增加免费ARP发送功能

- 原实现没有免费ARP发送功能，导致驱动重启后，网段内交换机（路由器？）找不到MAC地址对应的端口位置。现启动时先发送免费ARP，避免这一现象。

1 files changed, 15 insertions, 1 deletions

diff --git a/app/src/marsio.c b/app/src/marsio.c
index a72eee8..d4a1692 100644
--- a/app/src/marsio.c
+++ b/app/src/marsio.c
@@ -17,6 +17,7 @@
 #include <signal.h>
 #include <cJSON.h>
 #include <libgen.h>
+#include <arp.h>
 
 #define MR_LIB_MAX_EAL_ARGC			128
 
@@ -45,6 +46,10 @@ struct mr_instance * _current_instance = NULL;
 #define MRAPP_DEFAULT_NEIGH_ARP_SEND_INTERVAL           1
 #endif
 
+#ifndef MRAPP_DEFAULT_NEIGH_GRATUITOUS_ARP_SEND
+#define MRAPP_DEFAULT_NEIGH_GRATUITOUS_ARP_SEND         3
+#endif
+
 /* 写入Command参数 */
 static void __write_arg(char * eal_argv[], unsigned int * eal_argc,
     unsigned int max_argc, const char * value)
@@ -356,7 +361,9 @@ static int mrapp_neigh_init(struct mr_instance * instance)
         &neigh_timeout, MRAPP_DEFAULT_NEIGH_TABLE_TIMEOUT);
     MESA_load_profile_uint_def(instance->g_cfgfile_path, "neigh", "arp_send_interval",
         &arp_send_interval, MRAPP_DEFAULT_NEIGH_ARP_SEND_INTERVAL);
-
+    MESA_load_profile_uint_def(instance->g_cfgfile_path, "neigh", "gratuitous_arp_send",
+        &instance->nr_gratuitous_arp_send, MRAPP_DEFAULT_NEIGH_GRATUITOUS_ARP_SEND);
+    
     /* 邻居子系统初始化 */
     if (neighbour_mamanger_init(instance->neigh, instance->appsym,
         neigh_max_entries, neigh_timeout, arp_send_interval) != RT_SUCCESS)
@@ -468,6 +475,7 @@ err:
 */
 static int mrapp_neigh_device_init(struct mr_instance * instance, struct mr_vdev * vdev)
 {
+    /* 读静态邻居表项 */
     struct mr_static_neigh_entry * __neigh_entry_iter;
     TAILQ_FOREACH(__neigh_entry_iter, &instance->static_neigh_list, next)
     {
@@ -491,6 +499,12 @@ static int mrapp_neigh_device_init(struct mr_instance * instance, struct mr_vdev
             __neigh_entry_iter->str_ether_addr, __neigh_entry_iter->devsym);
     }
 
+    /* 设备开启了发送队列后，发免费ARP报文 */
+    for (int i = 0; vdev->nr_txstream > 0 && i < instance->nr_gratuitous_arp_send; i++)
+    {
+        arp_request_send(vdev->vdi, 0, vdev->vdi->vdev->in_addr);
+    }
+
     return RT_SUCCESS;
 }