* Receive data, and do something with it. * Actually we receive a queue item which holds the data. * If we free the item it will also free the data unless we have previously * disassociated it using the NGI_GET_etf() macro. * Possibly send it out on another link after processing. * Possibly do something different if it comes from different * hooks. The caller will never free m , so if we use
| 361 | * in the connect() method. |
| 362 | */ |
| 363 | static int |
| 364 | ng_etf_rcvdata(hook_p hook, item_p item ) |
| 365 | { |
| 366 | const etf_p etfp = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); |
| 367 | struct ether_header *eh; |
| 368 | int error = 0; |
| 369 | struct mbuf *m; |
| 370 | u_int16_t ethertype; |
| 371 | struct filter *fil; |
| 372 | |
| 373 | if (NG_HOOK_PRIVATE(hook) == NULL) { /* Shouldn't happen but.. */ |
| 374 | NG_FREE_ITEM(item); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * Everything not from the downstream hook goes to the |
| 379 | * downstream hook. But only if it matches the ethertype |
| 380 | * of the source hook. Un matching must go to/from 'nomatch'. |
| 381 | */ |
| 382 | |
| 383 | /* Make sure we have an entire header */ |
| 384 | NGI_GET_M(item, m); |
| 385 | if (m->m_len < sizeof(*eh) ) { |
| 386 | m = m_pullup(m, sizeof(*eh)); |
| 387 | if (m == NULL) { |
| 388 | NG_FREE_ITEM(item); |
| 389 | return(EINVAL); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | eh = mtod(m, struct ether_header *); |
| 394 | ethertype = eh->ether_type; |
| 395 | fil = ng_etf_findentry(etfp, ethertype); |
| 396 | |
| 397 | /* |
| 398 | * if from downstream, select between a match hook or |
| 399 | * the nomatch hook |
| 400 | */ |
| 401 | if (hook == etfp->downstream_hook.hook) { |
| 402 | etfp->packets_in++; |
| 403 | if (fil && fil->match_hook) { |
| 404 | NG_FWD_NEW_DATA(error, item, fil->match_hook, m); |
| 405 | } else { |
| 406 | NG_FWD_NEW_DATA(error, item,etfp->nomatch_hook.hook, m); |
| 407 | } |
| 408 | } else { |
| 409 | /* |
| 410 | * It must be heading towards the downstream. |
| 411 | * Check that it's ethertype matches |
| 412 | * the filters for it's input hook. |
| 413 | * If it doesn't have one, check it's from nomatch. |
| 414 | */ |
| 415 | if ((fil && (fil->match_hook != hook)) |
| 416 | || ((fil == NULL) && (hook != etfp->nomatch_hook.hook))) { |
| 417 | NG_FREE_ITEM(item); |
| 418 | NG_FREE_M(m); |
| 419 | return (EPROTOTYPE); |
| 420 | } |
nothing calls this directly
no test coverage detected