diff options
Diffstat (limited to 'protocols/Gadu-Gadu/libgadu/dcc7.c')
| -rw-r--r-- | protocols/Gadu-Gadu/libgadu/dcc7.c | 1655 |
1 files changed, 1655 insertions, 0 deletions
diff --git a/protocols/Gadu-Gadu/libgadu/dcc7.c b/protocols/Gadu-Gadu/libgadu/dcc7.c new file mode 100644 index 0000000000..f3813e6e83 --- /dev/null +++ b/protocols/Gadu-Gadu/libgadu/dcc7.c @@ -0,0 +1,1655 @@ +/* coding: UTF-8 */
+/* $Id: dcc7.c,v 1.2 2007-07-20 23:00:49 wojtekka Exp $ */
+
+/*
+ * (C) Copyright 2001-2010 Wojtek Kaniewski <wojtekka@irc.pl>
+ * Tomasz Chiliński <chilek@chilan.com>
+ * Adam Wysocki <gophi@ekg.chmurka.net>
+ * Bartłomiej Zimoń <uzi18@o2.pl>
+ *
+ * Thanks to Jakub Zawadzki <darkjames@darkjames.ath.cx>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110,
+ * USA.
+ */
+
+/**
+ * \file dcc7.c
+ *
+ * \brief Obsługa połączeń bezpośrednich od wersji Gadu-Gadu 7.x
+ */
+
+#ifndef _WIN64
+#define _USE_32BIT_TIME_T
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef _WIN32
+#include "win32.h"
+#else
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#ifdef sun
+# include <sys/filio.h>
+#endif
+#endif /* _WIN32 */
+#include <time.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+
+#include "compat.h"
+#include "libgadu.h"
+#include "protocol.h"
+#include "resolver.h"
+#include "internal.h"
+
+/**
+ * \internal Dodaje połączenie bezpośrednie do sesji.
+ *
+ * \param sess Struktura sesji
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_session_add(struct gg_session *sess, struct gg_dcc7 *dcc)
+{
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_session_add(%p, %p)\n", sess, dcc);
+
+ if (!sess || !dcc || dcc->next) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_session_add() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ dcc->next = sess->dcc7_list;
+ sess->dcc7_list = dcc;
+
+ return 0;
+}
+
+/**
+ * \internal Usuwa połączenie bezpośrednie z sesji.
+ *
+ * \param sess Struktura sesji
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_session_remove(struct gg_session *sess, struct gg_dcc7 *dcc)
+{
+ struct gg_dcc7 *tmp;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_session_remove(%p, %p)\n", sess, dcc);
+
+ if (sess == NULL || dcc == NULL) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_session_remove() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (sess->dcc7_list == dcc) {
+ sess->dcc7_list = dcc->next;
+ dcc->next = NULL;
+ return 0;
+ }
+
+ for (tmp = sess->dcc7_list; tmp != NULL; tmp = tmp->next) {
+ if (tmp->next == dcc) {
+ tmp->next = dcc->next;
+ dcc->next = NULL;
+ return 0;
+ }
+ }
+
+ errno = ENOENT;
+ return -1;
+}
+
+/**
+ * \internal Zwraca strukturę połączenia o danym identyfikatorze.
+ *
+ * \param sess Struktura sesji
+ * \param id Identyfikator połączenia
+ * \param uin Numer nadawcy lub odbiorcy
+ *
+ * \return Struktura połączenia lub \c NULL jeśli nie znaleziono
+ */
+static struct gg_dcc7 *gg_dcc7_session_find(struct gg_session *sess, gg_dcc7_id_t id, uin_t uin)
+{
+ struct gg_dcc7 *tmp;
+ int empty;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_session_find(%p, ..., %d)\n", sess, (int) uin);
+
+ empty = !memcmp(&id, "\0\0\0\0\0\0\0\0", 8);
+
+ for (tmp = sess->dcc7_list; tmp; tmp = tmp->next) {
+ if (empty) {
+ if (tmp->peer_uin == uin && !tmp->state == GG_STATE_WAITING_FOR_ACCEPT)
+ return tmp;
+ } else {
+ if (!memcmp(&tmp->cid, &id, sizeof(id)))
+ return tmp;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * \internal Rozpoczyna proces pobierania adresu
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_get_relay_addr(struct gg_dcc7 *dcc)
+{
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_get_relay_addr(%p)\n", dcc);
+
+ if (dcc == NULL || dcc->sess == NULL) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_get_relay_addr() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (dcc->sess->resolver_start(&dcc->fd, &dcc->resolver, GG_RELAY_HOST) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_get_relay_addr() resolving failed (errno=%d, %s)\n", errno, strerror(errno));
+ return -1;
+ }
+
+ dcc->state = GG_STATE_RESOLVING_RELAY;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+
+ return 0;
+}
+
+/**
+ * \internal Nawiązuje połączenie bezpośrednie
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_connect(struct gg_dcc7 *dcc)
+{
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_connect(%p)\n", dcc);
+
+ if (dcc == NULL) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_connect() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((dcc->fd = gg_connect(&dcc->remote_addr, dcc->remote_port, 1)) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_connect() connection failed\n");
+ return -1;
+ }
+
+ dcc->state = GG_STATE_CONNECTING;
+ dcc->check = GG_CHECK_WRITE;
+ dcc->timeout = GG_DCC7_TIMEOUT_CONNECT;
+ dcc->soft_timeout = 1;
+
+ return 0;
+}
+
+/**
+ * \internal Tworzy gniazdo nasłuchujące dla połączenia bezpośredniego
+ *
+ * \param dcc Struktura połączenia
+ * \param port Preferowany port (jeśli równy 0 lub -1, próbuje się domyślnego)
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_listen(struct gg_dcc7 *dcc, uint16_t port)
+{
+ struct sockaddr_in sin;
+ SOCKET fd;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_listen(%p, %d)\n", dcc, port);
+
+ if (!dcc) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_listen() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_listen() can't create socket (%s)\n", strerror(errno));
+ return -1;
+ }
+
+ // XXX losować porty?
+
+ if (!port)
+ port = GG_DEFAULT_DCC_PORT;
+
+ while (1) {
+ sin.sin_family = AF_INET;
+ sin.sin_addr.s_addr = INADDR_ANY;
+ sin.sin_port = htons(port);
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_listen() trying port %d\n", port);
+
+ if (!bind(fd, (struct sockaddr*) &sin, sizeof(sin)))
+ break;
+
+ if (port++ == 65535) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_listen() no free port found\n");
+ gg_sock_close(fd);
+ errno = ENOENT;
+ return -1;
+ }
+ }
+
+ if (listen(fd, 1)) {
+ int errsv = errno;
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_listen() unable to listen (%s)\n", strerror(errno));
+ gg_sock_close(fd);
+ errno = errsv;
+ return -1;
+ }
+
+ dcc->fd = fd;
+ dcc->local_port = port;
+
+ dcc->state = GG_STATE_LISTENING;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DCC7_TIMEOUT_FILE_ACK;
+
+ return 0;
+}
+
+/**
+ * \internal Tworzy gniazdo nasłuchujące i wysyła jego parametry
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_listen_and_send_info(struct gg_dcc7 *dcc)
+{
+ struct gg_dcc7_info pkt;
+ uint16_t external_port;
+ uint16_t local_port;
+ uint32_t count;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_listen_and_send_info(%p)\n", dcc);
+
+ if (!dcc->sess->client_port)
+ local_port = dcc->sess->external_port;
+ else
+ local_port = dcc->sess->client_port;
+
+ if (gg_dcc7_listen(dcc, local_port) == -1)
+ return -1;
+
+ if (!dcc->sess->external_port || dcc->local_port != local_port)
+ external_port = dcc->local_port;
+ else
+ external_port = dcc->sess->external_port;
+
+ if (!dcc->sess->external_addr || dcc->local_port != local_port)
+ dcc->local_addr = dcc->sess->client_addr;
+ else
+ dcc->local_addr = dcc->sess->external_addr;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// dcc7_listen_and_send_info() sending IP address %s and port %d\n", inet_ntoa(*((struct in_addr*) &dcc->local_addr)), external_port);
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.uin = gg_fix32(dcc->peer_uin);
+ pkt.type = GG_DCC7_TYPE_P2P;
+ pkt.id = dcc->cid;
+ snprintf((char*) pkt.info, sizeof(pkt.info), "%s %d", inet_ntoa(*((struct in_addr*) &dcc->local_addr)), external_port);
+ // TODO: implement hash count
+ // we MUST fill hash to recive from server request for server connection
+ //snprintf((char*) pkt.hash, sizeof(pkt.hash), "0");
+ count = dcc->local_addr + external_port * rand();
+ snprintf((char*) pkt.hash, sizeof(pkt.hash), "%d", count);
+
+ return gg_send_packet(dcc->sess, GG_DCC7_INFO, &pkt, sizeof(pkt), NULL);
+}
+
+/**
+ * \internal Odwraca połączenie po nieudanym connect()
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_reverse_connect(struct gg_dcc7 *dcc)
+{
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_reverse_connect(%p)\n", dcc);
+
+ if (dcc->reverse) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_reverse_connect() already reverse connection\n");
+ return -1;
+ }
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_reverse_connect() timeout, trying reverse connection\n");
+ gg_sock_close(dcc->fd);
+ dcc->fd = -1;
+ dcc->reverse = 1;
+
+ return gg_dcc7_listen_and_send_info(dcc);
+}
+
+/**
+ * \internal Wysyła do serwera żądanie nadania identyfikatora sesji
+ *
+ * \param sess Struktura sesji
+ * \param type Rodzaj połączenia (\c GG_DCC7_TYPE_FILE lub \c GG_DCC7_TYPE_VOICE)
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+static int gg_dcc7_request_id(struct gg_session *sess, uint32_t type)
+{
+ struct gg_dcc7_id_request pkt;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_request_id(%p, %d)\n", sess, type);
+
+ if (!sess) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() invalid parameters\n");
+ errno = EFAULT;
+ return -1;
+ }
+
+ if (sess->state != GG_STATE_CONNECTED) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() not connected\n");
+ errno = ENOTCONN;
+ return -1;
+ }
+
+ if (type != GG_DCC7_TYPE_VOICE && type != GG_DCC7_TYPE_FILE) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_request_id() invalid transfer type (%d)\n", type);
+ errno = EINVAL;
+ return -1;
+ }
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.type = gg_fix32(type);
+
+ return gg_send_packet(sess, GG_DCC7_ID_REQUEST, &pkt, sizeof(pkt), NULL);
+}
+
+/**
+ * \internal Rozpoczyna wysyłanie pliku.
+ *
+ * Funkcja jest wykorzystywana przez \c gg_dcc7_send_file() oraz
+ * \c gg_dcc_send_file_fd().
+ *
+ * \param sess Struktura sesji
+ * \param rcpt Numer odbiorcy
+ * \param fd Deskryptor pliku
+ * \param size Rozmiar pliku
+ * \param filename1250 Nazwa pliku w kodowaniu CP-1250
+ * \param hash Skrót SHA-1 pliku
+ * \param seek Flaga mówiąca, czy można używać lseek()
+ *
+ * \return Struktura \c gg_dcc7 lub \c NULL w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+static struct gg_dcc7 *gg_dcc7_send_file_common(struct gg_session *sess, uin_t rcpt, int fd, size_t size, const char *filename1250, const char *hash, int seek)
+{
+ struct gg_dcc7 *dcc = NULL;
+
+ if (!sess || !rcpt || !filename1250 || !hash || fd == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file_common() invalid parameters\n");
+ errno = EINVAL;
+ goto fail;
+ }
+
+ if (!(dcc = malloc(sizeof(struct gg_dcc7)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file_common() not enough memory\n");
+ goto fail;
+ }
+
+ if (gg_dcc7_request_id(sess, GG_DCC7_TYPE_FILE) == -1)
+ goto fail;
+
+ memset(dcc, 0, sizeof(struct gg_dcc7));
+ dcc->type = GG_SESSION_DCC7_SEND;
+ dcc->dcc_type = GG_DCC7_TYPE_FILE;
+ dcc->state = GG_STATE_REQUESTING_ID;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ dcc->sess = sess;
+ dcc->fd = -1;
+ dcc->uin = sess->uin;
+ dcc->peer_uin = rcpt;
+ dcc->file_fd = fd;
+ dcc->size = (unsigned int)size;
+ dcc->seek = seek;
+
+ strncpy((char*) dcc->filename, filename1250, GG_DCC7_FILENAME_LEN - 1);
+ dcc->filename[GG_DCC7_FILENAME_LEN] = 0;
+
+ memcpy(dcc->hash, hash, GG_DCC7_HASH_LEN);
+
+ if (gg_dcc7_session_add(sess, dcc) == -1)
+ goto fail;
+
+ return dcc;
+
+fail:
+ free(dcc);
+ return NULL;
+}
+
+/**
+ * Rozpoczyna wysyłanie pliku o danej nazwie.
+ *
+ * \param sess Struktura sesji
+ * \param rcpt Numer odbiorcy
+ * \param filename Nazwa pliku w lokalnym systemie plików
+ * \param filename1250 Nazwa pliku w kodowaniu CP-1250
+ * \param hash Skrót SHA-1 pliku (lub \c NULL jeśli ma być wyznaczony)
+ *
+ * \return Struktura \c gg_dcc7 lub \c NULL w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+struct gg_dcc7 *gg_dcc7_send_file(struct gg_session *sess, uin_t rcpt, const char *filename, const char *filename1250, const char *hash)
+{
+ struct gg_dcc7 *dcc = NULL;
+ const char *tmp;
+ char hash_buf[GG_DCC7_HASH_LEN];
+ struct stat st;
+ int fd = -1;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_send_file(%p, %d, \"%s\", %p)\n", sess, rcpt, filename, hash);
+
+ if (!sess || !rcpt || !filename) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file() invalid parameters\n");
+ errno = EINVAL;
+ goto fail;
+ }
+
+ if (!filename1250)
+ filename1250 = filename;
+
+ if (stat(filename, &st) == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file() stat() failed (%s)\n", strerror(errno));
+ goto fail;
+ }
+
+ if ((st.st_mode & S_IFDIR)) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file() that's a directory\n");
+ errno = EINVAL;
+ goto fail;
+ }
+
+ if ((fd = open(filename, O_RDONLY | O_BINARY)) == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_send_file() open() failed (%s)\n", strerror(errno));
+ goto fail;
+ }
+
+ if (!hash) {
+ if (gg_file_hash_sha1(fd, (uint8_t*) hash_buf) == -1)
+ goto fail;
+
+ hash = hash_buf;
+ }
+
+#ifdef _WIN32
+ if ((tmp = strrchr(filename1250, '\\')))
+#else
+ if ((tmp = strrchr(filename1250, '/')))
+#endif
+ filename1250 = tmp + 1;
+
+ if (!(dcc = gg_dcc7_send_file_common(sess, rcpt, fd, st.st_size, filename1250, hash, 1)))
+ goto fail;
+
+ return dcc;
+
+fail:
+ if (fd != -1) {
+ int errsv = errno;
+ close(fd);
+ errno = errsv;
+ }
+
+ free(dcc);
+ return NULL;
+}
+
+/**
+ * \internal Rozpoczyna wysyłanie pliku o danym deskryptorze.
+ *
+ * \note Wysyłanie pliku nie będzie działać poprawnie, jeśli deskryptor
+ * źródłowy jest w trybie nieblokującym i w pewnym momencie zabraknie danych.
+ *
+ * \param sess Struktura sesji
+ * \param rcpt Numer odbiorcy
+ * \param fd Deskryptor pliku
+ * \param size Rozmiar pliku
+ * \param filename1250 Nazwa pliku w kodowaniu CP-1250
+ * \param hash Skrót SHA-1 pliku
+ *
+ * \return Struktura \c gg_dcc7 lub \c NULL w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+struct gg_dcc7 *gg_dcc7_send_file_fd(struct gg_session *sess, uin_t rcpt, int fd, size_t size, const char *filename1250, const char *hash)
+{
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_send_file_fd(%p, %d, %d, %u, \"%s\", %p)\n", sess, rcpt, fd, size, filename1250, hash);
+
+ return gg_dcc7_send_file_common(sess, rcpt, fd, size, filename1250, hash, 0);
+}
+
+
+/**
+ * Potwierdza chęć odebrania pliku.
+ *
+ * \param dcc Struktura połączenia
+ * \param offset Początkowy offset przy wznawianiu przesyłania pliku
+ *
+ * \note Biblioteka nie zmienia położenia w odbieranych plikach. Jeśli offset
+ * początkowy jest różny od zera, należy ustawić go funkcją \c lseek() lub
+ * podobną.
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+int gg_dcc7_accept(struct gg_dcc7 *dcc, unsigned int offset)
+{
+ struct gg_dcc7_accept pkt;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_accept(%p, %d)\n", dcc, offset);
+
+ if (!dcc || !dcc->sess) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_accept() invalid parameters\n");
+ errno = EFAULT;
+ return -1;
+ }
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.uin = gg_fix32(dcc->peer_uin);
+ pkt.id = dcc->cid;
+ pkt.offset = gg_fix32(offset);
+
+ if (gg_send_packet(dcc->sess, GG_DCC7_ACCEPT, &pkt, sizeof(pkt), NULL) == -1)
+ return -1;
+
+ dcc->offset = offset;
+
+ return gg_dcc7_listen_and_send_info(dcc);
+}
+
+/**
+ * Odrzuca próbę przesłania pliku.
+ *
+ * \param dcc Struktura połączenia
+ * \param reason Powód odrzucenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+int gg_dcc7_reject(struct gg_dcc7 *dcc, int reason)
+{
+ struct gg_dcc7_reject pkt;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_reject(%p, %d)\n", dcc, reason);
+
+ if (!dcc || !dcc->sess) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_reject() invalid parameters\n");
+ errno = EFAULT;
+ return -1;
+ }
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.uin = gg_fix32(dcc->peer_uin);
+ pkt.id = dcc->cid;
+ pkt.reason = gg_fix32(reason);
+
+ return gg_send_packet(dcc->sess, GG_DCC7_REJECT, &pkt, sizeof(pkt), NULL);
+}
+
+/**
+ * Przerwanie żądania przesłania pliku.
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ *
+ * \ingroup dcc7
+ */
+int gg_dcc7_abort(struct gg_dcc7 *dcc)
+{
+ struct gg_dcc7_abort pkt;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_abort(%p)\n", dcc);
+
+ if (!dcc || !dcc->sess) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_abort() invalid parameters\n");
+ errno = EFAULT;
+ return -1;
+ }
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.id = dcc->cid;
+ pkt.uin_from = gg_fix32(dcc->uin);
+ pkt.uin_to = gg_fix32(dcc->peer_uin);
+
+ return gg_send_packet(dcc->sess, GG_DCC7_ABORT, &pkt, sizeof(pkt), NULL);
+}
+
+/**
+ * \internal Obsługuje pakiet identyfikatora połączenia bezpośredniego.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_id(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_id_reply *p = payload;
+ struct gg_dcc7 *tmp;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_id(%p, %p, %p, %d)\n", sess, e, payload, len);
+
+ for (tmp = sess->dcc7_list; tmp; tmp = tmp->next) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// checking dcc %p, state %d, type %d\n", tmp, tmp->state, tmp->dcc_type);
+
+ if (tmp->state != GG_STATE_REQUESTING_ID || tmp->dcc_type != (int)gg_fix32(p->type))
+ continue;
+
+ tmp->cid = p->id;
+
+ switch (tmp->dcc_type) {
+ case GG_DCC7_TYPE_FILE:
+ {
+ struct gg_dcc7_new s;
+
+ memset(&s, 0, sizeof(s));
+ s.id = tmp->cid;
+ s.type = gg_fix32(GG_DCC7_TYPE_FILE);
+ s.uin_from = gg_fix32(tmp->uin);
+ s.uin_to = gg_fix32(tmp->peer_uin);
+ s.size = gg_fix32(tmp->size);
+
+ strncpy((char*) s.filename, (char*) tmp->filename, GG_DCC7_FILENAME_LEN);
+
+ tmp->state = GG_STATE_WAITING_FOR_ACCEPT;
+ tmp->timeout = GG_DCC7_TIMEOUT_FILE_ACK;
+
+ return gg_send_packet(sess, GG_DCC7_NEW, &s, sizeof(s), NULL);
+ }
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * \internal Obsługuje pakiet akceptacji połączenia bezpośredniego.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_accept(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_accept *p = payload;
+ struct gg_dcc7 *dcc;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_accept(%p, %p, %p, %d)\n", sess, e, payload, len);
+
+ if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_accept() unknown dcc session\n");
+ // XXX wysłać reject?
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ if (dcc->state != GG_STATE_WAITING_FOR_ACCEPT) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_accept() invalid state\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ // XXX czy dla odwrotnego połączenia powinniśmy wywołać już zdarzenie GG_DCC7_ACCEPT?
+
+ dcc->offset = gg_fix32(p->offset);
+ dcc->state = GG_STATE_WAITING_FOR_INFO;
+
+ return 0;
+}
+
+/**
+ * \internal Obsługuje pakiet informacji o połączeniu bezpośrednim.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_info(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_info *p = payload;
+ struct gg_dcc7 *dcc;
+ char *tmp;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_info(%p, %p, %p, %d)\n", sess, e, payload, len);
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "// gg_dcc7_handle_info() received address: %s, hash: %s\n", p->info, p->hash);
+
+ if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unknown dcc session\n");
+ return 0;
+ }
+
+ if (dcc->state == GG_STATE_CONNECTED) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() state is already connected\n");
+ return 0;
+ }
+
+ switch (p->type)
+ {
+ case GG_DCC7_TYPE_P2P:
+ if ((dcc->remote_addr = inet_addr(p->info)) == INADDR_NONE) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP address\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ if (!(tmp = strchr(p->info, ' ')) || !(dcc->remote_port = atoi(tmp + 1))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid IP port\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ if (dcc->state == GG_STATE_WAITING_FOR_INFO) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() wainting for info so send one\n");
+ gg_dcc7_listen_and_send_info(dcc);
+ return 0;
+ }
+
+ break;
+
+ case GG_DCC7_TYPE_SERVER:
+ if (!(tmp = strstr(p->info, "GG"))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unknown info packet\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+#if defined(GG_CONFIG_HAVE_UINT64_T) && defined(GG_CONFIG_HAVE_STRTOULL)
+ {
+ uint64_t cid;
+
+ cid = strtoull(tmp + 2, NULL, 0);
+
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() info.str=%s, info.id=%llu, sess.id=%llu\n", tmp + 2, cid, *((unsigned long long*) &dcc->cid));
+
+ cid = gg_fix64(cid);
+
+ if (memcmp(&dcc->cid, &cid, sizeof(cid)) != 0) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid session id\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+ }
+#endif
+
+ if (gg_dcc7_get_relay_addr(dcc) == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unable to retrieve relay address\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ // XXX wysyłać dopiero jeśli uda się połączyć z serwerem?
+
+ gg_send_packet(dcc->sess, GG_DCC7_INFO, payload, len, NULL);
+
+ break;
+
+ default:
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() unhandled transfer type (%d)\n", p->type);
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ // jeśli nadal czekamy na połączenie przychodzące, a druga strona nie
+ // daje rady i oferuje namiary na siebie, bierzemy co dają.
+
+// if (dcc->state != GG_STATE_WAITING_FOR_INFO && (dcc->state != GG_STATE_LISTENING || dcc->reverse)) {
+// gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_info() invalid state\n");
+// e->type = GG_EVENT_DCC7_ERROR;
+// e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+// e->event.dcc7_error_ex.dcc7 = dcc;
+// return 0;
+// }
+
+ if (dcc->state == GG_STATE_LISTENING) {
+ gg_sock_close(dcc->fd);
+ dcc->fd = -1;
+ dcc->reverse = 1;
+ }
+
+ if (dcc->type == GG_SESSION_DCC7_SEND) {
+ e->type = GG_EVENT_DCC7_ACCEPT;
+ e->event.dcc7_accept.dcc7 = dcc;
+ e->event.dcc7_accept.type = gg_fix32(p->type);
+ e->event.dcc7_accept.remote_ip = dcc->remote_addr;
+ e->event.dcc7_accept.remote_port = dcc->remote_port;
+ } else {
+ e->type = GG_EVENT_DCC7_PENDING;
+ e->event.dcc7_pending.dcc7 = dcc;
+ }
+
+ if (dcc->state == GG_STATE_RESOLVING_RELAY)
+ return 0;
+
+ if (gg_dcc7_connect(dcc) == -1) {
+ if (gg_dcc7_reverse_connect(dcc) == -1) {
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_NET;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * \internal Obsługuje pakiet odrzucenia połączenia bezpośredniego.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_reject(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_reject *p = payload;
+ struct gg_dcc7 *dcc;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_reject(%p, %p, %p, %d)\n", sess, e, payload, len);
+
+ if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(p->uin)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_reject() unknown dcc session\n");
+ return 0;
+ }
+
+ if (dcc->state != GG_STATE_WAITING_FOR_ACCEPT) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_reject() invalid state\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ e->type = GG_EVENT_DCC7_REJECT;
+ e->event.dcc7_reject.dcc7 = dcc;
+ e->event.dcc7_reject.reason = gg_fix32(p->reason);
+
+ // XXX ustawić state na rejected?
+
+ return 0;
+}
+
+/**
+ * \internal Obsługuje pakiet przerwania żądania połączenia bezpośredniego.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_abort(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_aborted *p = payload;
+ struct gg_dcc7 *dcc;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_abort(%p, %p, %p, %d)\n", sess, e, payload, len);
+
+ if (!(dcc = gg_dcc7_session_find(sess, p->id, gg_fix32(0)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() unknown dcc session\n");
+ return 0;
+ }
+
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() state %d\n", dcc->state);
+
+ if (dcc->state != GG_STATE_IDLE) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_abort() invalid state\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return 0;
+ }
+
+ e->type = GG_EVENT_DCC7_REJECT;
+ e->event.dcc7_reject.dcc7 = dcc;
+ e->event.dcc7_reject.reason = gg_fix32(GG_DCC7_REJECT_USER);
+
+ // XXX ustawić state na rejected?
+
+ return 0;
+}
+
+/**
+ * \internal Obsługuje pakiet nowego połączenia bezpośredniego.
+ *
+ * \param sess Struktura sesji
+ * \param e Struktura zdarzenia
+ * \param payload Treść pakietu
+ * \param len Długość pakietu
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu
+ */
+int gg_dcc7_handle_new(struct gg_session *sess, struct gg_event *e, void *payload, int len)
+{
+ struct gg_dcc7_new *p = payload;
+ struct gg_dcc7 *dcc;
+
+ gg_debug_session(sess, GG_DEBUG_FUNCTION, "** gg_dcc7_handle_new(%p, %p, %p, %d)\n", sess, e, payload, len);
+
+ switch (gg_fix32(p->type)) {
+ case GG_DCC7_TYPE_FILE:
+ if (!(dcc = malloc(sizeof(struct gg_dcc7)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() not enough memory\n");
+ return -1;
+ }
+
+ memset(dcc, 0, sizeof(struct gg_dcc7));
+ dcc->type = GG_SESSION_DCC7_GET;
+ dcc->dcc_type = GG_DCC7_TYPE_FILE;
+ dcc->fd = -1;
+ dcc->file_fd = -1;
+ dcc->uin = sess->uin;
+ dcc->peer_uin = gg_fix32(p->uin_from);
+ dcc->cid = p->id;
+ dcc->sess = sess;
+
+ if (gg_dcc7_session_add(sess, dcc) == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unable to add to session\n");
+ gg_dcc7_free(dcc);
+ return -1;
+ }
+
+ dcc->size = gg_fix32(p->size);
+ strncpy((char*) dcc->filename, (char*) p->filename, GG_DCC7_FILENAME_LEN - 1);
+ dcc->filename[GG_DCC7_FILENAME_LEN] = 0;
+ memcpy(dcc->hash, p->hash, GG_DCC7_HASH_LEN);
+
+ e->type = GG_EVENT_DCC7_NEW;
+ e->event.dcc7_new = dcc;
+
+ break;
+
+ case GG_DCC7_TYPE_VOICE:
+ if (!(dcc = malloc(sizeof(struct gg_dcc7)))) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_packet() not enough memory\n");
+ return -1;
+ }
+
+ memset(dcc, 0, sizeof(struct gg_dcc7));
+
+ dcc->type = GG_SESSION_DCC7_VOICE;
+ dcc->dcc_type = GG_DCC7_TYPE_VOICE;
+ dcc->fd = -1;
+ dcc->file_fd = -1;
+ dcc->uin = sess->uin;
+ dcc->peer_uin = gg_fix32(p->uin_from);
+ dcc->cid = p->id;
+ dcc->sess = sess;
+
+ if (gg_dcc7_session_add(sess, dcc) == -1) {
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unable to add to session\n");
+ gg_dcc7_free(dcc);
+ return -1;
+ }
+
+ e->type = GG_EVENT_DCC7_NEW;
+ e->event.dcc7_new = dcc;
+
+ break;
+
+ default:
+ gg_debug_session(sess, GG_DEBUG_MISC, "// gg_dcc7_handle_new() unknown dcc type (%d) from %ld\n", gg_fix32(p->type), gg_fix32(p->uin_from));
+
+ break;
+ }
+
+ return 0;
+}
+
+/**
+ * \internal Ustawia odpowiednie stany wewnętrzne w zależności od rodzaju
+ * połączenia.
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return 0 jeśli się powiodło, -1 w przypadku błędu.
+ */
+static int gg_dcc7_postauth_fixup(struct gg_dcc7 *dcc)
+{
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_postauth_fixup(%p)\n", dcc);
+
+ if (!dcc) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_postauth_fixup() invalid parameters\n");
+ errno = EINVAL;
+ return -1;
+ }
+
+ switch (dcc->type) {
+ case GG_SESSION_DCC7_GET:
+ dcc->state = GG_STATE_GETTING_FILE;
+ dcc->check = GG_CHECK_READ;
+ return 0;
+
+ case GG_SESSION_DCC7_SEND:
+ dcc->state = GG_STATE_SENDING_FILE;
+ dcc->check = GG_CHECK_WRITE;
+ return 0;
+
+ case GG_SESSION_DCC7_VOICE:
+ dcc->state = GG_STATE_READING_VOICE_DATA;
+ dcc->check = GG_CHECK_READ;
+ return 0;
+ }
+
+ errno = EINVAL;
+
+ return -1;
+}
+
+/**
+ * Funkcja wywoływana po zaobserwowaniu zmian na deskryptorze połączenia.
+ *
+ * Funkcja zwraca strukturę zdarzenia \c gg_event. Jeśli rodzaj zdarzenia
+ * to \c GG_EVENT_NONE, nie wydarzyło się jeszcze nic wartego odnotowania.
+ * Strukturę zdarzenia należy zwolnić funkcja \c gg_event_free().
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \return Struktura zdarzenia lub \c NULL jeśli wystąpił błąd
+ *
+ * \ingroup dcc7
+ */
+struct gg_event *gg_dcc7_watch_fd(struct gg_dcc7 *dcc)
+{
+ struct gg_event *e;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_watch_fd(%p)\n", dcc);
+
+ if (!dcc || (dcc->type != GG_SESSION_DCC7_SEND && dcc->type != GG_SESSION_DCC7_GET && dcc->type != GG_SESSION_DCC7_VOICE)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid parameters\n");
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (!(e = malloc(sizeof(struct gg_event)))) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() not enough memory\n");
+ return NULL;
+ }
+
+ memset(e, 0, sizeof(struct gg_event));
+ e->type = GG_EVENT_NONE;
+
+ switch (dcc->state) {
+ case GG_STATE_LISTENING:
+ {
+ struct sockaddr_in sin;
+ SOCKET fd;
+ int one = 1;
+ unsigned int sin_len = sizeof(sin);
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_LISTENING\n");
+
+ if ((fd = accept(dcc->fd, (struct sockaddr*) &sin, &sin_len)) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() accept() failed (%s)\n", strerror(errno));
+ return e;
+ }
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection from %s:%d\n", inet_ntoa(sin.sin_addr), htons(sin.sin_port));
+
+#ifdef FIONBIO
+ if (ioctl(fd, FIONBIO, &one) == -1) {
+#else
+ if (fcntl(fd, F_SETFL, O_NONBLOCK) == -1) {
+#endif
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() can't set nonblocking (%s)\n", strerror(errno));
+ gg_sock_close(fd);
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ gg_sock_close(dcc->fd);
+ dcc->fd = fd;
+
+ dcc->state = GG_STATE_READING_ID;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ dcc->incoming = 1;
+
+ dcc->remote_port = ntohs(sin.sin_port);
+ dcc->remote_addr = sin.sin_addr.s_addr;
+
+ e->type = GG_EVENT_DCC7_CONNECTED;
+ e->event.dcc7_connected.dcc7 = dcc;
+
+ return e;
+ }
+
+ case GG_STATE_CONNECTING:
+ {
+ int res = 0, error = 0;
+ unsigned int error_size = sizeof(error);
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_CONNECTING\n");
+
+ dcc->soft_timeout = 0;
+
+ if (dcc->timeout == 0)
+ error = ETIMEDOUT;
+
+ if (error || (res = gg_getsockopt(dcc->fd, SOL_SOCKET, SO_ERROR, &error, &error_size)) == -1 || error != 0) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (%s)\n", (res == -1) ? strerror(errno) : strerror(error));
+
+ if (dcc->relay) {
+ for (dcc->relay_index++; dcc->relay_index < dcc->relay_count; dcc->relay_index++) {
+ dcc->remote_addr = dcc->relay_list[dcc->relay_index].addr;
+ dcc->remote_port = dcc->relay_list[dcc->relay_index].port;
+
+ if (gg_dcc7_connect(dcc) == 0)
+ break;
+ }
+
+ if (dcc->relay_index >= dcc->relay_count) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() no relay available");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+ } else {
+ if (gg_dcc7_reverse_connect(dcc) != -1) {
+ e->type = GG_EVENT_DCC7_PENDING;
+ e->event.dcc7_pending.dcc7 = dcc;
+ } else {
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_NET;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ }
+
+ return e;
+ }
+ }
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connected, sending id\n");
+
+ dcc->state = GG_STATE_SENDING_ID;
+ dcc->check = GG_CHECK_WRITE;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ dcc->incoming = 0;
+
+ return e;
+ }
+
+ case GG_STATE_READING_ID:
+ {
+ int res;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_READING_ID\n");
+
+ if (!dcc->relay) {
+ struct gg_dcc7_welcome_p2p welcome, welcome_ok;
+ welcome_ok.id = dcc->cid;
+
+ if ((res = gg_sock_read(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ if (memcmp(&welcome, &welcome_ok, sizeof(welcome))) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid id\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+ } else {
+ struct gg_dcc7_welcome_server welcome, welcome_ok;
+ welcome_ok.magic = GG_DCC7_WELCOME_SERVER;
+ welcome_ok.id = dcc->cid;
+
+ if ((res = gg_sock_read(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ if (memcmp(&welcome, &welcome_ok, sizeof(welcome)) != 0) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid id\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+ }
+
+ if (dcc->incoming) {
+ dcc->state = GG_STATE_SENDING_ID;
+ dcc->check = GG_CHECK_WRITE;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ } else {
+ gg_dcc7_postauth_fixup(dcc);
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ }
+
+ return e;
+ }
+
+ case GG_STATE_SENDING_ID:
+ {
+ int res;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_SENDING_ID\n");
+
+ if (!dcc->relay) {
+ struct gg_dcc7_welcome_p2p welcome;
+
+ welcome.id = dcc->cid;
+
+ if ((res = gg_sock_write(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%d, %s)", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+ } else {
+ struct gg_dcc7_welcome_server welcome;
+
+ welcome.magic = gg_fix32(GG_DCC7_WELCOME_SERVER);
+ welcome.id = dcc->cid;
+
+ if ((res = gg_sock_write(dcc->fd, &welcome, sizeof(welcome))) != sizeof(welcome)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%d, %s)\n", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+ }
+
+ if (dcc->incoming) {
+ gg_dcc7_postauth_fixup(dcc);
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ } else {
+ dcc->state = GG_STATE_READING_ID;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+ }
+
+ return e;
+ }
+
+ case GG_STATE_SENDING_FILE:
+ {
+ char buf[1024];
+ int chunk, res;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_SENDING_FILE (offset=%d, size=%d)\n", dcc->offset, dcc->size);
+
+ if (dcc->offset >= dcc->size) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() offset >= size, finished\n");
+ e->type = GG_EVENT_DCC7_DONE;
+ e->event.dcc7_done.dcc7 = dcc;
+ return e;
+ }
+
+ if (dcc->seek && lseek(dcc->file_fd, dcc->offset, SEEK_SET) == (off_t) -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() lseek() failed (%s)\n", strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_FILE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ if ((chunk = dcc->size - dcc->offset) > sizeof(buf))
+ chunk = sizeof(buf);
+
+ if ((res = read(dcc->file_fd, buf, chunk)) < 1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (res=%d, %s)\n", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = (res == -1) ? GG_ERROR_DCC7_FILE : GG_ERROR_DCC7_EOF;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ if ((res = gg_sock_write(dcc->fd, buf, res)) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%s)\n", strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_NET;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->offset += res;
+
+ if (dcc->offset >= dcc->size) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
+ e->type = GG_EVENT_DCC7_DONE;
+ e->event.dcc7_done.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->state = GG_STATE_SENDING_FILE;
+ dcc->check = GG_CHECK_WRITE;
+ dcc->timeout = GG_DCC7_TIMEOUT_SEND;
+
+ return e;
+ }
+
+ case GG_STATE_GETTING_FILE:
+ {
+ char buf[1024];
+ int res, wres;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_GETTING_FILE (offset=%d, size=%d)\n", dcc->offset, dcc->size);
+
+ if (dcc->offset >= dcc->size) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
+ e->type = GG_EVENT_DCC7_DONE;
+ e->event.dcc7_done.dcc7 = dcc;
+ return e;
+ }
+
+ if ((res = gg_sock_read(dcc->fd, buf, sizeof(buf))) < 1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (fd=%d, res=%d, %s)\n", dcc->fd, res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = (res == -1) ? GG_ERROR_DCC7_NET : GG_ERROR_DCC7_EOF;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ // XXX zapisywać do skutku?
+
+ if ((wres = write(dcc->file_fd, buf, res)) < res) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (fd=%d, res=%d, %s)\n", dcc->file_fd, wres, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_FILE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->offset += res;
+
+ if (dcc->offset >= dcc->size) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
+ e->type = GG_EVENT_DCC7_DONE;
+ e->event.dcc7_done.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->state = GG_STATE_GETTING_FILE;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DCC7_TIMEOUT_GET;
+
+ return e;
+ }
+
+ case GG_STATE_RESOLVING_RELAY:
+ {
+ struct in_addr addr;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_RESOLVING_RELAY\n");
+
+ if (gg_sock_read(dcc->fd, &addr, sizeof(addr)) < sizeof(addr) || addr.s_addr == INADDR_NONE) {
+ int errno_save = errno;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() resolving failed\n");
+ gg_sock_close(dcc->fd);
+ dcc->fd = -1;
+ dcc->sess->resolver_cleanup(&dcc->resolver, 0);
+ errno = errno_save;
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() resolved, connecting to %s:%d\n", inet_ntoa(addr), GG_RELAY_PORT);
+
+ if ((dcc->fd = gg_connect(&addr, GG_RELAY_PORT, 1)) == -1) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (errno=%d, %s), critical\n", errno, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->state = GG_STATE_CONNECTING_RELAY;
+ dcc->check = GG_CHECK_WRITE;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+
+ return e;
+ }
+
+ case GG_STATE_CONNECTING_RELAY:
+ {
+ int res;
+ unsigned int res_size = sizeof(res);
+ struct gg_dcc7_relay_req pkt;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_CONNECTING_RELAY\n");
+
+ if (gg_getsockopt(dcc->fd, SOL_SOCKET, SO_ERROR, &res, &res_size) != 0 || res != 0) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (errno=%d, %s)\n", res, strerror(res));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ memset(&pkt, 0, sizeof(pkt));
+ pkt.magic = gg_fix32(GG_DCC7_RELAY_REQUEST);
+ pkt.len = gg_fix32(sizeof(pkt));
+ pkt.id = dcc->cid;
+ pkt.type = gg_fix16(GG_DCC7_RELAY_TYPE_SERVER);
+ pkt.dunno1 = gg_fix16(GG_DCC7_RELAY_DUNNO1);
+
+ gg_debug_dump_session((dcc) ? (dcc)->sess : NULL, &pkt, sizeof(pkt), "// gg_dcc7_watch_fd() send pkt(0x%.2x)\n", gg_fix32(pkt.magic));
+
+ if ((res = gg_sock_write(dcc->fd, &pkt, sizeof(pkt))) != sizeof(pkt)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() sending failed\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ dcc->state = GG_STATE_READING_RELAY;
+ dcc->check = GG_CHECK_READ;
+ dcc->timeout = GG_DEFAULT_TIMEOUT;
+
+ return e;
+ }
+
+ case GG_STATE_READING_RELAY:
+ {
+ char buf[256];
+ struct gg_dcc7_relay_reply *pkt;
+ struct gg_dcc7_relay_reply_server srv;
+ int res;
+ int i;
+
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_READING_RELAY\n");
+
+ if ((res = gg_sock_read(dcc->fd, buf, sizeof(buf))) < sizeof(*pkt)) {
+ if (res == 0)
+ errno = ECONNRESET;
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ pkt = (struct gg_dcc7_relay_reply*) buf;
+
+ if (gg_fix32(pkt->magic) != GG_DCC7_RELAY_REPLY || gg_fix32(pkt->rcount) < 1 || gg_fix32(pkt->rcount > 256) || gg_fix32(pkt->len) < sizeof(*pkt) + gg_fix32(pkt->rcount) * sizeof(srv)) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_wathc_fd() invalid reply\n");
+ errno = EINVAL;
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ gg_debug_dump_session((dcc) ? (dcc)->sess : NULL, buf, res, "// gg_dcc7_get_relay() read pkt(0x%.2x)\n", gg_fix32(pkt->magic));
+
+ free(dcc->relay_list);
+
+ dcc->relay_index = 0;
+ dcc->relay_count = gg_fix32(pkt->rcount);
+ dcc->relay_list = malloc(dcc->relay_count * sizeof(gg_dcc7_relay_t));
+
+ if (dcc->relay_list == NULL) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() not enough memory");
+ dcc->relay_count = 0;
+ free(e);
+ return NULL;
+ }
+
+ for (i = 0; i < dcc->relay_count; i++) {
+ struct in_addr addr;
+
+ memcpy(&srv, buf + sizeof(*pkt) + i * sizeof(srv), sizeof(srv));
+ dcc->relay_list[i].addr = srv.addr;
+ dcc->relay_list[i].port = gg_fix16(srv.port);
+ dcc->relay_list[i].family = srv.family;
+
+ addr.s_addr = srv.addr;
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// %s %d %d\n", inet_ntoa(addr), gg_fix16(srv.port), srv.family);
+ }
+
+ dcc->relay = 1;
+
+ for (; dcc->relay_index < dcc->relay_count; dcc->relay_index++) {
+ dcc->remote_addr = dcc->relay_list[dcc->relay_index].addr;
+ dcc->remote_port = dcc->relay_list[dcc->relay_index].port;
+
+ if (gg_dcc7_connect(dcc) == 0)
+ break;
+ }
+
+ if (dcc->relay_index >= dcc->relay_count) {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() no relay available");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_RELAY;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+ return e;
+ }
+
+ return e;
+ }
+
+ default:
+ {
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_???\n");
+ e->type = GG_EVENT_DCC7_ERROR;
+ e->event.dcc7_error = GG_ERROR_DCC7_HANDSHAKE;
+ e->event.dcc7_error_ex.dcc7 = dcc;
+
+ return e;
+ }
+ }
+
+ return e;
+}
+
+/**
+ * Zwalnia zasoby używane przez połączenie bezpośrednie.
+ *
+ * \param dcc Struktura połączenia
+ *
+ * \ingroup dcc7
+ */
+void gg_dcc7_free(struct gg_dcc7 *dcc)
+{
+ gg_debug_session((dcc) ? (dcc)->sess : NULL, GG_DEBUG_FUNCTION, "** gg_dcc7_free(%p)\n", dcc);
+
+ if (!dcc)
+ return;
+
+ if (dcc->fd != -1)
+ gg_sock_close(dcc->fd);
+
+ if (dcc->file_fd != -1)
+ close(dcc->file_fd);
+
+ if (dcc->sess)
+ gg_dcc7_session_remove(dcc->sess, dcc);
+
+ free(dcc->relay_list);
+
+ free(dcc);
+}
+
|