void icpUdpSendQueue(int fd, void *unused) { icpUdpData *q; int x; int delay; while ((q = IcpQueueHead) != NULL) { delay = tvSubUsec(q->queue_time, current_time); /* increment delay to prevent looping */ x = icpUdpSend(fd, &q->address, q->msg, q->logcode, ++delay); IcpQueueHead = q->next; safe_free(q); if (x < 0) break; } }
static void peerCountMcastPeersStart(void *data) { peer *p = data; ps_state *psstate; StoreEntry *fake; MemObject *mem; icp_common_t *query; int reqnum; method_t *method_get; LOCAL_ARRAY(char, url, MAX_URL); assert(p->type == PEER_MULTICAST); method_get = urlMethodGetKnownByCode(METHOD_GET); p->mcast.flags.count_event_pending = 0; snprintf(url, MAX_URL, "http://%s/", inet_ntoa(p->in_addr.sin_addr)); fake = storeCreateEntry(url, null_request_flags, method_get); psstate = cbdataAlloc(ps_state); psstate->request = requestLink(urlParse(method_get, url)); psstate->entry = fake; psstate->callback = NULL; psstate->callback_data = p; cbdataLock(psstate->callback_data); psstate->ping.start = current_time; mem = fake->mem_obj; mem->request = requestLink(psstate->request); mem->start_ping = current_time; mem->ping_reply_callback = peerCountHandleIcpReply; mem->ircb_data = psstate; mcastSetTtl(theOutIcpConnection, p->mcast.ttl); p->mcast.id = mem->id; reqnum = icpSetCacheKey(fake->hash.key); query = icpCreateMessage(ICP_QUERY, 0, url, reqnum, 0); icpUdpSend(theOutIcpConnection, &p->in_addr, query, LOG_ICP_QUERY, 0); fake->ping_status = PING_WAITING; eventAdd("peerCountMcastPeersDone", peerCountMcastPeersDone, psstate, Config.Timeout.mcast_icp_query / 1000.0, 1); p->mcast.flags.counting = 1; peerCountMcastPeersSchedule(p, MCAST_COUNT_RATE); }
int neighborsUdpPing(request_t * request, StoreEntry * entry, IRCB * callback, void *callback_data, int *exprep, int *timeout) { const char *url = storeUrl(entry); MemObject *mem = entry->mem_obj; peer *p = NULL; int i; int reqnum = 0; int flags; icp_common_t *query; int queries_sent = 0; int peers_pinged = 0; int parent_timeout = 0, parent_exprep = 0; int sibling_timeout = 0, sibling_exprep = 0; int mcast_timeout = 0, mcast_exprep = 0; if (Config.peers == NULL) return 0; if (theOutIcpConnection < 0) fatal("neighborsUdpPing: There is no ICP socket!"); assert(entry->swap_status == SWAPOUT_NONE); mem->start_ping = current_time; mem->ping_reply_callback = callback; mem->ircb_data = callback_data; reqnum = icpSetCacheKey(entry->hash.key); for (i = 0, p = first_ping; i++ < Config.npeers; p = p->next) { if (p == NULL) p = Config.peers; debug(15, 5) ("neighborsUdpPing: Peer %s\n", p->name); if (!peerWouldBePinged(p, request)) continue; /* next peer */ peers_pinged++; debug(15, 4) ("neighborsUdpPing: pinging peer %s for '%s'\n", p->name, url); if (p->type == PEER_MULTICAST) mcastSetTtl(theOutIcpConnection, p->mcast.ttl); debug(15, 3) ("neighborsUdpPing: key = '%s'\n", storeKeyText(entry->hash.key)); debug(15, 3) ("neighborsUdpPing: reqnum = %d\n", reqnum); #if USE_HTCP if (p->options.htcp && !p->options.htcp_only_clr) { debug(15, 3) ("neighborsUdpPing: sending HTCP query\n"); htcpQuery(entry, request, p); } else #endif if (p->icp.port == echo_port) { debug(15, 4) ("neighborsUdpPing: Looks like a dumb cache, send DECHO ping\n"); echo_hdr.reqnum = reqnum; query = icpCreateMessage(ICP_DECHO, 0, url, reqnum, 0); icpUdpSend(theOutIcpConnection, &p->in_addr, query, LOG_ICP_QUERY, 0); } else { flags = 0; if (Config.onoff.query_icmp) if (p->icp.version == ICP_VERSION_2) flags |= ICP_FLAG_SRC_RTT; query = icpCreateMessage(ICP_QUERY, flags, url, reqnum, 0); icpUdpSend(theOutIcpConnection, &p->in_addr, query, LOG_ICP_QUERY, 0); } queries_sent++; p->stats.pings_sent++; if (p->type == PEER_MULTICAST) { mcast_exprep += p->mcast.n_replies_expected; mcast_timeout += (p->stats.rtt * p->mcast.n_replies_expected); } else if (neighborUp(p)) { /* its alive, expect a reply from it */ if (neighborType(p, request) == PEER_PARENT) { parent_exprep++; parent_timeout += p->stats.rtt; } else { sibling_exprep++; sibling_timeout += p->stats.rtt; } } else { /* Neighbor is dead; ping it anyway, but don't expect a reply */ /* log it once at the threshold */ if (p->stats.logged_state == PEER_ALIVE) { debug(15, 1) ("Detected DEAD %s: %s\n", neighborTypeStr(p), p->name); p->stats.logged_state = PEER_DEAD; } } p->stats.last_query = squid_curtime; /* * keep probe_start == 0 for a multicast peer, * so neighborUp() never says this peer is dead. */ if ((p->type != PEER_MULTICAST) && (p->stats.probe_start == 0)) p->stats.probe_start = squid_curtime; } if ((first_ping = first_ping->next) == NULL) first_ping = Config.peers; #if ALLOW_SOURCE_PING /* only do source_ping if we have neighbors */ if (Config.npeers) { const ipcache_addrs *ia = NULL; struct sockaddr_in to_addr; char *host = request->host; if (!Config.onoff.source_ping) { debug(15, 6) ("neighborsUdpPing: Source Ping is disabled.\n"); } else if ((ia = ipcache_gethostbyname(host, 0))) { debug(15, 6) ("neighborsUdpPing: Source Ping: to %s for '%s'\n", host, url); echo_hdr.reqnum = reqnum; if (icmp_sock != -1) { icmpSourcePing(ia->in_addrs[ia->cur], &echo_hdr, url); } else { to_addr.sin_family = AF_INET; to_addr.sin_addr = ia->in_addrs[ia->cur]; to_addr.sin_port = htons(echo_port); query = icpCreateMessage(ICP_SECHO, 0, url, reqnum, 0); icpUdpSend(theOutIcpConnection, &to_addr, query, LOG_ICP_QUERY, 0); } } else { debug(15, 6) ("neighborsUdpPing: Source Ping: unknown host: %s\n", host); } } #endif /* * How many replies to expect? */ *exprep = parent_exprep + sibling_exprep + mcast_exprep; /* * If there is a configured timeout, use it */ if (Config.Timeout.icp_query) *timeout = Config.Timeout.icp_query; else { if (*exprep > 0) { if (parent_exprep) *timeout = 2 * parent_timeout / parent_exprep; else if (mcast_exprep) *timeout = 2 * mcast_timeout / mcast_exprep; else *timeout = 2 * sibling_timeout / sibling_exprep; } else *timeout = 2000; /* 2 seconds */ if (Config.Timeout.icp_query_max) if (*timeout > Config.Timeout.icp_query_max) *timeout = Config.Timeout.icp_query_max; if (*timeout < Config.Timeout.icp_query_min) *timeout = Config.Timeout.icp_query_min; } return peers_pinged; }
static void icpHandleIcpV2(int fd, struct sockaddr_in from, char *buf, int len) { icp_common_t header; StoreEntry *entry = NULL; char *url = NULL; const cache_key *key; request_t *icp_request = NULL; int allow = 0; aclCheck_t checklist; icp_common_t *reply; int src_rtt = 0; u_num32 flags = 0; int rtt = 0; int hops = 0; xmemcpy(&header, buf, sizeof(icp_common_t)); /* * Only these fields need to be converted */ header.length = ntohs(header.length); header.reqnum = ntohl(header.reqnum); header.flags = ntohl(header.flags); header.pad = ntohl(header.pad); /* * Length field should match the number of bytes read */ if (len != header.length) { debug(12, 3) ("icpHandleIcpV2: ICP message is too small\n"); return; } switch (header.opcode) { case ICP_QUERY: /* We have a valid packet */ url = buf + sizeof(icp_common_t) + sizeof(u_num32); if (strpbrk(url, w_space)) { url = rfc1738_escape(url); reply = icpCreateMessage(ICP_ERR, 0, url, header.reqnum, 0); icpUdpSend(fd, &from, reply, LOG_UDP_INVALID, 0); break; } if ((icp_request = urlParse(METHOD_GET, url)) == NULL) { reply = icpCreateMessage(ICP_ERR, 0, url, header.reqnum, 0); icpUdpSend(fd, &from, reply, LOG_UDP_INVALID, 0); break; } memset(&checklist, '\0', sizeof(checklist)); checklist.src_addr = from.sin_addr; checklist.my_addr = no_addr; checklist.request = icp_request; allow = aclCheckFast(Config.accessList.icp, &checklist); if (!allow) { debug(12, 2) ("icpHandleIcpV2: Access Denied for %s by %s.\n", inet_ntoa(from.sin_addr), AclMatchedName); if (clientdbCutoffDenied(from.sin_addr)) { /* * count this DENIED query in the clientdb, even though * we're not sending an ICP reply... */ clientdbUpdate(from.sin_addr, LOG_UDP_DENIED, PROTO_ICP, 0); } else { reply = icpCreateMessage(ICP_DENIED, 0, url, header.reqnum, 0); icpUdpSend(fd, &from, reply, LOG_UDP_DENIED, 0); } break; } if (header.flags & ICP_FLAG_SRC_RTT) { rtt = netdbHostRtt(icp_request->host); hops = netdbHostHops(icp_request->host); src_rtt = ((hops & 0xFFFF) << 16) | (rtt & 0xFFFF); if (rtt) flags |= ICP_FLAG_SRC_RTT; } /* The peer is allowed to use this cache */ entry = storeGetPublic(url, METHOD_GET); debug(12, 5) ("icpHandleIcpV2: OPCODE %s\n", icp_opcode_str[header.opcode]); if (icpCheckUdpHit(entry, icp_request)) { reply = icpCreateMessage(ICP_HIT, flags, url, header.reqnum, src_rtt); icpUdpSend(fd, &from, reply, LOG_UDP_HIT, 0); break; } if (Config.onoff.test_reachability && rtt == 0) { if ((rtt = netdbHostRtt(icp_request->host)) == 0) netdbPingSite(icp_request->host); } /* if store is rebuilding, return a UDP_HIT, but not a MISS */ if (store_dirs_rebuilding && opt_reload_hit_only) { reply = icpCreateMessage(ICP_MISS_NOFETCH, flags, url, header.reqnum, src_rtt); icpUdpSend(fd, &from, reply, LOG_UDP_MISS_NOFETCH, 0); } else if (hit_only_mode_until > squid_curtime) { reply = icpCreateMessage(ICP_MISS_NOFETCH, flags, url, header.reqnum, src_rtt); icpUdpSend(fd, &from, reply, LOG_UDP_MISS_NOFETCH, 0); } else if (Config.onoff.test_reachability && rtt == 0) { reply = icpCreateMessage(ICP_MISS_NOFETCH, flags, url, header.reqnum, src_rtt); icpUdpSend(fd, &from, reply, LOG_UDP_MISS_NOFETCH, 0); } else { reply = icpCreateMessage(ICP_MISS, flags, url, header.reqnum, src_rtt); icpUdpSend(fd, &from, reply, LOG_UDP_MISS, 0); } break; case ICP_HIT: #if ALLOW_SOURCE_PING case ICP_SECHO: #endif case ICP_DECHO: case ICP_MISS: case ICP_DENIED: case ICP_MISS_NOFETCH: if (neighbors_do_private_keys && header.reqnum == 0) { debug(12, 0) ("icpHandleIcpV2: Neighbor %s returned reqnum = 0\n", inet_ntoa(from.sin_addr)); debug(12, 0) ("icpHandleIcpV2: Disabling use of private keys\n"); neighbors_do_private_keys = 0; } url = buf + sizeof(icp_common_t); debug(12, 3) ("icpHandleIcpV2: %s from %s for '%s'\n", icp_opcode_str[header.opcode], inet_ntoa(from.sin_addr), url); key = icpGetCacheKey(url, (int) header.reqnum); /* call neighborsUdpAck even if ping_status != PING_WAITING */ neighborsUdpAck(key, &header, &from); break; case ICP_INVALID: case ICP_ERR: break; default: debug(12, 0) ("icpHandleIcpV2: UNKNOWN OPCODE: %d from %s\n", header.opcode, inet_ntoa(from.sin_addr)); break; } if (icp_request) requestDestroy(icp_request); }