Annotation of libaitrpc/src/aitrpc.c, revision 1.11
1.1 misho 1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.11 ! misho 6: * $Id: aitrpc.c,v 1.10.10.1 2013/08/23 13:13:07 misho Exp $
1.1 misho 7: *
1.2 misho 8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
1.8 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
1.2 misho 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
1.1 misho 46: #include "global.h"
47:
48:
49: #pragma GCC visibility push(hidden)
50:
51: int rpc_Errno;
52: char rpc_Error[STRSIZ];
53:
1.7 misho 54: inline int
55: rpc_funcs_cmp(struct tagRPCFunc *a, struct tagRPCFunc *b)
56: {
57: int ret;
58:
59: assert(a && b);
60:
61: ret = AIT_KEY(&a->func_name) - AIT_KEY(&b->func_name);
62:
63: if (ret < 0)
64: return -1;
65: else if (ret > 0)
66: return 1;
67:
68: return ret;
69: }
70:
71: AVL_GENERATE(tagRPCFuncs, tagRPCFunc, func_node, rpc_funcs_cmp);
72:
1.1 misho 73: #pragma GCC visibility pop
74:
75: // rpc_GetErrno() Get error code of last operation
1.10 misho 76: int
1.1 misho 77: rpc_GetErrno()
78: {
79: return rpc_Errno;
80: }
81:
82: // rpc_GetError() Get error text of last operation
1.10 misho 83: const char *
1.1 misho 84: rpc_GetError()
85: {
86: return rpc_Error;
87: }
88:
89: // rpc_SetErr() Set error to variables for internal use!!!
1.10 misho 90: void
1.1 misho 91: rpc_SetErr(int eno, char *estr, ...)
92: {
93: va_list lst;
94:
95: rpc_Errno = eno;
1.8 misho 96: memset(rpc_Error, 0, sizeof rpc_Error);
1.1 misho 97: va_start(lst, estr);
1.8 misho 98: vsnprintf(rpc_Error, sizeof rpc_Error, estr, lst);
1.1 misho 99: va_end(lst);
100: }
101:
102:
1.4 misho 103: /*
1.6 misho 104: * rpc_chkPktSession() - Check RPC session
1.5 misho 105: *
1.4 misho 106: * @p = packet session
107: * @s = active session
1.6 misho 108: * return: -1, 1, 2, 3 are errors or 0 ok
1.4 misho 109: */
1.10 misho 110: int
1.4 misho 111: rpc_chkPktSession(rpc_sess_t *p, rpc_sess_t *s)
112: {
113: if (!p || !s)
114: return -1;
115:
116: if (p->sess_version != s->sess_version)
117: return 1;
1.9 misho 118: if (p->sess_instance != s->sess_instance)
1.4 misho 119: return 2;
120:
121: return 0;
122: }
123:
124: /*
1.6 misho 125: * rpc_addPktSession() - Prepare session into network format
1.5 misho 126: *
1.4 misho 127: * @p = packet session
1.6 misho 128: * @s = host session
1.4 misho 129: * return: -1 error or 0 ok
130: */
1.10 misho 131: int
1.4 misho 132: rpc_addPktSession(rpc_sess_t *p, rpc_sess_t *s)
133: {
134: if (!p || !s)
135: return -1;
136:
137: p->sess_version = s->sess_version;
1.9 misho 138: p->sess_instance = s->sess_instance;
1.4 misho 139:
140: return 0;
141: }
1.11 ! misho 142:
! 143: /*
! 144: * rpc_Read() - RPC read operation
! 145: *
! 146: * @sock = socket
! 147: * @type = type of socket
! 148: * @flags = receive flags
! 149: * @sa = check client address, if you use udp protocol
! 150: * @buf = buffer
! 151: * @blen = buffer length
! 152: * return: -1 error or >-1 readed bytes into buffer
! 153: */
! 154: ssize_t
! 155: rpc_Read(int sock, int type, int flags, sockaddr_t * __restrict sa,
! 156: u_char * __restrict buf, size_t blen)
! 157: {
! 158: struct pollfd pfd;
! 159: sockaddr_t sa2;
! 160: socklen_t salen;
! 161: int ret = 0, len;
! 162:
! 163: pfd.fd = sock;
! 164: pfd.events = POLLIN | POLLPRI;
! 165: memset(buf, 0, blen);
! 166: memset(&sa2, 0, sizeof sa2);
! 167: salen = sa2.ss.ss_len = sizeof(sockaddr_t);
! 168:
! 169: if (type == SOCK_STREAM) {
! 170: for (len = blen; len > 0; len -= ret, buf += ret) {
! 171: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
! 172: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
! 173: LOGERR;
! 174: return -1;
! 175: } else
! 176: ret = recv(sock, buf, len, flags);
! 177: if (ret == -1) {
! 178: LOGERR;
! 179: return -1;
! 180: }
! 181: }
! 182: if (ret > -1)
! 183: ret = blen - len;
! 184: } else {
! 185: do {
! 186: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
! 187: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
! 188: LOGERR;
! 189: return -1;
! 190: } else
! 191: ret = recvfrom(sock, buf, blen, flags, &sa2.sa, &salen);
! 192: if (ret < 0) {
! 193: LOGERR;
! 194: return -1;
! 195: }
! 196: if (e_addrcmp(sa, &sa2, 42))
! 197: rpc_SetErr(ERPCMISMATCH, "Received RPC response from unknown address");
! 198: else
! 199: break;
! 200: } while (42);
! 201: }
! 202:
! 203: return ret;
! 204: }
! 205:
! 206: /*
! 207: * rpc_Write() - RPC write operation
! 208: *
! 209: * @sock = socket
! 210: * @type = type of socket
! 211: * @flags = send flags
! 212: * @sa = send to client address, if you use udp protocol
! 213: * @buf = buffer
! 214: * @blen = buffer length
! 215: * return: -1 error or >-1 written bytes into buffer
! 216: */
! 217: ssize_t
! 218: rpc_Write(int sock, int type, int flags, sockaddr_t * __restrict sa,
! 219: u_char * __restrict buf, size_t blen)
! 220: {
! 221: struct pollfd pfd;
! 222: int ret = 0, len = 0;
! 223:
! 224: pfd.fd = sock;
! 225: pfd.events = POLLOUT;
! 226:
! 227: if (type == SOCK_STREAM) {
! 228: for (len = blen; len > 0; len -= ret, buf += ret) {
! 229: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
! 230: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
! 231: LOGERR;
! 232: return -1;
! 233: } else
! 234: ret = send(sock, buf, len, flags);
! 235: if (ret == -1) {
! 236: LOGERR;
! 237: return -1;
! 238: }
! 239: }
! 240: if (ret > -1)
! 241: ret = blen - len;
! 242: } else if (sa) {
! 243: if ((ret = poll(&pfd, 1, DEF_RPC_TIMEOUT * 1000)) < 1 ||
! 244: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
! 245: LOGERR;
! 246: return -1;
! 247: } else
! 248: ret = sendto(sock, buf, blen, flags, &sa->sa, sa->sa.sa_len);
! 249: } else {
! 250: rpc_SetErr(EINVAL, "Invalid argument(s)!");
! 251: return -1;
! 252: }
! 253: if (ret == -1) {
! 254: LOGERR;
! 255: return -1;
! 256: } else if (ret != blen) {
! 257: rpc_SetErr(EPROCUNAVAIL, "RPC request, should be send %d bytes, "
! 258: "really sended %d bytes", len, ret);
! 259: return -1;
! 260: }
! 261:
! 262: return ret;
! 263: }
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