long dropfrom;
long dropto;
double reorder;
-long reorder_dist;
+long reorder_dist = 10;
double dropin;
double dropout;
long total_out;
long total_in;
+FILE *reference;
char *reorder_data;
size_t reorder_len;
int reorder_countdown;
+#if UTCP_DEBUG
void debug(const char *format, ...) {
struct timeval now;
gettimeofday(&now, NULL);
vfprintf(stderr, format, ap);
va_end(ap);
}
+#else
+#define debug(...)
+#endif
ssize_t do_recv(struct utcp_connection *c, const void *data, size_t len) {
if(!data || !len) {
}
return -1;
}
+ if(reference) {
+ char buf[len];
+ if(fread(buf, len, 1, reference) != 1) {
+ debug("Error reading reference\n");
+ abort();
+ }
+ if(memcmp(buf, data, len)) {
+ debug("Received data differs from reference\n");
+ abort();
+ }
+ }
return write(1, data, len);
}
int s = *(int *)utcp->priv;
outpktno++;
if(outpktno >= dropfrom && outpktno < dropto) {
- if(drand48() < dropout)
+ if(drand48() < dropout) {
+ debug("Dropped outgoing packet\n");
return len;
+ }
if(!reorder_data && drand48() < reorder) {
reorder_data = malloc(len);
+ if(!reorder_data) {
+ debug("Out of memory\n");
+ return len;
+ }
reorder_len = len;
memcpy(reorder_data, data, len);
reorder_countdown = 1 + drand48() * reorder_dist;
bool server = argc == 2;
bool connected = false;
+ uint32_t flags = UTCP_TCP;
+ size_t read_size = 102400;
+
+ if(getenv("DROPIN")) dropin = atof(getenv("DROPIN"));
+ if(getenv("DROPOUT")) dropout = atof(getenv("DROPOUT"));
+ if(getenv("DROPFROM")) dropfrom = atoi(getenv("DROPFROM"));
+ if(getenv("DROPTO")) dropto = atoi(getenv("DROPTO"));
+ if(getenv("REORDER")) reorder = atof(getenv("REORDER"));
+ if(getenv("REORDER_DIST")) reorder_dist = atoi(getenv("REORDER_DIST"));
+ if(getenv("FLAGS")) flags = atoi(getenv("FLAGS"));
+ if(getenv("READ_SIZE")) read_size = atoi(getenv("READ_SIZE"));
+
+ char *reference_filename = getenv("REFERENCE");
+ if(reference_filename)
+ reference = fopen(reference_filename, "r");
- dropin = atof(getenv("DROPIN") ?: "0");
- dropout = atof(getenv("DROPOUT") ?: "0");
- dropfrom = atoi(getenv("DROPFROM") ?: "0");
- dropto = atoi(getenv("DROPTO") ?: "0");
- reorder = atof(getenv("REORDER") ?: "0");
- reorder_dist = atoi(getenv("REORDER_DIST") ?: "10");
+ if(dropto < dropfrom)
+ dropto = 1 << 30;
struct addrinfo *ai;
struct addrinfo hint = {
utcp_set_user_timeout(u, 10);
if(!server)
- c = utcp_connect(u, 1, do_recv, NULL);
+ c = utcp_connect_ex(u, 1, do_recv, NULL, flags);
struct pollfd fds[2] = {
{.fd = 0, .events = POLLIN | POLLERR | POLLHUP},
size_t max = c ? utcp_get_sndbuf_free(c) : 0;
if(max > sizeof buf)
max = sizeof buf;
+ if(max > read_size)
+ max = read_size;
int timeout_ms = timeout.tv_sec * 1000 + timeout.tv_usec / 1000 + 1;
inpktno++;
if(inpktno >= dropto || inpktno < dropfrom || drand48() >= dropin) {
total_in += len;
- utcp_recv(u, buf, len);
+ if(utcp_recv(u, buf, len) == -1)
+ debug("Error receiving UTCP packet: %s\n", strerror(errno));
+ } else {
+ debug("Dropped incoming packet\n");
}
}