/*
* send_auth_query - send the ident server a query giving "theirport , ourport"
* The write is only attempted *once* so it is deemed to be a fail if the
* entire write doesn't write all the data given. This shouldnt be a
* problem since the socket should have a write buffer far greater than
* this message to store it in should problems arise. -avalon
*/
void send_auth_query(struct AuthRequest* auth)
{
struct sockaddr_in us;
struct sockaddr_in them;
char authbuf[32];
unsigned int count;
assert(0 != auth);
assert(0 != auth->client);
if (!os_get_sockname(cli_fd(auth->client), &us) ||
!os_get_peername(cli_fd(auth->client), &them)) {
auth_error(auth, 1);
return;
}
ircd_snprintf(0, authbuf, sizeof(authbuf), "%u , %u\r\n",
(unsigned int) ntohs(them.sin_port),
(unsigned int) ntohs(us.sin_port));
if (IO_SUCCESS == os_send_nonb(auth->fd, authbuf, strlen(authbuf), &count)) {
ClearAuthConnect(auth);
SetAuthPending(auth);
}
else
auth_error(auth, 0);
}
/*
* release_auth_client - release auth client from auth system
* this adds the client into the local client lists so it can be read by
* the main io processing loop
*/
static void release_auth_client(struct Client* client)
{
assert(0 != client);
cli_auth(client) = 0;
cli_lasttime(client) = cli_since(client) = CurrentTime;
if (cli_fd(client) > HighestFd)
HighestFd = cli_fd(client);
LocalClientArray[cli_fd(client)] = client;
add_client_to_list(client);
socket_events(&(cli_socket(client)), SOCK_ACTION_SET | SOCK_EVENT_READABLE);
Debug((DEBUG_INFO, "Auth: release_auth_client %s@%s[%s]",
cli_username(client), cli_sockhost(client), cli_sock_ip(client)));
}
static IOResult client_sendv(struct Client *cptr, struct MsgQ *buf, unsigned int *count_in, unsigned int *count_out)
{
if (cli_socket(cptr).s_ssl)
return ssl_sendv(&cli_socket(cptr), buf, count_in, count_out);
else
return os_sendv_nonb(cli_fd(cptr), buf, count_in, count_out);
}
/** Send a (prefixed) command to all servers with users on \a to.
* Skip \a from and \a one plus those indicated in \a skip.
* @param[in] from Client originating the command.
* @param[in] cmd Long name of command (ignored).
* @param[in] tok Short name of command.
* @param[in] to Destination channel.
* @param[in] one Client direction to skip (or NULL).
* @param[in] skip Bitmask of SKIP_NONOPS and SKIP_NONVOICES indicating which clients to skip.
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_channel_servers_butone(struct Client *from, const char *cmd,
const char *tok, struct Channel *to,
struct Client *one, unsigned int skip,
const char *pattern, ...)
{
struct VarData vd;
struct MsgBuf *serv_mb;
struct Membership *member;
/* build the buffer */
vd.vd_format = pattern;
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, "%:#C %s %v", from, tok, &vd);
va_end(vd.vd_args);
/* send the buffer to each server */
bump_sentalong(one);
cli_sentalong(from) = sentalong_marker;
for (member = to->members; member; member = member->next_member) {
if (MyConnect(member->user)
|| IsZombie(member)
|| cli_fd(cli_from(member->user)) < 0
|| cli_sentalong(member->user) == sentalong_marker
|| (skip & SKIP_NONOPS && !IsChanOp(member))
|| (skip & SKIP_NONHOPS && !IsChanOp(member) && !IsHalfOp(member))
|| (skip & SKIP_NONVOICES && !IsChanOp(member) && !IsHalfOp(member)&& !HasVoice(member)))
continue;
cli_sentalong(member->user) = sentalong_marker;
send_buffer(member->user, serv_mb, 0);
}
msgq_clean(serv_mb);
}
/* Helper routines */
static IOResult client_recv(struct Client *cptr, char *buf, unsigned int length, unsigned int* count_out)
{
if (cli_socket(cptr).s_ssl)
return ssl_recv(&cli_socket(cptr), buf, length, count_out);
else
return os_recv_nonb(cli_fd(cptr), buf, length, count_out);
}
IOResult os_sendv_nonb(struct Client *acptr, struct MsgQ* buf, unsigned int* count_in,
unsigned int* count_out)
{
int res;
int count;
struct iovec iov[IOV_MAX];
assert(0 != buf);
assert(0 != count_in);
assert(0 != count_out);
assert(0 != acptr);
*count_in = 0;
*count_out = 0;
errno = 0;
count = msgq_mapiov(buf, iov, IOV_MAX, count_in);
msgq_process(acptr, iov, count);
if (-1 < (res = writev(cli_fd(acptr), iov, count))) {
*count_out = (unsigned) res;
return IO_SUCCESS;
}
else if (EWOULDBLOCK == errno || EAGAIN == errno ||
ENOMEM == errno || ENOBUFS == errno)
return IO_BLOCKED;
return IO_FAILURE;
}
/** Attempt to send a sequence of bytes to the connection.
* As a side effect, updates \a cptr's FLAG_BLOCKED setting
* and sendB/sendK fields.
* @param cptr Client that should receive data.
* @param buf Message buffer to send to client.
* @return Negative on connection-fatal error; otherwise
* number of bytes sent.
*/
unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
{
unsigned int bytes_written = 0;
unsigned int bytes_count = 0;
assert(0 != cptr);
switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
case IO_SUCCESS:
ClrFlag(cptr, FLAG_BLOCKED);
cli_sendB(cptr) += bytes_written;
cli_sendB(&me) += bytes_written;
/* A partial write implies that future writes will block. */
if (bytes_written < bytes_count)
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_BLOCKED:
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_FAILURE:
cli_error(cptr) = errno;
SetFlag(cptr, FLAG_DEADSOCKET);
break;
}
return bytes_written;
}
/** Complete non-blocking connect()-sequence. Check access and
* terminate connection, if trouble detected.
* @param cptr Client to which we have connected, with all ConfItem structs attached.
* @return Zero on failure (caller should exit_client()), non-zero on success.
*/
static int completed_connection(struct Client* cptr)
{
struct ConfItem *aconf;
time_t newts;
struct Client *acptr;
int i;
assert(0 != cptr);
/*
* get the socket status from the fd first to check if
* connection actually succeeded
*/
if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
const char* msg = strerror(cli_error(cptr));
if (!msg)
msg = "Unknown error";
sendto_opmask_butone(0, SNO_OLDSNO, "Connection failed to %s: %s",
cli_name(cptr), msg);
return 0;
}
if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
sendto_opmask_butone(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
return 0;
}
if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
socket_state(&(cli_socket(cptr)), SS_CONNECTED);
if (!EmptyString(aconf->passwd))
sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
/*
* Create a unique timestamp
*/
newts = TStime();
for (i = HighestFd; i > -1; --i) {
if ((acptr = LocalClientArray[i]) &&
(IsServer(acptr) || IsHandshake(acptr))) {
if (cli_serv(acptr)->timestamp >= newts)
newts = cli_serv(acptr)->timestamp + 1;
}
}
assert(0 != cli_serv(cptr));
cli_serv(cptr)->timestamp = newts;
SetHandshake(cptr);
/*
* Make us timeout after twice the timeout for DNS look ups
*/
cli_lasttime(cptr) = CurrentTime;
ClearPingSent(cptr);
sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6n :%s",
cli_name(&me), cli_serv(&me)->timestamp, newts,
MAJOR_PROTOCOL, NumServCap(&me),
feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
return (IsDead(cptr)) ? 0 : 1;
}
/** Send a (prefixed) command to all users on this channel, except for
* \a one and those matching \a skip.
* @warning \a pattern must not contain %v.
* @param[in] from Client originating the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] to Destination channel.
* @param[in] one Client direction to skip (or NULL).
* @param[in] skip Bitmask of SKIP_NONOPS, SKIP_NONVOICES, SKIP_DEAF, SKIP_BURST, SKIP_SERVERS.
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_channel(struct Client *from, const char *cmd,
const char *tok, struct Channel *to,
struct Client *one, unsigned int skip,
const char *pattern, ...)
{
struct Membership *member;
struct VarData vd;
struct MsgBuf *user_mb;
struct MsgBuf *serv_mb;
vd.vd_format = pattern;
/* Build buffer to send to users */
va_start(vd.vd_args, pattern);
user_mb = msgq_make(0, skip & (SKIP_NONOPS | SKIP_NONVOICES) ? "%:#C %s @%v" : "%:#C %s %v",
from, cmd, &vd);
va_end(vd.vd_args);
/* Build buffer to send to servers */
if ((skip & SKIP_SERVERS) || IsLocalChannel(to->chname))
serv_mb = NULL;
else
{
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, skip & SKIP_NONOPS ? "%C %s @%v" : "%C %s %v",
from, tok, &vd);
va_end(vd.vd_args);
}
/* send buffer along! */
bump_sentalong(one);
for (member = to->members; member; member = member->next_member) {
/* skip duplicates, zombies, and flagged users... */
if (cli_sentalong(member->user) == sentalong_marker ||
IsZombie(member) ||
(skip & SKIP_DEAF && IsDeaf(member->user)) ||
#if defined(DDB) || defined(SERVICES)
(skip & SKIP_NONOPS && !IsChanOwner(member) && !IsChanOp(member)) ||
(skip & SKIP_NONVOICES && !IsChanOwner(member) && !IsChanOp(member) && !HasVoice(member)) ||
#else
(skip & SKIP_NONOPS && !IsChanOp(member)) ||
(skip & SKIP_NONVOICES && !IsChanOp(member) && !HasVoice(member)) ||
#endif
(skip & SKIP_COLOUR && !IsStripColour(member->user)) ||
(skip & SKIP_NOCOLOUR && IsStripColour(member->user)) ||
(skip & SKIP_BURST && IsBurstOrBurstAck(cli_from(member->user))) ||
!(serv_mb || MyUser(member->user)) ||
cli_fd(cli_from(member->user)) < 0)
continue;
cli_sentalong(member->user) = sentalong_marker;
/* pick right buffer to send */
send_buffer(member->user, MyConnect(member->user) ? user_mb : serv_mb, 0);
}
msgq_clean(user_mb);
if (serv_mb)
msgq_clean(serv_mb);
}
/** Send a (prefixed) command to all channels that \a from is on.
* @param[in] from Client originating the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] one Client direction to skip (or NULL).
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_common_channels_capab_butone(struct Client *from, const char *cmd,
const char *tok, struct Client *one,
int withcap, int skipcap,
const char *pattern, ...)
{
struct VarData vd;
struct MsgBuf *mb;
struct Membership *chan;
struct Membership *member;
assert(0 != from);
assert(0 != cli_from(from));
assert(0 != pattern);
assert(!IsServer(from) && !IsMe(from));
vd.vd_format = pattern; /* set up the struct VarData for %v */
va_start(vd.vd_args, pattern);
/* build the buffer */
mb = msgq_make(0, "%:#C %s %v", from, cmd, &vd);
va_end(vd.vd_args);
bump_sentalong(from);
/*
* loop through from's channels, and the members on their channels
*/
for (chan = cli_user(from)->channel; chan; chan = chan->next_channel) {
if (IsZombie(chan) || IsDelayedJoin(chan))
continue;
for (member = chan->channel->members; member;
member = member->next_member)
if (MyConnect(member->user)
&& -1 < cli_fd(cli_from(member->user))
&& member->user != one
&& cli_sentalong(member->user) != sentalong_marker
&& ((withcap == CAP_NONE) || CapActive(member->user, withcap))
&& ((skipcap == CAP_NONE) || !CapActive(member->user, skipcap))) {
cli_sentalong(member->user) = sentalong_marker;
send_buffer(member->user, mb, 0);
}
}
if (MyConnect(from) && from != one)
send_buffer(from, mb, 0);
msgq_clean(mb);
}
/** Send a (prefixed) command to all users on this channel, except for
* \a one and those matching \a skip.
* @warning \a pattern must not contain %v.
* @param[in] from Client originating the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] to Destination channel.
* @param[in] one Client direction to skip (or NULL).
* @param[in] skip Bitmask of SKIP_NONOPS, SKIP_NONVOICES, SKIP_DEAF, SKIP_BURST.
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_channel_butone(struct Client *from, const char *cmd,
const char *tok, struct Channel *to,
struct Client *one, unsigned int skip,
const char *pattern, ...)
{
struct Membership *member;
struct VarData vd;
struct MsgBuf *user_mb;
struct MsgBuf *serv_mb;
vd.vd_format = pattern;
/* Build buffer to send to users */
va_start(vd.vd_args, pattern);
user_mb = msgq_make(0, skip & (SKIP_NONOPS | SKIP_NONVOICES) ? "%:#C %s @%v" : "%:#C %s %v",
from, skip & (SKIP_NONOPS | SKIP_NONVOICES) ? MSG_NOTICE : cmd, &vd);
va_end(vd.vd_args);
/* Build buffer to send to servers */
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, "%C %s %v", from, tok, &vd);
va_end(vd.vd_args);
/* send buffer along! */
bump_sentalong(one);
for (member = to->members; member; member = member->next_member) {
/* skip one, zombies, and deaf users... */
if (IsZombie(member) ||
(skip & SKIP_DEAF && IsDeaf(member->user)) ||
(skip & SKIP_NONOPS && !IsChanOp(member)) ||
(skip & SKIP_NONVOICES && !IsChanOp(member) && !HasVoice(member)) ||
(skip & SKIP_BURST && IsBurstOrBurstAck(cli_from(member->user))) ||
cli_fd(cli_from(member->user)) < 0 ||
cli_sentalong(member->user) == sentalong_marker)
continue;
cli_sentalong(member->user) = sentalong_marker;
if (MyConnect(member->user)) /* pick right buffer to send */
send_buffer(member->user, user_mb, 0);
else
send_buffer(member->user, serv_mb, 0);
}
msgq_clean(user_mb);
msgq_clean(serv_mb);
}
static int crule_via(int numargs, void *crulearg[])
{
struct Client *acptr;
/* adapted from m_links */
for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr))
{
if (!IsServer(acptr) && !IsMe(acptr))
continue;
if (match((char *)crulearg[1], cli_name(acptr)))
continue;
if (match((char *)crulearg[0],
cli_name(LocalClientArray[cli_fd(cli_from(acptr))])))
continue;
return (1);
}
return (0);
}
static void sendheader(struct Client *cptr, int reportType)
{
static char *buffer = NULL;
static char *ptr_init;
/* FEAT_RH_PSEUDO_SERVERNAME, [email protected] */
if (buffer == NULL)
{
unsigned int len;
unsigned int required_len;
/* La primera vez que se ejecuta la rutina debemos copiar el nombre del servidor al buffer */
len = strlen((char *)feature_str(FEAT_RH_PSEUDO_SERVERNAME));
/* Ajustamos a un tamaño adecuado el nombre del servidor */
if (len > HOSTLEN)
len = HOSTLEN;
/* Establecemos el tamaño requerido a reservar en el malloc.
El 1 representa los dos puntos iniciales.
Len representa el tamaño del servername.
El siguiente 1 representa el espacio a continuación del servername.
El siguiente número representa el valor máximo del ancho de los snotices. OJO con este valor.
El 1 final representa el '\0' final.
*/
required_len = 1 + len + 1 + 75 + 1;
buffer = (char *)MyMalloc(sizeof(char)*required_len);
/* Establecemos los valores del buffer */
ptr_init = buffer;
*ptr_init++ = ':';
strncpy(ptr_init, (char *)feature_str(FEAT_RH_PSEUDO_SERVERNAME), len);
ptr_init += len;
*ptr_init++ = ' ';
/* Ahora tenemos situado 'ptr_init' en el lugar donde se podran copiar los SNOTICES */
}
/* Copiamos el SNOTICE adecuado */
strcpy(ptr_init, HeaderMessages[reportType].message);
/* Enviamos el mensaje al cliente */
send(cli_fd(cptr), buffer, strlen(buffer), 0);
}
/** Send a (prefixed) command to all users matching \a to as \a who.
* @warning \a pattern must not contain %v.
* @param[in] from Source of the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] to Destination host/server mask.
* @param[in] one Client direction to skip (or NULL).
* @param[in] who Type of match for \a to (either MATCH_HOST or MATCH_SERVER).
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_match_butone(struct Client *from, const char *cmd,
const char *tok, const char *to,
struct Client *one, unsigned int who,
const char *pattern, ...)
{
struct VarData vd;
struct Client *cptr;
struct MsgBuf *user_mb;
struct MsgBuf *serv_mb;
vd.vd_format = pattern;
/* Build buffer to send to users */
va_start(vd.vd_args, pattern);
user_mb = msgq_make(0, "%:#C %s %v", from, cmd, &vd);
va_end(vd.vd_args);
/* Build buffer to send to servers */
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, "%C %s %v", from, tok, &vd);
va_end(vd.vd_args);
/* send buffer along */
bump_sentalong(one);
for (cptr = GlobalClientList; cptr; cptr = cli_next(cptr)) {
if (!IsRegistered(cptr) || IsServer(cptr) || cli_fd(cli_from(cptr)) < 0 ||
cli_sentalong(cptr) == sentalong_marker ||
!match_it(from, cptr, to, who))
continue; /* skip it */
cli_sentalong(cptr) = sentalong_marker;
if (MyConnect(cptr)) /* send right buffer */
send_buffer(cptr, user_mb, 0);
else
send_buffer(cptr, serv_mb, 0);
}
msgq_clean(user_mb);
msgq_clean(serv_mb);
}
/** Release a Client.
* In addition to the cleanup done by dealloc_client(), this will free
* any pending auth request, free the connection for local clients,
* and delete the processing timer for the client.
* @param[in] cptr Client to free.
*/
void free_client(struct Client* cptr)
{
if (!cptr)
return;
/*
* forget to remove the client from the hash table?
*/
assert(cli_verify(cptr));
assert(cli_hnext(cptr) == cptr);
/* or from linked list? */
assert(cli_next(cptr) == 0);
assert(cli_prev(cptr) == 0);
Debug((DEBUG_LIST, "Freeing client %s [%p], connection %p", cli_name(cptr),
cptr, cli_connect(cptr)));
if (cli_auth(cptr))
destroy_auth_request(cli_auth(cptr), 0);
/* Make sure we didn't magically get re-added to the list */
assert(cli_next(cptr) == 0);
assert(cli_prev(cptr) == 0);
if (cli_from(cptr) == cptr) { /* in other words, we're local */
cli_from(cptr) = 0;
/* timer must be marked as not active */
if (!cli_freeflag(cptr) && !t_active(&(cli_proc(cptr))))
dealloc_connection(cli_connect(cptr)); /* connection not open anymore */
else {
if (-1 < cli_fd(cptr) && cli_freeflag(cptr) & FREEFLAG_SOCKET)
socket_del(&(cli_socket(cptr))); /* queue a socket delete */
if (cli_freeflag(cptr) & FREEFLAG_TIMER)
timer_del(&(cli_proc(cptr))); /* queue a timer delete */
}
}
cli_connect(cptr) = 0;
dealloc_client(cptr); /* actually destroy the client */
}
/** Send a (prefixed) WALL of type \a type to all users except \a one.
* @warning \a pattern must not contain %v.
* @param[in] from Source of the command.
* @param[in] type One of WALL_DESYNCH, WALL_WALLOPS or WALL_WALLUSERS.
* @param[in] one Client direction to skip (or NULL).
* @param[in] pattern Format string for command arguments.
*/
void sendwallto_group_butone(struct Client *from, int type, struct Client *one,
const char *pattern, ...)
{
struct VarData vd;
struct Client *cptr;
struct MsgBuf *mb;
struct DLink *lp;
char *prefix=NULL;
char *tok=NULL;
int his_wallops;
int i;
vd.vd_format = pattern;
/* Build buffer to send to users */
va_start(vd.vd_args, pattern);
switch (type) {
case WALL_DESYNCH:
prefix="";
tok=TOK_DESYNCH;
break;
case WALL_WALLOPS:
prefix="* ";
tok=TOK_WALLOPS;
break;
case WALL_WALLUSERS:
prefix="$ ";
tok=TOK_WALLUSERS;
break;
default:
assert(0);
}
mb = msgq_make(0, "%:#C " MSG_WALLOPS " :%s%v", from, prefix,&vd);
va_end(vd.vd_args);
/* send buffer along! */
his_wallops = feature_bool(FEAT_HIS_WALLOPS);
for (i = 0; i <= HighestFd; i++)
{
if (!(cptr = LocalClientArray[i]) ||
(cli_fd(cli_from(cptr)) < 0) ||
(type == WALL_DESYNCH && !SendDebug(cptr)) ||
(type == WALL_WALLOPS &&
(!SendWallops(cptr) || (his_wallops && !IsAnOper(cptr)))) ||
(type == WALL_WALLUSERS && !SendWallops(cptr)))
continue; /* skip it */
send_buffer(cptr, mb, 1);
}
msgq_clean(mb);
/* Build buffer to send to servers */
va_start(vd.vd_args, pattern);
mb = msgq_make(&me, "%C %s :%v", from, tok, &vd);
va_end(vd.vd_args);
/* send buffer along! */
for (lp = cli_serv(&me)->down; lp; lp = lp->next) {
if (one && lp->value.cptr == cli_from(one))
continue;
send_buffer(lp->value.cptr, mb, 1);
}
msgq_clean(mb);
}
/** Send a (prefixed) command to all users on this channel, except for
* \a one and those matching \a skip.
* @warning \a pattern must not contain %v.
* @param[in] from Client originating the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] to Destination channel.
* @param[in] one Client direction to skip (or NULL).
* @param[in] skip Bitmask of SKIP_NONOPS, SKIP_NONVOICES, SKIP_DEAF, SKIP_BURST.
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_channel_butone(struct Client *from, const char *cmd,
const char *tok, struct Channel *to,
struct Client *one, unsigned int skip,
unsigned char prefix, const char *pattern, ...)
{
struct Membership *member;
struct VarData vd;
struct MsgBuf *user_mb;
struct MsgBuf *serv_mb;
struct Client *service;
const char *userfmt;
const char *usercmd;
vd.vd_format = pattern;
/* Build buffer to send to users */
usercmd = cmd;
userfmt = "%:#C %s %v";
if (skip & (SKIP_NONOPS | SKIP_NONHOPS | SKIP_NONVOICES)) {
usercmd = MSG_NOTICE;
if (skip & SKIP_NONVOICES)
userfmt = "%:#C %s +%v";
else if (skip & SKIP_NONHOPS)
userfmt = "%:#C %s %%%v";
else
userfmt = "%:#C %s @%v";
}
va_start(vd.vd_args, pattern);
user_mb = msgq_make(0, userfmt, from, usercmd, &vd);
va_end(vd.vd_args);
/* Build buffer to send to servers */
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, "%C %s %v", from, tok, &vd);
va_end(vd.vd_args);
/* send buffer along! */
bump_sentalong(one);
for (member = to->members; member; member = member->next_member) {
/* skip one, zombies, and deaf users... */
if (IsZombie(member) ||
(skip & SKIP_DEAF && IsDeaf(member->user)) ||
(skip & SKIP_NONOPS && !IsChanOp(member)) ||
(skip & SKIP_NONHOPS && !IsChanOp(member) && !IsHalfOp(member)) ||
(skip & SKIP_NONVOICES && !IsChanOp(member) && !IsHalfOp(member) && !HasVoice(member)) ||
(skip & SKIP_BURST && IsBurstOrBurstAck(cli_from(member->user))) ||
(is_silenced(from, member->user, 1)) ||
cli_fd(cli_from(member->user)) < 0 ||
cli_sentalong(member->user) == sentalong_marker)
continue;
cli_sentalong(member->user) = sentalong_marker;
if (MyConnect(member->user)) /* pick right buffer to send */
send_buffer(member->user, user_mb, 0);
else
send_buffer(member->user, serv_mb, 0);
}
/* Consult service forwarding table. */
if(GlobalForwards[prefix]
&& (service = FindServer(GlobalForwards[prefix]))
&& cli_sentalong(service) != sentalong_marker) {
cli_sentalong(service) = sentalong_marker;
send_buffer(service, serv_mb, 0);
}
msgq_clean(user_mb);
msgq_clean(serv_mb);
}
/** Start a connection to another server.
* @param aconf Connect block data for target server.
* @param by Client who requested the connection (if any).
* @return Non-zero on success; zero on failure.
*/
int connect_server(struct ConfItem* aconf, struct Client* by)
{
struct Client* cptr = 0;
assert(0 != aconf);
if (aconf->dns_pending) {
sendto_opmask_butone(0, SNO_OLDSNO, "Server %s connect DNS pending",
aconf->name);
return 0;
}
Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name,
ircd_ntoa(&aconf->address.addr)));
if ((cptr = FindClient(aconf->name))) {
if (IsServer(cptr) || IsMe(cptr)) {
sendto_opmask_butone(0, SNO_OLDSNO, "Server %s already present from %s",
aconf->name, cli_name(cli_from(cptr)));
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present "
"from %s", by, aconf->name, cli_name(cli_from(cptr)));
}
return 0;
}
else if (IsHandshake(cptr) || IsConnecting(cptr)) {
if (by && IsUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in "
"progress", by, cli_name(cptr));
}
return 0;
}
}
/*
* If we don't know the IP# for this host and it is a hostname and
* not a ip# string, then try and find the appropriate host record.
*/
if (!irc_in_addr_valid(&aconf->address.addr)
&& !ircd_aton(&aconf->address.addr, aconf->host)) {
char buf[HOSTLEN + 1];
host_from_uh(buf, aconf->host, HOSTLEN);
gethost_byname(buf, connect_dns_callback, aconf);
aconf->dns_pending = 1;
return 0;
}
cptr = make_client(NULL, STAT_UNKNOWN_SERVER);
/*
* Copy these in so we have something for error detection.
*/
ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN);
ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN);
/*
* Attach config entries to client here rather than in
* completed_connection. This to avoid null pointer references
*/
attach_confs_byhost(cptr, aconf->host, CONF_SERVER);
if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) {
sendto_opmask_butone(0, SNO_OLDSNO, "Host %s is not enabled for "
"connecting: no Connect block", aconf->name);
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no "
"Connect block", by, aconf->name);
}
det_confs_butmask(cptr, 0);
free_client(cptr);
return 0;
}
/*
* attempt to connect to the server in the conf line
*/
if (!connect_inet(aconf, cptr)) {
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by,
cli_name(cptr));
}
det_confs_butmask(cptr, 0);
free_client(cptr);
return 0;
}
/*
* NOTE: if we're here we have a valid C:Line and the client should
* have started the connection and stored the remote address/port and
* ip address name in itself
*
* The socket has been connected or connect is in progress.
*/
make_server(cptr);
if (by && IsUser(by)) {
ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s",
NumNick(by));
assert(0 == cli_serv(cptr)->user);
cli_serv(cptr)->user = cli_user(by);
cli_user(by)->refcnt++;
}
else {
*(cli_serv(cptr))->by = '\0';
/* strcpy(cptr->serv->by, "Auto"); */
}
cli_serv(cptr)->up = &me;
SetConnecting(cptr);
if (cli_fd(cptr) > HighestFd)
HighestFd = cli_fd(cptr);
LocalClientArray[cli_fd(cptr)] = cptr;
Count_newunknown(UserStats);
/* Actually we lie, the connect hasn't succeeded yet, but we have a valid
* cptr, so we register it now.
* Maybe these two calls should be merged.
*/
add_client_to_list(cptr);
hAddClient(cptr);
/* nextping = CurrentTime; */
return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ?
completed_connection(cptr) : 1;
}
/** Process events on a client socket.
* @param ev Socket event structure that has a struct Connection as
* its associated data.
*/
static void client_sock_callback(struct Event* ev)
{
struct Client* cptr;
struct Connection* con;
char *fmt = "%s";
char *fallback = 0;
assert(0 != ev_socket(ev));
assert(0 != s_data(ev_socket(ev)));
con = (struct Connection*) s_data(ev_socket(ev));
assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
cptr = con_client(con);
assert(0 == cptr || con == cli_connect(cptr));
switch (ev_type(ev)) {
case ET_DESTROY:
con_freeflag(con) &= ~FREEFLAG_SOCKET;
if (!con_freeflag(con) && !cptr)
free_connection(con);
break;
case ET_CONNECT: /* socket connection completed */
if (!completed_connection(cptr) || IsDead(cptr))
fallback = cli_info(cptr);
break;
case ET_ERROR: /* an error occurred */
fallback = cli_info(cptr);
cli_error(cptr) = ev_data(ev);
if (s_state(&(con_socket(con))) == SS_CONNECTING) {
completed_connection(cptr);
/* for some reason, the os_get_sockerr() in completed_connect()
* can return 0 even when ev_data(ev) indicates a real error, so
* re-assign the client error here.
*/
cli_error(cptr) = ev_data(ev);
break;
}
/*FALLTHROUGH*/
case ET_EOF: /* end of file on socket */
Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr),
cli_error(cptr)));
SetFlag(cptr, FLAG_DEADSOCKET);
if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) {
exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)",
cli_name(cptr), cli_serv(cptr)->last_error_msg);
return;
} else {
fmt = "Read error: %s";
fallback = "EOF from client";
}
break;
case ET_WRITE: /* socket is writable */
ClrFlag(cptr, FLAG_BLOCKED);
if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048)
list_next_channels(cptr);
Debug((DEBUG_SEND, "Sending queued data to %C", cptr));
send_queued(cptr);
break;
case ET_READ: /* socket is readable */
if (!IsDead(cptr)) {
Debug((DEBUG_DEBUG, "Reading data from %C", cptr));
if (read_packet(cptr, 1) == 0) /* error while reading packet */
fallback = "EOF from client";
}
break;
default:
assert(0 && "Unrecognized socket event in client_sock_callback()");
break;
}
assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
if (fallback) {
const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback;
if (!msg)
msg = "Unknown error";
exit_client_msg(cptr, cptr, &me, fmt, msg);
}
}
/** Test whether we can send to a client.
* @param[in] to Client we want to send to.
* @return Non-zero if we can send to the client.
*/
static int can_send(struct Client* to)
{
assert(0 != to);
return (IsDead(to) || IsMe(to) || -1 == cli_fd(to)) ? 0 : 1;
}
/** Read a 'packet' of data from a connection and process it. Read in
* 8k chunks to give a better performance rating (for server
* connections). Do some tricky stuff for client connections to make
* sure they don't do any flooding >:-) -avalon
* @param cptr Client from which to read data.
* @param socket_ready If non-zero, more data can be read from the client's socket.
* @return Positive number on success, zero on connection-fatal failure, negative
* if user is killed.
*/
static int read_packet(struct Client *cptr, int socket_ready)
{
unsigned int dolen = 0;
unsigned int length = 0;
if (socket_ready &&
!(IsUser(cptr) &&
DBufLength(&(cli_recvQ(cptr))) > feature_uint(FEAT_CLIENT_FLOOD))) {
#if defined(USE_SSL)
switch (client_recv(cptr, readbuf, sizeof(readbuf), &length)) {
#else
switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) {
#endif
case IO_SUCCESS:
if (length)
{
cli_lasttime(cptr) = CurrentTime;
ClearPingSent(cptr);
ClrFlag(cptr, FLAG_NONL);
if (cli_lasttime(cptr) > cli_since(cptr))
cli_since(cptr) = cli_lasttime(cptr);
}
break;
case IO_BLOCKED:
break;
case IO_FAILURE:
cli_error(cptr) = errno;
/* SetFlag(cptr, FLAG_DEADSOCKET); */
return 0;
}
}
/*
* For server connections, we process as many as we can without
* worrying about the time of day or anything :)
*/
if (length > 0 && IsServer(cptr))
return server_dopacket(cptr, readbuf, length);
else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr)))
return connect_dopacket(cptr, readbuf, length);
else
{
/*
* Before we even think of parsing what we just read, stick
* it on the end of the receive queue and do it when its
* turn comes around.
*/
if (length > 0 && dbuf_put(cptr, &(cli_recvQ(cptr)), readbuf, length) == 0)
return exit_client(cptr, cptr, &me, "dbuf_put fail");
if ((DBufLength(&(cli_recvQ(cptr))) > feature_uint(FEAT_CLIENT_FLOOD))
&& !IsChannelService(cptr))
return exit_client(cptr, cptr, &me, "Excess Flood");
while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
(IsTrusted(cptr) || IsChannelService(cptr) || cli_since(cptr) - CurrentTime < 10))
{
dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE);
/*
* Devious looking...whats it do ? well..if a client
* sends a *long* message without any CR or LF, then
* dbuf_getmsg fails and we pull it out using this
* loop which just gets the next 512 bytes and then
* deletes the rest of the buffer contents.
* -avalon
*/
if (dolen == 0)
{
if (DBufLength(&(cli_recvQ(cptr))) < 510)
SetFlag(cptr, FLAG_NONL);
else
{
/* More than 512 bytes in the line - drop the input and yell
* at the client.
*/
DBufClear(&(cli_recvQ(cptr)));
send_reply(cptr, ERR_INPUTTOOLONG);
}
}
else if (client_dopacket(cptr, dolen) == CPTR_KILLED)
return CPTR_KILLED;
/*
* If it has become registered as a Server
* then skip the per-message parsing below.
*/
if (IsHandshake(cptr) || IsServer(cptr))
{
while (-1)
{
dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf));
if (dolen <= 0)
return 1;
else if (dolen == 0)
{
if (DBufLength(&(cli_recvQ(cptr))) < 510)
SetFlag(cptr, FLAG_NONL);
else {
DBufClear(&(cli_recvQ(cptr)));
/* send_reply(cptr, ERR_INPUTTOOLONG); */
}
}
else if ((IsServer(cptr) &&
server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) ||
(!IsServer(cptr) &&
connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED))
return CPTR_KILLED;
}
}
}
/* If there's still data to process, wait 2 seconds first */
if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
!t_onqueue(&(cli_proc(cptr))))
{
Debug((DEBUG_LIST, "Adding client process timer for %C", cptr));
cli_freeflag(cptr) |= FREEFLAG_TIMER;
timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr),
TT_RELATIVE, 2);
}
}
return 1;
}
/** Start a connection to another server.
* @param aconf Connect block data for target server.
* @param by Client who requested the connection (if any).
* @return Non-zero on success; zero on failure.
*/
int connect_server(struct ConfItem* aconf, struct Client* by)
{
struct Client* cptr = 0;
assert(0 != aconf);
if (aconf->dns_pending) {
sendto_opmask(0, SNO_OLDSNO, "Server %s connect DNS pending",
aconf->name);
return 0;
}
Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name,
ircd_ntoa(&aconf->address.addr)));
if ((cptr = FindClient(aconf->name))) {
if (IsServer(cptr) || IsMe(cptr)) {
sendto_opmask(0, SNO_OLDSNO, "Server %s already present from %s",
aconf->name, cli_name(cli_from(cptr)));
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Server %s already present "
"from %s", by, aconf->name, cli_name(cli_from(cptr)));
}
return 0;
}
else if (IsHandshake(cptr) || IsConnecting(cptr)) {
if (by && IsUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connection to %s already in "
"progress", by, cli_name(cptr));
}
return 0;
}
}
/*
* If we don't know the IP# for this host and it is a hostname and
* not a ip# string, then try and find the appropriate host record.
*/
if (!irc_in_addr_valid(&aconf->address.addr)
&& !ircd_aton(&aconf->address.addr, aconf->host)) {
char buf[HOSTLEN + 1];
host_from_uh(buf, aconf->host, HOSTLEN);
gethost_byname(buf, connect_dns_callback, aconf);
aconf->dns_pending = 1;
return 0;
}
cptr = make_client(NULL, STAT_UNKNOWN_SERVER);
/*
* Copy these in so we have something for error detection.
*/
ircd_strncpy(cli_name(cptr), aconf->name, HOSTLEN);
ircd_strncpy(cli_sockhost(cptr), aconf->host, HOSTLEN);
/*
* Attach config entries to client here rather than in
* completed_connection. This to avoid null pointer references
*/
attach_confs_byhost(cptr, aconf->host, CONF_SERVER);
if (!find_conf_byhost(cli_confs(cptr), aconf->host, CONF_SERVER)) {
sendto_opmask(0, SNO_OLDSNO, "Host %s is not enabled for "
"connecting: no Connect block", aconf->name);
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Connect to host %s failed: no "
"Connect block", by, aconf->name);
}
det_confs_butmask(cptr, 0);
free_client(cptr);
return 0;
}
/*
* attempt to connect to the server in the conf line
*/
if (!connect_inet(aconf, cptr)) {
if (by && IsUser(by) && !MyUser(by)) {
sendcmdto_one(&me, CMD_NOTICE, by, "%C :Couldn't connect to %s", by,
cli_name(cptr));
}
det_confs_butmask(cptr, 0);
free_client(cptr);
return 0;
}
/*
* NOTE: if we're here we have a valid C:Line and the client should
* have started the connection and stored the remote address/port and
* ip address name in itself
*
* The socket has been connected or connect is in progress.
*/
make_server(cptr);
if (by && IsUser(by)) {
ircd_snprintf(0, cli_serv(cptr)->by, sizeof(cli_serv(cptr)->by), "%s%s",
NumNick(by));
assert(0 == cli_serv(cptr)->user);
cli_serv(cptr)->user = cli_user(by);
cli_user(by)->refcnt++;
}
else {
*(cli_serv(cptr))->by = '\0';
/* strcpy(cptr->serv->by, "Auto"); */
}
cli_serv(cptr)->up = &me;
SetConnecting(cptr);
if (cli_fd(cptr) > HighestFd)
HighestFd = cli_fd(cptr);
LocalClientArray[cli_fd(cptr)] = cptr;
Count_newunknown(UserStats);
/* Actually we lie, the connect hasn't succeeded yet, but we have a valid
* cptr, so we register it now.
* Maybe these two calls should be merged.
*/
add_client_to_list(cptr);
hAddClient(cptr);
/* nextping = CurrentTime; */
return (s_state(&cli_socket(cptr)) == SS_CONNECTED) ?
completed_connection(cptr) : 1;
}
/** Find the real hostname for the host running the server (or one which
* matches the server's name) and its primary IP#. Hostname is stored
* in the client structure passed as a pointer.
*/
void init_server_identity(void)
{
const struct LocalConf* conf = conf_get_local();
assert(0 != conf);
ircd_strncpy(cli_name(&me), conf->name, HOSTLEN);
SetYXXServerName(&me, conf->numeric);
}
/** Process events on a client socket.
* @param ev Socket event structure that has a struct Connection as
* its associated data.
*/
static void client_sock_callback(struct Event* ev)
{
struct Client* cptr;
struct Connection* con;
char *fmt = "%s";
char *fallback = 0;
assert(0 != ev_socket(ev));
assert(0 != s_data(ev_socket(ev)));
con = (struct Connection*) s_data(ev_socket(ev));
assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
cptr = con_client(con);
assert(0 == cptr || con == cli_connect(cptr));
switch (ev_type(ev)) {
case ET_DESTROY:
con_freeflag(con) &= ~FREEFLAG_SOCKET;
if (!con_freeflag(con) && !cptr)
free_connection(con);
#if defined(USE_SSL)
ssl_free(ev_socket(ev));
#endif
break;
case ET_CONNECT: /* socket connection completed */
if (!completed_connection(cptr) || IsDead(cptr))
fallback = cli_info(cptr);
break;
case ET_ERROR: /* an error occurred */
fallback = cli_info(cptr);
cli_error(cptr) = ev_data(ev);
/* If the OS told us we have a bad file descriptor, we should
* record that for future reference.
*/
if (cli_error(cptr) == EBADF)
cli_fd(cptr) = -1;
if (s_state(&(con_socket(con))) == SS_CONNECTING) {
completed_connection(cptr);
/* for some reason, the os_get_sockerr() in completed_connection()
* can return 0 even when ev_data(ev) indicates a real error, so
* re-assign the client error here.
*/
cli_error(cptr) = ev_data(ev);
break;
}
/*FALLTHROUGH*/
case ET_EOF: /* end of file on socket */
Debug((DEBUG_ERROR, "READ ERROR: fd = %d %d", cli_fd(cptr),
cli_error(cptr)));
SetFlag(cptr, FLAG_DEADSOCKET);
if ((IsServer(cptr) || IsHandshake(cptr)) && cli_error(cptr) == 0) {
exit_client_msg(cptr, cptr, &me, "Server %s closed the connection (%s)",
cli_name(cptr), cli_serv(cptr)->last_error_msg);
return;
} else {
fmt = "Read error: %s";
fallback = "EOF from client";
}
break;
case ET_WRITE: /* socket is writable */
ClrFlag(cptr, FLAG_BLOCKED);
if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048)
list_next_channels(cptr);
Debug((DEBUG_SEND, "Sending queued data to %C", cptr));
send_queued(cptr);
break;
case ET_READ: /* socket is readable */
if (!IsDead(cptr)) {
Debug((DEBUG_DEBUG, "Reading data from %C", cptr));
if (read_packet(cptr, 1) == 0) /* error while reading packet */
fallback = "EOF from client";
}
break;
default:
assert(0 && "Unrecognized socket event in client_sock_callback()");
break;
}
assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
if (fallback) {
const char* msg = (cli_error(cptr)) ? strerror(cli_error(cptr)) : fallback;
if (!msg)
msg = "Unknown error";
exit_client_msg(cptr, cptr, &me, fmt, msg);
}
}
/** Process a timer on client socket.
* @param ev Timer event that has a struct Connection as its
* associated data.
*/
static void client_timer_callback(struct Event* ev)
{
struct Client* cptr;
struct Connection* con;
assert(0 != ev_timer(ev));
assert(0 != t_data(ev_timer(ev)));
assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev));
con = (struct Connection*) t_data(ev_timer(ev));
assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);
cptr = con_client(con);
assert(0 == cptr || con == cli_connect(cptr));
if (ev_type(ev)== ET_DESTROY) {
con_freeflag(con) &= ~FREEFLAG_TIMER; /* timer has expired... */
if (!con_freeflag(con) && !cptr)
free_connection(con); /* client is being destroyed */
} else {
Debug((DEBUG_LIST, "Client process timer for %C expired; processing",
cptr));
read_packet(cptr, 0); /* read_packet will re-add timer if needed */
}
assert(0 == cptr || 0 == cli_connect(cptr) || con == cli_connect(cptr));
}
/** Send a (prefixed) command to all users matching \a to as \a who.
* @warning \a pattern must not contain %v.
* @param[in] from Source of the command.
* @param[in] cmd Long name of command.
* @param[in] tok Short name of command.
* @param[in] to Destination host/server mask.
* @param[in] one Client direction to skip (or NULL).
* @param[in] who Type of match for \a to (either MATCH_HOST or MATCH_SERVER).
* @param[in] pattern Format string for command arguments.
*/
void sendcmdto_match(struct Client *from, const char *cmd,
const char *tok, const char *to,
struct Client *one, unsigned int who,
const char *pattern, ...)
{
struct VarData vd;
struct irc_in_addr addr;
struct Client *cptr;
struct MsgBuf *user_mb;
struct MsgBuf *serv_mb;
unsigned char nbits;
vd.vd_format = pattern;
/* See if destination looks like an IP mask. */
if (!ipmask_parse(to, &addr, &nbits))
nbits = 255;
/* Build buffer to send to users */
va_start(vd.vd_args, pattern);
/*
TODO-ZOLTAN: Revisar el tema de Globales
if (IsUser(from) && IsService(cli_user(from)->server))
*/
user_mb = msgq_make(0, "%:#C %s %v", from, cmd, &vd);
/*
else
{
char *mask, *msg;
mask = (char *)va_arg(vd.vd_args, char *);
msg = (char *)va_arg(vd.vd_args, char *);
user_mb = msgq_make(0, "%:#C %s :*** Global Message -> (%s): %s",
from, cmd, mask, msg);
}
*/
va_end(vd.vd_args);
/* Build buffer to send to servers */
va_start(vd.vd_args, pattern);
serv_mb = msgq_make(&me, "%C %s %v", from, tok, &vd);
va_end(vd.vd_args);
/* send buffer along */
bump_sentalong(one);
for (cptr = GlobalClientList; cptr; cptr = cli_next(cptr)) {
if (cli_sentalong(cptr) == sentalong_marker ||
!IsRegistered(cptr) ||
IsServer(cptr) ||
!match_it(from, cptr, to, &addr, nbits, who) ||
cli_fd(cli_from(cptr)) < 0)
continue; /* skip it */
cli_sentalong(cptr) = sentalong_marker;
if (MyConnect(cptr)) /* send right buffer */
send_buffer(cptr, user_mb, 0);
else
send_buffer(cptr, serv_mb, 0);
}
msgq_clean(user_mb);
msgq_clean(serv_mb);
}
static
void do_trace(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
{
int i;
struct Client *acptr;
struct Client *acptr2;
const struct ConnectionClass* cl;
char* tname;
int doall;
int *link_s;
int *link_u;
int cnt = 0;
int wilds;
int dow;
if (parc < 2 || BadPtr(parv[1]))
{
/* just "TRACE" without parameters. Must be from local client */
parc = 1;
acptr = &me;
tname = cli_name(&me);
i = HUNTED_ISME;
}
else if (parc < 3 || BadPtr(parv[2]))
{
/* No target specified. Make one before propagating. */
parc = 2;
tname = parv[1];
if ((acptr = find_match_server(parv[1])) ||
((acptr = FindClient(parv[1])) && !MyUser(acptr)))
{
if (IsUser(acptr))
parv[2] = cli_name(cli_user(acptr)->server);
else
parv[2] = cli_name(acptr);
parc = 3;
parv[3] = 0;
if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, IsServer(acptr),
"%s :%C", 2, parc, parv)) == HUNTED_NOSUCH)
return;
}
else
i = HUNTED_ISME;
} else {
/* Got "TRACE <tname> :<target>" */
parc = 3;
if (MyUser(sptr) || Protocol(cptr) < 10)
acptr = find_match_server(parv[2]);
else
acptr = FindNServer(parv[2]);
if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, 0, "%s :%C", 2, parc,
parv)) == HUNTED_NOSUCH)
return;
tname = parv[1];
}
if (i == HUNTED_PASS) {
if (!acptr)
acptr = next_client(GlobalClientList, tname);
else
acptr = cli_from(acptr);
send_reply(sptr, RPL_TRACELINK,
version, debugmode, tname,
acptr ? cli_name(cli_from(acptr)) : "<No_match>");
return;
}
doall = (parv[1] && (parc > 1)) ? !match(tname, cli_name(&me)) : 1;
wilds = !parv[1] || strchr(tname, '*') || strchr(tname, '?');
dow = wilds || doall;
/* Don't give (long) remote listings to lusers */
if (dow && !MyConnect(sptr) && !IsAnOper(sptr)) {
send_reply(sptr, RPL_TRACEEND);
return;
}
link_s = MyCalloc(2 * maxconnections, sizeof(link_s[0]));
link_u = link_s + maxconnections;
if (doall) {
for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr)) {
if (IsUser(acptr))
link_u[cli_fd(cli_from(acptr))]++;
else if (IsServer(acptr))
link_s[cli_fd(cli_from(acptr))]++;
}
}
/* report all direct connections */
for (i = 0; i <= HighestFd; i++) {
const char *conClass;
if (!(acptr = LocalClientArray[i])) /* Local Connection? */
continue;
if (IsInvisible(acptr) && dow && !(MyConnect(sptr) && IsOper(sptr)) &&
!IsAnOper(acptr) && (acptr != sptr))
continue;
if (!doall && wilds && match(tname, cli_name(acptr)))
continue;
if (!dow && 0 != ircd_strcmp(tname, cli_name(acptr)))
continue;
conClass = get_client_class(acptr);
switch (cli_status(acptr)) {
case STAT_CONNECTING:
send_reply(sptr, RPL_TRACECONNECTING, conClass, cli_name(acptr));
cnt++;
break;
case STAT_HANDSHAKE:
send_reply(sptr, RPL_TRACEHANDSHAKE, conClass, cli_name(acptr));
cnt++;
break;
case STAT_ME:
break;
case STAT_UNKNOWN:
case STAT_UNKNOWN_USER:
send_reply(sptr, RPL_TRACEUNKNOWN, conClass,
get_client_name(acptr, HIDE_IP));
cnt++;
break;
case STAT_UNKNOWN_SERVER:
send_reply(sptr, RPL_TRACEUNKNOWN, conClass, "Unknown Server");
cnt++;
break;
case STAT_USER:
/* Only opers see users if there is a wildcard
but anyone can see all the opers. */
if ((IsAnOper(sptr) && (MyUser(sptr) ||
!(dow && IsInvisible(acptr)))) || !dow || IsAnOper(acptr)) {
if (IsAnOper(acptr))
send_reply(sptr, RPL_TRACEOPERATOR, conClass,
get_client_name(acptr, SHOW_IP),
CurrentTime - cli_lasttime(acptr));
else
send_reply(sptr, RPL_TRACEUSER, conClass,
get_client_name(acptr, SHOW_IP),
CurrentTime - cli_lasttime(acptr));
cnt++;
}
break;
/*
* Connection is a server
*
* Serv <class> <nS> <nC> <name> <ConnBy> <last> <age>
*
* class Class the server is in
* nS Number of servers reached via this link
* nC Number of clients reached via this link
* name Name of the server linked
* ConnBy Who established this link
* last Seconds since we got something from this link
* age Seconds this link has been alive
*
* Additional comments etc...... -Cym-<*****@*****.**>
*/
case STAT_SERVER:
if (cli_serv(acptr)->user) {
if (!cli_serv(acptr)->by[0]
|| !(acptr2 = findNUser(cli_serv(acptr)->by))
|| (cli_user(acptr2) != cli_serv(acptr)->user))
acptr2 = NULL;
send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i],
link_u[i], cli_name(acptr),
acptr2 ? cli_name(acptr2) : "*",
cli_serv(acptr)->user->username,
cli_serv(acptr)->user->host,
CurrentTime - cli_lasttime(acptr),
CurrentTime - cli_serv(acptr)->timestamp);
} else
send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i],
link_u[i], cli_name(acptr),
(*(cli_serv(acptr))->by) ? cli_serv(acptr)->by : "*", "*",
cli_name(&me), CurrentTime - cli_lasttime(acptr),
CurrentTime - cli_serv(acptr)->timestamp);
cnt++;
break;
default: /* We actually shouldn't come here, -msa */
send_reply(sptr, RPL_TRACENEWTYPE, get_client_name(acptr, HIDE_IP));
cnt++;
break;
}
}
/*
* Add these lines to summarize the above which can get rather long
* and messy when done remotely - Avalon
*/
if (IsAnOper(sptr) && doall) {
for (cl = get_class_list(); cl; cl = cl->next) {
if (Links(cl) > 1)
send_reply(sptr, RPL_TRACECLASS, ConClass(cl), Links(cl) - 1);
}
}
send_reply(sptr, RPL_TRACEEND);
MyFree(link_s);
}
/* Rewritten by Run - 24 sept 94 */
static void exit_one_client(struct Client* bcptr, const char* comment)
{
struct SLink *lp;
struct Ban *bp;
if (cli_serv(bcptr) && cli_serv(bcptr)->client_list) /* Was SetServerYXX called ? */
ClearServerYXX(bcptr); /* Removes server from server_list[] */
if (IsUser(bcptr)) {
/*
* clear out uping requests
*/
if (IsUPing(bcptr))
uping_cancel(bcptr, 0);
/*
* Stop a running /LIST clean
*/
if (MyUser(bcptr) && cli_listing(bcptr)) {
MyFree(cli_listing(bcptr));
cli_listing(bcptr) = NULL;
}
/*
* If a person is on a channel, send a QUIT notice
* to every client (person) on the same channel (so
* that the client can show the "**signoff" message).
* (Note: The notice is to the local clients *only*)
*/
sendcmdto_common_channels_butone(bcptr, CMD_QUIT, NULL, ":%s", comment);
remove_user_from_all_channels(bcptr);
/* Clean up invitefield */
while ((lp = cli_user(bcptr)->invited))
del_invite(bcptr, lp->value.chptr);
/* Clean up silencefield */
while ((bp = cli_user(bcptr)->silence)) {
cli_user(bcptr)->silence = bp->next;
free_ban(bp);
}
/* Clean up snotice lists */
if (MyUser(bcptr))
set_snomask(bcptr, ~0, SNO_DEL);
if (IsInvisible(bcptr)) {
assert(UserStats.inv_clients > 0);
--UserStats.inv_clients;
}
if (IsOper(bcptr)) {
assert(UserStats.opers > 0);
--UserStats.opers;
}
if (MyConnect(bcptr))
Count_clientdisconnects(bcptr, UserStats);
else
Count_remoteclientquits(UserStats, bcptr);
}
else if (IsServer(bcptr))
{
/* Remove downlink list node of uplink */
remove_dlink(&(cli_serv(cli_serv(bcptr)->up))->down, cli_serv(bcptr)->updown);
cli_serv(bcptr)->updown = 0;
if (MyConnect(bcptr))
Count_serverdisconnects(UserStats);
else
Count_remoteserverquits(UserStats);
}
else if (IsMe(bcptr))
{
sendto_opmask_butone(0, SNO_OLDSNO, "ERROR: tried to exit me! : %s",
comment);
return; /* ...must *never* exit self! */
}
else if (IsUnknown(bcptr) || IsConnecting(bcptr) || IsHandshake(bcptr))
Count_unknowndisconnects(UserStats);
/*
* Update IPregistry
*/
if (IsIPChecked(bcptr))
IPcheck_disconnect(bcptr);
/*
* Remove from serv->client_list
* NOTE: user is *always* NULL if this is a server
*/
if (cli_user(bcptr)) {
assert(!IsServer(bcptr));
/* bcptr->user->server->serv->client_list[IndexYXX(bcptr)] = NULL; */
RemoveYXXClient(cli_user(bcptr)->server, cli_yxx(bcptr));
}
/* Remove bcptr from the client list */
#ifdef DEBUGMODE
if (hRemClient(bcptr) != 0)
Debug((DEBUG_ERROR, "%p !in tab %s[%s] %p %p %p %d %d %p",
bcptr, cli_name(bcptr), cli_from(bcptr) ? cli_sockhost(cli_from(bcptr)) : "??host",
cli_from(bcptr), cli_next(bcptr), cli_prev(bcptr), cli_fd(bcptr),
cli_status(bcptr), cli_user(bcptr)));
#else
hRemClient(bcptr);
#endif
remove_client_from_list(bcptr);
}
/** Set up address and port and make a connection.
* @param aconf Provides the connection information.
* @param cptr Client structure for the peer.
* @return Non-zero on success; zero on failure.
*/
static int connect_inet(struct ConfItem* aconf, struct Client* cptr)
{
const struct irc_sockaddr *local;
IOResult result;
int family = 0;
assert(0 != aconf);
assert(0 != cptr);
/*
* Might as well get sockhost from here, the connection is attempted
* with it so if it fails its useless.
*/
if (irc_in_addr_valid(&aconf->origin.addr))
local = &aconf->origin;
else if (irc_in_addr_is_ipv4(&aconf->address.addr)) {
local = &VirtualHost_v4;
family = AF_INET;
} else
local = &VirtualHost_v6;
cli_fd(cptr) = os_socket(local, SOCK_STREAM, cli_name(cptr), family);
if (cli_fd(cptr) < 0)
return 0;
/*
* save connection info in client
*/
memcpy(&cli_ip(cptr), &aconf->address.addr, sizeof(cli_ip(cptr)));
ircd_ntoa_r(cli_sock_ip(cptr), &cli_ip(cptr));
/*
* we want a big buffer for server connections
*/
if (!os_set_sockbufs(cli_fd(cptr), feature_int(FEAT_SOCKSENDBUF), feature_int(FEAT_SOCKRECVBUF))) {
cli_error(cptr) = errno;
report_error(SETBUFS_ERROR_MSG, cli_name(cptr), errno);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
/*
* Set the TOS bits - this is nonfatal if it doesn't stick.
*/
if (!os_set_tos(cli_fd(cptr), feature_int(FEAT_TOS_SERVER))) {
report_error(TOS_ERROR_MSG, cli_name(cptr), errno);
}
if ((result = os_connect_nonb(cli_fd(cptr), &aconf->address)) == IO_FAILURE) {
cli_error(cptr) = errno;
report_error(CONNECT_ERROR_MSG, cli_name(cptr), errno);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
if (!socket_add(&(cli_socket(cptr)), client_sock_callback,
(void*) cli_connect(cptr),
(result == IO_SUCCESS) ? SS_CONNECTED : SS_CONNECTING,
SOCK_EVENT_READABLE, cli_fd(cptr))) {
cli_error(cptr) = ENFILE;
report_error(REGISTER_ERROR_MSG, cli_name(cptr), ENFILE);
close(cli_fd(cptr));
cli_fd(cptr) = -1;
return 0;
}
cli_freeflag(cptr) |= FREEFLAG_SOCKET;
return 1;
}
/** Attempt to send a sequence of bytes to the connection.
* As a side effect, updates \a cptr's FLAG_BLOCKED setting
* and sendB/sendK fields.
* @param cptr Client that should receive data.
* @param buf Message buffer to send to client.
* @return Negative on connection-fatal error; otherwise
* number of bytes sent.
*/
unsigned int deliver_it(struct Client *cptr, struct MsgQ *buf)
{
unsigned int bytes_written = 0;
unsigned int bytes_count = 0;
assert(0 != cptr);
#if defined(USE_SSL)
switch (client_sendv(cptr, buf, &bytes_count, &bytes_written)) {
#else
switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) {
#endif
case IO_SUCCESS:
ClrFlag(cptr, FLAG_BLOCKED);
cli_sendB(cptr) += bytes_written;
cli_sendB(&me) += bytes_written;
/* A partial write implies that future writes will block. */
if (bytes_written < bytes_count)
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_BLOCKED:
SetFlag(cptr, FLAG_BLOCKED);
break;
case IO_FAILURE:
cli_error(cptr) = errno;
SetFlag(cptr, FLAG_DEADSOCKET);
break;
}
return bytes_written;
}
/** Complete non-blocking connect()-sequence. Check access and
* terminate connection, if trouble detected.
* @param cptr Client to which we have connected, with all ConfItem structs attached.
* @return Zero on failure (caller should exit_client()), non-zero on success.
*/
static int completed_connection(struct Client* cptr)
{
struct ConfItem *aconf;
time_t newts;
struct Client *acptr;
int i;
#if defined(USE_SSL)
char *sslfp;
int r;
#endif
assert(0 != cptr);
/*
* get the socket status from the fd first to check if
* connection actually succeeded
*/
if ((cli_error(cptr) = os_get_sockerr(cli_fd(cptr)))) {
const char* msg = strerror(cli_error(cptr));
if (!msg)
msg = "Unknown error";
sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: %s",
cli_name(cptr), msg);
return 0;
}
if (!(aconf = find_conf_byname(cli_confs(cptr), cli_name(cptr), CONF_SERVER))) {
sendto_opmask(0, SNO_OLDSNO, "Lost Server Line for %s", cli_name(cptr));
return 0;
}
#if defined(USE_SSL)
if (aconf->flags & CONF_SSL) {
r = ssl_connect(&(cli_socket(cptr)));
if (r == -1) {
sendto_opmask(0, SNO_OLDSNO, "Connection failed to %s: SSL error",
cli_name(cptr));
return 0;
} else if (r == 0)
return 1;
sslfp = ssl_get_fingerprint(cli_socket(cptr).s_ssl);
if (sslfp)
ircd_strncpy(cli_sslclifp(cptr), sslfp, BUFSIZE+1);
SetSSL(cptr);
}
#endif
if (s_state(&(cli_socket(cptr))) == SS_CONNECTING)
socket_state(&(cli_socket(cptr)), SS_CONNECTED);
if (!EmptyString(aconf->passwd))
sendrawto_one(cptr, MSG_PASS " :%s", aconf->passwd);
/*
* Create a unique timestamp
*/
newts = TStime();
for (i = HighestFd; i > -1; --i) {
if ((acptr = LocalClientArray[i]) &&
(IsServer(acptr) || IsHandshake(acptr))) {
if (cli_serv(acptr)->timestamp >= newts)
newts = cli_serv(acptr)->timestamp + 1;
}
}
assert(0 != cli_serv(cptr));
cli_serv(cptr)->timestamp = newts;
SetHandshake(cptr);
/*
* Make us timeout after twice the timeout for DNS look ups
*/
cli_lasttime(cptr) = CurrentTime;
ClearPingSent(cptr);
/* TODO: NEGOCIACION
envia_config_req(cptr);
*/
sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s6 :%s",
cli_name(&me), cli_serv(&me)->timestamp, newts,
MAJOR_PROTOCOL, NumServCap(&me),
feature_bool(FEAT_HUB) ? "h" : "", cli_info(&me));
#if defined(DDB)
ddb_burst(cptr);
#endif
return (IsDead(cptr)) ? 0 : 1;
}
/** Close the physical connection. Side effects: MyConnect(cptr)
* becomes false and cptr->from becomes NULL.
* @param cptr Client to disconnect.
*/
void close_connection(struct Client *cptr)
{
struct ConfItem* aconf;
if (IsServer(cptr)) {
ServerStats->is_sv++;
ServerStats->is_sbs += cli_sendB(cptr);
ServerStats->is_sbr += cli_receiveB(cptr);
ServerStats->is_sti += CurrentTime - cli_firsttime(cptr);
/*
* If the connection has been up for a long amount of time, schedule
* a 'quick' reconnect, else reset the next-connect cycle.
*/
if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) {
/*
* Reschedule a faster reconnect, if this was a automatically
* connected configuration entry. (Note that if we have had
* a rehash in between, the status has been changed to
* CONF_ILLEGAL). But only do this if it was a "good" link.
*/
aconf->hold = CurrentTime;
aconf->hold += ((aconf->hold - cli_since(cptr) >
feature_int(FEAT_HANGONGOODLINK)) ?
feature_int(FEAT_HANGONRETRYDELAY) : ConfConFreq(aconf));
/* if (nextconnect > aconf->hold) */
/* nextconnect = aconf->hold; */
}
}
else if (IsUser(cptr)) {
ServerStats->is_cl++;
ServerStats->is_cbs += cli_sendB(cptr);
ServerStats->is_cbr += cli_receiveB(cptr);
ServerStats->is_cti += CurrentTime - cli_firsttime(cptr);
}
else
ServerStats->is_ni++;
#if defined(USE_ZLIB)
/*
* Siempre es una conexion nuestra
*/
if (cli_connect(cptr)->zlib_negociation & ZLIB_IN) {
inflateEnd(cli_connect(cptr)->comp_in);
MyFree(cli_connect(cptr)->comp_in);
}
if (cli_connect(cptr)->zlib_negociation & ZLIB_OUT) {
deflateEnd(cli_connect(cptr)->comp_out);
MyFree(cli_connect(cptr)->comp_out);
}
#endif
if (-1 < cli_fd(cptr)) {
flush_connections(cptr);
LocalClientArray[cli_fd(cptr)] = 0;
close(cli_fd(cptr));
socket_del(&(cli_socket(cptr))); /* queue a socket delete */
cli_fd(cptr) = -1;
cli_freeflag(cptr) &= ~FREEFLAG_SOCKET;
}
SetFlag(cptr, FLAG_DEADSOCKET);
MsgQClear(&(cli_sendQ(cptr)));
client_drop_sendq(cli_connect(cptr));
DBufClear(&(cli_recvQ(cptr)));
memset(cli_passwd(cptr), 0, sizeof(cli_passwd(cptr)));
set_snomask(cptr, 0, SNO_SET);
det_confs_butmask(cptr, 0);
if (cli_listener(cptr)) {
release_listener(cli_listener(cptr));
cli_listener(cptr) = 0;
}
for ( ; HighestFd > 0; --HighestFd) {
if (LocalClientArray[HighestFd])
break;
}
}
/** Close all unregistered connections.
* @param source Oper who requested the close.
* @return Number of closed connections.
*/
int net_close_unregistered_connections(struct Client* source)
{
int i;
struct Client* cptr;
int count = 0;
assert(0 != source);
for (i = HighestFd; i > 0; --i) {
if ((cptr = LocalClientArray[i]) && !IsRegistered(cptr)) {
send_reply(source, RPL_CLOSING, get_client_name(source, HIDE_IP));
exit_client(source, cptr, &me, "Oper Closing");
++count;
}
}
return count;
}
void add_connection(struct Listener* listener, int fd, void *ssl) {
#else
void add_connection(struct Listener* listener, int fd) {
#endif
struct irc_sockaddr addr;
struct Client *new_client;
time_t next_target = 0;
#if defined(USE_SSL)
char *sslfp;
#endif
const char* const throttle_message =
"ERROR :Your host is trying to (re)connect too fast -- throttled\r\n";
/* 12345678901234567890123456789012345679012345678901234567890123456 */
const char* const register_message =
"ERROR :Unable to complete your registration\r\n";
assert(0 != listener);
/*
* Removed preliminary access check. Full check is performed in m_server and
* m_user instead. Also connection time out help to get rid of unwanted
* connections.
*/
if (!os_get_peername(fd, &addr) || !os_set_nonblocking(fd)) {
++ServerStats->is_ref;
#if defined(USE_SSL)
ssl_murder(ssl, fd, NULL);
#else
close(fd);
#endif
return;
}
/*
* Disable IP (*not* TCP) options. In particular, this makes it impossible
* to use source routing to connect to the server. If we didn't do this
* (and if intermediate networks didn't drop source-routed packets), an
* attacker could successfully IP spoof us...and even return the anti-spoof
* ping, because the options would cause the packet to be routed back to
* the spoofer's machine. When we disable the IP options, we delete the
* source route, and the normal routing takes over.
*/
os_disable_options(fd);
if (listener_server(listener))
{
new_client = make_client(0, STAT_UNKNOWN_SERVER);
}
else
{
/*
* Add this local client to the IPcheck registry.
*
* If they're throttled, murder them, but tell them why first.
*/
if (!IPcheck_local_connect(&addr.addr, &next_target))
{
++ServerStats->is_ref;
#if defined(USE_SSL)
ssl_murder(ssl, fd, throttle_message);
#else
write(fd, throttle_message, strlen(throttle_message));
close(fd);
#endif
return;
}
new_client = make_client(0, STAT_UNKNOWN_USER);
SetIPChecked(new_client);
}
/*
* Copy ascii address to 'sockhost' just in case. Then we have something
* valid to put into error messages...
*/
ircd_ntoa_r(cli_sock_ip(new_client), &addr.addr);
strcpy(cli_sockhost(new_client), cli_sock_ip(new_client));
memcpy(&cli_ip(new_client), &addr.addr, sizeof(cli_ip(new_client)));
if (next_target)
cli_nexttarget(new_client) = next_target;
cli_fd(new_client) = fd;
if (!socket_add(&(cli_socket(new_client)), client_sock_callback,
(void*) cli_connect(new_client), SS_CONNECTED, 0, fd)) {
++ServerStats->is_ref;
#if defined(USE_SSL)
ssl_murder(ssl, fd, register_message);
#else
write(fd, register_message, strlen(register_message));
close(fd);
#endif
cli_fd(new_client) = -1;
return;
}
#if defined(USE_SSL)
if (ssl) {
cli_socket(new_client).s_ssl = ssl;
sslfp = ssl_get_fingerprint(ssl);
if (sslfp)
ircd_strncpy(cli_sslclifp(new_client), sslfp, BUFSIZE+1);
}
#endif
cli_freeflag(new_client) |= FREEFLAG_SOCKET;
cli_listener(new_client) = listener;
++listener->ref_count;
Count_newunknown(UserStats);
/* if we've made it this far we can put the client on the auth query pile */
start_auth(new_client);
}
/** Determines whether to tell the events engine we're interested in
* writable events.
* @param cptr Client for which to decide this.
*/
void update_write(struct Client* cptr)
{
/* If there are messages that need to be sent along, or if the client
* is in the middle of a /list, then we need to tell the engine that
* we're interested in writable events--otherwise, we need to drop
* that interest.
*/
socket_events(&(cli_socket(cptr)),
((MsgQLength(&cli_sendQ(cptr)) || cli_listing(cptr)) ?
SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE);
}
/** Read a 'packet' of data from a connection and process it. Read in
* 8k chunks to give a better performance rating (for server
* connections). Do some tricky stuff for client connections to make
* sure they don't do any flooding >:-) -avalon
* @param cptr Client from which to read data.
* @param socket_ready If non-zero, more data can be read from the client's socket.
* @return Positive number on success, zero on connection-fatal failure, negative
* if user is killed.
*/
static int read_packet(struct Client *cptr, int socket_ready)
{
unsigned int dolen = 0;
unsigned int length = 0;
if (socket_ready &&
!(IsUser(cptr) && !IsOper(cptr) &&
DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))) {
switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) {
case IO_SUCCESS:
if (length)
{
cli_lasttime(cptr) = CurrentTime;
ClearPingSent(cptr);
ClrFlag(cptr, FLAG_NONL);
if (cli_lasttime(cptr) > cli_since(cptr))
cli_since(cptr) = cli_lasttime(cptr);
}
break;
case IO_BLOCKED:
break;
case IO_FAILURE:
cli_error(cptr) = errno;
/* SetFlag(cptr, FLAG_DEADSOCKET); */
return 0;
}
}
/*
* For server connections, we process as many as we can without
* worrying about the time of day or anything :)
*/
if (length > 0 && IsServer(cptr))
return server_dopacket(cptr, readbuf, length);
else if (length > 0 && (IsHandshake(cptr) || IsConnecting(cptr)))
return connect_dopacket(cptr, readbuf, length);
else
{
/*
* Before we even think of parsing what we just read, stick
* it on the end of the receive queue and do it when its
* turn comes around.
*/
if (length > 0 && dbuf_put(&(cli_recvQ(cptr)), readbuf, length) == 0)
return exit_client(cptr, cptr, &me, "dbuf_put fail");
if (IsUser(cptr)) {
if (DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD)
&& !IsOper(cptr))
return exit_client(cptr, cptr, &me, "Excess Flood");
}
while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
(IsTrusted(cptr) || cli_since(cptr) - CurrentTime < 10))
{
dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE);
/*
* Devious looking...whats it do ? well..if a client
* sends a *long* message without any CR or LF, then
* dbuf_getmsg fails and we pull it out using this
* loop which just gets the next 512 bytes and then
* deletes the rest of the buffer contents.
* -avalon
*/
if (dolen == 0)
{
if (DBufLength(&(cli_recvQ(cptr))) < 510)
SetFlag(cptr, FLAG_NONL);
else
{
/* More than 512 bytes in the line - drop the input and yell
* at the client.
*/
DBufClear(&(cli_recvQ(cptr)));
send_reply(cptr, ERR_INPUTTOOLONG);
}
}
else if (client_dopacket(cptr, dolen) == CPTR_KILLED)
return CPTR_KILLED;
/*
* If it has become registered as a Server
* then skip the per-message parsing below.
*/
if (IsHandshake(cptr) || IsServer(cptr))
{
while (-1)
{
dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf));
if (dolen <= 0)
return 1;
else if (dolen == 0)
{
if (DBufLength(&(cli_recvQ(cptr))) < 510)
SetFlag(cptr, FLAG_NONL);
else
DBufClear(&(cli_recvQ(cptr)));
}
else if ((IsServer(cptr) &&
server_dopacket(cptr, readbuf, dolen) == CPTR_KILLED) ||
(!IsServer(cptr) &&
connect_dopacket(cptr, readbuf, dolen) == CPTR_KILLED))
return CPTR_KILLED;
}
}
}
/* If there's still data to process, wait 2 seconds first */
if (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) &&
!t_onqueue(&(cli_proc(cptr))))
{
Debug((DEBUG_LIST, "Adding client process timer for %C", cptr));
cli_freeflag(cptr) |= FREEFLAG_TIMER;
timer_add(&(cli_proc(cptr)), client_timer_callback, cli_connect(cptr),
TT_RELATIVE, 2);
}
}
return 1;
}
/*
* start_auth_query - Flag the client to show that an attempt to
* contact the ident server on the client's host. The connect and
* subsequently the socket are all put into 'non-blocking' mode.
* Should the connect or any later phase of the identifing process fail,
* it is aborted and the user is given a username of "unknown".
*/
static int start_auth_query(struct AuthRequest* auth)
{
struct sockaddr_in remote_addr;
struct sockaddr_in local_addr;
int fd;
IOResult result;
assert(0 != auth);
assert(0 != auth->client);
if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
++ServerStats->is_abad;
return 0;
}
if ((MAXCONNECTIONS - 10) < fd) {
close(fd);
return 0;
}
if (!os_set_nonblocking(fd)) {
close(fd);
return 0;
}
if (IsUserPort(auth->client))
sendheader(auth->client, REPORT_DO_ID);
/*
* get the local address of the client and bind to that to
* make the auth request. This used to be done only for
* ifdef VIRTTUAL_HOST, but needs to be done for all clients
* since the ident request must originate from that same address--
* and machines with multiple IP addresses are common now
*/
memset(&local_addr, 0, sizeof(struct sockaddr_in));
os_get_sockname(cli_fd(auth->client), &local_addr);
local_addr.sin_port = htons(0);
if (bind(fd, (struct sockaddr*) &local_addr, sizeof(struct sockaddr_in))) {
close(fd);
return 0;
}
remote_addr.sin_addr.s_addr = (cli_ip(auth->client)).s_addr;
remote_addr.sin_port = htons(113);
remote_addr.sin_family = AF_INET;
if ((result = os_connect_nonb(fd, &remote_addr)) == IO_FAILURE ||
!socket_add(&auth->socket, auth_sock_callback, (void*) auth,
result == IO_SUCCESS ? SS_CONNECTED : SS_CONNECTING,
SOCK_EVENT_READABLE, fd)) {
ServerStats->is_abad++;
/*
* No error report from this...
*/
close(fd);
if (IsUserPort(auth->client))
sendheader(auth->client, REPORT_FAIL_ID);
return 0;
}
auth->flags |= AM_SOCKET;
auth->fd = fd;
SetAuthConnect(auth);
if (result == IO_SUCCESS)
send_auth_query(auth); /* this does a SetAuthPending(auth) for us */
return 1;
}
/** Run the daemon.
* @param[in] argc Number of arguments in \a argv.
* @param[in] argv Arguments to program execution.
*/
int main(int argc, char **argv) {
CurrentTime = time(NULL);
thisServer.argc = argc;
thisServer.argv = argv;
thisServer.uid = getuid();
thisServer.euid = geteuid();
#ifdef MDEBUG
mem_dbg_initialise();
#endif
#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_CORE)
set_core_limit();
#endif
umask(077); /* better safe than sorry --SRB */
memset(&me, 0, sizeof(me));
memset(&me_con, 0, sizeof(me_con));
cli_connect(&me) = &me_con;
cli_fd(&me) = -1;
parse_command_line(argc, argv);
if (chdir(dpath)) {
fprintf(stderr, "Fail: Cannot chdir(%s): %s, check DPATH\n", dpath, strerror(errno));
return 2;
}
if (!set_userid_if_needed())
return 3;
/* Check paths for accessibility */
if (!check_file_access(SPATH, 'S', X_OK) ||
!check_file_access(configfile, 'C', R_OK))
return 4;
if (!init_connection_limits())
return 9;
close_connections(!(thisServer.bootopt & (BOOT_DEBUG | BOOT_TTY | BOOT_CHKCONF)));
/* daemon_init() must be before event_init() because kqueue() FDs
* are, perversely, not inherited across fork().
*/
daemon_init(thisServer.bootopt & BOOT_TTY);
#ifdef DEBUGMODE
/* Must reserve fd 2... */
if (debuglevel >= 0 && !(thisServer.bootopt & BOOT_TTY)) {
int fd;
if ((fd = open("/dev/null", O_WRONLY)) < 0) {
fprintf(stderr, "Unable to open /dev/null (to reserve fd 2): %s\n",
strerror(errno));
return 8;
}
if (fd != 2 && dup2(fd, 2) < 0) {
fprintf(stderr, "Unable to reserve fd 2; dup2 said: %s\n",
strerror(errno));
return 8;
}
}
#endif
event_init(MAXCONNECTIONS);
setup_signals();
feature_init(); /* initialize features... */
log_init(*argv);
set_nomem_handler(outofmemory);
initload();
init_list();
init_hash();
init_class();
initwhowas();
initmsgtree();
initstats();
/* we need this for now, when we're modular this
should be removed -- hikari */
ircd_crypt_init();
motd_init();
if (!init_conf()) {
log_write(LS_SYSTEM, L_CRIT, 0, "Failed to read configuration file %s",
configfile);
return 7;
}
if (thisServer.bootopt & BOOT_CHKCONF) {
if (dbg_client)
conf_debug_iline(dbg_client);
fprintf(stderr, "Configuration file %s checked okay.\n", configfile);
return 0;
}
debug_init(thisServer.bootopt & BOOT_TTY);
if (check_pid()) {
Debug((DEBUG_FATAL, "Failed to acquire PID file lock after fork"));
exit(2);
}
init_server_identity();
uping_init();
stats_init();
IPcheck_init();
timer_add(timer_init(&connect_timer), try_connections, 0, TT_RELATIVE, 1);
timer_add(timer_init(&ping_timer), check_pings, 0, TT_RELATIVE, 1);
timer_add(timer_init(&destruct_event_timer), exec_expired_destruct_events, 0, TT_PERIODIC, 60);
timer_add(timer_init(&mute_timer), check_expired_mutes, 0, TT_PERIODIC, 30);
CurrentTime = time(NULL);
SetMe(&me);
cli_magic(&me) = CLIENT_MAGIC;
cli_from(&me) = &me;
make_server(&me);
cli_serv(&me)->timestamp = TStime(); /* Abuse own link timestamp as start TS */
cli_serv(&me)->prot = atoi(MAJOR_PROTOCOL);
cli_serv(&me)->up = &me;
cli_serv(&me)->down = NULL;
cli_handler(&me) = SERVER_HANDLER;
SetYXXCapacity(&me, MAXCLIENTS);
cli_lasttime(&me) = cli_since(&me) = cli_firsttime(&me) = CurrentTime;
hAddClient(&me);
write_pidfile();
init_counters();
Debug((DEBUG_NOTICE, "Server ready..."));
log_write(LS_SYSTEM, L_NOTICE, 0, "Server Ready");
event_loop();
return 0;
}
