From fb1126e1e63d98c5989c41fb208cfd2ddce5ee94 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周二, 25 12月 2012 00:44:50 +0800
Subject: [PATCH] Add TCP example
---
examples/test-tcp/main.c | 176 ++++++++++++++++++++++++++++++++++++++++++++++------------
1 files changed, 138 insertions(+), 38 deletions(-)
diff --git a/examples/test-tcp/main.c b/examples/test-tcp/main.c
index d5e3553..55dc792 100644
--- a/examples/test-tcp/main.c
+++ b/examples/test-tcp/main.c
@@ -29,7 +29,7 @@
* @file main.c
* @date Thu Nov 15 10:58:45 UTC 2012
*
- * @brief SCPI parser test
+ * @brief TCP/IP SCPI Server
*
*
*/
@@ -37,17 +37,28 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+
+#include <netinet/in.h>
+#include <sys/select.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <arpa/inet.h>
+
#include "scpi/scpi.h"
#include "../common/scpi-def.h"
size_t SCPI_Write(scpi_t * context, const char * data, size_t len) {
- (void) context;
- return fwrite(data, 1, len, stdout);
+ if (context->user_context != NULL) {
+ int fd = *(int *)(context->user_context);
+ return write(fd, data, len);
+ }
+ return 0;
}
int SCPI_Error(scpi_t * context, int_fast16_t err) {
(void) context;
-
+ // BEEP
fprintf(stderr, "**ERROR: %d, \"%s\"\r\n", (int32_t) err, SCPI_ErrorTranslate(err));
return 0;
}
@@ -68,55 +79,144 @@
return SCPI_RES_OK;
}
+
+static int createServer(int port) {
+ int fd;
+ int rc;
+ int on = 1;
+ struct sockaddr_in servaddr;
+
+ /* Configure TCP Server */
+ bzero(&servaddr, sizeof(servaddr));
+ servaddr.sin_family = AF_INET;
+ servaddr.sin_addr.s_addr=htonl(INADDR_ANY);
+ servaddr.sin_port=htons(port);
+
+ /* Create socket */
+ fd = socket(AF_INET,SOCK_STREAM, 0);
+ if (fd < 0)
+ {
+ perror("socket() failed");
+ exit(-1);
+ }
+
+ /* Set address reuse enable */
+ rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on));
+ if (rc < 0)
+ {
+ perror("setsockopt() failed");
+ close(fd);
+ exit(-1);
+ }
+
+ /* Set non blocking */
+ rc = ioctl(fd, FIONBIO, (char *)&on);
+ if (rc < 0)
+ {
+ perror("ioctl() failed");
+ close(fd);
+ exit(-1);
+ }
+
+ /* Bind to socket */
+ rc = bind(fd, (struct sockaddr *)&servaddr, sizeof(servaddr));
+ if (rc < 0)
+ {
+ perror("bind() failed");
+ close(fd);
+ exit(-1);
+ }
+
+ /* Listen on socket */
+ listen(fd, 1);
+ if (rc < 0)
+ {
+ perror("listen() failed");
+ close(fd);
+ exit(-1);
+ }
+
+ return fd;
+}
+
+static int waitServer(int fd) {
+ fd_set fds;
+ struct timeval timeout;
+ int rc;
+ int max_fd;
+
+ FD_ZERO(&fds);
+ max_fd = fd;
+ FD_SET(fd, &fds);
+
+ timeout.tv_sec = 5;
+ timeout.tv_usec = 0;
+
+ rc = select(max_fd + 1, &fds, NULL, NULL, &timeout);
+
+ return rc;
+}
+
/*
*
*/
int main(int argc, char** argv) {
(void) argc;
(void) argv;
- int result;
+ int rc;
+ int listenfd;
+ char smbuffer[10];
+
+ // user_context will be pointer to socket
+ scpi_context.user_context = NULL;
+
SCPI_Init(&scpi_context);
-#define TEST_SCPI_INPUT(cmd) result = SCPI_Input(&scpi_context, cmd, strlen(cmd))
-
- TEST_SCPI_INPUT("*CLS\r\n");
- TEST_SCPI_INPUT("*RST\r\n");
- TEST_SCPI_INPUT("MEAS:volt:DC? 12,50;*OPC\r\n");
- TEST_SCPI_INPUT("*IDN?\r\n");
- TEST_SCPI_INPUT("SYST:VERS?");
- TEST_SCPI_INPUT("\r\n*ID");
- TEST_SCPI_INPUT("N?");
- TEST_SCPI_INPUT(""); // emulate command timeout
-
- TEST_SCPI_INPUT("*ESE\r\n"); // cause error -109, missing parameter
- TEST_SCPI_INPUT("*ESE 0x20\r\n");
-
- TEST_SCPI_INPUT("*SRE 0xFF\r\n");
+ listenfd = createServer(5025);
- TEST_SCPI_INPUT("IDN?\r\n"); // cause error -113, undefined header
+ while(1) {
+ int clifd;
+ struct sockaddr_in cliaddr;
+ socklen_t clilen;
- TEST_SCPI_INPUT("SYST:ERR?\r\n");
- TEST_SCPI_INPUT("SYST:ERR?\r\n");
- TEST_SCPI_INPUT("*STB?\r\n");
- TEST_SCPI_INPUT("*ESR?\r\n");
- TEST_SCPI_INPUT("*STB?\r\n");
+ clilen = sizeof(cliaddr);
+ clifd = accept(listenfd, (struct sockaddr *)&cliaddr, &clilen);
+
+ if (clifd < 0) continue;
- TEST_SCPI_INPUT("meas:volt:dc? 0.01 V, Default\r\n");
- TEST_SCPI_INPUT("meas:volt:dc?\r\n");
- TEST_SCPI_INPUT("meas:volt:dc? def, 0.00001\r\n");
- TEST_SCPI_INPUT("meas:volt:dc? 0.00001\r\n");
+ printf("Connection established %s\r\n", inet_ntoa(cliaddr.sin_addr));
+ scpi_context.user_context = &clifd;
- //printf("%.*s %s\r\n", 3, "asdadasdasdasdas", "b");
- // interactive demo
- //char smbuffer[10];
- //while (1) {
- // fgets(smbuffer, 10, stdin);
- // SCPI_Input(&scpi_context, smbuffer, strlen(smbuffer));
- //}
+ while(1) {
+ rc = waitServer(clifd);
+ if (rc < 0) { // failed
+ perror(" recv() failed");
+ break;
+ }
+ if (rc == 0) { // timeout
+ SCPI_Input(&scpi_context, NULL, 0);
+ }
+ if (rc > 0) { // something to read
+ rc = recv(clifd, smbuffer, sizeof(smbuffer), 0);
+ if (rc < 0) {
+ if (errno != EWOULDBLOCK) {
+ perror(" recv() failed");
+ break;
+ }
+ } else if (rc == 0) {
+ printf("Connection closed\r\n");
+ break;
+ } else {
+ SCPI_Input(&scpi_context, smbuffer, rc);
+ }
+ }
+ }
-
+ close(clifd);
+ }
+
return (EXIT_SUCCESS);
}
--
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