trafgen: fix -t 0 option to use sendto

Currently, using -t 0 option calls shaper_set_delay with 0 sec and 0 ns,
which results in sh->type to be SHAPER_NONE. This in turn causes trafgen
to use TX_RING.

Expected behavior, from "man trafgen":

    If this option is given, then instead of packet(7)'s TX_RING
    interface, trafgen will use sendto(2) I/O for network packets, even
    if the argument is 0.

This patch forces sh->type to be set to SHAPER_DELAY even if
the delay is 0. shaper_delay already handles the case where
sh->type is SHAPER_DELAY and the delay is 0.

Fixes #208

Signed-off-by: Quentin Chateau <quentin.chateau@gmail.com>
[tklauser: adjusted commit message to include change description]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 0 insertions, 5 deletions

diff --git a/trafgen.c b/trafgen.c
index e628646..78be711 100644
--- a/trafgen.c
+++ b/trafgen.c
@@ -567,11 +567,6 @@ static void shaper_init(struct shaper *sh)
 
 static void shaper_set_delay(struct shaper *sh, time_t sec, long int ns)
 {
-	if (!(sec | ns)) {
-		sh->type = SHAPER_NONE;
-		return;
-	}
-
 	sh->type = SHAPER_DELAY;
 	sh->delay.tv_sec = sec;
 	sh->delay.tv_nsec = ns;