struct ccnl_interest_s* ccnl_nfn_RX_request(struct ccnl_relay_s *ccnl, struct ccnl_face_s *from, struct ccnl_pkt_s **pkt) { struct ccnl_interest_s *i; if (!ccnl_nfnprefix_isNFN((*pkt)->pfx) || ccnl->km->numOfRunningComputations >= NFN_MAX_RUNNING_COMPUTATIONS) return NULL; i = ccnl_interest_new(ccnl, from, pkt); if (!i) return NULL; i->flags &= ~CCNL_PIT_COREPROPAGATES; // do not forward interests for running computations ccnl_interest_append_pending(i, from); // if (!(i->flags & CCNL_PIT_COREPROPAGATES)) ccnl_nfn(ccnl, ccnl_prefix_dup(i->pkt->pfx), from, NULL, i, i->pkt->suite, 0); TRACEOUT(); return i; }
struct ccnl_interest_s* ccnl_nfn_RX_request(struct ccnl_relay_s *ccnl, struct ccnl_face_s *from, int suite, struct ccnl_buf_s **buf, struct ccnl_prefix_s **p, int minsfx, int maxsfx) { struct ccnl_interest_s *i; struct ccnl_prefix_s *p2; if (ccnl->km->numOfRunningComputations >= NFN_MAX_RUNNING_COMPUTATIONS) return 0; p2 = ccnl_prefix_dup(*p); i = ccnl_interest_new(ccnl, from, (*p)->suite, buf, p, minsfx, maxsfx); i->flags &= ~CCNL_PIT_COREPROPAGATES; // do not forward interests for running computations ccnl_interest_append_pending(i, from); if (!(i->flags & CCNL_PIT_COREPROPAGATES)) ccnl_nfn(ccnl, p2, from, NULL, i, suite, 0); else { free_prefix(p2); } return i; }
int ccnl_ccnb_forwarder(struct ccnl_relay_s *relay, struct ccnl_face_s *from, unsigned char **data, int *datalen) { int rc= -1, scope=3, aok=3, minsfx=0, maxsfx=CCNL_MAX_NAME_COMP, contlen; struct ccnl_buf_s *buf = 0, *nonce=0, *ppkd=0; struct ccnl_interest_s *i = 0; struct ccnl_content_s *c = 0; struct ccnl_prefix_s *p = 0; unsigned char *content = 0; DEBUGMSG(99, "ccnl/ccnb forwarder (%d bytes left)\n", *datalen); buf = ccnl_ccnb_extract(data, datalen, &scope, &aok, &minsfx, &maxsfx, &p, &nonce, &ppkd, &content, &contlen); if (!buf) { DEBUGMSG(6, " parsing error or no prefix\n"); goto Done; } if (nonce && ccnl_nonce_find_or_append(relay, nonce)) { DEBUGMSG(6, " dropped because of duplicate nonce\n"); goto Skip; } if (buf->data[0] == 0x01 && buf->data[1] == 0xd2) { // interest DEBUGMSG(6, " interest=<%s>\n", ccnl_prefix_to_path(p)); ccnl_print_stats(relay, STAT_RCV_I); //log count recv_interest if (p->compcnt > 0 && p->comp[0][0] == (unsigned char) 0xc1) goto Skip; if (p->compcnt == 4 && !memcmp(p->comp[0], "ccnx", 4)) { rc = ccnl_mgmt(relay, buf, p, from); goto Done; } // CONFORM: Step 1: if ( aok & 0x01 ) { // honor "answer-from-existing-content-store" flag for (c = relay->contents; c; c = c->next) { if (c->suite != CCNL_SUITE_CCNB) continue; if (!ccnl_i_prefixof_c(p, minsfx, maxsfx, c)) continue; if (ppkd && !buf_equal(ppkd, c->details.ccnb.ppkd)) continue; // FIXME: should check stale bit in aok here DEBUGMSG(7, " matching content for interest, content %p\n", (void *) c); ccnl_print_stats(relay, STAT_SND_C); //log sent_c if (from->ifndx >= 0) ccnl_face_enqueue(relay, from, buf_dup(c->pkt)); else ccnl_app_RX(relay, c); goto Skip; } } // CONFORM: Step 2: check whether interest is already known for (i = relay->pit; i; i = i->next) { if (i->suite == CCNL_SUITE_CCNB && !ccnl_prefix_cmp(i->prefix, NULL, p, CMP_EXACT) && i->details.ccnb.minsuffix == minsfx && i->details.ccnb.maxsuffix == maxsfx && ((!ppkd && !i->details.ccnb.ppkd) || buf_equal(ppkd, i->details.ccnb.ppkd)) ) break; } if (!i) { // this is a new/unknown I request: create and propagate i = ccnl_interest_new(relay, from, CCNL_SUITE_CCNB, &buf, &p, minsfx, maxsfx); if (ppkd) i->details.ccnb.ppkd = ppkd, ppkd = NULL; if (i) { // CONFORM: Step 3 (and 4) DEBUGMSG(7, " created new interest entry %p\n", (void *) i); if (scope > 2) ccnl_interest_propagate(relay, i); } } else if (scope > 2 && (from->flags & CCNL_FACE_FLAGS_FWDALLI)) { DEBUGMSG(7, " old interest, nevertheless propagated %p\n", (void *) i); ccnl_interest_propagate(relay, i); } if (i) { // store the I request, for the incoming face (Step 3) DEBUGMSG(7, " appending interest entry %p\n", (void *) i); ccnl_interest_append_pending(i, from); } } else { // content DEBUGMSG(6, " content=<%s>\n", ccnl_prefix_to_path(p)); ccnl_print_stats(relay, STAT_RCV_C); //log count recv_content #ifdef USE_SIGNATURES if (p->compcnt == 2 && !memcmp(p->comp[0], "ccnx", 4) && !memcmp(p->comp[1], "crypto", 6) && from == relay->crypto_face) { rc = ccnl_crypto(relay, buf, p, from); goto Done; } #endif /*USE_SIGNATURES*/ // CONFORM: Step 1: for (c = relay->contents; c; c = c->next) if (buf_equal(c->pkt, buf)) goto Skip; // content is dup c = ccnl_content_new(relay, CCNL_SUITE_CCNB, &buf, &p, &ppkd, content, contlen); if (c) { // CONFORM: Step 2 (and 3) if (!ccnl_content_serve_pending(relay, c)) { // unsolicited content // CONFORM: "A node MUST NOT forward unsolicited data [...]" DEBUGMSG(7, " removed because no matching interest\n"); free_content(c); goto Skip; } if (relay->max_cache_entries != 0) { // it's set to -1 or a limit DEBUGMSG(7, " adding content to cache\n"); ccnl_content_add2cache(relay, c); } else { DEBUGMSG(7, " content not added to cache\n"); free_content(c); } } } Skip: rc = 0; Done: free_prefix(p); free_3ptr_list(buf, nonce, ppkd); return rc; }
int ccnl_core_RX_i_or_c(struct ccnl_relay_s *relay, struct ccnl_face_s *from, unsigned char **data, int *datalen) { int rc = -1, scope = 3, aok = 3, minsfx = 0, maxsfx = CCNL_MAX_NAME_COMP, contlen; struct ccnl_buf_s *buf = 0, *nonce = 0, *ppkd = 0; struct ccnl_interest_s *i = 0; struct ccnl_content_s *c = 0; struct ccnl_prefix_s *p = 0; unsigned char *content = 0; DEBUGMSG(1, "ccnl_core_RX_i_or_c: (%d bytes left)\n", *datalen); buf = ccnl_extract_prefix_nonce_ppkd(data, datalen, &scope, &aok, &minsfx, &maxsfx, &p, &nonce, &ppkd, &content, &contlen); if (!buf) { DEBUGMSG(6, " parsing error or no prefix\n"); goto Done; } if (nonce && ccnl_nonce_find_or_append(relay, nonce)) { DEBUGMSG(6, " dropped because of duplicate nonce\n"); goto Skip; } if (buf->data[0] == 0x01 && buf->data[1] == 0xd2) { // interest DEBUGMSG(1, "ccnl_core_RX_i_or_c: interest=<%s>\n", ccnl_prefix_to_path(p)); from->stat.received_interest++; if (p->compcnt > 0 && p->comp[0][0] == (unsigned char) 0xc1) { goto Skip; } if (p->compcnt == 4 && !memcmp(p->comp[0], "ccnx", 4)) { DEBUGMSG(1, "it's a mgnt msg!\n"); rc = ccnl_mgmt(relay, buf, p, from); DEBUGMSG(1, "mgnt processing done!\n"); goto Done; } // CONFORM: Step 1: if (aok & 0x01) { // honor "answer-from-existing-content-store" flag for (c = relay->contents; c; c = c->next) { if (!ccnl_i_prefixof_c(p, ppkd, minsfx, maxsfx, c)) { continue; } // FIXME: should check stale bit in aok here DEBUGMSG(7, " matching content for interest, content %p\n", (void *) c); from->stat.send_content[c->served_cnt % CCNL_MAX_CONTENT_SERVED_STAT]++; c->served_cnt++; if (from->ifndx >= 0) { ccnl_face_enqueue(relay, from, buf_dup(c->pkt)); } goto Skip; } } // CONFORM: Step 2: check whether interest is already known for (i = relay->pit; i; i = i->next) { if (!ccnl_prefix_cmp(i->prefix, NULL, p, CMP_EXACT) && i->minsuffix == minsfx && i->maxsuffix == maxsfx && ((!ppkd && !i->ppkd) || buf_equal(ppkd, i->ppkd))) { break; } } if (!i) { // this is a new/unknown I request: create and propagate i = ccnl_interest_new(relay, from, &buf, &p, minsfx, maxsfx, &ppkd); if (i) { // CONFORM: Step 3 (and 4) DEBUGMSG(7, " created new interest entry %p\n", (void *) i); if (scope > 2) { ccnl_interest_propagate(relay, i); } } } else if (scope > 2 && (from->flags & CCNL_FACE_FLAGS_FWDALLI)) { DEBUGMSG(7, " old interest, nevertheless propagated %p\n", (void *) i); ccnl_interest_propagate(relay, i); } if (i) { // store the I request, for the incoming face (Step 3) DEBUGMSG(7, " appending interest entry %p\n", (void *) i); ccnl_interest_append_pending(i, from); } } else { // content DEBUGMSG(6, " content=<%s>\n", ccnl_prefix_to_path(p)); from->stat.received_content++; // CONFORM: Step 1: for (c = relay->contents; c; c = c->next) { if (buf_equal(c->pkt, buf)) { DEBUGMSG(1, "content is dup: skip\n"); goto Skip; } } c = ccnl_content_new(relay, &buf, &p, &ppkd, content, contlen); if (c) { // CONFORM: Step 2 (and 3) if (!ccnl_content_serve_pending(relay, c, from)) { // unsolicited content // CONFORM: "A node MUST NOT forward unsolicited data [...]" DEBUGMSG(7, " removed because no matching interest\n"); free_content(c); goto Skip; } #if CCNL_DYNAMIC_FIB else { /* content has matched an interest, we consider this name as available on this face */ ccnl_content_learn_name_route(relay, c->name, from, relay->fib_threshold_prefix, 0); } #endif if (relay->max_cache_entries != 0) { // it's set to -1 or a limit DEBUGMSG(7, " adding content to cache\n"); ccnl_content_add2cache(relay, c); } else { DEBUGMSG(7, " content not added to cache\n"); free_content(c); } } } Skip: rc = 0; Done: free_prefix(p); free_3ptr_list(buf, nonce, ppkd); DEBUGMSG(1, "leaving\n"); return rc; }