Omron CS CJ1W-ETN21 - Manual (Page 194)

170
FINS/UDP Method Section 7-3
85 /* RECEIVE FINS RESPONSE*/
86 addrlen = sizeof(cs_addr);
87
88 if ((recvlen = recvfrom(sockfd,fins_resp,MAX_MSG,0,&cs_addr,&addrlen)) < 0)
89 {
90 if (errno == EINTR)
91 goto CMND_SEND; /*
92 err_exit("receive error");
93 }
94 else
95 {
96 alarm(0); /*
97 printf("recv length %d¥n",recvlen);
98
99 if (recvlen < 14) /*
100 err_exit("FINS length error");
101 if ((fins_cmnd[3] != fins_resp[6]) || (fins_cmnd[4] != fins_resp[7]) ||
102 (fins_cmnd[5] != fins_resp[8]) )
103 { /*
104 err_exit("illegal source address error");
105 }
106 if(fins_cmnd[9] != fins_resp[9]) /* SID CHECK*/
107 err_exit("illegal SID error");
108 }
109
110 /*
111 close(sockfd);
112
113 }
114
115
116 /*
117 *
118 */
119 err_exit(err_msg)
120 char *err_msg;
121 {
122 printf("client: %s %x¥n",err_msg,errno);
123 exit(1);
124 }
125
126 /*
127 *
128 */
129 recv_fail()
130 {
131 printf("response timeout error ¥n");
132 }
RE-SEND FINS COMMAND*/
STOP RESPONSE MONITOR TIMER*/
ILLEGAL RESPONSE LENGTH CHECK*/
DESTINATION ADDRESS CHECK*/
CLOSE SOCKET*/
ERROR PROCESSING FUNCTIONS
SIGNAL CAPTURE FUNCTIONS