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/* Copyright (c) 2001, Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* @file pubsub_publish.c
* @brief Header for functions to publish using a pub_binding_t.
**/
#define PUBSUB_PRIVATE
#define DISPATCH_PRIVATE
#include "orconfig.h"
#include "lib/dispatch/dispatch.h"
#include "lib/dispatch/dispatch_st.h"
#include "lib/pubsub/pub_binding_st.h"
#include "lib/pubsub/pubsub_publish.h"
#include "lib/malloc/malloc.h"
#include "lib/log/util_bug.h"
#include <string.h>
/**
* Publish a message from the publication binding <b>pub</b> using the
* auxiliary data <b>auxdata</b>.
*
* Return 0 on success, -1 on failure.
**/
int
pubsub_pub_(const pub_binding_t *pub, msg_aux_data_t auxdata)
{
dispatch_t *d = pub->dispatch_ptr;
if (BUG(! d)) {
/* Tried to publish a message before the dispatcher was configured. */
/* (Without a dispatcher, we don't know how to free auxdata.) */
return -1;
}
if (BUG(pub->msg_template.type >= d->n_types)) {
/* The type associated with this message is not known to the dispatcher. */
/* (Without a correct type, we don't know how to free auxdata.) */
return -1;
}
if (BUG(pub->msg_template.msg >= d->n_msgs) ||
BUG(pub->msg_template.channel >= d->n_queues)) {
/* The message ID or channel ID was out of bounds. */
// LCOV_EXCL_START
d->typefns[pub->msg_template.type].free_fn(auxdata);
return -1;
// LCOV_EXCL_STOP
}
if (! d->table[pub->msg_template.msg]) {
/* Fast path: nobody wants this data. */
// XXXX Faster path: we could store this in the pub_binding_t.
d->typefns[pub->msg_template.type].free_fn(auxdata);
return 0;
}
/* Construct the message object */
msg_t *m = tor_malloc(sizeof(msg_t));
memcpy(m, &pub->msg_template, sizeof(msg_t));
m->aux_data__ = auxdata;
return dispatch_send_msg_unchecked(d, m);
}
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