X-Git-Url: http://git.pk910.de/?a=blobdiff_plain;f=ircd%2Fs_bsd.c;h=5fd6d9193eb1ed0e1d55fd2727754abfcb05ee4a;hb=7fbfc390d32f9acc3192d011b813f66f35370faa;hp=e2b4bdfaed65ecfb4a2ba14dc23b7c0a107a4f88;hpb=54bdac32d1b9d5418ec05c2c41871ef46cc3427a;p=ircu2.10.12-pk.git diff --git a/ircd/s_bsd.c b/ircd/s_bsd.c index e2b4bdf..5fd6d91 100644 --- a/ircd/s_bsd.c +++ b/ircd/s_bsd.c @@ -16,8 +16,10 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * $Id$ + */ +/** @file + * @brief Functions that now (or in the past) relied on BSD APIs. + * @version $Id$ */ #include "config.h" @@ -27,6 +29,7 @@ #include "channel.h" #include "class.h" #include "hash.h" +#include "ircd_alloc.h" #include "ircd_log.h" #include "ircd_features.h" #include "ircd_osdep.h" @@ -50,19 +53,16 @@ #include "s_misc.h" #include "s_user.h" #include "send.h" +#include "ssl.h" #include "struct.h" -#include "support.h" #include "sys.h" #include "uping.h" #include "version.h" -#include -#include -#include +/* #include -- Now using assert in ircd_log.h */ #include #include #include -#include #include #include #include @@ -72,17 +72,15 @@ #include #include -#ifdef USE_POLL -#include -#endif /* USE_POLL */ - -#ifndef INADDR_NONE -#define INADDR_NONE 0xffffffff -#endif - +/** Array of my own clients, indexed by file descriptor. */ struct Client* LocalClientArray[MAXCONNECTIONS]; +/** Maximum file descriptor in current use. */ int HighestFd = -1; -struct sockaddr_in VirtualHost; +/** Default local address for outbound IPv4 connections. */ +struct irc_sockaddr VirtualHost_v4; +/** Default local address for outbound IPv6 connections. */ +struct irc_sockaddr VirtualHost_v6; +/** Temporary buffer for reading data from a peer. */ static char readbuf[SERVER_TCP_WINDOW]; /* @@ -107,24 +105,6 @@ const char* const TOS_ERROR_MSG = "error setting TOS for %s: %s"; static void client_sock_callback(struct Event* ev); static void client_timer_callback(struct Event* ev); -#if !defined(USE_POLL) -#if FD_SETSIZE < (MAXCONNECTIONS + 4) -/* - * Sanity check - * - * All operating systems work when MAXCONNECTIONS <= 252. - * Most operating systems work when MAXCONNECTIONS <= 1020 and FD_SETSIZE is - * updated correctly in the system headers (on BSD systems our sys.h has - * defined FD_SETSIZE to MAXCONNECTIONS+4 before including the system's headers - * but sys/types.h might have abruptly redefined it so the check is still - * done), you might already need to recompile your kernel. - * For larger FD_SETSIZE your milage may vary (kernel patches may be needed). - * The check is _NOT_ done if we will not use FD_SETS at all (USE_POLL) - */ -#error "FD_SETSIZE is too small or MAXCONNECTIONS too large." -#endif -#endif - /* * Cannot use perror() within daemon. stderr is closed in @@ -132,19 +112,14 @@ static void client_timer_callback(struct Event* ev); * been reassigned to a normal connection... */ -/* - * report_error - * - * This a replacement for perror(). Record error to log and - * also send a copy to all *LOCAL* opers online. - * - * text is a *format* string for outputting error. It must - * contain only two '%s', the first will be replaced - * by the sockhost from the cptr, and the latter will - * be taken from sys_errlist[errno]. - * - * cptr if not NULL, is the *LOCAL* client associated with - * the error. +/** Replacement for perror(). Record error to log. Send a copy to all + * *LOCAL* opers, but only if no errors were sent to them in the last + * 20 seconds. + * @param text A *format* string for outputting error. It must contain + * only two '%s', the first will be replaced by the sockhost from the + * cptr, and the latter will be taken from sys_errlist[errno]. + * @param who The client associated with the error. + * @param err The errno value to display. */ void report_error(const char* text, const char* who, int err) { @@ -158,57 +133,49 @@ void report_error(const char* text, const char* who, int err) if (EmptyString(who)) who = "unknown"; - if (last_notice + 20 < CurrentTime) { - /* - * pace error messages so opers don't get flooded by transients - */ - sendto_opmask_butone(0, SNO_OLDSNO, text, who, errmsg); - last_notice = CurrentTime; - } + sendto_opmask_butone_ratelimited(0, SNO_OLDSNO, &last_notice, text, who, errmsg); log_write(LS_SOCKET, L_ERROR, 0, text, who, errmsg); errno = errtmp; } -/* - * connect_dns_callback - called when resolver query finishes - * if the query resulted in a successful search, reply will contain - * a non-null pointer, otherwise reply will be null. - * if successful start the connection, otherwise notify opers +/** Called when resolver query finishes. If the DNS lookup was + * successful, start the connection; otherwise notify opers of the + * failure. + * @param vptr The struct ConfItem representing the Connect block. + * @param hp A pointer to the DNS lookup results (NULL on failure). */ -static void connect_dns_callback(void* vptr, struct DNSReply* reply) +static void connect_dns_callback(void* vptr, const struct irc_in_addr *addr, const char *h_name) { struct ConfItem* aconf = (struct ConfItem*) vptr; + assert(aconf); aconf->dns_pending = 0; - if (reply) { - memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr)); - connect_server(aconf, 0, reply); + if (addr) { + memcpy(&aconf->address, addr, sizeof(aconf->address)); + connect_server(aconf, 0); } else sendto_opmask_butone(0, SNO_OLDSNO, "Connect to %s failed: host lookup", aconf->name); } -/* - * close_connections - closes all connections - * close stderr if specified +/** Closes all file descriptors. + * @param close_stderr If non-zero, also close stderr. */ void close_connections(int close_stderr) { int i; -#if 0 - close(0); - close(1); if (close_stderr) + { + close(0); + close(1); close(2); -#endif + } for (i = 3; i < MAXCONNECTIONS; ++i) close(i); } -/* - * init_connection_limits - initialize process fd limit to - * MAXCONNECTIONS +/** Initialize process fd limit to MAXCONNECTIONS. */ int init_connection_limits(void) { @@ -216,7 +183,7 @@ int init_connection_limits(void) if (0 == limit) return 1; if (limit < 0) { - fprintf(stderr, "error setting max fd's to %d\n", limit); + fprintf(stderr, "error setting max fds to %d: %s\n", limit, strerror(errno)); } else if (limit > 0) { fprintf(stderr, "ircd fd table too big\nHard Limit: %d IRC max: %d\n", @@ -226,70 +193,43 @@ int init_connection_limits(void) return 0; } -/* - * connect_inet - set up address and port and make a connection +/** 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) { - static struct sockaddr_in sin; + 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. */ - cli_fd(cptr) = socket(AF_INET, SOCK_STREAM, 0); - if (-1 == cli_fd(cptr)) { - cli_error(cptr) = errno; - report_error(SOCKET_ERROR_MSG, cli_name(cptr), errno); - return 0; - } - if (cli_fd(cptr) >= MAXCLIENTS) { - report_error(CONNLIMIT_ERROR_MSG, cli_name(cptr), 0); - close(cli_fd(cptr)); - cli_fd(cptr) = -1; - return 0; - } - /* - * Bind to a local IP# (with unknown port - let unix decide) so - * we have some chance of knowing the IP# that gets used for a host - * with more than one IP#. - * - * No we don't bind it, not all OS's can handle connecting with - * an already bound socket, different ip# might occur anyway - * leading to a freezing select() on this side for some time. - * I had this on my Linux 1.1.88 --Run - */ - - /* - * No, we do bind it if we have virtual host support. If we don't - * explicitly bind it, it will default to IN_ADDR_ANY and we lose - * due to the other server not allowing our base IP --smg - */ - if (feature_bool(FEAT_VIRTUAL_HOST) && - bind(cli_fd(cptr), (struct sockaddr*) &VirtualHost, - sizeof(VirtualHost))) { - report_error(BIND_ERROR_MSG, cli_name(cptr), errno); - close(cli_fd(cptr)); - cli_fd(cptr) = -1; + 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; - } - memset(&sin, 0, sizeof(sin)); - sin.sin_family = AF_INET; - sin.sin_addr.s_addr = aconf->ipnum.s_addr; - sin.sin_port = htons(aconf->port); /* * save connection info in client */ - (cli_ip(cptr)).s_addr = aconf->ipnum.s_addr; - cli_port(cptr) = aconf->port; - ircd_ntoa_r(cli_sock_ip(cptr), (const char*) &(cli_ip(cptr))); + 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), SERVER_TCP_WINDOW)) { + 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)); @@ -297,22 +237,19 @@ static int connect_inet(struct ConfItem* aconf, struct Client* cptr) return 0; } /* - * ALWAYS set sockets non-blocking + * Set the TOS bits - this is nonfatal if it doesn't stick. */ - if (!os_set_nonblocking(cli_fd(cptr))) { - cli_error(cptr) = errno; - report_error(NONB_ERROR_MSG, cli_name(cptr), errno); - close(cli_fd(cptr)); - cli_fd(cptr) = -1; - return 0; + 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), &sin)) == IO_FAILURE) { + 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, @@ -323,94 +260,73 @@ static int connect_inet(struct ConfItem* aconf, struct Client* cptr) cli_fd(cptr) = -1; return 0; } + + if(aconf->usessl) { + struct SSLConnection *ssl = ssl_create_connect(cli_fd(cptr), cptr, SSLData_Client); + cli_connect(cptr)->con_ssl = ssl; + if(ssl_handshake(ssl)) { + unsigned int events = 0; + if(ssl_wantread(ssl)) + events |= SOCK_EVENT_READABLE; + if(ssl_wantwrite(ssl)) + events |= SOCK_EVENT_WRITABLE; + socket_events(&(cli_socket(cptr)), SOCK_ACTION_SET | events); + result = IO_BLOCKED; + } + } + cli_freeflag(cptr) |= FREEFLAG_SOCKET; return 1; } -/* - * deliver_it - * Attempt to send a sequence of bytes to the connection. - * Returns - * - * < 0 Some fatal error occurred, (but not EWOULDBLOCK). - * This return is a request to close the socket and - * clean up the link. - * - * >= 0 No real error occurred, returns the number of - * bytes actually transferred. EWOULDBLOCK and other - * possibly similar conditions should be mapped to - * zero return. Upper level routine will have to - * decide what to do with those unwritten bytes... - * - * *NOTE* alarm calls have been preserved, so this should - * work equally well whether blocking or non-blocking - * mode is used... - * - * We don't use blocking anymore, that is impossible with the - * net.loads today anyway. Commented out the alarms to save cpu. - * --Run +/** 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; + IOResult result; assert(0 != cptr); - switch (os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written)) { + if(cli_connect(cptr)->con_ssl) { + result = ssl_send_encrypt(cli_connect(cptr)->con_ssl, buf, &bytes_count, &bytes_written); + } else { + result = os_sendv_nonb(cli_fd(cptr), buf, &bytes_count, &bytes_written); + } + + switch (result) { case IO_SUCCESS: - cli_flags(cptr) &= ~FLAGS_BLOCKED; + ClrFlag(cptr, FLAG_BLOCKED); cli_sendB(cptr) += bytes_written; cli_sendB(&me) += bytes_written; - if (cli_sendB(cptr) > 1023) { - cli_sendK(cptr) += (cli_sendB(cptr) >> 10); - cli_sendB(cptr) &= 0x03ff; /* 2^10 = 1024, 3ff = 1023 */ - } - if (cli_sendB(&me) > 1023) { - cli_sendK(&me) += (cli_sendB(&me) >> 10); - cli_sendB(&me) &= 0x03ff; - } - /* - * XXX - hrmm.. set blocked here? the socket didn't - * say it was blocked - */ + /* A partial write implies that future writes will block. */ if (bytes_written < bytes_count) - cli_flags(cptr) |= FLAGS_BLOCKED; + SetFlag(cptr, FLAG_BLOCKED); break; case IO_BLOCKED: - cli_flags(cptr) |= FLAGS_BLOCKED; + SetFlag(cptr, FLAG_BLOCKED); break; case IO_FAILURE: cli_error(cptr) = errno; - cli_flags(cptr) |= FLAGS_DEADSOCKET; + SetFlag(cptr, FLAG_DEADSOCKET); break; } return bytes_written; } - -void release_dns_reply(struct Client* cptr) -{ - assert(0 != cptr); - assert(MyConnect(cptr)); - - if (cli_dns_reply(cptr)) { - assert(0 < cli_dns_reply(cptr)->ref_count); - --(cli_dns_reply(cptr))->ref_count; - cli_dns_reply(cptr) = 0; - } -} - -/* - * completed_connection - * - * Complete non-blocking connect()-sequence. Check access and +/** Complete non-blocking connect()-sequence. Check access and * terminate connection, if trouble detected. - * - * Return TRUE, if successfully completed - * FALSE, if failed and ClientExit + * @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) +int completed_connection(struct Client* cptr) { struct ConfItem *aconf; time_t newts; @@ -460,9 +376,9 @@ static int completed_connection(struct Client* cptr) * Make us timeout after twice the timeout for DNS look ups */ cli_lasttime(cptr) = CurrentTime; - cli_flags(cptr) |= FLAGS_PINGSENT; + ClearPingSent(cptr); - sendrawto_one(cptr, MSG_SERVER " %s 1 %Tu %Tu J%s %s%s +%s :%s", + 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)); @@ -470,11 +386,9 @@ static int completed_connection(struct Client* cptr) return (IsDead(cptr)) ? 0 : 1; } -/* - * close_connection - * - * Close the physical connection. This function must make - * MyConnect(cptr) == FALSE, and set cptr->from == NULL. +/** 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) { @@ -484,24 +398,14 @@ void close_connection(struct Client *cptr) ServerStats->is_sv++; ServerStats->is_sbs += cli_sendB(cptr); ServerStats->is_sbr += cli_receiveB(cptr); - ServerStats->is_sks += cli_sendK(cptr); - ServerStats->is_skr += cli_receiveK(cptr); ServerStats->is_sti += CurrentTime - cli_firsttime(cptr); - if (ServerStats->is_sbs > 1023) { - ServerStats->is_sks += (ServerStats->is_sbs >> 10); - ServerStats->is_sbs &= 0x3ff; - } - if (ServerStats->is_sbr > 1023) { - ServerStats->is_skr += (ServerStats->is_sbr >> 10); - ServerStats->is_sbr &= 0x3ff; - } /* * 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), 0, cli_sockhost(cptr), CONF_SERVER))) { + if ((aconf = find_conf_exact(cli_name(cptr), cptr, CONF_SERVER))) { /* - * Reschedule a faster reconnect, if this was a automaticly + * 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. @@ -518,21 +422,16 @@ void close_connection(struct Client *cptr) ServerStats->is_cl++; ServerStats->is_cbs += cli_sendB(cptr); ServerStats->is_cbr += cli_receiveB(cptr); - ServerStats->is_cks += cli_sendK(cptr); - ServerStats->is_ckr += cli_receiveK(cptr); ServerStats->is_cti += CurrentTime - cli_firsttime(cptr); - if (ServerStats->is_cbs > 1023) { - ServerStats->is_cks += (ServerStats->is_cbs >> 10); - ServerStats->is_cbs &= 0x3ff; - } - if (ServerStats->is_cbr > 1023) { - ServerStats->is_ckr += (ServerStats->is_cbr >> 10); - ServerStats->is_cbr &= 0x3ff; - } } else ServerStats->is_ni++; + if(cli_connect(cptr)->con_ssl) { + ssl_free_connection(cli_connect(cptr)->con_ssl); + cli_connect(cptr)->con_ssl = NULL; + } + if (-1 < cli_fd(cptr)) { flush_connections(cptr); LocalClientArray[cli_fd(cptr)] = 0; @@ -540,7 +439,7 @@ void close_connection(struct Client *cptr) socket_del(&(cli_socket(cptr))); /* queue a socket delete */ cli_fd(cptr) = -1; } - cli_flags(cptr) |= FLAGS_DEADSOCKET; + SetFlag(cptr, FLAG_DEADSOCKET); MsgQClear(&(cli_sendQ(cptr))); client_drop_sendq(cli_connect(cptr)); @@ -561,6 +460,10 @@ void close_connection(struct Client *cptr) } } +/** 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; @@ -578,16 +481,15 @@ int net_close_unregistered_connections(struct Client* source) return count; } -/*---------------------------------------------------------------------------- - * add_connection - * - * Creates a client which has just connected to us on the given fd. +/** Creates a client which has just connected to us on the given fd. * The sockhost field is initialized with the ip# of the host. * The client is not added to the linked list of clients, it is * passed off to the auth handler for dns and ident queries. - *--------------------------------------------------------------------------*/ + * @param listener Listening socket that received the connection. + * @param fd File descriptor of new connection. + */ void add_connection(struct Listener* listener, int fd) { - struct sockaddr_in addr; + struct irc_sockaddr addr; struct Client *new_client; time_t next_target = 0; @@ -596,14 +498,13 @@ void add_connection(struct Listener* listener, int fd) { /* 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. + * connections. */ if (!os_get_peername(fd, &addr) || !os_set_nonblocking(fd)) { ++ServerStats->is_ref; @@ -621,31 +522,35 @@ void add_connection(struct Listener* listener, int fd) { */ os_disable_options(fd); - /* - * Add this local client to the IPcheck registry. - * - * If they're throttled, murder them, but tell them why first. - */ - if (!IPcheck_local_connect(addr.sin_addr, &next_target) && !listener->server) + if (listener_server(listener)) { - ++ServerStats->is_ref; - write(fd, throttle_message, strlen(throttle_message)); - close(fd); - return; + 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; + write(fd, throttle_message, strlen(throttle_message)); + close(fd); + return; + } + new_client = make_client(0, STAT_UNKNOWN_USER); + SetIPChecked(new_client); } - - new_client = make_client(0, ((listener->server) ? - STAT_UNKNOWN_SERVER : STAT_UNKNOWN_USER)); /* * Copy ascii address to 'sockhost' just in case. Then we have something - * valid to put into error messages... + * valid to put into error messages... */ - SetIPChecked(new_client); - ircd_ntoa_r(cli_sock_ip(new_client), (const char*) &addr.sin_addr); + ircd_ntoa_r(cli_sock_ip(new_client), &addr.addr); strcpy(cli_sockhost(new_client), cli_sock_ip(new_client)); - (cli_ip(new_client)).s_addr = addr.sin_addr.s_addr; - cli_port(new_client) = ntohs(addr.sin_port); + memcpy(&cli_ip(new_client), &addr.addr, sizeof(cli_ip(new_client))); if (next_target) cli_nexttarget(new_client) = next_target; @@ -664,15 +569,25 @@ void add_connection(struct Listener* listener, int fd) { ++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); + + if(listener_ssl(listener)) { + struct Connection* con = cli_connect(new_client); + con->con_ssl = ssl_start_handshake_listener(listener->ssl_listener, fd, new_client, SSLData_Client); + unsigned int events = 0; + if(ssl_wantread(con->con_ssl)) + events |= SOCK_EVENT_READABLE; + if(ssl_wantwrite(con->con_ssl)) + events |= SOCK_EVENT_WRITABLE; + socket_events(&(cli_socket(new_client)), SOCK_ACTION_SET | events); + } else { + /* if we've made it this far we can put the client on the auth query pile */ + start_auth(new_client); + } } -/* - * update_write - * - * Determines whether to tell the events engine we're interested in - * writable events +/** 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) { @@ -686,13 +601,14 @@ void update_write(struct Client* cptr) SOCK_ACTION_ADD : SOCK_ACTION_DEL) | SOCK_EVENT_WRITABLE); } -/* - * read_packet - * - * 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 +/** 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) { @@ -702,41 +618,52 @@ static int read_packet(struct Client *cptr, int socket_ready) if (socket_ready && !(IsUser(cptr) && DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD))) { - switch (os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length)) { + + /* Handle SSL Sockets + */ + int recvret; + if(cli_connect(cptr)->con_ssl) { + recvret = ssl_recv_decrypt(cli_connect(cptr)->con_ssl, readbuf, sizeof(readbuf), &length); + } else { + recvret = os_recv_nonb(cli_fd(cptr), readbuf, sizeof(readbuf), &length); + } + switch (recvret) { case IO_SUCCESS: - if (length) { + 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); - cli_flags(cptr) &= ~(FLAGS_PINGSENT | FLAGS_NONL); } break; case IO_BLOCKED: break; case IO_FAILURE: cli_error(cptr) = errno; - /* cptr->flags |= FLAGS_DEADSOCKET; */ + /* 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) || IsHandshake(cptr) || IsConnecting(cptr))) { + if (length > 0 && IsServer(cptr)) return server_dopacket(cptr, readbuf, length); - } - else { + 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 && 0 == dbuf_put(&(cli_recvQ(cptr)), readbuf, length)) { + if (length > 0 && dbuf_put(&(cli_recvQ(cptr)), readbuf, length) == 0) return exit_client(cptr, cptr, &me, "dbuf_put fail"); - } if (DBufLength(&(cli_recvQ(cptr))) > feature_int(FEAT_CLIENT_FLOOD)) return exit_client(cptr, cptr, &me, "Excess Flood"); @@ -744,14 +671,6 @@ static int read_packet(struct Client *cptr, int socket_ready) while (DBufLength(&(cli_recvQ(cptr))) && !NoNewLine(cptr) && (IsTrusted(cptr) || cli_since(cptr) - CurrentTime < 10)) { - /* - * If it has become registered as a Server - * then skip the per-message parsing below. - */ - if (IsServer(cptr)) { - dolen = dbuf_get(&(cli_recvQ(cptr)), readbuf, sizeof(readbuf)); - return (dolen) ? server_dopacket(cptr, readbuf, dolen) : 1; - } dolen = dbuf_getmsg(&(cli_recvQ(cptr)), cli_buffer(cptr), BUFSIZE); /* * Devious looking...whats it do ? well..if a client @@ -761,19 +680,52 @@ static int read_packet(struct Client *cptr, int socket_ready) * deletes the rest of the buffer contents. * -avalon */ - if (0 == dolen) { + if (dolen == 0) + { if (DBufLength(&(cli_recvQ(cptr))) < 510) - cli_flags(cptr) |= FLAGS_NONL; + 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 (CPTR_KILLED == client_dopacket(cptr, dolen)) + 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)))) { + !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), @@ -783,21 +735,12 @@ static int read_packet(struct Client *cptr, int socket_ready) return 1; } -/* - * connect_server - start or complete a connection to another server - * returns true (1) if successful, false (0) otherwise - * - * aconf must point to a valid C:line - * m_connect calls this with a valid by client and a null reply - * try_connections calls this with a null by client, and a null reply - * connect_dns_callback call this with a null by client, and a valid reply - * - * XXX - if this comes from an m_connect message and a dns query needs to - * be done, we loose the information about who started the connection and - * it's considered an auto connect. +/** 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 DNSReply* reply) +int connect_server(struct ConfItem* aconf, struct Client* by) { struct Client* cptr = 0; assert(0 != aconf); @@ -808,7 +751,7 @@ int connect_server(struct ConfItem* aconf, struct Client* by, return 0; } Debug((DEBUG_NOTICE, "Connect to %s[@%s]", aconf->name, - ircd_ntoa((const char*) &aconf->ipnum))); + ircd_ntoa(&aconf->address.addr))); if ((cptr = FindClient(aconf->name))) { if (IsServer(cptr) || IsMe(cptr)) { @@ -829,33 +772,19 @@ int connect_server(struct ConfItem* aconf, struct Client* by, } } /* - * If we dont know the IP# for this host and itis a hostname and + * 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 (INADDR_NONE == aconf->ipnum.s_addr) { + if (!irc_in_addr_valid(&aconf->address.addr) + && !ircd_aton(&aconf->address.addr, aconf->host)) { char buf[HOSTLEN + 1]; - assert(0 == reply); - if (INADDR_NONE == (aconf->ipnum.s_addr = inet_addr(aconf->host))) { - struct DNSQuery query; - - query.vptr = aconf; - query.callback = connect_dns_callback; - host_from_uh(buf, aconf->host, HOSTLEN); - buf[HOSTLEN] = '\0'; - reply = gethost_byname(buf, &query); - - if (!reply) { - aconf->dns_pending = 1; - return 0; - } - memcpy(&aconf->ipnum, reply->hp->h_addr, sizeof(struct in_addr)); - } + 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); - if (reply) - ++reply->ref_count; - cli_dns_reply(cptr) = reply; /* * Copy these in so we have something for error detection. @@ -871,10 +800,10 @@ int connect_server(struct ConfItem* aconf, struct Client* by, 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 C-line", aconf->name); + "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 " - "C-line", by, aconf->name); + "Connect block", by, aconf->name); } det_confs_butmask(cptr, 0); free_client(cptr); @@ -917,7 +846,6 @@ int connect_server(struct ConfItem* aconf, struct Client* by, if (cli_fd(cptr) > HighestFd) HighestFd = cli_fd(cptr); - LocalClientArray[cli_fd(cptr)] = cptr; Count_newunknown(UserStats); @@ -933,18 +861,7 @@ int connect_server(struct ConfItem* aconf, struct Client* by, completed_connection(cptr) : 1; } -/* - * Setup local socket structure to use for binding to. - */ -void set_virtual_host(struct in_addr addr) -{ - memset(&VirtualHost, 0, sizeof(VirtualHost)); - VirtualHost.sin_family = AF_INET; - VirtualHost.sin_addr.s_addr = addr.s_addr; -} - -/* - * Find the real hostname for the host running the server (or one which +/** 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. */ @@ -957,8 +874,9 @@ void init_server_identity(void) SetYXXServerName(&me, conf->numeric); } -/* - * Process events on a client socket +/** 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) { @@ -970,7 +888,7 @@ static void client_sock_callback(struct Event* ev) assert(0 != ev_socket(ev)); assert(0 != s_data(ev_socket(ev))); - con = s_data(ev_socket(ev)); + con = (struct Connection*) s_data(ev_socket(ev)); assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY); @@ -987,22 +905,35 @@ static void client_sock_callback(struct Event* ev) break; case ET_CONNECT: /* socket connection completed */ - if (!completed_connection(cptr) || IsDead(cptr)) + if(cli_connect(cptr)->con_ssl) { + ssl_start_handshake_connect(cli_connect(cptr)->con_ssl); + } + else 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_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))); - cli_flags(cptr) |= FLAGS_DEADSOCKET; + 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); @@ -1014,9 +945,9 @@ static void client_sock_callback(struct Event* ev) break; case ET_WRITE: /* socket is writable */ - cli_flags(cptr) &= ~FLAGS_BLOCKED; + ClrFlag(cptr, FLAG_BLOCKED); if (cli_listing(cptr) && MsgQLength(&(cli_sendQ(cptr))) < 2048) - list_next_channels(cptr, 64); + list_next_channels(cptr); Debug((DEBUG_SEND, "Sending queued data to %C", cptr)); send_queued(cptr); break; @@ -1030,9 +961,7 @@ static void client_sock_callback(struct Event* ev) break; default: -#ifndef NDEBUG - abort(); /* unrecognized event */ -#endif + assert(0 && "Unrecognized socket event in client_sock_callback()"); break; } @@ -1046,8 +975,9 @@ static void client_sock_callback(struct Event* ev) } } -/* - * Process a timer on client socket +/** 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) { @@ -1058,7 +988,7 @@ static void client_timer_callback(struct Event* ev) assert(0 != t_data(ev_timer(ev))); assert(ET_DESTROY == ev_type(ev) || ET_EXPIRE == ev_type(ev)); - con = t_data(ev_timer(ev)); + con = (struct Connection*) t_data(ev_timer(ev)); assert(0 != con_client(con) || ev_type(ev) == ET_DESTROY);