trafgen: let the kernel check min/max transm. unit boundaries

Let AF_PACKET do this job to fail in case boundaries are too small or
too large. I found it quite useful for testing the kernel.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

1 files changed, 2 insertions, 10 deletions

diff --git a/trafgen.c b/trafgen.c
index 9ecde20..f88db18 100644
--- a/trafgen.c
+++ b/trafgen.c
@@ -798,9 +798,9 @@ static void __set_state_cd(unsigned int cpu, unsigned long p, sig_atomic_t s)
 
 static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
 {
-	unsigned int i;
 	unsigned long plen_total, orig = ctx->num;
-	size_t mtu, total_len = 0;
+	size_t total_len = 0;
+	unsigned int i;
 
 	bug_on(plen != dlen);
 
@@ -822,14 +822,6 @@ static void xmit_packet_precheck(struct ctx *ctx, unsigned int cpu)
 		__set_state(cpu, CPU_STATS_STATE_RES);
 		return;
 	}
-
-	for (mtu = device_mtu(ctx->device), i = 0; i < plen; ++i) {
-		if (packets[i].len > mtu + PKT_MIN_LEN)
-			panic("Device MTU < than packet%d's size!\n", i);
-		if (packets[i].len <= PKT_MIN_LEN)
-			panic("Packet%d's size must be > %d bytes!\n",
-					i, PKT_MIN_LEN);
-	}
 }
 
 static void main_loop(struct ctx *ctx, char *confname, bool slow,