[back to index]

#include <dkim.h>
DKIM_STAT dkim_set_signature_tagvalues(
	DKIM_LIB *libopendkim,
        void (*func)(void *user,
	             dkim_param_t pcode,
	             const unsigned char *param,
	             const unsigned char *value);
Defines a callback function to be used for providing signature tag/value pairs to the calling program for local processing.

From within dkim_eoh(), each discovered signature is assigned a DKIM_SIGINFO handle. Using a callback, the caller can arrange to allocate caller-side storage that might be desired by the caller for processing signatures; the return value from that callback is assumed to be a pointer to such storage. The callback defined here will be invoked once for each tag-value pair found in each signature, thus providing that data to the caller for any desirable local processing. The data thus provided are read-only.

Called When dkim_set_signature_tagvalues() must be called before dkim_eoh() has been called.
libopendkim Library-specific handle, returned by dkim_init().
func A pointer to a function which takes four parameters:
  • user is the caller-side handle pointer generated by the earlier callback; this will be the same pointer each time a tag-value pair is passed in for the same signature
  • pcode is an integer code indicating which parameter is being provided (useful for C "switch" statements)
  • param is a pointer to the name of the tag being provided
  • value is a pointer to the value of the tag being provided
If NULL, no callback will be used.
  • None.

Copyright (c) 2007 Sendmail, Inc. and its suppliers. All rights reserved.
Copyright (c) 2009, 2010, The Trusted Domain Project. All rights reserved.
By using this file, you agree to the terms and conditions set forth in the respective licenses.