terom@18: #include "irc_conn.h"
terom@21: #include "irc_cmd.h"
terom@39: #include "irc_proto.h"
terom@22: #include "log.h"
terom@18: 
terom@18: #include <stdlib.h>
terom@18: #include <string.h>
terom@18: 
terom@37: /**
terom@45:  * Handle an async error on this IRC connection that we could not recover from any other way, the protocol is now dead,
terom@45:  * and should be considered as destroyed after this returns.
terom@45:  *
terom@45:  * For conveniance, this returns the ERROR_CODE
terom@21:  */
terom@45: static err_t irc_conn_set_error (struct irc_conn *conn, struct error_info *err)
terom@45: {
terom@45:     // notify user callback
terom@45:     conn->callbacks.on_error(conn, err, conn->cb_arg);
terom@37: 
terom@45:     return ERROR_CODE(err);
terom@45: }
terom@45: 
terom@37: 
terom@37: /**
terom@37:  * Update irc_conn.nickname
terom@37:  */
terom@37: static err_t irc_conn_set_nickname (struct irc_conn *conn, const char *nickname)
terom@21: {
terom@37:     struct error_info err;
terom@37: 
terom@37:     // strdup
terom@37:     if ((conn->nickname = strdup(nickname)) == NULL) {
terom@37:         SET_ERROR(&err, ERR_STRDUP);
terom@37: 
terom@37:         // notify
terom@45:         return irc_conn_set_error(conn, &err);
terom@37:     }
terom@37: 
terom@37:     // ok
terom@37:     return SUCCESS;
terom@37: }
terom@37: 
terom@37: /**
terom@37:  * 001 <nick> :Welcome to the Internet Relay Network <nick>!<user>@<host>
terom@37:  */
terom@37: static void on_RPL_WELCOME (const struct irc_line *line, void *arg)
terom@37: {
terom@37:     struct irc_conn *conn = arg;
terom@24: 
terom@21:     // update state
terom@27:     conn->registering = false;
terom@21:     conn->registered = true;
terom@37:     
terom@37:     // set our real nickname from the message target
terom@37:     if (irc_conn_set_nickname(conn, line->args[0]))
terom@37:         return;
terom@22: 
terom@27:     // trigger callback
terom@27:     if (conn->callbacks.on_registered)
terom@27:         conn->callbacks.on_registered(conn, conn->cb_arg);
terom@21: }
terom@21: 
terom@37: /**
terom@20:  * PING <server1> [ <server2> ]
terom@20:  *
terom@20:  * Send a 'PONG <server1>` reply right away.
terom@20:  */ 
terom@37: static void on_PING (const struct irc_line *line, void *arg)
terom@20: {
terom@37:     struct irc_conn *conn = arg;
terom@24: 
terom@20:     // just reply
terom@20:     irc_conn_PONG(conn, line->args[0]);
terom@20: }
terom@20: 
terom@37: /**
terom@37:  * NICK <nickname>
terom@37:  *
terom@37:  * If the prefix is us, then update our nickname
terom@37:  */
terom@37: static void on_NICK (const struct irc_line *line, void *arg)
terom@37: {
terom@37:     struct irc_conn *conn = arg;
terom@37:     char nickname[IRC_NICK_MAX];
terom@37: 
terom@37:     // parse nickname, ignoring errors
terom@37:     if (irc_prefix_parse_nick(line->prefix, nickname)) {
terom@37:         log_warn("invalid prefix: %s", line->prefix);
terom@37:         return;
terom@37:     }
terom@37: 
terom@37:     // ignore if it's not us
terom@37:     if (irc_cmp_nick(nickname, conn->nickname))
terom@37:         return;
terom@37: 
terom@37:     // update our nickname
terom@37:     irc_conn_set_nickname(conn, nickname);
terom@37: }
terom@37: 
terom@37: /**
terom@20:  * Our command handlers
terom@20:  */
terom@37: static struct irc_cmd_handler _cmd_handlers[] = {
terom@37:     {   IRC_RPL_WELCOME,    &on_RPL_WELCOME     },
terom@37:     {   "PING",             &on_PING            },
terom@37:     {   "NICK",             &on_NICK            },
terom@37:     {   NULL,               NULL,               },
terom@20: };
terom@20: 
terom@33: /**
terom@23:  * Incoming line handler
terom@23:  */
terom@18: void irc_conn_on_line (char *line_buf, void *arg) 
terom@18: {
terom@20:     struct irc_conn *conn = arg;
terom@18:     struct irc_line line;
terom@18:     int err;
terom@18:     
terom@18:     // log
terom@22:     log_debug("%s", line_buf);
terom@18: 
terom@18:     // parse
terom@20:     if ((err = irc_line_parse(&line, line_buf))) {
terom@23:         log_warn("invalid line: %s: %s\n", line_buf, error_name(err));
terom@20:         return;
terom@20:     }
terom@18: 
terom@37:     // invoke command handlers
terom@37:     irc_cmd_invoke(&conn->handlers, &line);
terom@18: }
terom@18: 
terom@33: /**
terom@33:  * Transport failed
terom@33:  */
terom@33: void irc_conn_on_error (struct error_info *err, void *arg)
terom@33: {
terom@33:     struct irc_conn *conn = arg;
terom@33: 
terom@33:     // log
terom@33:     log_err_info(err, "line_proto error");
terom@37:     
terom@45:     // trash ourselves
terom@45:     irc_conn_set_error(conn, err);
terom@33: }
terom@33: 
terom@32: static struct line_proto_callbacks _lp_callbacks = {
terom@32:     .on_line        = &irc_conn_on_line,
terom@33:     .on_error       = &irc_conn_on_error,
terom@32: };
terom@32: 
terom@27: err_t irc_conn_create (struct irc_conn **conn_ptr, struct sock_stream *sock, const struct irc_conn_callbacks *callbacks, 
terom@27:         void *cb_arg, struct error_info *err)
terom@18: {
terom@18:     struct irc_conn *conn;
terom@18: 
terom@18:     // alloc new state struct
terom@18:     if ((conn = calloc(1, sizeof(struct irc_conn))) == NULL)
terom@18:         return SET_ERROR(err, ERR_CALLOC);
terom@18: 
terom@27:     // init state
terom@27:     conn->callbacks = *callbacks;
terom@27:     conn->cb_arg = cb_arg;
terom@27: 
terom@23:     // initialize command handlers
terom@37:     irc_cmd_init(&conn->handlers);
terom@23:     
terom@23:     // add the core handlers 
terom@37:     if ((ERROR_CODE(err) = irc_conn_add_cmd_handlers(conn, _cmd_handlers, conn)))
terom@28:         goto error;
terom@23: 
terom@18:     // create the line_proto, with our on_line handler
terom@32:     if (line_proto_create(&conn->lp, sock, IRC_LINE_MAX * 1.5, &_lp_callbacks, conn, err))
terom@28:         goto error;
terom@18: 
terom@18:     // ok
terom@18:     *conn_ptr = conn;
terom@18: 
terom@18:     return SUCCESS;
terom@28: 
terom@28: error:
terom@28:     // release
terom@28:     irc_conn_destroy(conn);
terom@28: 
terom@28:     return ERROR_CODE(err);    
terom@28: }
terom@28: 
terom@28: void irc_conn_destroy (struct irc_conn *conn)
terom@28: {
terom@28:     // release the line_proto
terom@28:     if (conn->lp)
terom@28:         line_proto_release(conn->lp);
terom@37:     
terom@37:     // free the command handlers
terom@37:     irc_cmd_free(&conn->handlers);
terom@28: 
terom@28:     // free the irc_conn itself
terom@28:     free(conn);
terom@18: }
terom@18: 
terom@37: err_t irc_conn_add_cmd_handlers (struct irc_conn *conn, struct irc_cmd_handler *handlers, void *arg)
terom@23: {
terom@37:     // use the irc_cmd stuff
terom@37:     return irc_cmd_add(&conn->handlers, handlers, arg);
terom@23: }
terom@23: 
terom@27: err_t irc_conn_register (struct irc_conn *conn, const struct irc_conn_register_info *info)
terom@27: {
terom@27:     err_t err;
terom@27: 
terom@27:     // assert state
terom@27:     if (conn->registering || conn->registered)
terom@27:         // XXX: stupid error code
terom@27:         return ERR_IRC_CONN_REGISTER_STATE;
terom@27: 
terom@27:     // send the initial messages
terom@27:     if (
terom@27:             (err = irc_conn_NICK(conn, info->nickname))
terom@27:         ||  (err = irc_conn_USER(conn, info->username, info->realname))
terom@27:     )
terom@27:         return err;
terom@27: 
terom@27:     // set state
terom@27:     conn->registering = true;
terom@27:     
terom@27:     // ok
terom@27:     return SUCCESS;
terom@27: }
terom@27: 
terom@18: err_t irc_conn_send (struct irc_conn *conn, const struct irc_line *line)
terom@18: {
terom@18:     char line_buf[IRC_LINE_MAX + 2];
terom@18:     err_t err;
terom@24:     int ret;
terom@18: 
terom@18:     // format
terom@18:     if ((err = irc_line_build(line, line_buf)))
terom@18:         return err;
terom@18:     
terom@18:     // log
terom@22:     log_debug("%s", line_buf);
terom@18: 
terom@18:     // add CRLF
terom@18:     strcat(line_buf, "\r\n");
terom@18: 
terom@18:     // send using line_proto
terom@19:     // XXX: ignore output-buffering
terom@24:     return (ret = line_proto_send(conn->lp, line_buf)) < 0 ? -ret : SUCCESS;
terom@18: }
terom@18: 
terom@18: err_t irc_conn_NICK (struct irc_conn *conn, const char *nickname)
terom@18: {
terom@18:     // NICK <nickname>
terom@18:     struct irc_line line = {
terom@18:         NULL, "NICK", { nickname, NULL }
terom@18:     };
terom@18:     
terom@18:     return irc_conn_send(conn, &line);
terom@18: }
terom@18: 
terom@18: err_t irc_conn_USER (struct irc_conn *conn, const char *username, const char *realname)
terom@18: {
terom@18:     // USER <user> <mode> <unused> <realname>
terom@18:     struct irc_line line = {
terom@20:         NULL, "USER", { username, "0", "*", realname, NULL }
terom@18:     };
terom@18:     
terom@18:     return irc_conn_send(conn, &line);
terom@18: }
terom@18: 
terom@20: err_t irc_conn_PONG (struct irc_conn *conn, const char *target)
terom@20: {
terom@20:     // PONG <server> [ <server2> ]
terom@29:     // params are actually the wrong way around now, but nobody cares
terom@20:     struct irc_line line = {
terom@20:         NULL, "PONG", { target, NULL }
terom@20:     };
terom@20: 
terom@20:     return irc_conn_send(conn, &line);
terom@20: }
terom@20: 
terom@23: err_t irc_conn_JOIN (struct irc_conn *conn, const char *channel)
terom@23: {
terom@23:     // JOIN ( <channel> *( "," <channel> ) [ <key> *( "," <key> ) ] ) / "0"
terom@23:     struct irc_line line = {
terom@23:         NULL, "JOIN", { channel, NULL }
terom@23:     };
terom@23: 
terom@23:     return irc_conn_send(conn, &line);
terom@23: }
terom@23: