pidgin/pidgin

IRC: fill required command parameter counts (part 3)
release-2.x.y
2014-01-16, Tomasz Wasilczyk
6b0e0566af20
IRC: fill required command parameter counts (part 3)
/*
* (C) Copyright 2001-2011 Wojtek Kaniewski <wojtekka@irc.pl>
* Robert J. Woźny <speedy@ziew.org>
* Arkadiusz Miśkiewicz <arekm@pld-linux.org>
* Tomasz Chiliński <chilek@chilan.com>
* Adam Wysocki <gophi@ekg.chmurka.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License Version
* 2.1 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
* USA.
*/
/**
* \file handlers.c
*
* \brief Funkcje obsługi przychodzących pakietów
*/
#include <sys/types.h>
#ifndef _WIN32
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
#endif
#include <ctype.h>
#ifndef _WIN32
# ifdef sun
# include <sys/filio.h>
# endif
#endif
#include "compat.h"
#include "libgadu.h"
#include "libgadu-config.h"
#include "resolver.h"
#include "session.h"
#include "protocol.h"
#include "encoding.h"
#include "message.h"
#include "libgadu-internal.h"
#include "deflate.h"
#include <errno.h>
#ifndef _WIN32
# include <netdb.h>
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <time.h>
#ifdef GG_CONFIG_HAVE_OPENSSL
# include <openssl/err.h>
# include <openssl/rand.h>
#endif
/**
* \internal Struktura opisująca funkcję obsługi pakietu.
*/
typedef struct {
/* Typ pakietu */
uint32_t type;
/* Stan w którym pakiet jest obsługiwany */
int state;
/* Minimalny rozmiar danych pakietu */
int min_length;
/* Funkcja obsługująca pakiet. Patrz gg_session_handle_packet(). */
int (*handler)(struct gg_session *, uint32_t, const char *, size_t, struct gg_event *);
} gg_packet_handler_t;
/**
* \internal Obsługuje pakiet GG_WELCOME.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_welcome(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_welcome *w;
int ret;
uint8_t hash_buf[64];
uint32_t local_ip;
struct sockaddr_in sin;
unsigned int sin_len = sizeof(sin);
if (len < sizeof(struct gg_welcome)) {
ge->type = GG_EVENT_CONN_FAILED;
ge->event.failure = GG_FAILURE_INVALID;
gs->state = GG_STATE_IDLE;
close(gs->fd);
gs->fd = -1;
return 0;
}
w = (struct gg_welcome*) ptr;
w->key = gg_fix32(w->key);
memset(hash_buf, 0, sizeof(hash_buf));
switch (gs->hash_type) {
case GG_LOGIN_HASH_GG32:
{
uint32_t hash;
hash = gg_fix32(gg_login_hash((unsigned char*) gs->password, w->key));
gg_debug_session(gs, GG_DEBUG_DUMP, "// gg_watch_fd() challenge %.4x --> GG32 hash %.8x\n", w->key, hash);
memcpy(hash_buf, &hash, sizeof(hash));
break;
}
case GG_LOGIN_HASH_SHA1:
{
#ifndef GG_DEBUG_DISABLE
char tmp[41];
int i;
#endif
gg_login_hash_sha1(gs->password, w->key, hash_buf);
#ifndef GG_DEBUG_DISABLE
for (i = 0; i < 40; i += 2)
snprintf(tmp + i, sizeof(tmp) - i, "%02x", hash_buf[i / 2]);
gg_debug_session(gs, GG_DEBUG_DUMP, "// gg_watch_fd() challenge %.4x --> SHA1 hash: %s\n", w->key, tmp);
#endif
break;
}
default:
break;
}
#if 0
if (gs->password != NULL && (gs->flags & (1 << GG_SESSION_FLAG_CLEAR_PASSWORD))) {
memset(gs->password, 0, strlen(gs->password));
free(gs->password);
gs->password = NULL;
}
#endif
if (!getsockname(gs->fd, (struct sockaddr*) &sin, &sin_len)) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() detected address to %s\n", inet_ntoa(sin.sin_addr));
local_ip = sin.sin_addr.s_addr;
} else {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() unable to detect address\n");
local_ip = 0;
}
if (GG_SESSION_IS_PROTOCOL_8_0(gs)) {
struct gg_login80 l80;
const char *client_name, *version, *descr;
uint32_t client_name_len, version_len, descr_len;
if (gs->external_addr == 0)
gs->external_addr = local_ip;
memset(&l80, 0, sizeof(l80));
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() sending GG_LOGIN80 packet\n");
l80.uin = gg_fix32(gs->uin);
memcpy(l80.language, GG8_LANG, sizeof(l80.language));
l80.hash_type = gs->hash_type;
memcpy(l80.hash, hash_buf, sizeof(l80.hash));
l80.status = gg_fix32(gs->initial_status ? gs->initial_status : GG_STATUS_AVAIL);
l80.flags = gg_fix32(gs->status_flags);
l80.features = gg_fix32(gs->protocol_features);
l80.image_size = gs->image_size;
l80.dunno2 = 0x64;
if (gs->client_version != NULL && !isdigit(gs->client_version[0])) {
client_name = "";
client_name_len = 0;
} else {
client_name = GG8_VERSION;
client_name_len = strlen(GG8_VERSION);
}
version = (gs->client_version != NULL) ? gs->client_version : GG_DEFAULT_CLIENT_VERSION;
version_len = gg_fix32(client_name_len + strlen(version));
descr = (gs->initial_descr != NULL) ? gs->initial_descr : "";
descr_len = (gs->initial_descr != NULL) ? gg_fix32(strlen(gs->initial_descr)) : 0;
ret = gg_send_packet(gs,
GG_LOGIN80,
&l80, sizeof(l80),
&version_len, sizeof(version_len),
client_name, client_name_len,
version, strlen(version),
&descr_len, sizeof(descr_len),
descr, strlen(descr),
NULL);
} else {
struct gg_login70 l70;
if (gg_dcc_ip != (unsigned long) inet_addr("255.255.255.255"))
local_ip = gg_dcc_ip;
gs->client_addr = local_ip;
memset(&l70, 0, sizeof(l70));
l70.uin = gg_fix32(gs->uin);
l70.hash_type = gs->hash_type;
memcpy(l70.hash, hash_buf, sizeof(l70.hash));
l70.status = gg_fix32(gs->initial_status ? gs->initial_status : GG_STATUS_AVAIL);
l70.version = gg_fix32(gs->protocol_version | gs->protocol_flags);
if (gs->external_addr && gs->external_port > 1023) {
l70.local_ip = gs->external_addr;
l70.local_port = gg_fix16(gs->external_port);
} else {
l70.local_ip = local_ip;
l70.local_port = gg_fix16(gg_dcc_port);
}
l70.image_size = gs->image_size;
l70.dunno2 = 0xbe;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() sending GG_LOGIN70 packet\n");
ret = gg_send_packet(gs, GG_LOGIN70, &l70, sizeof(l70), gs->initial_descr, (gs->initial_descr) ? strlen(gs->initial_descr) : 0, NULL);
}
if (ret == -1) {
int errno_copy;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() sending packet failed. (errno=%d, %s)\n", errno, strerror(errno));
errno_copy = errno;
close(gs->fd);
errno = errno_copy;
gs->fd = -1;
ge->type = GG_EVENT_CONN_FAILED;
ge->event.failure = GG_FAILURE_WRITING;
gs->state = GG_STATE_IDLE;
return -1;
}
gs->state = GG_STATE_READING_REPLY;
gs->check = GG_CHECK_READ;
return 0;
}
/**
* \internal Obsługuje pakiet GG_LOGIN_OK.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_login_ok(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() login succeded\n");
ge->type = GG_EVENT_CONN_SUCCESS;
gs->state = GG_STATE_CONNECTED;
gs->check = GG_CHECK_READ;
gs->timeout = -1;
gs->status = (gs->initial_status) ? gs->initial_status : GG_STATUS_AVAIL;
#if 0
free(gs->status_descr);
gs->status_descr = gs->initial_descr;
#else
free(gs->initial_descr);
#endif
gs->initial_descr = NULL;
return 0;
}
/**
* \internal Obsługuje pakiet GG_LOGIN_FAILED.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_login_failed(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
if (type != GG_DISCONNECTING)
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() login failed\n");
else
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd() too many incorrect password attempts\n");
ge->type = GG_EVENT_CONN_FAILED;
ge->event.failure = (type != GG_DISCONNECTING) ? GG_FAILURE_PASSWORD : GG_FAILURE_INTRUDER;
gs->state = GG_STATE_IDLE;
close(gs->fd);
gs->fd = -1;
errno = EACCES;
return 0;
}
/**
* \internal Obsługuje pakiet GG_SEND_MSG_ACK.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_send_msg_ack(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_send_msg_ack *s = (struct gg_send_msg_ack*) ptr;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a message ack\n");
ge->type = GG_EVENT_ACK;
ge->event.ack.status = gg_fix32(s->status);
ge->event.ack.recipient = gg_fix32(s->recipient);
ge->event.ack.seq = gg_fix32(s->seq);
return 0;
}
/**
* \internal Obsługuje pakiet GG_PONG.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_pong(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a pong\n");
ge->type = GG_EVENT_PONG;
gs->last_pong = time(NULL);
return 0;
}
/**
* \internal Obsługuje pakiet GG_DISCONNECTING.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_disconnecting(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received disconnection warning\n");
ge->type = GG_EVENT_DISCONNECT;
return 0;
}
/**
* \internal Obsługuje pakiet GG_DISCONNECT_ACK.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_disconnect_ack(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received logoff acknowledge\n");
ge->type = GG_EVENT_DISCONNECT_ACK;
return 0;
}
/**
* \internal Obsługuje pakiety GG_XML_EVENT i GG_XML_ACTION.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_xml_event(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received XML event\n");
ge->type = GG_EVENT_XML_EVENT;
ge->event.xml_event.data = malloc(len + 1);
if (ge->event.xml_event.data == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
memcpy(ge->event.xml_event.data, ptr, len);
ge->event.xml_event.data[len] = 0;
return 0;
}
/**
* \internal Obsługuje pakiet GG_PUBDIR50_REPLY.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_pubdir50_reply(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received pubdir/search reply\n");
return gg_pubdir50_handle_reply_sess(gs, ge, ptr, len);
}
/**
* \internal Obsługuje pakiet GG_USERLIST_REPLY.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_userlist_reply(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
char reply_type;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received userlist reply\n");
reply_type = ptr[0];
/* jeśli odpowiedź na eksport, wywołaj zdarzenie tylko
* gdy otrzymano wszystkie odpowiedzi */
if (reply_type == GG_USERLIST_PUT_REPLY || reply_type == GG_USERLIST_PUT_MORE_REPLY) {
if (--gs->userlist_blocks)
return 0;
reply_type = GG_USERLIST_PUT_REPLY;
}
if (len > 1) {
unsigned int reply_len = (gs->userlist_reply != NULL) ? strlen(gs->userlist_reply) : 0;
char *tmp;
gg_debug_session(gs, GG_DEBUG_MISC, "userlist_reply=%p, len=%d\n", gs->userlist_reply, len);
tmp = realloc(gs->userlist_reply, reply_len + len);
if (tmp == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
gs->userlist_reply = tmp;
memcpy(gs->userlist_reply + reply_len, ptr + 1, len - 1);
gs->userlist_reply[reply_len + len - 1] = 0;
}
if (reply_type == GG_USERLIST_GET_MORE_REPLY)
return 0;
ge->type = GG_EVENT_USERLIST;
ge->event.userlist.type = reply_type;
ge->event.userlist.reply = gs->userlist_reply;
gs->userlist_reply = NULL;
return 0;
}
/**
* \internal Obsługuje pakiet GG_DCC7_ID_REPLY.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_dcc7_id_reply(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received dcc7 id packet\n");
return gg_dcc7_handle_id(gs, ge, ptr, len);
}
/**
* \internal Obsługuje pakiet GG_DCC7_ACCEPT.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_dcc7_accept(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received dcc7 accept\n");
return gg_dcc7_handle_accept(gs, ge, ptr, len);
}
/**
* \internal Obsługuje pakiet GG_DCC7_NEW.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_dcc7_new(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received dcc7 request\n");
return gg_dcc7_handle_new(gs, ge, ptr, len);
}
/**
* \internal Obsługuje pakiet GG_DCC7_REJECT.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_dcc7_reject(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received dcc7 reject\n");
return gg_dcc7_handle_reject(gs, ge, ptr, len);
}
/**
* \internal Obsługuje pakiet GG_DCC7_INFO.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_dcc7_info(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received dcc7 info\n");
return gg_dcc7_handle_info(gs, ge, ptr, len);
}
/**
* \internal Analizuje przychodzący pakiet z obrazkiem.
*
* \param e Struktura zdarzenia
* \param p Bufor z danymi
* \param len Długość bufora
* \param sess Struktura sesji
* \param sender Numer nadawcy
*/
static void gg_image_queue_parse(struct gg_event *e, const char *p, unsigned int len, struct gg_session *sess, uin_t sender)
{
struct gg_msg_image_reply *i = (void*) p;
struct gg_image_queue *q, *qq;
if (!p || !sess || !e) {
errno = EFAULT;
return;
}
/* znajdź dany obrazek w kolejce danej sesji */
for (qq = sess->images, q = NULL; qq; qq = qq->next) {
if (sender == qq->sender && i->size == qq->size && i->crc32 == qq->crc32) {
q = qq;
break;
}
}
if (!q) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_image_queue_parse() unknown image from %d, size=%d, crc32=%.8x\n", sender, i->size, i->crc32);
return;
}
if (p[0] == GG_MSG_OPTION_IMAGE_REPLY) {
q->done = 0;
len -= sizeof(struct gg_msg_image_reply);
p += sizeof(struct gg_msg_image_reply);
if (memchr(p, 0, len) == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_image_queue_parse() malformed packet from %d, unlimited filename\n", sender);
return;
}
if (!(q->filename = strdup(p))) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_image_queue_parse() out of memory\n");
return;
}
len -= strlen(p) + 1;
p += strlen(p) + 1;
} else {
len -= sizeof(struct gg_msg_image_reply);
p += sizeof(struct gg_msg_image_reply);
}
if (q->done + len > q->size)
len = q->size - q->done;
memcpy(q->image + q->done, p, len);
q->done += len;
/* jeśli skończono odbierać obrazek, wygeneruj zdarzenie */
if (q->done >= q->size) {
e->type = GG_EVENT_IMAGE_REPLY;
e->event.image_reply.sender = sender;
e->event.image_reply.size = q->size;
e->event.image_reply.crc32 = q->crc32;
e->event.image_reply.filename = q->filename;
e->event.image_reply.image = q->image;
gg_image_queue_remove(sess, q, 0);
free(q);
}
}
/**
* \internal Analizuje informacje rozszerzone wiadomości.
*
* \param sess Struktura sesji.
* \param e Struktura zdarzenia.
* \param sender Numer nadawcy.
* \param p Wskaźnik na dane rozszerzone.
* \param packet_end Wskaźnik na koniec pakietu.
*
* \return 0 jeśli się powiodło, -1 jeśli wiadomość obsłużono i wynik ma
* zostać przekazany aplikacji, -2 jeśli wystąpił błąd ogólny, -3 jeśli
* wiadomość jest niepoprawna.
*/
static int gg_handle_recv_msg_options(struct gg_session *sess, struct gg_event *e, uin_t sender, const char *p, const char *packet_end)
{
while (p < packet_end) {
switch (*p) {
case GG_MSG_OPTION_CONFERENCE:
{
struct gg_msg_recipients *m = (void*) p;
uint32_t i, count;
p += sizeof(*m);
if (p > packet_end) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() packet out of bounds (1)\n");
goto malformed;
}
count = gg_fix32(m->count);
if (p + count * sizeof(uin_t) > packet_end || p + count * sizeof(uin_t) < p || count > 0xffff) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() packet out of bounds (1.5)\n");
goto malformed;
}
if (e->event.msg.recipients != NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() e->event.msg.recipients already exist\n");
goto malformed;
}
e->event.msg.recipients = malloc(count * sizeof(uin_t));
if (e->event.msg.recipients == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() not enough memory for recipients data\n");
goto fail;
}
memcpy(e->event.msg.recipients, p, count * sizeof(uin_t));
p += count * sizeof(uin_t);
for (i = 0; i < count; i++)
e->event.msg.recipients[i] = gg_fix32(e->event.msg.recipients[i]);
e->event.msg.recipients_count = count;
break;
}
case GG_MSG_OPTION_ATTRIBUTES:
{
uint16_t len;
char *buf;
if (p + 3 > packet_end) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() packet out of bounds (2)\n");
goto malformed;
}
memcpy(&len, p + 1, sizeof(uint16_t));
len = gg_fix16(len);
if (e->event.msg.formats != NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() e->event.msg.formats already exist\n");
goto malformed;
}
buf = malloc(len);
if (buf == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() not enough memory for richtext data\n");
goto fail;
}
p += 3;
if (p + len > packet_end) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() packet out of bounds (3)\n");
free(buf);
goto malformed;
}
memcpy(buf, p, len);
e->event.msg.formats = buf;
e->event.msg.formats_length = len;
p += len;
break;
}
case GG_MSG_OPTION_IMAGE_REQUEST:
{
struct gg_msg_image_request *i = (void*) p;
if (p + sizeof(*i) > packet_end) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (3)\n");
goto malformed;
}
if (e->event.msg.formats != NULL || e->event.msg.recipients != NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() mixed options (1)\n");
goto malformed;
}
e->event.image_request.sender = sender;
e->event.image_request.size = gg_fix32(i->size);
e->event.image_request.crc32 = gg_fix32(i->crc32);
e->type = GG_EVENT_IMAGE_REQUEST;
goto handled;
}
case GG_MSG_OPTION_IMAGE_REPLY:
case GG_MSG_OPTION_IMAGE_REPLY_MORE:
{
struct gg_msg_image_reply *rep = (void*) p;
if (e->event.msg.formats != NULL || e->event.msg.recipients != NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg_options() mixed options (2)\n");
goto malformed;
}
if (p + sizeof(struct gg_msg_image_reply) == packet_end) {
/* pusta odpowiedź - klient po drugiej stronie nie ma żądanego obrazka */
e->type = GG_EVENT_IMAGE_REPLY;
e->event.image_reply.sender = sender;
e->event.image_reply.size = 0;
e->event.image_reply.crc32 = gg_fix32(rep->crc32);
e->event.image_reply.filename = NULL;
e->event.image_reply.image = NULL;
goto handled;
} else if (p + sizeof(struct gg_msg_image_reply) + 1 > packet_end) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() packet out of bounds (4)\n");
goto malformed;
}
rep->size = gg_fix32(rep->size);
rep->crc32 = gg_fix32(rep->crc32);
gg_image_queue_parse(e, p, (unsigned int)(packet_end - p), sess, sender);
goto handled;
}
default:
{
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() unknown payload 0x%.2x\n", *p);
p = packet_end;
}
}
}
return 0;
handled:
return -1;
fail:
return -2;
malformed:
return -3;
}
/**
* \internal Wysyła potwierdzenie odebrania wiadomości.
*
* \param gs Struktura sesji
* \param seq Numer sekwencyjny odebranej wiadomości
*
* \return 0 jeśli się powiodło, -1 jeśli wystąpił błąd
*/
static int gg_session_send_msg_ack(struct gg_session *gs, uint32_t seq)
{
struct gg_recv_msg_ack pkt;
gg_debug_session(gs, GG_DEBUG_FUNCTION, "** gg_session_send_msg_ack(%p);\n", gs);
if ((gs->protocol_features & GG_FEATURE_MSG_ACK) == 0)
return 0;
/* Kiedyś zdawało nam się, że mamy wysyłać liczbę odebranych
* wiadomości, ale okazało się, że numer sekwencyjny. */
gs->recv_msg_count++;
pkt.seq = gg_fix32(seq);
return gg_send_packet(gs, GG_RECV_MSG_ACK, &pkt, sizeof(pkt), NULL);
}
/**
* \internal Obsługuje pakiet GG_RECV_MSG.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_recv_msg(struct gg_session *sess, uint32_t type, const char *packet, size_t length, struct gg_event *e)
{
const struct gg_recv_msg *r = (const struct gg_recv_msg*) packet;
const char *payload = packet + sizeof(struct gg_recv_msg);
const char *payload_end = packet + length;
char *tmp;
gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_handle_recv_msg(%p, %d, %p);\n", packet, length, e);
if ((r->seq == 0) && (r->msgclass == 0)) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() oops, silently ignoring the bait\n");
goto malformed;
}
// jednobajtowa wiadomość o treści \x02 to żądanie połączenia DCC
if (*payload == GG_MSG_CALLBACK && payload == payload_end - 1) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() received ctcp packet\n");
length = 1;
} else {
const char *options;
options = memchr(payload, 0, (size_t) (payload_end - payload));
if (options == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg() malformed packet, message out of bounds (0)\n");
goto malformed;
}
length = (size_t) (options - payload);
switch (gg_handle_recv_msg_options(sess, e, gg_fix32(r->sender), options + 1, payload_end)) {
case -1: // handled
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
case -2: // failed
goto fail;
case -3: // malformed
goto malformed;
}
}
e->type = GG_EVENT_MSG;
e->event.msg.msgclass = gg_fix32(r->msgclass);
e->event.msg.sender = gg_fix32(r->sender);
e->event.msg.time = gg_fix32(r->time);
e->event.msg.seq = gg_fix32(r->seq);
tmp = gg_encoding_convert(payload, GG_ENCODING_CP1250, sess->encoding, length, -1);
if (tmp == NULL)
goto fail;
e->event.msg.message = (unsigned char*) tmp;
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
fail:
free(e->event.msg.message);
free(e->event.msg.recipients);
free(e->event.msg.formats);
return -1;
malformed:
e->type = GG_EVENT_NONE;
free(e->event.msg.message);
free(e->event.msg.xhtml_message);
free(e->event.msg.recipients);
free(e->event.msg.formats);
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
}
/**
* \internal Obsługuje pakiet GG_RECV_MSG80.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_recv_msg_80(struct gg_session *sess, uint32_t type, const char *packet, size_t length, struct gg_event *e)
{
const struct gg_recv_msg80 *r = (const struct gg_recv_msg80*) packet;
uint32_t offset_plain;
uint32_t offset_attr;
gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_handle_recv_msg80(%p, %d, %p);\n", packet, length, e);
if (r->seq == 0 && r->msgclass == 0) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg80() oops, silently ignoring the bait\n");
goto malformed;
}
offset_plain = gg_fix32(r->offset_plain);
offset_attr = gg_fix32(r->offset_attr);
if (offset_plain < sizeof(struct gg_recv_msg80) || offset_plain >= length) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg80() malformed packet, message out of bounds (0)\n");
goto malformed;
}
if (offset_attr < sizeof(struct gg_recv_msg80) || offset_attr > length) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg80() malformed packet, attr out of bounds (1)\n");
offset_attr = 0; /* nie parsuj attr. */
}
/* Normalna sytuacja, więc nie podpada pod powyższy warunek. */
if (offset_attr == length)
offset_attr = 0;
if (memchr(packet + offset_plain, 0, length - offset_plain) == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg80() malformed packet, message out of bounds (2)\n");
goto malformed;
}
if (offset_plain > sizeof(struct gg_recv_msg80) && memchr(packet + sizeof(struct gg_recv_msg80), 0, offset_plain - sizeof(struct gg_recv_msg80)) == NULL) {
gg_debug_session(sess, GG_DEBUG_MISC, "// gg_handle_recv_msg80() malformed packet, message out of bounds (3)\n");
goto malformed;
}
e->type = (type != GG_RECV_OWN_MSG) ? GG_EVENT_MSG : GG_EVENT_MULTILOGON_MSG;
e->event.msg.msgclass = gg_fix32(r->msgclass);
e->event.msg.sender = gg_fix32(r->sender);
e->event.msg.time = gg_fix32(r->time);
e->event.msg.seq = gg_fix32(r->seq);
if (offset_attr != 0) {
switch (gg_handle_recv_msg_options(sess, e, gg_fix32(r->sender), packet + offset_attr, packet + length)) {
case -1: // handled
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
case -2: // failed
goto fail;
case -3: // malformed
goto malformed;
}
}
if (sess->encoding == GG_ENCODING_CP1250) {
e->event.msg.message = (unsigned char*) strdup(packet + offset_plain);
} else {
if (offset_plain > sizeof(struct gg_recv_msg80)) {
int len;
len = gg_message_html_to_text(NULL, packet + sizeof(struct gg_recv_msg80));
e->event.msg.message = malloc(len + 1);
if (e->event.msg.message == NULL)
goto fail;
gg_message_html_to_text((char*) e->event.msg.message, packet + sizeof(struct gg_recv_msg80));
} else {
e->event.msg.message = (unsigned char*) gg_encoding_convert(packet + offset_plain, GG_ENCODING_CP1250, sess->encoding, -1, -1);
}
}
if (offset_plain > sizeof(struct gg_recv_msg80))
e->event.msg.xhtml_message = gg_encoding_convert(packet + sizeof(struct gg_recv_msg80), GG_ENCODING_UTF8, sess->encoding, -1, -1);
else
e->event.msg.xhtml_message = NULL;
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
fail:
free(e->event.msg.message);
free(e->event.msg.xhtml_message);
free(e->event.msg.recipients);
free(e->event.msg.formats);
return -1;
malformed:
e->type = GG_EVENT_NONE;
free(e->event.msg.message);
free(e->event.msg.xhtml_message);
free(e->event.msg.recipients);
free(e->event.msg.formats);
gg_session_send_msg_ack(sess, gg_fix32(r->seq));
return 0;
}
/**
* \internal Obsługuje pakiet GG_STATUS.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_status(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_status *s = (void*) ptr;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a status change\n");
ge->type = GG_EVENT_STATUS;
ge->event.status.uin = gg_fix32(s->uin);
ge->event.status.status = gg_fix32(s->status);
ge->event.status.descr = NULL;
if (len > sizeof(*s)) {
ge->event.status.descr = gg_encoding_convert(ptr + sizeof(*s), GG_ENCODING_CP1250, gs->encoding, len - sizeof(*s), -1);
if (ge->event.status.descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
}
return 0;
}
/**
* \internal Obsługuje pakiety GG_STATUS60, GG_STATUS77 i GG_STATUS80BETA.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_status_60_77_80beta(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_status60 *s60 = (void*) ptr;
struct gg_status77 *s77 = (void*) ptr;
size_t struct_len;
uint32_t uin;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a status change\n");
ge->type = GG_EVENT_STATUS60;
ge->event.status60.descr = NULL;
ge->event.status60.time = 0;
if (type == GG_STATUS60) {
uin = gg_fix32(s60->uin);
ge->event.status60.status = s60->status;
ge->event.status60.remote_ip = s60->remote_ip;
ge->event.status60.remote_port = gg_fix16(s60->remote_port);
ge->event.status60.version = s60->version;
ge->event.status60.image_size = s60->image_size;
struct_len = sizeof(*s60);
} else {
uin = gg_fix32(s77->uin);
ge->event.status60.status = s77->status;
ge->event.status60.remote_ip = s77->remote_ip;
ge->event.status60.remote_port = gg_fix16(s77->remote_port);
ge->event.status60.version = s77->version;
ge->event.status60.image_size = s77->image_size;
struct_len = sizeof(*s77);
}
ge->event.status60.uin = uin & 0x00ffffff;
if (uin & 0x40000000)
ge->event.status60.version |= GG_HAS_AUDIO_MASK;
if (uin & 0x20000000)
ge->event.status60.version |= GG_HAS_AUDIO7_MASK;
if (uin & 0x08000000)
ge->event.status60.version |= GG_ERA_OMNIX_MASK;
if (len > struct_len) {
size_t descr_len;
descr_len = len - struct_len;
ge->event.status60.descr = gg_encoding_convert(ptr + struct_len, (type == GG_STATUS80BETA) ? GG_ENCODING_UTF8 : GG_ENCODING_CP1250, gs->encoding, descr_len, -1);
if (ge->event.status60.descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
if (descr_len > 4 && ptr[len - 5] == 0) {
uint32_t t;
memcpy(&t, ptr + len - 4, sizeof(uint32_t));
ge->event.status60.time = gg_fix32(t);
}
}
return 0;
}
/**
* \internal Obsługuje pakiet GG_NOTIFY_REPLY.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_notify_reply(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_notify_reply *n = (void*) ptr;
char *descr;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");
if (gg_fix32(n->status) == GG_STATUS_BUSY_DESCR || gg_fix32(n->status) == GG_STATUS_NOT_AVAIL_DESCR || gg_fix32(n->status) == GG_STATUS_AVAIL_DESCR) {
size_t descr_len;
ge->type = GG_EVENT_NOTIFY_DESCR;
if (!(ge->event.notify_descr.notify = (void*) malloc(sizeof(*n) * 2))) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify_descr.notify[1].uin = 0;
memcpy(ge->event.notify_descr.notify, ptr, sizeof(*n));
ge->event.notify_descr.notify[0].uin = gg_fix32(ge->event.notify_descr.notify[0].uin);
ge->event.notify_descr.notify[0].status = gg_fix32(ge->event.notify_descr.notify[0].status);
ge->event.notify_descr.notify[0].remote_port = gg_fix16(ge->event.notify_descr.notify[0].remote_port);
ge->event.notify_descr.notify[0].version = gg_fix32(ge->event.notify_descr.notify[0].version);
descr_len = len - sizeof(*n);
descr = gg_encoding_convert(ptr + sizeof(*n), GG_ENCODING_CP1250, gs->encoding, descr_len, -1);
if (descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify_descr.descr = descr;
} else {
unsigned int i, count;
ge->type = GG_EVENT_NOTIFY;
if (!(ge->event.notify = (void*) malloc(len + 2 * sizeof(*n)))) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
memcpy(ge->event.notify, ptr, len);
count = len / sizeof(*n);
ge->event.notify[count].uin = 0;
for (i = 0; i < count; i++) {
ge->event.notify[i].uin = gg_fix32(ge->event.notify[i].uin);
ge->event.notify[i].status = gg_fix32(ge->event.notify[i].status);
ge->event.notify[i].remote_port = gg_fix16(ge->event.notify[i].remote_port);
ge->event.notify[i].version = gg_fix32(ge->event.notify[i].version);
}
}
return 0;
}
/**
* \internal Obsługuje pakiet GG_STATUS80.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_status_80(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_notify_reply80 *n = (void*) ptr;
size_t descr_len;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a status change\n");
ge->type = GG_EVENT_STATUS60;
ge->event.status60.uin = gg_fix32(n->uin);
ge->event.status60.status = gg_fix32(n->status);
ge->event.status60.remote_ip = n->remote_ip;
ge->event.status60.remote_port = gg_fix16(n->remote_port);
ge->event.status60.version = 0;
ge->event.status60.image_size = n->image_size;
ge->event.status60.descr = NULL;
ge->event.status60.time = 0;
descr_len = gg_fix32(n->descr_len);
if (descr_len != 0 && sizeof(struct gg_notify_reply80) + descr_len <= len) {
ge->event.status60.descr = gg_encoding_convert((char*) n + sizeof(struct gg_notify_reply80), GG_ENCODING_UTF8, gs->encoding, descr_len, -1);
if (ge->event.status60.descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
/* XXX czas */
}
return 0;
}
/**
* \internal Obsługuje pakiet GG_NOTIFY_REPLY80.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_notify_reply_80(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_notify_reply80 *n = (void*) ptr;
unsigned int length = len, i = 0;
// TODO: najpierw przeanalizować strukturę i określić
// liczbę rekordów, żeby obyć się bez realloc()
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");
ge->type = GG_EVENT_NOTIFY60;
ge->event.notify60 = malloc(sizeof(*ge->event.notify60));
if (!ge->event.notify60) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify60[0].uin = 0;
while (length >= sizeof(struct gg_notify_reply80)) {
uin_t uin = gg_fix32(n->uin);
int descr_len;
char *tmp;
ge->event.notify60[i].uin = uin;
ge->event.notify60[i].status = gg_fix32(n->status);
ge->event.notify60[i].remote_ip = n->remote_ip;
ge->event.notify60[i].remote_port = gg_fix16(n->remote_port);
ge->event.notify60[i].version = 0;
ge->event.notify60[i].image_size = n->image_size;
ge->event.notify60[i].descr = NULL;
ge->event.notify60[i].time = 0;
descr_len = gg_fix32(n->descr_len);
if (descr_len != 0) {
if (sizeof(struct gg_notify_reply80) + descr_len <= length) {
ge->event.notify60[i].descr = gg_encoding_convert((char*) n + sizeof(struct gg_notify_reply80), GG_ENCODING_UTF8, gs->encoding, descr_len, -1);
if (ge->event.notify60[i].descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
/* XXX czas */
length -= sizeof(struct gg_notify_reply80) + descr_len;
n = (void*) ((char*) n + sizeof(struct gg_notify_reply80) + descr_len);
} else {
length = 0;
}
} else {
length -= sizeof(struct gg_notify_reply80);
n = (void*) ((char*) n + sizeof(struct gg_notify_reply80));
}
if (!(tmp = realloc(ge->event.notify60, (i + 2) * sizeof(*ge->event.notify60)))) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
free(ge->event.notify60);
return -1;
}
ge->event.notify60 = (void*) tmp;
ge->event.notify60[++i].uin = 0;
}
return 0;
}
/**
* \internal Obsługuje pakiety GG_NOTIFY_REPLY77 i GG_NOTIFY_REPLY80BETA.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_notify_reply_77_80beta(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_notify_reply77 *n = (void*) ptr;
unsigned int length = len, i = 0;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");
ge->type = GG_EVENT_NOTIFY60;
ge->event.notify60 = malloc(sizeof(*ge->event.notify60));
if (ge->event.notify60 == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify60[0].uin = 0;
while (length >= sizeof(struct gg_notify_reply77)) {
uin_t uin = gg_fix32(n->uin);
char *tmp;
ge->event.notify60[i].uin = uin & 0x00ffffff;
ge->event.notify60[i].status = n->status;
ge->event.notify60[i].remote_ip = n->remote_ip;
ge->event.notify60[i].remote_port = gg_fix16(n->remote_port);
ge->event.notify60[i].version = n->version;
ge->event.notify60[i].image_size = n->image_size;
ge->event.notify60[i].descr = NULL;
ge->event.notify60[i].time = 0;
if (uin & 0x40000000)
ge->event.notify60[i].version |= GG_HAS_AUDIO_MASK;
if (uin & 0x20000000)
ge->event.notify60[i].version |= GG_HAS_AUDIO7_MASK;
if (uin & 0x08000000)
ge->event.notify60[i].version |= GG_ERA_OMNIX_MASK;
if (GG_S_D(n->status)) {
unsigned char descr_len = *((char*) n + sizeof(struct gg_notify_reply77));
if (sizeof(struct gg_notify_reply77) + descr_len <= length) {
ge->event.notify60[i].descr = gg_encoding_convert((char*) n + sizeof(struct gg_notify_reply77) + 1, (type == GG_NOTIFY_REPLY80BETA) ? GG_ENCODING_UTF8 : GG_ENCODING_CP1250, gs->encoding, descr_len, -1);
if (ge->event.notify60[i].descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
/* XXX czas */
length -= sizeof(struct gg_notify_reply77) + descr_len + 1;
n = (void*) ((char*) n + sizeof(struct gg_notify_reply77) + descr_len + 1);
} else {
length = 0;
}
} else {
length -= sizeof(struct gg_notify_reply77);
n = (void*) ((char*) n + sizeof(struct gg_notify_reply77));
}
if (!(tmp = realloc(ge->event.notify60, (i + 2) * sizeof(*ge->event.notify60)))) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
free(ge->event.notify60);
return -1;
}
ge->event.notify60 = (void*) tmp;
ge->event.notify60[++i].uin = 0;
}
return 0;
}
/**
* \internal Obsługuje pakiet GG_NOTIFY_REPLY60.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_notify_reply_60(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_notify_reply60 *n = (void*) ptr;
unsigned int length = len, i = 0;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received a notify reply\n");
ge->type = GG_EVENT_NOTIFY60;
ge->event.notify60 = malloc(sizeof(*ge->event.notify60));
if (ge->event.notify60 == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify60[0].uin = 0;
while (length >= sizeof(struct gg_notify_reply60)) {
uin_t uin = gg_fix32(n->uin);
char *tmp;
ge->event.notify60[i].uin = uin & 0x00ffffff;
ge->event.notify60[i].status = n->status;
ge->event.notify60[i].remote_ip = n->remote_ip;
ge->event.notify60[i].remote_port = gg_fix16(n->remote_port);
ge->event.notify60[i].version = n->version;
ge->event.notify60[i].image_size = n->image_size;
ge->event.notify60[i].descr = NULL;
ge->event.notify60[i].time = 0;
if (uin & 0x40000000)
ge->event.notify60[i].version |= GG_HAS_AUDIO_MASK;
if (uin & 0x08000000)
ge->event.notify60[i].version |= GG_ERA_OMNIX_MASK;
if (GG_S_D(n->status)) {
unsigned char descr_len = *((char*) n + sizeof(struct gg_notify_reply60));
if (sizeof(struct gg_notify_reply60) + descr_len <= length) {
char *descr;
descr = gg_encoding_convert((char*) n + sizeof(struct gg_notify_reply60) + 1, GG_ENCODING_CP1250, gs->encoding, descr_len, -1);
if (descr == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
return -1;
}
ge->event.notify60[i].descr = descr;
/* XXX czas */
length -= sizeof(struct gg_notify_reply60) + descr_len + 1;
n = (void*) ((char*) n + sizeof(struct gg_notify_reply60) + descr_len + 1);
} else {
length = 0;
}
} else {
length -= sizeof(struct gg_notify_reply60);
n = (void*) ((char*) n + sizeof(struct gg_notify_reply60));
}
if (!(tmp = realloc(ge->event.notify60, (i + 2) * sizeof(*ge->event.notify60)))) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() out of memory\n");
free(ge->event.notify60);
return -1;
}
ge->event.notify60 = (void*) tmp;
ge->event.notify60[++i].uin = 0;
}
return 0;
}
/**
* \internal Obsługuje pakiet GG_USER_DATA.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_user_data(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_user_data d;
char *p = (char*) ptr;
char *packet_end = (char*) ptr + len;
struct gg_event_user_data_user *users;
int i, j;
int res = 0;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received user data\n");
ge->event.user_data.user_count = 0;
ge->event.user_data.users = NULL;
if (ptr + sizeof(d) > packet_end)
goto malformed;
memcpy(&d, p, sizeof(d));
p += sizeof(d);
d.type = gg_fix32(d.type);
d.user_count = gg_fix32(d.user_count);
if (d.user_count > 0xffff) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (1)\n");
goto malformed;
}
if (d.user_count > 0) {
users = calloc(d.user_count, sizeof(struct gg_event_user_data_user));
if (users == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() out of memory (%d*%d)\n", d.user_count, sizeof(struct gg_event_user_data_user));
goto fail;
}
} else {
users = NULL;
}
ge->type = GG_EVENT_USER_DATA;
ge->event.user_data.type = d.type;
ge->event.user_data.user_count = d.user_count;
ge->event.user_data.users = users;
gg_debug_session(gs, GG_DEBUG_DUMP, "type=%d, count=%d\n", d.type, d.user_count);
for (i = 0; i < d.user_count; i++) {
struct gg_user_data_user u;
struct gg_event_user_data_attr *attrs;
if (p + sizeof(u) > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (2)\n");
goto malformed;
}
memcpy(&u, p, sizeof(u));
p += sizeof(u);
u.uin = gg_fix32(u.uin);
u.attr_count = gg_fix32(u.attr_count);
if (u.attr_count > 0xffff) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (2)\n");
goto malformed;
}
if (u.attr_count > 0) {
attrs = calloc(u.attr_count, sizeof(struct gg_event_user_data_attr));
if (attrs == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() out of memory (%d*%d)\n", u.attr_count, sizeof(struct gg_event_user_data_attr));
goto fail;
}
} else {
attrs = NULL;
}
users[i].uin = u.uin;
users[i].attr_count = u.attr_count;
users[i].attrs = attrs;
gg_debug_session(gs, GG_DEBUG_DUMP, " uin=%d, count=%d\n", u.uin, u.attr_count);
for (j = 0; j < u.attr_count; j++) {
uint32_t key_size;
uint32_t attr_type;
uint32_t value_size;
char *key;
char *value;
if (p + sizeof(key_size) > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (3)\n");
goto malformed;
}
memcpy(&key_size, p, sizeof(key_size));
p += sizeof(key_size);
key_size = gg_fix32(key_size);
if (key_size > 0xffff || p + key_size > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (3)\n");
goto malformed;
}
key = malloc(key_size + 1);
if (key == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() out of memory (%d)\n", key_size + 1);
goto fail;
}
memcpy(key, p, key_size);
p += key_size;
key[key_size] = 0;
attrs[j].key = key;
if (p + sizeof(attr_type) + sizeof(value_size) > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (4)\n");
goto malformed;
}
memcpy(&attr_type, p, sizeof(attr_type));
p += sizeof(attr_type);
memcpy(&value_size, p, sizeof(value_size));
p += sizeof(value_size);
attrs[j].type = gg_fix32(attr_type);
value_size = gg_fix32(value_size);
if (value_size > 0xffff || p + value_size > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() malformed packet (5)\n");
goto malformed;
}
value = malloc(value_size + 1);
if (value == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_user_data() out of memory (%d)\n", value_size + 1);
goto fail;
}
memcpy(value, p, value_size);
p += value_size;
value[value_size] = 0;
attrs[j].value = value;
gg_debug_session(gs, GG_DEBUG_DUMP, " key=\"%s\", type=%d, value=\"%s\"\n", key, attr_type, value);
}
}
return 0;
fail:
res = -1;
malformed:
ge->type = GG_EVENT_NONE;
for (i = 0; i < ge->event.user_data.user_count; i++) {
for (j = 0; j < ge->event.user_data.users[i].attr_count; j++) {
free(ge->event.user_data.users[i].attrs[j].key);
free(ge->event.user_data.users[i].attrs[j].value);
}
free(ge->event.user_data.users[i].attrs);
}
free(ge->event.user_data.users);
return res;
}
/**
* \internal Obsługuje pakiet GG_TYPING_NOTIFICATION.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_typing_notification(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_typing_notification *n = (void*) ptr;
uin_t uin;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received typing notification\n");
memcpy(&uin, &n->uin, sizeof(uin_t));
ge->type = GG_EVENT_TYPING_NOTIFICATION;
ge->event.typing_notification.uin = gg_fix32(uin);
ge->event.typing_notification.length = gg_fix16(n->length);
return 0;
}
/**
* \internal Obsługuje pakiet GG_MULTILOGON_INFO.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_multilogon_info(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
char *packet_end = (char*) ptr + len;
struct gg_multilogon_info *info = (struct gg_multilogon_info*) ptr;
char *p = (char*) ptr + sizeof(*info);
struct gg_multilogon_session *sessions = NULL;
size_t count;
size_t i;
int res = 0;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received multilogon info\n");
count = gg_fix32(info->count);
if (count > 0xffff) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_multilogon_info() malformed packet (1)\n");
goto malformed;
}
sessions = calloc(count, sizeof(struct gg_multilogon_session));
if (sessions == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_multilogon_info() out of memory (%d*%d)\n", count, sizeof(struct gg_multilogon_session));
return -1;
}
ge->type = GG_EVENT_MULTILOGON_INFO;
ge->event.multilogon_info.count = count;
ge->event.multilogon_info.sessions = sessions;
for (i = 0; i < count; i++) {
struct gg_multilogon_info_item item;
size_t name_size;
if (p + sizeof(item) > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_multilogon_info() malformed packet (2)\n");
goto malformed;
}
memcpy(&item, p, sizeof(item));
sessions[i].id = item.conn_id;
sessions[i].remote_addr = item.addr;
sessions[i].status_flags = gg_fix32(item.flags);
sessions[i].protocol_features = gg_fix32(item.features);
sessions[i].logon_time = gg_fix32(item.logon_time);
p += sizeof(item);
name_size = gg_fix32(item.name_size);
if (name_size > 0xffff || p + name_size > packet_end) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_multilogon_info() malformed packet (3)\n");
goto malformed;
}
sessions[i].name = malloc(name_size + 1);
if (sessions[i].name == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_multilogon_info() out of memory (%d)\n", name_size);
goto fail;
}
memcpy(sessions[i].name, p, name_size);
sessions[i].name[name_size] = 0;
p += name_size;
}
return 0;
fail:
res = -1;
malformed:
ge->type = GG_EVENT_NONE;
for (i = 0; i < ge->event.multilogon_info.count; i++)
free(ge->event.multilogon_info.sessions[i].name);
free(ge->event.multilogon_info.sessions);
return res;
}
/**
* \internal Obsługuje pakiet GG_USERLIST100_VERSION.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_userlist_100_version(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_userlist100_version *version = (struct gg_userlist100_version*) ptr;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received userlist 100 version\n");
ge->type = GG_EVENT_USERLIST100_VERSION;
ge->event.userlist100_version.version = gg_fix32(version->version);
return 0;
}
/**
* \internal Obsługuje pakiet GG_USERLIST100_REPLY.
*
* Patrz gg_packet_handler_t
*/
static int gg_session_handle_userlist_100_reply(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
struct gg_userlist100_reply *reply = (struct gg_userlist100_reply*) ptr;
char *data = NULL;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_watch_fd_connected() received userlist 100 reply\n");
if (len > sizeof(*reply)) {
data = gg_inflate((const unsigned char*) ptr + sizeof(*reply), len - sizeof(*reply));
if (data == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_handle_userlist_100_reply() gg_inflate() failed\n");
return -1;
}
}
ge->type = GG_EVENT_USERLIST100_REPLY;
ge->event.userlist100_reply.type = reply->type;
ge->event.userlist100_reply.version = gg_fix32(reply->version);
ge->event.userlist100_reply.format_type = reply->format_type;
ge->event.userlist100_reply.reply = data;
return 0;
}
/**
* \internal Tablica obsługiwanych pakietów
*/
static const gg_packet_handler_t handlers[] =
{
{ GG_WELCOME, GG_STATE_READING_KEY, 0, gg_session_handle_welcome },
{ GG_LOGIN_OK, GG_STATE_READING_REPLY, 0, gg_session_handle_login_ok },
{ GG_LOGIN80_OK, GG_STATE_READING_REPLY, 0, gg_session_handle_login_ok },
{ GG_NEED_EMAIL, GG_STATE_READING_REPLY, 0, gg_session_handle_login_ok },
{ GG_LOGIN_FAILED, GG_STATE_READING_REPLY, 0, gg_session_handle_login_failed },
{ GG_LOGIN80_FAILED, GG_STATE_READING_REPLY, 0, gg_session_handle_login_failed },
{ GG_SEND_MSG_ACK, GG_STATE_CONNECTED, sizeof(struct gg_send_msg_ack), gg_session_handle_send_msg_ack },
{ GG_PONG, GG_STATE_CONNECTED, 0, gg_session_handle_pong },
{ GG_DISCONNECTING, GG_STATE_CONNECTED, 0, gg_session_handle_disconnecting },
{ GG_DISCONNECT_ACK, GG_STATE_DISCONNECTING, 0, gg_session_handle_disconnect_ack },
{ GG_XML_EVENT, GG_STATE_CONNECTED, 0, gg_session_handle_xml_event },
{ GG_PUBDIR50_REPLY, GG_STATE_CONNECTED, 0, gg_session_handle_pubdir50_reply },
{ GG_USERLIST_REPLY, GG_STATE_CONNECTED, sizeof(char), gg_session_handle_userlist_reply },
{ GG_DCC7_ID_REPLY, GG_STATE_CONNECTED, sizeof(struct gg_dcc7_id_reply), gg_session_handle_dcc7_id_reply },
{ GG_DCC7_ACCEPT, GG_STATE_CONNECTED, sizeof(struct gg_dcc7_accept), gg_session_handle_dcc7_accept },
{ GG_DCC7_NEW, GG_STATE_CONNECTED, sizeof(struct gg_dcc7_new), gg_session_handle_dcc7_new },
{ GG_DCC7_REJECT, GG_STATE_CONNECTED, sizeof(struct gg_dcc7_reject), gg_session_handle_dcc7_reject },
{ GG_DCC7_INFO, GG_STATE_CONNECTED, sizeof(struct gg_dcc7_info), gg_session_handle_dcc7_info },
{ GG_RECV_MSG, GG_STATE_CONNECTED, sizeof(struct gg_recv_msg), gg_session_handle_recv_msg },
{ GG_RECV_MSG80, GG_STATE_CONNECTED, sizeof(struct gg_recv_msg80), gg_session_handle_recv_msg_80 },
{ GG_STATUS, GG_STATE_CONNECTED, sizeof(struct gg_status), gg_session_handle_status },
{ GG_STATUS60, GG_STATE_CONNECTED, sizeof(struct gg_status60), gg_session_handle_status_60_77_80beta },
{ GG_STATUS77, GG_STATE_CONNECTED, sizeof(struct gg_status77), gg_session_handle_status_60_77_80beta },
{ GG_STATUS80BETA, GG_STATE_CONNECTED, sizeof(struct gg_status77), gg_session_handle_status_60_77_80beta },
{ GG_STATUS80, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply80), gg_session_handle_status_80 },
{ GG_NOTIFY_REPLY, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply), gg_session_handle_notify_reply },
{ GG_NOTIFY_REPLY60, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply60), gg_session_handle_notify_reply_60 },
{ GG_NOTIFY_REPLY77, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply77), gg_session_handle_notify_reply_77_80beta },
{ GG_NOTIFY_REPLY80BETA, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply77), gg_session_handle_notify_reply_77_80beta },
{ GG_NOTIFY_REPLY80, GG_STATE_CONNECTED, sizeof(struct gg_notify_reply80), gg_session_handle_notify_reply_80 },
{ GG_USER_DATA, GG_STATE_CONNECTED, sizeof(struct gg_user_data), gg_session_handle_user_data },
{ GG_TYPING_NOTIFICATION, GG_STATE_CONNECTED, sizeof(struct gg_typing_notification), gg_session_handle_typing_notification },
{ GG_MULTILOGON_INFO, GG_STATE_CONNECTED, sizeof(struct gg_multilogon_info), gg_session_handle_multilogon_info },
{ GG_XML_ACTION, GG_STATE_CONNECTED, 0, gg_session_handle_xml_event },
{ GG_RECV_OWN_MSG, GG_STATE_CONNECTED, sizeof(struct gg_recv_msg80), gg_session_handle_recv_msg_80 },
{ GG_USERLIST100_VERSION, GG_STATE_CONNECTED, sizeof(struct gg_userlist100_version), gg_session_handle_userlist_100_version },
{ GG_USERLIST100_REPLY, GG_STATE_CONNECTED, sizeof(struct gg_userlist100_reply), gg_session_handle_userlist_100_reply },
};
/**
* \internal Analizuje przychodzący pakiet danych.
*
* \param gs Struktura sesji
* \param type Typ pakietu
* \param ptr Wskaźnik do bufora pakietu
* \param len Długość bufora pakietu
* \param[out] ge Struktura zdarzenia
*
* \return 0 jeśli się powiodło, -1 w przypadku błędu
*/
int gg_session_handle_packet(struct gg_session *gs, uint32_t type, const char *ptr, size_t len, struct gg_event *ge)
{
int i;
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_packet(%d, %p, %d)\n", type, ptr, len);
gs->last_event = time(NULL);
#if 0
if ((gs->flags & (1 << GG_SESSION_FLAG_RAW_PACKET)) != 0) {
char *tmp;
tmp = malloc(len);
if (tmp == NULL) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_packet() out of memory (%d bytes)\n", len);
return -1;
}
memcpy(tmp, ptr, len);
ge->type = GG_EVENT_RAW_PACKET;
ge->event.raw_packet.type = type;
ge->event.raw_packet.length = len;
ge->event.raw_packet.data = tmp;
return 0;
}
#endif
for (i = 0; i < sizeof(handlers) / sizeof(handlers[0]); i++) {
if (handlers[i].type != 0 && handlers[i].type != type)
continue;
if (handlers[i].state != 0 && handlers[i].state != gs->state) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_packet() packet 0x%02x unexpected in state %d\n", type, gs->state);
continue;
}
if (len < handlers[i].min_length) {
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_packet() packet 0x%02x too short (%d bytes)\n", type, len);
continue;
}
return (*handlers[i].handler)(gs, type, ptr, len, ge);
}
gg_debug_session(gs, GG_DEBUG_MISC, "// gg_session_handle_packet() unhandled packet 0x%02x, len %d, state %d\n", type, len, gs->state);
return 0;
}