Cyril Wallois wrote: > Hello Jan , > >> Could you verify that sizeof(struct ipv4_cmd) gives the same results in > kernel and user space: > > In the kernel space the size is 56, against in the user space the size is > 52. > > Where should I add the definition of the structure, in rtping.c ? >
Please try this patch:
diff --git a/stack/include/ipv4_chrdev.h b/stack/include/ipv4_chrdev.h
index a96a8ad..fc1099b 100644
--- a/stack/include/ipv4_chrdev.h
+++ b/stack/include/ipv4_chrdev.h
@@ -67,10 +67,12 @@ struct ipv4_cmd {
__u32 ip_addr;
__u16 id;
__u16 sequence;
- size_t msg_size;
- unsigned int timeout;
+ __u32 msg_size;
+ __u32 timeout;
__s64 rtt;
} ping;
+
+ unsigned char padding[64];
} args;
};
diff --git a/tools/rtping.c b/tools/rtping.c
index 2178928..17309db 100644
--- a/tools/rtping.c
+++ b/tools/rtping.c
@@ -168,7 +168,7 @@ int main(int argc, char *argv[])
exit(1);
}
- printf("Real-time PING %s %zd(%zd) bytes of data.\n",
+ printf("Real-time PING %s %d(%d) bytes of data.\n",
inet_ntoa(addr), cmd.args.ping.msg_size,
cmd.args.ping.msg_size + 28);
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