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