntop(AF_INET6, &sin->sin6_addr, addr, INET6_ADDRSTRLEN);
strcat(addr, ".");
if (ntohs(sin->sin6_port) == 0)
strcpy(port, "*");
else
sprintf(port, "%d", ntohs(sin->sin6_port));
strcat(addr, port);
#else
static char addr[32], port[7];
if (ntohl(sin->sin_addr.s_addr) == INADDR_ANY)
strcpy(addr, "*");
else
strcpy(addr, inet_ntoa(sin->sin_addr));
strcat(addr, ".");
if (ntohs(sin->sin_port) == 0)
strcpy(port, "*");
else
sprintf(port, "%d", ntohs(sin->sin_port));
strcat(addr, port);
#endif
return (addr);
}
const char *socket_modes[] = {
"MUD",
"STREAM",
"DATAGRAM",
"STREAM_BINARY",
"DATAGRAM_BINARY"
};
const char *socket_states[] = {
"CLOSED",
"CLOSING",
"UNBOUND",
"BOUND",
"LISTEN",
"DATA_XFER"
};
/*
* Return an array containing info for a socket
*/
array_t *socket_status (int which)
{
array_t *ret;
if (which < 0 || which >= max_lpc_socks) return 0;
ret = allocate_empty_array(6);
ret->item[0].type = T_NUMBER;
ret->item[0].subtype = 0;
ret->item[0].u.number = lpc_socks[which].fd;
ret->item[1].type = T_STRING;
ret->item[1].subtype = STRING_CONSTANT;
ret->item[1].u.string = socket_states[lpc_socks[which].state];
ret->item[2].type = T_STRING;
ret->item[2].subtype = STRING_CONSTANT;
ret->item[2].u.string = socket_modes[lpc_socks[which].mode];
ret->item[3].type = T_STRING;
ret->item[3].subtype = STRING_MALLOC;
ret->item[3].u.string = string_copy(inet_address(&lpc_socks[which].l_addr),
"socket_status");
ret->item[4].type = T_STRING;
ret->item[4].subtype = STRING_MALLOC;
ret->item[4].u.string = string_copy(inet_address(&lpc_socks[which].r_addr),
"socket_status");
if (lpc_socks[which].owner_ob && !(lpc_socks[which].owner_ob->flags & O_DESTRUCTED)) {
ret->item[5].type = T_OBJECT;
ret->item[5].u.ob = lpc_socks[which].owner_ob;
add_ref(lpc_socks[which].owner_ob, "socket_status");
} else {
ret->item[5] = const0u;
}
return ret;
}
#endif /* PACKAGE_SOCKETS */
#endif /* SOCKET_EFUNS */
