src/smtp/smtp_reuse.c

7 /*	SMTP session cache glue
26 /*	the generic session cache infrastructure.
32 /*	smtp_save_session() stores the current session under the
37 /*	smtp_reuse_nexthop() looks up a cached session by its
39 /*	the session is still alive. The restored session information
43 /*	smtp_reuse_addr() looks up a cached session by its server
44 /*	address, and verifies that the session is still alive.
45 /*	The restored session information does not include the "best
51 /*	SMTP client state, including the current session, the original
111 /* smtp_save_session - save session under next-hop name and server address */
116     SMTP_SESSION *session = state->session;
144     fd = smtp_session_passivate(session, state->dest_prop, state->endp_prop);
145     state->session = 0;
148      * Save the session under the delivery request next-hop name, if
153      * bindings). The session should be idle for no more than 30 seconds or
162      * Save every good session under its physical endpoint address.
168 /* smtp_reuse_common - common session reuse code */
175     SMTP_SESSION *session;
185     session = smtp_session_activate(fd, state->iterator, state->dest_prop,
187     if (session == 0) {
188 	msg_warn("%s: bad cached session attribute for %s", myname, label);
192     state->session = session;
193     session->state = state;
196      * Send an RSET probe to verify that the session is still good.
199 	|| (session->features & SMTP_FEATURE_RSET_REJECTED) != 0) {
200 	smtp_session_free(session);
201 	return (state->session = 0);
207     vstream_tweak_sock(session->stream);
214     return (session);
217 /* smtp_reuse_nexthop - reuse session cached under nexthop name */
222     SMTP_SESSION *session;
226      * Look up the session by its logical name.
237      * Re-activate the SMTP_SESSION object, and verify that the session is
240     session = smtp_reuse_common(state, fd, STR(state->dest_label));
241     return (session);
244 /* smtp_reuse_addr - reuse session cached under numerical address */
249     SMTP_SESSION *session;
262      * Look up the session by its IP address. This means that we have no
276      * Re-activate the SMTP_SESSION object, and verify that the session is
279     session = smtp_reuse_common(state, fd, STR(state->endp_label));
281     return (session);