Annotation of libaitmqtt/src/cmds.c, revision 1.4.2.1
1.4.2.1 ! misho 1: /*************************************************************************
! 2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
! 3: * by Michael Pounov <misho@elwix.org>
! 4: *
! 5: * $Author: misho $
! 6: * $Id: aitmqtt.c,v 1.3.4.4 2022/09/14 14:32:48 misho Exp $
! 7: *
! 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:
! 15: Copyright 2004 - 2022
! 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: */
1.2 misho 46: #include "global.h"
47:
48:
49: #pragma GCC visibility push(hidden)
50:
1.4 misho 51: int
1.2 misho 52: mqtt_wait4data(int sock, u_short ka, short events)
53: {
54: int ret = 0;
55: struct pollfd pfd;
56:
57: if (sock < 3)
58: return -1; /* error */
59:
60: pfd.fd = sock;
61: pfd.events = POLLOUT;
62: if ((ret = poll(&pfd, 1, ka * 1000)) == -1 ||
63: pfd.revents & (POLLERR | POLLHUP | POLLNVAL)) {
64: LOGERR;
65: return -1; /* error */
66: } else if (!ret)
67: return 1; /* timeout */
68:
69: return 0; /* ready */
70: }
71:
72: #pragma GCC visibility pop
73:
74:
75: /*
76: * mqtt_KeepAlive() - Keep Alive check routine
77: *
78: * @sock = connected socket
79: * @ka = keep alive timeout
80: * @tries = tries for receive correct ping response, usually ==1
81: * return: -1 error, 0 host is alive, 1 timeout session or 2 broken session
82: */
83: int
84: mqtt_KeepAlive(int sock, u_short ka, u_char tries)
85: {
86: int ret = 0;
1.4.2.1 ! misho 87: mqtt_msg_t *msg = NULL;
1.2 misho 88:
89: if (sock < 3)
90: return -1; /* error */
91:
1.4.2.1 ! misho 92: if (mqtt_wait4data(sock, ka, POLLOUT))
1.2 misho 93: return ret;
94: /* ping request */
1.4.2.1 ! misho 95: if (!(msg = mqtt_msgPINGREQ()))
1.2 misho 96: return -1; /* error */
1.4.2.1 ! misho 97: if ((ret = send(sock, msg->msg_base, msg->msg_len, MSG_NOSIGNAL)) == -1) {
1.2 misho 98: LOGERR;
99: goto end;
1.4.2.1 ! misho 100: } else
! 101: mqtt_msgFree(&msg, 0);
1.2 misho 102:
103: while (tries--) {
104: if ((ret = mqtt_wait4data(sock, ka, POLLIN | POLLPRI))) {
105: if (ret == -1)
106: break;
107: else
108: continue;
109: }
110: /* receive & decode packet */
1.4.2.1 ! misho 111: msg = mqtt_msgAlloc(BUFSIZ);
! 112: if ((ret = recv(sock, msg->msg_base, msg->msg_len, 0)) == -1) {
1.2 misho 113: LOGERR;
114: break;
115: }
116: if (!mqtt_readPINGRESP(&msg)) {
117: ret = 0; /* Host is alive */
118: break;
119: } else
120: ret = 2; /* Session is broken ... must be disconnect! */
121: }
122: end:
1.4.2.1 ! misho 123: mqtt_msgFree(&msg, 0);
1.2 misho 124: return ret;
125: }
1.3 misho 126:
1.4.2.1 ! misho 127: #if 0
1.3 misho 128: /*
129: * mqtt_WillMessage() - Publish WILL message
130: *
131: * @sock = connected socket
132: * @ka = keep alive timeout
133: * @topic = will topic
134: * @data = will message
135: * return: -1 error, 1 timeout, 2 not ack or 0 ok
136: */
137: int
138: mqtt_WillMessage(int sock, u_short ka, const char *topic, const char *data)
139: {
140: int ret = 0;
141: mqtt_msg_t msg = { NULL, 0 };
142:
143: if (!topic)
144: return -1; /* error */
145:
146: /* will message */
147: if ((ret = mqtt_wait4data(sock, ka, POLLOUT)))
148: return ret;
149: ret = mqtt_msgPUBLISH(&msg, topic, 0xDEAD, 0, 1, 0, data, data ? strlen(data) : 0);
150: if (ret == -1)
151: return -1; /* error */
152: if ((ret = send(sock, msg.msg_base, ret, MSG_NOSIGNAL)) == -1) {
153: LOGERR;
154: free(msg.msg_base);
155: return -1; /* error */
156: } else
157: memset(msg.msg_base, 0, msg.msg_len);
158:
159: /* will ack */
160: if ((ret = mqtt_wait4data(sock, ka, POLLIN | POLLPRI))) {
161: free(msg.msg_base);
162: return ret;
163: }
164: /* receive & decode packet */
165: if ((ret = recv(sock, msg.msg_base, msg.msg_len, 0)) == -1) {
166: LOGERR;
167: free(msg.msg_base);
168: return -1; /* error */
169: }
170: if (mqtt_readPUBACK(&msg))
171: ret = 0; /* ok */
172: else
173: ret = 2; /* semi-error */
174:
175: free(msg.msg_base);
176: return ret;
177: }
1.4.2.1 ! misho 178: #endif
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to cmds.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / libaitmqtt / src