#include <string.h>
#include "coverage.h"
#include "dynamic-string.h"
+#include "fatal-signal.h"
#include "flow.h"
#include "ofp-print.h"
#include "ofpbuf.h"
#include "poll-loop.h"
#include "random.h"
#include "util.h"
-
-#define THIS_MODULE VLM_stream
#include "vlog.h"
+VLOG_DEFINE_THIS_MODULE(stream)
+
/* State of an active stream.*/
enum stream_state {
SCS_CONNECTING, /* Underlying stream is not connected. */
{
struct stream *stream = *streamp;
- while (error == EAGAIN) {
- stream_run(stream);
- stream_run_wait(stream);
- stream_connect_wait(stream);
- poll_block();
- error = stream_connect(stream);
+ fatal_signal_run();
+
+ if (!error) {
+ while ((error = stream_connect(stream)) == EAGAIN) {
+ stream_run(stream);
+ stream_run_wait(stream);
+ stream_connect_wait(stream);
+ poll_block();
+ }
assert(error != EINPROGRESS);
}
+
if (error) {
stream_close(stream);
*streamp = NULL;
}
}
-/* Tries to complete the connection on 'stream', which must be an active
- * stream. If 'stream''s connection is complete, returns 0 if the connection
- * was successful or a positive errno value if it failed. If the
- * connection is still in progress, returns EAGAIN. */
+/* Tries to complete the connection on 'stream'. If 'stream''s connection is
+ * complete, returns 0 if the connection was successful or a positive errno
+ * value if it failed. If the connection is still in progress, returns
+ * EAGAIN. */
int
stream_connect(struct stream *stream)
{
{
int error;
+ fatal_signal_run();
while ((error = pstream_accept(pstream, new_stream)) == EAGAIN) {
pstream_wait(pstream);
poll_block();
pstream->class = class;
pstream->name = xstrdup(name);
}
+\f
+static int
+count_fields(const char *s_)
+{
+ char *s, *field, *save_ptr;
+ int n = 0;
+
+ save_ptr = NULL;
+ s = xstrdup(s_);
+ for (field = strtok_r(s, ":", &save_ptr); field != NULL;
+ field = strtok_r(NULL, ":", &save_ptr)) {
+ n++;
+ }
+ free(s);
+
+ return n;
+}
+
+/* Like stream_open(), but for tcp streams the port defaults to
+ * 'default_tcp_port' if no port number is given and for SSL streams the port
+ * defaults to 'default_ssl_port' if no port number is given. */
+int
+stream_open_with_default_ports(const char *name_,
+ uint16_t default_tcp_port,
+ uint16_t default_ssl_port,
+ struct stream **streamp)
+{
+ char *name;
+ int error;
+
+ if (!strncmp(name_, "tcp:", 4) && count_fields(name_) < 3) {
+ name = xasprintf("%s:%d", name_, default_tcp_port);
+ } else if (!strncmp(name_, "ssl:", 4) && count_fields(name_) < 3) {
+ name = xasprintf("%s:%d", name_, default_ssl_port);
+ } else {
+ name = xstrdup(name_);
+ }
+ error = stream_open(name, streamp);
+ free(name);
+
+ return error;
+}
+
+/* Like pstream_open(), but for ptcp streams the port defaults to
+ * 'default_ptcp_port' if no port number is given and for passive SSL streams
+ * the port defaults to 'default_pssl_port' if no port number is given. */
+int
+pstream_open_with_default_ports(const char *name_,
+ uint16_t default_ptcp_port,
+ uint16_t default_pssl_port,
+ struct pstream **pstreamp)
+{
+ char *name;
+ int error;
+
+ if (!strncmp(name_, "ptcp:", 5) && count_fields(name_) < 2) {
+ name = xasprintf("%s%d", name_, default_ptcp_port);
+ } else if (!strncmp(name_, "pssl:", 5) && count_fields(name_) < 2) {
+ name = xasprintf("%s%d", name_, default_pssl_port);
+ } else {
+ name = xstrdup(name_);
+ }
+ error = pstream_open(name, pstreamp);
+ free(name);
+
+ return error;
+}
+\f
+/* Attempts to guess the content type of a stream whose first few bytes were
+ * the 'size' bytes of 'data'. */
+static enum stream_content_type
+stream_guess_content(const uint8_t *data, size_t size)
+{
+ if (size >= 2) {
+#define PAIR(A, B) (((A) << 8) | (B))
+ switch (PAIR(data[0], data[1])) {
+ case PAIR(0x16, 0x03): /* Handshake, version 3. */
+ return STREAM_SSL;
+ case PAIR('{', '"'):
+ return STREAM_JSONRPC;
+ case PAIR(OFP_VERSION, OFPT_HELLO):
+ return STREAM_OPENFLOW;
+ }
+ }
+
+ return STREAM_UNKNOWN;
+}
+
+/* Returns a string represenation of 'type'. */
+static const char *
+stream_content_type_to_string(enum stream_content_type type)
+{
+ switch (type) {
+ case STREAM_UNKNOWN:
+ default:
+ return "unknown";
+
+ case STREAM_JSONRPC:
+ return "JSON-RPC";
+
+ case STREAM_OPENFLOW:
+ return "OpenFlow";
+
+ case STREAM_SSL:
+ return "SSL";
+ }
+}
+
+/* Attempts to guess the content type of a stream whose first few bytes were
+ * the 'size' bytes of 'data'. If this is done successfully, and the guessed
+ * content type is other than 'expected_type', then log a message in vlog
+ * module 'module', naming 'stream_name' as the source, explaining what
+ * content was expected and what was actually received. */
+void
+stream_report_content(const void *data, size_t size,
+ enum stream_content_type expected_type,
+ struct vlog_module *module, const char *stream_name)
+{
+ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
+ enum stream_content_type actual_type;
+
+ actual_type = stream_guess_content(data, size);
+ if (actual_type != expected_type && actual_type != STREAM_UNKNOWN) {
+ vlog_rate_limit(module, VLL_WARN, &rl,
+ "%s: received %s data on %s channel",
+ stream_name,
+ stream_content_type_to_string(expected_type),
+ stream_content_type_to_string(actual_type));
+ }
+}