working on icmp ping reply

1 files changed, 20 insertions, 0 deletions

diff --git a/net/ipv4.c b/net/ipv4.c
new file mode 100644
index 0000000..aa8502e
--- /dev/null
+++ b/net/ipv4.c
@@ -0,0 +1,20 @@
+#include "inet.h"
+#include "ipv4.h"
+#include "eth.h"
+#include "log.h"
+#include "icmp.h"
+
+bool ipv4_incoming(struct netdev *dev,struct eth_hdr *hdr)
+{
+    struct ipv4_hdr *ipv4=hdr->payload;
+    klog("ipv4 incoming with checksum: 0x%04X",ntohs(ipv4->csum));
+    ipv4->csum=0;
+    klog("expected checksum: 0x%04X",checksum(ipv4,ntohs(ipv4->len)));
+    klog("ipv4 header len=%d",ipv4->ihl);
+    if(ipv4->proto==IPV4_P_ICMP)
+    {
+	icmp_incoming(dev,((uint32_t *)ipv4)+ipv4->ihl,ntohs(ipv4->len)-ipv4->ihl*4);
+    }
+
+    return true;
+}