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98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/* Copyright (c) 2015-2023, Michael Santos <michael.santos@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "xmppipe.h"
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int handle_sm_enabled(xmpp_conn_t *const conn, xmpp_stanza_t *const stanza,
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void *const userdata) {
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xmppipe_state_t *state = userdata;
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state->sm_enabled = 1;
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return 0;
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}
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int handle_sm_request(xmpp_conn_t *const conn, xmpp_stanza_t *const stanza,
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void *const userdata) {
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xmppipe_state_t *state = userdata;
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xmpp_stanza_t *a;
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char h[11] = {0};
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if (state->sm_request % state->sm_request_interval != 0)
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return 1;
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(void)snprintf(h, sizeof(h), "%u", state->sm_ack_recv);
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/* <a xmlns='urn:xmpp:sm:3' h='1'/> */
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a = xmppipe_stanza_new(state->ctx);
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xmppipe_stanza_set_name(a, "a");
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xmppipe_stanza_set_ns(a, "urn:xmpp:sm:3");
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xmppipe_stanza_set_attribute(a, "h", h);
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xmpp_send(state->conn, a);
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(void)xmpp_stanza_release(a);
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return 1;
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}
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int handle_sm_ack(xmpp_conn_t *const conn, xmpp_stanza_t *const stanza,
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void *const userdata) {
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xmppipe_state_t *state = userdata;
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const char *h;
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u_int32_t ack;
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const char *errstr = NULL;
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h = xmpp_stanza_get_attribute(stanza, "h");
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if (h == NULL)
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return 1;
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ack = (u_int32_t)strtonum(h, 0, UINT_MAX - 1, &errstr);
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if (errstr != NULL)
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goto XMPPIPE_STREAMERR;
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if (state->verbose)
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(void)fprintf(stderr, "SM: request=%u ack=%u last=%u\n", state->sm_request,
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ack, state->sm_ack_sent);
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state->sm_request_unack = 0;
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/* Number of stanzas received by server exceeds the number sent by
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* the client.
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*/
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if (ack > state->sm_request)
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goto XMPPIPE_STREAMERR;
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/* Server count not incremented since last request (stanzas may have
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* been dropped).
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*
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* Could resend dropped stanzas.
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*
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*/
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if (ack == state->sm_ack_sent)
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goto XMPPIPE_STREAMERR;
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state->sm_ack_sent = ack;
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return 1;
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XMPPIPE_STREAMERR:
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xmppipe_stream_close(state);
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errx(EXIT_FAILURE, "ack sequence mismatch: request=%u, ack=%u\n",
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state->sm_request, state->sm_ack_sent);
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}
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void xmppipe_stream_close(xmppipe_state_t *state) {
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if (state->sm_enabled)
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xmpp_send_raw_string(state->conn, "</stream:stream>");
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}
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