version 1.10, 2013/05/30 09:22:01
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version 1.17.2.3, 2015/05/18 15:00:54
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Line 12 terms:
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Line 12 terms:
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All of the documentation and software included in the ELWIX and AITNET |
All of the documentation and software included in the ELWIX and AITNET |
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
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Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 | Copyright 2004 - 2015 |
by Michael Pounov <misho@elwix.org>. All rights reserved. |
by Michael Pounov <misho@elwix.org>. All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
Redistribution and use in source and binary forms, with or without |
Line 138 rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s)
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Line 138 rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s)
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p->sess_instance = s->sess_instance; |
p->sess_instance = s->sess_instance; |
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return 0; |
return 0; |
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} |
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/* |
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* rpc_Read() - RPC read operation |
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* |
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* @sock = socket |
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* @type = type of socket |
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* @flags = receive flags |
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* @sa = check client address, if you use udp protocol |
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* @pkt = RPC packet |
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* return: -1 error, 0 EOF or or >0 readed bytes into buffer |
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*/ |
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ssize_t |
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rpc_Read(int sock, int type, int flags, sockaddr_t * __restrict sa, ait_val_t * __restrict pkt) |
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{ |
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struct pollfd pfd; |
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sockaddr_t sa2; |
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socklen_t salen; |
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int ret = 0, len, hlen, cx = 0; |
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ait_val_t v = AIT_VAL_INIT; |
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struct ether_header *eh; |
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struct bpf_hdr *h; |
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ether_addr_t bcst = {{ [0 ... sizeof bcst - 1] = 0xff }}; |
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u_char *buf = AIT_GET_BUF(pkt); |
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size_t blen = AIT_LEN(pkt); |
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struct tagRPCCall *rpc = (struct tagRPCCall *) buf; |
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if (type == SOCK_BPF && sa) { |
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AIT_SET_BUF(&v, NULL, blen); |
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h = (struct bpf_hdr*) AIT_GET_BUF(&v); |
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} |
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pfd.fd = sock; |
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pfd.events = POLLIN | POLLPRI; |
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memset(buf, 0, blen); |
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memset(&sa2, 0, sizeof sa2); |
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salen = sa2.ss.ss_len = sizeof(sockaddr_t); |
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for (len = blen; len > 0; len -= ret, buf += ret) { |
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if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || |
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pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { |
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if (ret) |
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LOGERR; |
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else |
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rpc_SetErr(ETIMEDOUT, "Timeout reached! Server not respond"); |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (type == SOCK_STREAM) |
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ret = recv(sock, buf, len, flags); |
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else if (type == SOCK_EXT) |
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ret = read(sock, buf, len); |
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else if (type == SOCK_BPF && sa) { |
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ret = read(sock, AIT_GET_BUF(&v), AIT_LEN(&v)); |
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if (ret > 0) { |
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ret -= h->bh_hdrlen; |
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if (ret < h->bh_caplen || h->bh_caplen != h->bh_datalen || |
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ret < ETHER_HDR_LEN + sizeof(struct tagRPCCall)) { |
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if (cx < 3) { |
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cx++; |
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ret ^= ret; |
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continue; /* wait for known address */ |
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} else { |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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} |
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ret = h->bh_caplen; |
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eh = (struct ether_header*) (AIT_GET_BUF(&v) + h->bh_hdrlen); |
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ret -= ETHER_HDR_LEN; |
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if (eh->ether_type != ntohs(RPC_DEFPORT)) { |
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if (cx < 3) { |
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cx++; |
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ret ^= ret; |
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continue; /* wait for known address */ |
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} else { |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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} |
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if (!memcmp(bcst.octet, eh->ether_dhost, sizeof bcst) || |
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!memcmp(bcst.octet, eh->ether_shost, sizeof bcst)) { |
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if (cx < 3) { |
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cx++; |
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ret ^= ret; |
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continue; /* wait for known address */ |
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} else { |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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} |
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memcpy(buf, (u_char*) (eh + 1), MIN(ret, len)); |
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AIT_FREE_VAL(&v); |
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return ret; |
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} |
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} else { |
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ret = recvfrom(sock, buf, len, flags, &sa2.sa, &salen); |
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if (ret > -1 && sa && e_addrcmp(sa, &sa2, 42)) { |
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if (cx < 3) { |
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cx++; |
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ret ^= ret; |
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continue; /* wait for known address */ |
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} else |
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return -1; |
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} |
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} |
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if (ret < 0) { |
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LOGERR; |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (!ret) { /* EOF */ |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return 0; |
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} |
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/* check RPC packet header */ |
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if ((u_char*) rpc == buf) { |
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if (type == SOCK_RAW) { |
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hlen = sa->sa.sa_family == AF_INET ? sizeof(struct ip) : sizeof(struct ip6_hdr); |
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ret -= hlen; |
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if (ret > 0) |
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memmove(buf, buf + hlen, blen - hlen); |
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} |
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/* 1st read for RPC header */ |
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if (ret < sizeof(struct tagRPCCall)) { |
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rpc_SetErr(ERPCMISMATCH, "Short RPC packet %d bytes", ret); |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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/* check for loop request */ |
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if (!(rpc->call_io & RPC_ACK)) { |
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ret ^= ret; |
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continue; |
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} |
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/* calc estimated length */ |
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blen = len = ntohl(rpc->call_len); |
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if (blen > AIT_LEN(pkt)) { |
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AIT_RE_BUF(pkt, blen); |
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buf = AIT_GET_BUF(pkt); |
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rpc = (struct tagRPCCall*) buf; |
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} |
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} |
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} |
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ret = blen - len; |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return ret; |
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} |
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/* |
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* rpc_Write() - RPC write operation |
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* |
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* @sock = socket |
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* @type = type of socket |
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* @flags = send flags |
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* @sa = send to client address, if you use udp protocol |
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* @pkt = RPC packet |
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* @blen = buffer length |
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* return: -1 error, 0 EOF or >0 written bytes into buffer |
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*/ |
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ssize_t |
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rpc_Write(int sock, int type, int flags, sockaddr_t * __restrict sa, |
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ait_val_t * __restrict pkt, size_t blen) |
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{ |
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struct pollfd pfd; |
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int ret = 0, len = 0; |
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ait_val_t v = AIT_VAL_INIT; |
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struct ether_header *eh; |
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u_char *buf = AIT_GET_BUF(pkt); |
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if (type == SOCK_BPF && sa) { |
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AIT_SET_BUF(&v, NULL, blen + sizeof(struct ether_header)); |
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eh = (struct ether_header*) AIT_GET_BUF(&v); |
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memcpy(eh->ether_dhost, LLADDR(&sa->sdl), ETHER_ADDR_LEN); |
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eh->ether_type = htons(RPC_DEFPORT); |
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memcpy(eh + 1, buf, blen); |
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blen += sizeof(struct ether_header); |
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} |
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pfd.fd = sock; |
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pfd.events = POLLOUT; |
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for (len = blen; len > 0; len -= ret, buf += ret) { |
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if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 || |
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pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) { |
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#if 0 |
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if (!ret) |
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continue; |
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#endif |
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if (ret > 0) |
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rpc_SetErr(EPIPE, "Disconnected RPC session\n"); |
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else |
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LOGERR; |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (type == SOCK_STREAM) |
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ret = send(sock, buf, len, flags); |
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else if (type == SOCK_EXT) |
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ret = write(sock, buf, len); |
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else if (type == SOCK_BPF && sa) { |
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ret = write(sock, AIT_GET_BUF(&v), AIT_LEN(&v)); |
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} else if (sa) |
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ret = sendto(sock, buf, len, flags, &sa->sa, sa->sa.sa_len); |
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else { |
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rpc_SetErr(EINVAL, "Invalid argument(s)!"); |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (ret < 0) { |
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LOGERR; |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (!ret) { /* EOF */ |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return 0; |
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} |
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} |
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ret = blen - len; |
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if (ret != blen) { |
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rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, " |
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"really sended %d bytes", blen, ret); |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return -1; |
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} |
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if (type == SOCK_BPF) |
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AIT_FREE_VAL(&v); |
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return ret; |
} |
} |