int
main(int argc, char *argv[])
{
web100_agent* agent;
web100_connection* conn;
web100_group* group;
web100_var* var;
char buf[256];
int cid;
char** arg;
argv0 = argv[0];
if (argc < 3) {
usage();
exit(EXIT_FAILURE);
}
cid = atoi(argv[1]);
if ((agent = web100_attach(WEB100_AGENT_TYPE_LOCAL, NULL)) == NULL) {
web100_perror("web100_attach");
exit(EXIT_FAILURE);
}
if ((conn = web100_connection_lookup(agent, cid)) == NULL) {
web100_perror("web100_connection_lookup");
exit(EXIT_FAILURE);
}
for (arg=&argv[2]; *arg; arg++) {
if ((web100_agent_find_var_and_group(agent, *arg, &group, &var)) != WEB100_ERR_SUCCESS) {
web100_perror("web100_agent_find_var_and_group");
exit(EXIT_FAILURE);
}
if ((web100_raw_read(var, conn, buf)) != WEB100_ERR_SUCCESS) {
web100_perror("web100_raw_read");
exit(EXIT_FAILURE);
}
printf("%-20s: %s\n", *arg, web100_value_to_text(web100_get_var_type(var), buf));
}
web100_detach(agent);
return 0;
}
/**
* Set Cwnd limit
* @param connarg tcp_stat_connection pointer
* @param group_arg tcp_stat group pointer
* @param agentarg tcp_stat agent pointer
* */
void setCwndlimit(tcp_stat_connection connarg, tcp_stat_group* grouparg,
tcp_stat_agent* agentarg, Options* optionsarg) {
#if USE_WEB100
web100_var *LimRwin, *yar;
#elif USE_WEB10G
struct estats_val yar;
#endif
u_int32_t limrwin_val;
if (optionsarg->limit > 0) {
log_print(1, "Setting Cwnd limit - ");
#if USE_WEB100
if (connarg != NULL) {
log_println(1,
"Got web100 connection pointer for recvsfd socket\n");
char yuff[32];
web100_agent_find_var_and_group(agentarg, "CurMSS", &grouparg,
&yar);
web100_raw_read(yar, connarg, yuff);
log_println(1, "MSS = %s, multiplication factor = %d",
web100_value_to_text(web100_get_var_type(yar), yuff),
optionsarg->limit);
limrwin_val = optionsarg->limit
* (atoi(
web100_value_to_text(web100_get_var_type(yar),
yuff)));
web100_agent_find_var_and_group(agentarg, "LimRwin", &grouparg,
&LimRwin);
log_print(1, "now write %d to limit the Receive window",
limrwin_val);
web100_raw_write(LimRwin, connarg, &limrwin_val);
#elif USE_WEB10G
if (connarg != -1) {
log_println(1,
"Got web10g connection for recvsfd socket\n");
web10g_get_val(agentarg, connarg, "CurMSS", &yar);
log_println(1, "MSS = %s, multiplication factor = %d",
yar.uv32, optionsarg->limit);
limrwin_val = optionsarg->limit * yar.uv32;
log_print(1, "now write %d to limit the Receive window", limrwin_val);
estats_write_var("LimRwin", limrwin_val, connarg, agentarg);
#endif
log_println(1, " --- Done");
}
}
}
/**
* Check if receiver is clogged and use decision to temporarily
* stop sending packets.
* @param nextseqtosend integer indicating the Next Sequence Number To Be Sent
* @param lastunackedseq integer indicating the oldest un-acked sequence number
* @return integer indicating whether buffer is clogged
* */
int is_buffer_clogged(int nextseqtosend, int lastunackedseq) {
int recclog = 0;
if ((RECLTH << 2) < (nextseqtosend - lastunackedseq - 1)) {
recclog = 1;
}
return recclog;
}
