71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* tlsComm.h - interface for the thin layer that looks
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sort of like fgets and fprintf, but might read or write
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to a socket or a TLS association
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Neil Spring (nspring@cs.washington.edu)
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Comments in @'s are for lclint's benefit:
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http://lclint.cs.virginia.edu/
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*/
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/* used to drill through per-mailbox debug keys */
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#include <stdint.h>
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#include "Client.h"
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/* opaque reference to the state associated with a
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connection: may be just a file handle, or may include
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encryption state */
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struct connection_state;
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/* take a socket descriptor and negotiate a TLS connection
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over it */
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/*@only@*/
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struct connection_state *initialize_gnutls(intptr_t sd,
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/* @only@ */ char *name,
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Pop3 *pc,
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const char *hostname);
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/* take a socket descriptor and bundle it into a connection
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state structure for later communication */
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/*@only@*/
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struct connection_state *initialize_unencrypted(int sd, /*@only@ */
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char *name, Pop3 * pc);
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/* store a binding when connect() times out. these should be
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skipped when trying to check mail so that other mailboxes
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are checked responsively. I believe linux defaults to
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around 90 seconds for a failed connect() attempt */
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/* TODO: engineer an eventual retry scheme */
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/*@only@*/
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struct connection_state *initialize_blacklist( /*@only@ */ char *name);
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int tlscomm_is_blacklisted(const struct connection_state *scs);
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/* just like fprintf, only takes a connection state structure */
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void tlscomm_printf(struct connection_state *scs, const char *format, ...);
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/* modeled after fgets; may not work exactly the same */
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int tlscomm_gets( /*@out@ */ char *buf,
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int buflen, struct connection_state *scs);
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/* gobbles lines until it finds one starting with {prefix},
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which is returned in buf */
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int tlscomm_expect(struct connection_state *scs, const char *prefix,
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/*@out@ */ char *buf,
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int buflen);
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/* terminates the TLS association or just closes the socket,
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and frees the connection state */
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void tlscomm_close( /*@only@ */ struct connection_state *scs);
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/* internal function exported for testing */
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int getline_from_buffer(char *readbuffer, char *linebuffer,
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int linebuflen);
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#ifndef UNUSED
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#ifdef HAVE___ATTRIBUTE__
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#define UNUSED(x) /*@unused@*/ x __attribute__((unused))
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#else
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#define UNUSED(x) x
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#endif
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#endif
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