static int
stream_send__drain (evcom_stream *stream)
{
if (stream->on_drain) {
stream->on_drain(stream);
}
if (!GOT_CLOSE(stream)) {
stream->send_action = stream_send__wait_for_buf;
return OKAY;
}
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
stream->send_action = stream_send__gnutls_bye;
return OKAY;
}
#endif
if (DUPLEX(stream)) {
stream->send_action = stream_send__shutdown;
return OKAY;
}
stream->send_action = stream_send__close_one;
return OKAY;
}
static ssize_t
pull (gnutls_transport_ptr_t data, void* buf, size_t len)
{
evcom_stream *stream = (evcom_stream*)data;
assert(SECURE(stream));
return read(stream->recvfd, buf, len);
}
static ssize_t
nosigpipe_push (gnutls_transport_ptr_t data, const void *buf, size_t len)
{
evcom_stream *stream = (evcom_stream*)data;
assert(SECURE(stream));
return nosigpipe_stream_send(stream, buf, len);
}
void closeInterface(Interface * interface) {
assert(interface->open);
interface->open = 0;
while(fclose(interface->fp) && errno==EINTR);
if(interface->commandList) freeList(interface->commandList);
if(interface->bufferList) freeList(interface->bufferList);
free(interface->outBuffer);
SECURE("interface %i: closed\n",interface->num);
}
void openAInterface(int fd, struct sockaddr * addr) {
int i;
for(i=0;i<interface_max_connections && interfaces[i].open;i++);
if(i==interface_max_connections) {
ERROR("Max Connections Reached!\n");
while(close(fd) && errno==EINTR);
}
else {
SECURE("interface %i: opened from ",i);
switch(addr->sa_family) {
case AF_INET:
{
char * host = inet_ntoa(
((struct sockaddr_in *)addr)->
sin_addr);
if(host) {
SECURE("%s\n",host);
}
else {
SECURE("error getting ipv4 address\n");
}
}
break;
#ifdef HAVE_IPV6
case AF_INET6:
{
char host[INET6_ADDRSTRLEN+1];
memset(host,0,INET6_ADDRSTRLEN+1);
if(inet_ntop(AF_INET6,(void *)
&(((struct sockaddr_in6 *)addr)->
sin6_addr),host,INET6_ADDRSTRLEN))
{
SECURE("%s\n",host);
}
else {
SECURE("error getting ipv6 address\n");
}
}
break;
#endif
case AF_UNIX:
SECURE("local connection\n");
break;
default:
SECURE("unknown\n");
}
openInterface(&(interfaces[i]),fd);
}
}
void
evcom_stream_assign_fds (evcom_stream *stream, int recvfd, int sendfd)
{
assert(recvfd >= 0);
assert(sendfd >= 0);
if (recvfd == sendfd) stream->flags |= EVCOM_DUPLEX;
if (set_nonblock(recvfd) != 0) {
evcom_perror("set_nonblock(recvfd)", errno);
}
if (set_nonblock(sendfd) != 0) {
evcom_perror("set_nonblock(sendfd)", errno);
}
#ifdef SO_NOSIGPIPE
if (DUPLEX(stream)) {
int flags = 1;
int r = setsockopt(sendfd, SOL_SOCKET, SO_NOSIGPIPE, &flags, sizeof(flags));
if (r < 0) {
evcom_perror("setsockopt(SO_NOSIGPIPE)", errno);
}
}
#endif
ev_io_set(&stream->read_watcher, recvfd, EV_READ);
ev_io_set(&stream->write_watcher, sendfd, EV_WRITE);
stream->recvfd = recvfd;
stream->sendfd = sendfd;
stream->send_action = stream__connection_established;
stream->recv_action = stream__connection_established;
stream->flags |= EVCOM_READABLE;
stream->flags |= EVCOM_WRITABLE;
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
gnutls_transport_set_lowat(stream->session, 0);
gnutls_transport_set_push_function(stream->session, nosigpipe_push);
gnutls_transport_set_pull_function(stream->session, pull);
gnutls_transport_set_ptr2(stream->session, stream, stream);
}
#endif
}
static int
stream__handshake (evcom_stream *stream)
{
assert(SECURE(stream));
int r = gnutls_handshake(stream->session);
if (gnutls_error_is_fatal(r)) {
stream->gnutls_errorno = r;
stream->send_action = stream_send__close;
stream->recv_action = stream_recv__close;
return OKAY;
}
ev_timer_again(D_LOOP_(stream) &stream->timeout_watcher);
if (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN) {
if (0 == gnutls_record_get_direction((stream)->session)) {
ev_io_start(D_LOOP_(stream) &(stream)->read_watcher);
ev_io_stop(D_LOOP_(stream) &(stream)->write_watcher);
} else {
ev_io_stop(D_LOOP_(stream) &(stream)->read_watcher);
ev_io_start(D_LOOP_(stream) &(stream)->write_watcher);
}
assert(stream->recv_action == stream__handshake);
assert(stream->send_action == stream__handshake);
return AGAIN;
}
assert(!CONNECTED(stream));
stream->flags |= EVCOM_CONNECTED;
if (stream->on_connect) stream->on_connect(stream);
/* evcom_stream_force_close might have been called. */
if (stream->recvfd >= 0 && stream->sendfd >= 0) {
ev_io_start(D_LOOP_(stream) &stream->read_watcher);
ev_io_start(D_LOOP_(stream) &stream->write_watcher);
stream->send_action = stream_send__data;
stream->recv_action = stream_recv__data;
}
return OKAY;
}
static int
stream__connection_established (evcom_stream *stream)
{
assert(!CONNECTED(stream));
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
stream->send_action = stream__handshake;
stream->recv_action = stream__handshake;
} else
#endif
{
stream->flags |= EVCOM_CONNECTED;
if (stream->on_connect) stream->on_connect(stream);
stream->send_action = stream_send__data;
stream->recv_action = stream_recv__data;
}
ev_io_start(D_LOOP_(stream) &stream->write_watcher);
ev_io_start(D_LOOP_(stream) &stream->read_watcher);
return OKAY;
}
static int
stream_send__gnutls_bye (evcom_stream *stream)
{
assert(SECURE(stream));
int r = gnutls_bye(stream->session, GNUTLS_SHUT_WR);
if (r == GNUTLS_E_INTERRUPTED || r == GNUTLS_E_AGAIN) {
assert(1 == gnutls_record_get_direction((stream)->session));
assert(stream->send_action == stream_send__gnutls_bye);
return AGAIN;
}
if (gnutls_error_is_fatal(r)) {
stream->gnutls_errorno = r;
stream->send_action = stream_send__close;
return OKAY;
}
stream->flags &= ~EVCOM_WRITABLE;
stream->send_action = stream_send__wait_for_eof;
return OKAY;
}
static int
stream_send__data (evcom_stream *stream)
{
ssize_t sent;
while (!evcom_queue_empty(&stream->out)) {
assert(WRITABLE(stream));
evcom_queue *q = evcom_queue_last(&stream->out);
evcom_buf *buf = evcom_queue_data(q, evcom_buf, queue);
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
sent = gnutls_record_send(stream->session,
buf->base + buf->written,
buf->len - buf->written);
if (sent == GNUTLS_E_INTERRUPTED || sent == GNUTLS_E_AGAIN) {
if (0 == gnutls_record_get_direction((stream)->session)) {
fprintf(stderr, "(evcom) gnutls send: unexpected switch direction!\n");
ev_io_start(D_LOOP_(stream) &(stream)->read_watcher);
ev_io_stop(D_LOOP_(stream) &(stream)->write_watcher);
}
return AGAIN;
}
if (gnutls_error_is_fatal(sent)) {
stream->gnutls_errorno = sent;
stream->send_action = stream_send__close;
return OKAY;
}
} else
#endif // EVCOM_HAVE_GNUTLS
{
/* TODO use writev() here? */
sent = nosigpipe_stream_send(stream,
buf->base + buf->written,
buf->len - buf->written);
}
if (sent <= 0) {
switch (errno) {
case EAGAIN:
case EINTR:
assert(stream->send_action == stream_send__data);
return AGAIN;
default:
stream->errorno = errno;
evcom_perror("send()", errno);
/* pass through */
case EPIPE:
stream->send_action = stream_send__close;
return OKAY;
}
}
ev_timer_again(D_LOOP_(stream) &stream->timeout_watcher);
assert(sent >= 0);
buf->written += sent;
if (buf->written == buf->len) {
evcom_queue_remove(q);
if (buf->release) buf->release(buf);
}
}
assert(evcom_queue_empty(&stream->out));
stream->send_action = stream_send__drain;
return OKAY;
}
static int
stream_recv__data (evcom_stream *stream)
{
char buf[EVCOM_CHUNKSIZE];
size_t buf_size = EVCOM_CHUNKSIZE;
ssize_t recved;
while (READABLE(stream)) {
assert(CONNECTED(stream));
if (PAUSED(stream)) {
stream->recv_action = stream_recv__wait_for_resume;
return OKAY;
}
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
recved = gnutls_record_recv(stream->session, buf, buf_size);
if (gnutls_error_is_fatal(recved)) {
stream->gnutls_errorno = recved;
stream->recv_action = stream_recv__close;
return OKAY;
}
if (recved == GNUTLS_E_INTERRUPTED || recved == GNUTLS_E_AGAIN) {
if (1 == gnutls_record_get_direction((stream)->session)) {
fprintf(stderr, "(evcom) gnutls recv: unexpected switch direction!\n");
ev_io_stop(D_LOOP_(stream) &(stream)->read_watcher);
ev_io_start(D_LOOP_(stream) &(stream)->write_watcher);
}
return AGAIN;
}
/* A server may also receive GNUTLS_E_REHANDSHAKE when a client has
* initiated a andshake. In that case the server can only initiate a
* handshake or terminate the connection. */
if (recved == GNUTLS_E_REHANDSHAKE) {
assert(WRITABLE(stream));
stream->recv_action = stream__handshake;
stream->send_action = stream__handshake;
return OKAY;
}
} else
#endif /* EVCOM_HAVE_GNUTLS */
{
recved = read(stream->recvfd, buf, buf_size);
}
if (recved < 0) {
if (errno == EAGAIN || errno == EINTR) {
assert(stream->recv_action == stream_recv__data);
return AGAIN;
}
if (errno != ECONNRESET) {
evcom_perror("recv()", stream->errorno);
}
stream->errorno = errno;
stream->recv_action = stream_recv__close;
return OKAY;
}
ev_timer_again(D_LOOP_(stream) &stream->timeout_watcher);
assert(recved >= 0);
if (recved == 0) {
stream->flags &= ~EVCOM_READABLE;
ev_io_stop(D_LOOP_(stream) &stream->read_watcher);
stream->recv_action = stream_recv__wait_for_close;
}
/* NOTE: EOF is signaled with recved == 0 on callback */
if (stream->on_read) stream->on_read(stream, buf, recved);
if (recved == 0) {
return OKAY;
}
}
return AGAIN;
}
/* Returns the number of bytes flushed to the buffer */
ssize_t
evcom_stream_write (evcom_stream *stream, const char *str, size_t len)
{
if (!WRITABLE(stream) || GOT_CLOSE(stream)) {
assert(0 && "Do not write to a closed stream");
return -1;
}
ssize_t sent = 0;
if ( stream->send_action == stream_send__wait_for_buf
&& evcom_queue_empty(&stream->out)
)
{
assert(CONNECTED(stream));
#if EVCOM_HAVE_GNUTLS
if (SECURE(stream)) {
sent = gnutls_record_send(stream->session, str, len);
if (gnutls_error_is_fatal(sent)) {
stream->gnutls_errorno = sent;
goto close;
}
} else
#endif // EVCOM_HAVE_GNUTLS
{
/* TODO use writev() here? */
sent = nosigpipe_stream_send(stream, str, len);
}
if (sent < 0) {
switch (errno) {
case EPIPE:
goto close;
case EINTR:
case EAGAIN:
sent = 0;
break;
default:
stream->errorno = errno;
evcom_perror("send()", stream->errorno);
goto close;
}
}
} /* TODO else { memcpy to last buffer on head } */
assert(sent >= 0);
if ((size_t)sent == len) return sent; /* sent the whole buffer */
len -= sent;
str += sent;
evcom_buf *b = evcom_buf_new(str, len);
evcom_queue_insert_head(&stream->out, &b->queue);
b->written = 0;
assert(stream->sendfd >= 0);
if (ATTACHED(stream)) {
ev_io_start(D_LOOP_(stream) &stream->write_watcher);
}
return sent;
close:
stream->send_action = stream_send__close;
stream->recv_action = stream_recv__close;
if (ATTACHED(stream)) {
ev_io_start(D_LOOP_(stream) &stream->write_watcher);
}
return -1;
}
