void send_datagram (struct NLS_HandleTypedef* hNLS , uint8_t* packet , int length , datagram_address_t dest_address , datagram_qos_t qos , uint8_t retry)
{
if(retry != 0)
{
downStreamTablePenaliziesBestPath(hNLS->dTable , dest_address);
}
//lookup downstream table
datagram_if_id_t dspath[MAX_HOP_COUNT];
uint8_t ds_path_len;
if(downstreamTableGetBestPath(hNLS->dTable , dest_address ,dspath , &ds_path_len )==1){
printf("IMPOSSIBILE INVIARE _ NO BEST PATH PER %x \n\r",dest_address);
return;
}
//printf(" dspath[0] : %d , dspath[1] : %d \n\r" , dspath[0] , dspath[1]);
//costruisci un pacchetto downstream
dsData_typedef data;
data.address = dest_address;
data.qos = qos;
data.ds_path = dspath;
data.ds_path_length = ds_path_len;
data.payload_length = length;
data.payload = packet;
data.trailer = trailer_gen(packet , length);
int datagram_len;
uint8_t* to_send = build_dsData(data , &datagram_len);
// printf("PACCHETTO DOWNSTREAM \n\r");
//
// print_dsData(to_send);
//costruisci struttura datagram info
datagram_info* d_info = init_datagram_info(to_send , NO_SRC_IF , datagram_len, 0);
//invia
send_downstream(hNLS , d_info);
}
/**
* Funzione eseguita ciclicamente. Disaccoda un pacchetto, ne verifica il tipo
* ed chiama la primitiva di invio appropriata.
*/
void dispatch (struct NLS_HandleTypedef* hNLS) //XXX PER PAOLO: MODIFICA FATTA!!
{
//scoda la prep queue se vuota
if (!simpleQueueEmpty(hNLS->PREP_queue))
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "scoda la coda PREP", "OK",
// LOG_END);
on_PREP(hNLS , simpleQueueDequeue(hNLS->PREP_queue));
}
//scoda la coda di ingresso
datagram_info* d_info = (datagram_info*)priorityQueueDequeue(hNLS->routing_queue);
if (d_info == NULL)
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "scoda la coda d'ingresso", "OK",
// LOG_STRING, "coda d'ingresso", "nessun datagram",
// LOG_END);
return;
}
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "scoda la coda d'ingresso", "OK",
// LOG_STRING, "coda d'ingresso", "datagram scodato",
// LOG_INT, "if source", d_info->source_if,
// LOG_INT, "datagram type", d_info->type,
// LOG_INT, "packet length", d_info->packet_length,
// LOG_INT, "address", d_info->address,
// LOG_END);
//i messaggi di upstream e downstream diretti al root vanno direttamente al livello superiore
#ifdef ROOT
if (d_info->type == DATA_UP) //XXX CONTROLLARE DATA_DOWN
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "nodo ROOT: datagram type", "DATA UP",
// LOG_STRING, "nodo ROOT: trasferisci al livello superiore", "OK",
// LOG_END);
on_datagram_received(d_info);
return;
}
#else
if ((get_datagram_address(d_info->packet) == MY_ADDRESS) && (d_info->type == DATA_DOWN))
{
//è un datagramma dati, manda ai livelli superiori
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram dati", "trasferisci aL livellO superiorE",
// LOG_END);
on_datagram_received(d_info);
//BSP_LED_On(LED5);
return;
}
//se non ho un path
if(UTGetSize(hNLS->uTable) == 0)
{
//se non ho un path ma ho pacchetti da inviare
if(d_info != NULL)
{
//fai path discovery
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch",
// LOG_STRING, "nessun path e datagram da inviare", "esegui path discovery",
// LOG_END);
on_path_discovery(hNLS , d_info);
}
}
#endif
//qui sono associato
switch(d_info->type)
{
case DATA_UP:
{
#ifndef ROOT //XXX PER PAOLO: Attenzione a questo #ifndef; potrebbe anche non essere necessario
if(d_info->source_if == UTGetMainLink(hNLS->uTable))
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram type", "DATA UP",
// LOG_STRING, "swap main link in Upstream Table", "OK",
// LOG_END);
UTSwapMainLink(hNLS->uTable);
}
send_upstream(hNLS , d_info);
#endif
break;
}
case DATA_DOWN:
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram type", "DATA DOWN",
// LOG_STRING, "trasmissione DOWNSTREAM", "OK",
// LOG_END);
send_downstream(hNLS , d_info);
break;
}
case BSRP_PREQ:
{
#ifndef ROOT
if(hNLS->enabled_ifs_num!=1) //XXX ZUPPA PAOLO: TENTATIVO DI AGGIUSTARE IL PROTOCOLLO
#endif
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram type", "PREQ",
// LOG_STRING, "on PREQ", "OK",
// LOG_END);
on_PREQ(hNLS , d_info);
break;
}
case BSRP_PFWD:
{
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram type", "PFWD",
// LOG_STRING, "on PFWD", "OK",
// LOG_END);
on_PFWD(hNLS , d_info);
break;
}
case BSRP_PREP:
{
#ifndef ROOT
//TODO Log
//EventLogger_LogEvent(&LOG_HANDLE, NETWORK, NOTICE, MY_ADDRESS, "dispatch()",
// LOG_STRING, "datagram type", "PREP",
// LOG_STRING, "trasmissione DOWNSTREAM", "OK",
// LOG_END);
send_downstream(hNLS , d_info);
#endif
break;
}
case BSRP_PACK:
{
break;
}
}
}
/* xlate_out_filter() handles (almost) arbitrary conversions from one charset
* to another...
* translation is determined in the fixup hook (find_code_page), which is
* where the filter's context data is set up... the context data gives us
* the translation handle
*/
static apr_status_t xlate_out_filter(ap_filter_t *f, apr_bucket_brigade *bb)
{
charset_req_t *reqinfo = ap_get_module_config(f->r->request_config,
&charset_lite_module);
charset_dir_t *dc = ap_get_module_config(f->r->per_dir_config,
&charset_lite_module);
charset_filter_ctx_t *ctx = f->ctx;
apr_bucket *dptr, *consumed_bucket;
const char *cur_str;
apr_size_t cur_len, cur_avail;
char tmp[OUTPUT_XLATE_BUF_SIZE];
apr_size_t space_avail;
int done;
apr_status_t rv = APR_SUCCESS;
if (!ctx) {
/* this is SetOutputFilter path; grab the preallocated context,
* if any; note that if we decided not to do anything in an earlier
* handler, we won't even have a reqinfo
*/
if (reqinfo) {
ctx = f->ctx = reqinfo->output_ctx;
reqinfo->output_ctx = NULL; /* prevent SNAFU if user coded us twice
* in the filter chain; we can't have two
* instances using the same context
*/
}
if (!ctx) { /* no idea how to translate; don't do anything */
ctx = f->ctx = apr_pcalloc(f->r->pool, sizeof(charset_filter_ctx_t));
ctx->dc = dc;
ctx->noop = 1;
}
}
/* Check the mime type to see if translation should be performed.
*/
if (!ctx->noop && ctx->xlate == NULL) {
const char *mime_type = f->r->content_type;
if (mime_type && (strncasecmp(mime_type, "text/", 5) == 0 ||
#if APR_CHARSET_EBCDIC
/* On an EBCDIC machine, be willing to translate mod_autoindex-
* generated output. Otherwise, it doesn't look too cool.
*
* XXX This isn't a perfect fix because this doesn't trigger us
* to convert from the charset of the source code to ASCII. The
* general solution seems to be to allow a generator to set an
* indicator in the r specifying that the body is coded in the
* implementation character set (i.e., the charset of the source
* code). This would get several different types of documents
* translated properly: mod_autoindex output, mod_status output,
* mod_info output, hard-coded error documents, etc.
*/
strcmp(mime_type, DIR_MAGIC_TYPE) == 0 ||
#endif
strncasecmp(mime_type, "message/", 8) == 0 ||
dc->force_xlate == FX_FORCE)) {
rv = apr_xlate_open(&ctx->xlate,
dc->charset_default, dc->charset_source, f->r->pool);
if (rv != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, f->r, APLOGNO(01453)
"can't open translation %s->%s",
dc->charset_source, dc->charset_default);
ctx->noop = 1;
}
else {
if (apr_xlate_sb_get(ctx->xlate, &ctx->is_sb) != APR_SUCCESS) {
ctx->is_sb = 0;
}
}
}
else {
ctx->noop = 1;
if (mime_type) {
ap_log_rerror(APLOG_MARK, APLOG_TRACE6, 0, f->r,
"mime type is %s; no translation selected",
mime_type);
}
}
}
ap_log_rerror(APLOG_MARK, APLOG_TRACE6, 0, f->r,
"xlate_out_filter() - "
"charset_source: %s charset_default: %s",
dc && dc->charset_source ? dc->charset_source : "(none)",
dc && dc->charset_default ? dc->charset_default : "(none)");
if (!ctx->ran) { /* filter never ran before */
chk_filter_chain(f);
ctx->ran = 1;
if (!ctx->noop && !ctx->is_sb) {
/* We're not converting between two single-byte charsets, so unset
* Content-Length since it is unlikely to remain the same.
*/
apr_table_unset(f->r->headers_out, "Content-Length");
}
}
if (ctx->noop) {
return ap_pass_brigade(f->next, bb);
}
dptr = APR_BRIGADE_FIRST(bb);
done = 0;
cur_len = 0;
space_avail = sizeof(tmp);
consumed_bucket = NULL;
while (!done) {
if (!cur_len) { /* no bytes left to process in the current bucket... */
if (consumed_bucket) {
apr_bucket_delete(consumed_bucket);
consumed_bucket = NULL;
}
if (dptr == APR_BRIGADE_SENTINEL(bb)) {
break;
}
if (APR_BUCKET_IS_EOS(dptr)) {
cur_len = -1; /* XXX yuck, but that tells us to send
* eos down; when we minimize our bb construction
* we'll fix this crap */
if (ctx->saved) {
/* Oops... we have a partial char from the previous bucket
* that won't be completed because there's no more data.
*/
rv = APR_INCOMPLETE;
ctx->ees = EES_INCOMPLETE_CHAR;
}
break;
}
if (APR_BUCKET_IS_METADATA(dptr)) {
apr_bucket *metadata_bucket;
metadata_bucket = dptr;
dptr = APR_BUCKET_NEXT(dptr);
APR_BUCKET_REMOVE(metadata_bucket);
rv = send_bucket_downstream(f, metadata_bucket);
if (rv != APR_SUCCESS) {
done = 1;
}
continue;
}
rv = apr_bucket_read(dptr, &cur_str, &cur_len, APR_BLOCK_READ);
if (rv != APR_SUCCESS) {
ctx->ees = EES_BUCKET_READ;
break;
}
consumed_bucket = dptr; /* for axing when we're done reading it */
dptr = APR_BUCKET_NEXT(dptr); /* get ready for when we access the
* next bucket */
}
/* Try to fill up our tmp buffer with translated data. */
cur_avail = cur_len;
if (cur_len) { /* maybe we just hit the end of a pipe (len = 0) ? */
if (ctx->saved) {
/* Rats... we need to finish a partial character from the previous
* bucket.
*/
char *tmp_tmp;
tmp_tmp = tmp + sizeof(tmp) - space_avail;
rv = finish_partial_char(ctx,
&cur_str, &cur_len,
&tmp_tmp, &space_avail);
}
else {
rv = apr_xlate_conv_buffer(ctx->xlate,
cur_str, &cur_avail,
tmp + sizeof(tmp) - space_avail, &space_avail);
/* Update input ptr and len after consuming some bytes */
cur_str += cur_len - cur_avail;
cur_len = cur_avail;
if (rv == APR_INCOMPLETE) { /* partial character at end of input */
/* We need to save the final byte(s) for next time; we can't
* convert it until we look at the next bucket.
*/
rv = set_aside_partial_char(ctx, cur_str, cur_len);
cur_len = 0;
}
}
}
if (rv != APR_SUCCESS) {
/* bad input byte or partial char too big to store */
done = 1;
}
if (space_avail < XLATE_MIN_BUFF_LEFT) {
/* It is time to flush, as there is not enough space left in the
* current output buffer to bother with converting more data.
*/
rv = send_downstream(f, tmp, sizeof(tmp) - space_avail);
if (rv != APR_SUCCESS) {
done = 1;
}
/* tmp is now empty */
space_avail = sizeof(tmp);
}
}
if (rv == APR_SUCCESS) {
if (space_avail < sizeof(tmp)) { /* gotta write out what we converted */
rv = send_downstream(f, tmp, sizeof(tmp) - space_avail);
}
}
if (rv == APR_SUCCESS) {
if (cur_len == -1) {
rv = send_eos(f);
}
}
else {
log_xlate_error(f, rv);
}
return rv;
}
