Pass an HTTP message type to all HTTP subdissectors.

This gets complicated, because those subdissectors might be called by
other dissectors as well.  We need a better way of passing that sort of
out-of-bound information.

Pull some routines used for processing Content-Type parameters into
common code; we can't guarantee that the media parameters passed in
would be writable (passing it as *the* data hid that; passing a
structure with that *and* the HTTP message type revealed it), so don't
convert it to lower-case in place.

Use that information, if available, to determine whether an IPP message
is a requet or a response.

Change-Id: I4bccc9f05cd0b14ad445be7ab37b3d884d841325
Reviewed-on: https://code.wireshark.org/review/17216
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 13 insertions, 0 deletions

diff --git a/epan/dissectors/packet-http.h b/epan/dissectors/packet-http.h
index 179ca200a0..2ff906ca57 100644
--- a/epan/dissectors/packet-http.h
+++ b/epan/dissectors/packet-http.h
@@ -85,4 +85,17 @@ typedef struct _http_conv_t {
 	http_req_res_t *req_res_tail;
 } http_conv_t;
 
+typedef enum _http_type {
+	HTTP_REQUEST,
+	HTTP_RESPONSE,
+	HTTP_NOTIFICATION,
+	HTTP_OTHERS
+} http_type_t;
+
+/** Passed to dissectors called by the HTTP dissector. */
+typedef struct _http_message_info_t {
+	http_type_t type;      /* Message type; may be HTTP_OTHERS if not called by HTTP */
+	const char *media_str; /* Content-Type parameters */
+} http_message_info_t;
+
 #endif /* __PACKET_HTTP_H__ */