From 47eacf2c3a4de7064b25d7b0444248f1c854bb93 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=9F=B3=E9=80=A2=E9=92=8A?= <shifengzhao@mesalab.cn>
Date: Wed, 7 Aug 2019 20:36:54 +0800
Subject: [PATCH] kni tap mode 1

---
 entry/src/tap_mode.cpp | 90 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 83 insertions(+), 7 deletions(-)

diff --git a/entry/src/tap_mode.cpp b/entry/src/tap_mode.cpp
index 52d8f6b..51f910b 100644
--- a/entry/src/tap_mode.cpp
+++ b/entry/src/tap_mode.cpp
@@ -1,18 +1,94 @@
-
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <linux/if_tun.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "kni_utils.h" 
+#include "MESA_prof_load.h"
 struct tap_mode_handle{
     int fd;
     void *logger;
 };
 
 struct tap_mode_handle* tap_mode_init(void *logger){
+    struct tap_mode_handle * tap_handle = (struct tap_mode_handle*)malloc(sizeof(struct tap_mode_handle));
 
-}
+    char tap_path[1024] = {0};
+    char tap_name[IFNAMSIZ] = {0};
+    struct ifreq ifr;
+    int err = 0;
 
+    MESA_load_profile_string_def(".kniconf/kni.conf","tap",(char*)"tap_path",tap_path,1024,"/dev/net/tap");	
+	MESA_load_profile_string_def(".kniconf/kni.conf","tap",(char*)"tap_name",tap_name,1024,"/dev/net/tap");	
 
-int tap_mode_write(struct tap_mode_handle *handle, char *buff, uint16_t buff_len){
-
-}
-
-int tap_mode_read(struct tap_mode_handle *handle, char *buff, uint16_t buff_len){
+    memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_ONE_QUEUE;
     
+    if(*tap_name)
+    {
+        strncpy(ifr.ifr_name, tap_name, IFNAMSIZ);
+    }
+
+    if((tap_handle ->fd = open(tap_path, O_RDWR)) < 0)
+    {
+        KNI_LOG_ERROR(logger, "tap_mode_init():open error,errno is:%d,%s",errno,strerror(errno));
+        free(tap_handle);
+        return NULL;
+    }
+    err = ioctl(tap_handle ->fd, TUNSETIFF, (void *)&ifr);
+	if (err) 
+	{
+		KNI_LOG_ERROR(logger ,"tap_mode_init():ioctl error,errno is:%d,%s",errno,strerror(errno));
+		close(tap_handle ->fd);
+        free(tap_handle);
+		return NULL;
+	}
+    tap_handle -> logger = logger;
+    retrun tap_handle;
+}
+
+
+
+/*
+*   > 0 : send data length
+*   = 0 : send null
+*   = -1 : error
+*/
+int tap_mode_write(struct tap_mode_handle *handle, char *buff, uint16_t buff_len){
+    int sendlen=0;
+
+	sendlen = write(handle -> fd, buff, buff_len);
+	if(sendlen < 0)
+	{
+        KNI_LOG_ERROR(handle -> logger, "tap_mode_write() error %d, %s",errno,strerror(errno));
+ 		return -1;
+	}
+	else
+	{
+		return sendlen;
+	}
+
+	return 0;
+}
+
+/*
+*   > 0 : read data length
+*   = 0 : read null
+*   = -1 : error
+*/
+int tap_mode_read(struct tap_mode_handle *handle, char *buff, uint16_t buff_len){
+    int recv_len=0;
+
+	recv_len = read(handle -> fd, buff, buff_len);
+	if(recv_len <0)
+	{
+        KNI_LOG_ERROR(handle -> logger, "tap_mode_read() error %d, %s",errno,strerror(errno));
+ 		return -1;
+	}
+	else
+	{
+		return recv_len;
+	}
+
+	return 0;
 }
\ No newline at end of file