/**
* 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);
}
/**
* 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_dcc(dcc, 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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid parameters\n");
errno = EINVAL;
return NULL;
}
if (!(e = malloc(sizeof(struct gg_event)))) {
gg_debug_dcc(dcc, 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;
int fd, one = 1;
socklen_t sin_len = sizeof(sin);
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_LISTENING\n");
if ((fd = accept(dcc->fd, (struct sockaddr*) &sin, &sin_len)) == -1) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() accept() failed (%s)\n", strerror(errno));
return e;
}
gg_debug_dcc(dcc, 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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() can't set nonblocking (%s)\n", strerror(errno));
close(fd);
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_HANDSHAKE;
return e;
}
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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_CONNECTING\n");
dcc->soft_timeout = 0;
if (dcc->timeout == 0)
error = ETIMEDOUT;
if (error || (res = getsockopt(dcc->fd, SOL_SOCKET, SO_ERROR, &error, &error_size)) == -1 || error != 0) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() connection failed (%s)\n", (res == -1) ? strerror(errno) : strerror(error));
if (gg_dcc7_reverse_connect(dcc) != -1) {
e->type = GG_EVENT_DCC7_PENDING;
} else {
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_NET;
}
return e;
}
gg_debug_dcc(dcc, 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:
{
gg_dcc7_id_t id;
int res;
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_READING_ID\n");
if ((res = read(dcc->fd, &id, sizeof(id))) != sizeof(id)) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (%d, %s)\n", res, strerror(errno));
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_HANDSHAKE;
return e;
}
if (memcmp(&id, &dcc->cid, sizeof(id))) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() invalid id\n");
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_HANDSHAKE;
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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_SENDING_ID\n");
if ((res = write(dcc->fd, &dcc->cid, sizeof(dcc->cid))) != sizeof(dcc->cid)) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%d, %s)", res, strerror(errno));
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_HANDSHAKE;
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_dcc(dcc, 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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() offset >= size, finished\n");
e->type = GG_EVENT_DCC7_DONE;
return e;
}
if (dcc->seek && lseek(dcc->file_fd, dcc->offset, SEEK_SET) == (off_t) -1) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() lseek() failed (%s)\n", strerror(errno));
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_FILE;
return e;
}
if ((chunk = dcc->size - dcc->offset) > sizeof(buf))
chunk = sizeof(buf);
if ((res = read(dcc->file_fd, buf, chunk)) < 1) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() read() failed (res=%d, %s)\n", res, strerror(errno));
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = (res == -1) ? GG_ERROR_DCC7_FILE : GG_ERROR_DCC7_EOF;
return e;
}
if ((res = write(dcc->fd, buf, res)) == -1) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() write() failed (%s)\n", strerror(errno));
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_NET;
return e;
}
dcc->offset += res;
if (dcc->offset >= dcc->size) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
e->type = GG_EVENT_DCC7_DONE;
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_dcc(dcc, 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_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
e->type = GG_EVENT_DCC7_DONE;
return e;
}
if ((res = read(dcc->fd, buf, sizeof(buf))) < 1) {
gg_debug_dcc(dcc, 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.dcc_error = (res == -1) ? GG_ERROR_DCC7_NET : GG_ERROR_DCC7_EOF;
return e;
}
// XXX zapisywać do skutku?
if ((wres = write(dcc->file_fd, buf, res)) < res) {
gg_debug_dcc(dcc, 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.dcc_error = GG_ERROR_DCC7_FILE;
return e;
}
dcc->offset += res;
if (dcc->offset >= dcc->size) {
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() finished\n");
e->type = GG_EVENT_DCC7_DONE;
return e;
}
dcc->state = GG_STATE_GETTING_FILE;
dcc->check = GG_CHECK_READ;
dcc->timeout = GG_DCC7_TIMEOUT_GET;
return e;
}
default:
{
gg_debug_dcc(dcc, GG_DEBUG_MISC, "// gg_dcc7_watch_fd() GG_STATE_???\n");
e->type = GG_EVENT_DCC7_ERROR;
e->event.dcc_error = GG_ERROR_DCC7_HANDSHAKE;
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_dcc(dcc, GG_DEBUG_FUNCTION, "** gg_dcc7_free(%p)\n", dcc);
if (!dcc)
return;
if (dcc->fd != -1)
close(dcc->fd);
if (dcc->file_fd != -1)
close(dcc->file_fd);
if (dcc->sess)
gg_dcc7_session_remove(dcc->sess, dcc);
free(dcc);
}