Allow variable packet loss rates to be set in the test program.

diff --git a/test.c b/test.c
index 10ebc9a63c441571fee10852cc94e58c8b8cd183..cda5f176d80e74407b8d3598e4336a8292d25aa3 100644 (file)
--- a/test.c
+++ b/test.c
@@ -16,6 +16,8 @@
 struct utcp_connection *c;
 int dir = 3;
 bool running = true;
+double dropin;
+double dropout;
 
 int do_recv(struct utcp_connection *c, const void *data, size_t len) {
        if(!data || !len) {
@@ -38,11 +40,15 @@ void do_accept(struct utcp_connection *nc, uint16_t port) {
 
 int do_send(struct utcp *utcp, const void *data, size_t len) {
        int s = *(int *)utcp->priv;
-       return send(s, data, len, MSG_DONTWAIT);
+       if(drand48() >= dropout)
+               return send(s, data, len, MSG_DONTWAIT);
+       else
+               return 0;
 }
 
 int main(int argc, char *argv[]) {
        srand(time(NULL));
+       srand48(time(NULL));
 
        if(argc < 2 || argc > 3)
                return 1;
@@ -50,6 +56,9 @@ int main(int argc, char *argv[]) {
        bool server = argc == 2;
        bool connected = false;
 
+       dropin = atof(getenv("DROPIN") ?: "0");
+       dropout = atof(getenv("DROPOUT") ?: "0");
+
        struct addrinfo *ai;
        struct addrinfo hint = {
                .ai_flags = server ? AI_PASSIVE : 0,
@@ -118,7 +127,8 @@ int main(int argc, char *argv[]) {
                        if(!connected)
                                if(!connect(s, (struct sockaddr *)&ss, sl))
                                        connected = true;
-                       utcp_recv(u, buf, len);
+                       if(drand48() >= dropin)
+                               utcp_recv(u, buf, len);
                }
 
                timeout = utcp_timeout(u);