void
accept_connection()
{
struct sockaddr_in peer;
struct sockaddr_in me;
int fd;
if ((fd = comm_accept(theHttpConnection, &peer, &me)) < 0) {
char err[200];
if (errno == EMFILE) {
sprintf(err, "SDKtest_server: accept_connection accept failure (current fd limit = %d)", fd_limit);
} else {
sprintf(err, "SDKtest_server: accept_connection accept failure");
}
perror(err);
return;
}
if (fd >= max_users) {
fprintf(stderr, "Error : too many simultaneous connections. \n");
printf("Error : too many simultaneous connections. \n");
exit(-1);
}
BIGGEST_FD = max(BIGGEST_FD, fd);
fd_table[fd].state = READABLE;
fd_table[fd].read_offset = 0;
fd_table[fd].keepalive = 0;
fd_table[fd].keepalive_requests = 0;
fd_table[fd].inbufptr = fd_table[fd].inbuf;
}
static void
accept_connection(int pfd, void *data)
{
static time_t last_oper_notice = 0;
struct irc_sockaddr_storage sai;
socklen_t addrlen = sizeof(sai);
int fd;
struct Listener *listener = data;
struct ConfItem *aconf;
char buf[BUFSIZE];
s_assert(listener != NULL);
if(listener == NULL)
return;
for(;;) /* loop until something breaks us out */
{
/*
* There may be many reasons for error return, but
* in otherwise correctly working environment the
* probable cause is running out of file descriptors
* (EMFILE, ENFILE or others?). The man pages for
* accept don't seem to list these as possible,
* although it's obvious that it may happen here.
* Thus no specific errors are tested at this
* point, just assume that connections cannot
* be accepted until some old is closed first.
*/
fd = comm_accept(listener->fd, (struct sockaddr *) &sai, &addrlen);
/* This needs to be done here, otherwise we break dlines */
mangle_mapped_sockaddr((struct sockaddr *) &sai);
if(fd < 0)
{
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE,
COMM_SELECT_READ, accept_connection, listener);
return;
}
/*
* check for connection limit
*/
if((maxconnections - 10) < fd)
{
++ServerStats->is_ref;
/*
* slow down the whining to opers bit
*/
if((last_oper_notice + 20) <= CurrentTime)
{
sendto_realops_flags(UMODE_ALL, L_ALL,
"All connections in use. (%s)",
get_listener_name(listener));
last_oper_notice = CurrentTime;
}
write(fd, "ERROR :All connections in use\r\n", 32);
comm_close(fd);
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE,
COMM_SELECT_READ, accept_connection, listener);
return;
}
/* Do an initial check we aren't connecting too fast or with too many
* from this IP... */
if((aconf = conf_connect_allowed((struct sockaddr *) &sai, sai.ss_family)) != NULL)
{
ServerStats->is_ref++;
if(ConfigFileEntry.dline_with_reason)
{
if(ircsnprintf
(buf, sizeof(buf), "ERROR :*** Banned: %s\r\n",
aconf->passwd) >= (sizeof(buf) - 1))
{
buf[sizeof(buf) - 3] = '\r';
buf[sizeof(buf) - 2] = '\n';
buf[sizeof(buf) - 1] = '\0';
}
}
else
ircsprintf(buf, "ERROR :You have been D-lined.\r\n");
write(fd, buf, strlen(buf));
comm_close(fd);
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE,
COMM_SELECT_READ, accept_connection, listener);
return;
}
ServerStats->is_ac++;
add_connection(listener, fd, (struct sockaddr *) &sai);
}
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE, COMM_SELECT_READ,
accept_connection, listener);
}
static void
accept_connection(int pfd, void *data)
{
static time_t last_oper_notice = 0;
struct irc_sockaddr sai;
struct irc_inaddr addr;
int fd;
int pe;
struct Listener * listener = data;
assert(listener != NULL);
if(listener == NULL)
return;
/*
* There may be many reasons for error return, but
* in otherwise correctly working environment the
* probable cause is running out of file descriptors
* (EMFILE, ENFILE or others?). The man pages for
* accept don't seem to list these as possible,
* although it's obvious that it may happen here.
* Thus no specific errors are tested at this
* point, just assume that connections cannot
* be accepted until some old is closed first.
*/
fd = comm_accept(listener->fd, &sai);
copy_s_addr(IN_ADDR(addr), S_ADDR(sai));
#ifdef IPV6
if((IN6_IS_ADDR_V4MAPPED(&IN_ADDR2(addr))) ||
(IN6_IS_ADDR_V4COMPAT(&IN_ADDR2(addr))))
{
memmove(&addr.sins.sin.s_addr, addr.sins.sin6.s6_addr+12,
sizeof(struct in_addr));
sai.sins.sin.sin_family = AF_INET;
}
#endif
if (fd < 0)
{
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE, COMM_SELECT_READ,
accept_connection, listener, 0);
return;
}
/*
* check for connection limit
*/
if ((MAXCONNECTIONS - 10) < fd)
{
++ServerStats->is_ref;
/*
* slow down the whining to opers bit
*/
if((last_oper_notice + 20) <= CurrentTime)
{
sendto_realops_flags(UMODE_ALL, L_ALL,"All connections in use. (%s)",
get_listener_name(listener));
last_oper_notice = CurrentTime;
}
send(fd, "ERROR :All connections in use\r\n", 32, 0);
fd_close(fd);
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE, COMM_SELECT_READ,
accept_connection, listener, 0);
return;
}
/* Do an initial check we aren't connecting too fast or with too many
* from this IP... */
if ((pe = conf_connect_allowed(&addr, sai.sins.sin.sin_family)) != 0)
{
ServerStats->is_ref++;
/* XXX - this can only be BANNED_CLIENT? */
switch (pe)
{
case BANNED_CLIENT:
send(fd, DLINE_WARNING, sizeof(DLINE_WARNING)-1, 0);
break;
}
fd_close(fd);
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE, COMM_SELECT_READ,
accept_connection, listener, 0);
return;
}
ServerStats->is_ac++;
add_connection(listener, fd);
/* Re-register a new IO request for the next accept .. */
comm_setselect(listener->fd, FDLIST_SERVICE, COMM_SELECT_READ,
accept_connection, listener, 0);
}