diff --git a/src/meas_lat.c b/src/meas_lat.c
index 4f15215..a97a637 100644
--- a/src/meas_lat.c
+++ b/src/meas_lat.c
@@ -9,28 +9,133 @@
 #include "socks5.h"
 #include "utils.h"
 #include "measure.h"
+#include "url.h"
 
 struct measlat_ctx {
   struct measure_conf mc;
-  int verbose;
+  struct sockaddr_in addr;
+  socklen_t addrlen;
+  int verbose, is_timer_started, is_from_needed;
   char *host, *port, *transport;
 };
 
-int on_udp_err(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
+void register_timer(struct evt_core_ctx* evts, struct timespec* next_tick) {
+  struct timespec now;
+  struct itimerspec timer_config;
+  char url[1024];
+  struct evt_core_cat cat = {0};
+  struct evt_core_fdinfo fdinfo = {0};
+  fdinfo.cat = &cat;
+  fdinfo.url = url;
+
+  struct evt_core_cat* ucat = evt_core_get_from_cat (evts, "tcp-read");
+  if (ucat == NULL) {
+    fprintf(stderr, "Category udp-read not found\n");
+    exit(EXIT_FAILURE);
+  }
+  struct measlat_ctx* mctx = ucat->app_ctx;
+  mctx->is_timer_started = 1;
+
+  if (clock_gettime(CLOCK_REALTIME, &now) == -1) {
+    perror("clock_gettime");
+    exit(EXIT_FAILURE);
+  }
+  uint64_t micro_sec = mctx->mc.interval;
+  timer_config.it_value.tv_sec = next_tick == NULL ? now.tv_sec + 1 : next_tick->tv_sec;
+  timer_config.it_value.tv_nsec = next_tick == NULL ? now.tv_nsec : next_tick->tv_nsec;
+  timer_config.it_interval.tv_sec = micro_sec / 1000;
+  timer_config.it_interval.tv_nsec = micro_sec % 1000 * 1000000;
+
+  printf("timer_config: sec=%ld nsec=%ld \n", (uint64_t) timer_config.it_value.tv_sec, (uint64_t) timer_config.it_value.tv_nsec);
+
+  fdinfo.fd = timerfd_create(CLOCK_REALTIME, 0);
+  if (fdinfo.fd == -1) {
+    perror("Unable to timerfd_create");
+    exit(EXIT_FAILURE);
+  }
+  if (timerfd_settime (fdinfo.fd, TFD_TIMER_ABSTIME, &timer_config, NULL) == -1) {
+    perror("Unable to timerfd_time");
+    exit(EXIT_FAILURE);
+  }
+  fdinfo.cat->name = "timer";
+  sprintf(fdinfo.url, "timer:%ld:%ld", mctx->mc.interval, mctx->mc.max_measure);
+  evt_core_add_fd (evts, &fdinfo);
+  printf("--- Timer registered\n");
+}
+
+int on_receive_measure_packet_err(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
   return 1;
 }
 
-int on_udp(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
-  ssize_t res;
+int on_receive_measure_packet(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
+  ssize_t nread;
   struct measlat_ctx* mctx = fdinfo->cat->app_ctx;
-  res = read(fdinfo->fd, mctx->mc.payload, mctx->mc.payload_size);
-  if (res == -1 && errno == EAGAIN) return 1;
 
-  measure_parse (res, &mctx->mc);
+  if (mctx->is_from_needed) nread = recvfrom(fdinfo->fd, mctx->mc.payload, mctx->mc.payload_size, MSG_TRUNC, (struct sockaddr*)&mctx->addr, &mctx->addrlen);
+  else nread = recv(fdinfo->fd, mctx->mc.payload, mctx->mc.payload_size, MSG_TRUNC);
+
+  if (nread == -1 && errno == EAGAIN) return 1;
+  // @FIXME logic is wrong for TCP here but would lead (hopefully) to a crash
+
+  // First we parse the packet and exit if needed
+  measure_parse (nread, &mctx->mc);
+
+  // Old behaviour where we work in a RTT way and send back the packet
+  if (measure_need_reply (&mctx->mc)) {
+    ssize_t nwritten;
+    if (mctx->is_from_needed) nwritten = sendto(fdinfo->fd, mctx->mc.payload, nread, 0, (struct sockaddr*)&mctx->addr, mctx->addrlen);
+    else nwritten = send(fdinfo->fd, mctx->mc.payload, nread, 0);
+
+    // @FIXME don't support EAGAIN on write. Could be intended, you don't think so?
+    if (nwritten != nread) {
+      fprintf(stderr, "Didn't write the same number of bytes as read. nread=%ld, nwritten=%ld\n", nread, nwritten);
+      perror("write errno");
+      exit(EXIT_FAILURE);
+    }
+    return 0;
+  }
+
+  // Used to start sending from the server in sync with client
+  if (!mctx->is_timer_started) {
+    struct timespec next_tick = {0};
+    measure_next_tick(&mctx->mc, &next_tick);
+    register_timer (ctx, &next_tick);
+  }
 
   return 0;
 }
 
+
+int on_tcp_co(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
+  int conn_sock1, conn_sock2;
+  struct sockaddr_in addr;
+  socklen_t in_len;
+  char url[1024], port[6];
+  struct evt_core_cat local_cat = {0};
+  struct evt_core_fdinfo to_fdinfo = {0};
+  to_fdinfo.cat = &local_cat;
+  to_fdinfo.url = url;
+
+  in_len = sizeof(addr);
+  conn_sock1 = accept(fdinfo->fd, (struct sockaddr*)&addr, &in_len);
+
+  if (conn_sock1 == -1 && errno == EAGAIN) return 1;
+  if (conn_sock1 == -1) goto co_error;
+
+  url_get_port(port, fdinfo->url);
+
+  to_fdinfo.fd = conn_sock1;
+  to_fdinfo.cat->name = "tcp-read";
+  sprintf(to_fdinfo.url, "tcp:read:127.0.0.1:%s", port);
+  evt_core_add_fd (ctx, &to_fdinfo);
+
+  return 0;
+
+co_error:
+  perror("Failed to handle new connection");
+  exit(EXIT_FAILURE);
+}
+
 int on_timer(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
   ssize_t s;
   uint64_t ticks = 0;
@@ -46,15 +151,8 @@ int on_timer(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
   if (ticks != 1) {
     fprintf(stderr, "Has ticked %lu times, expected 1 time. This is a bug\n", ticks);
   }
-  mctx->mc.counter++;
-
-  struct measure_packet* head = (struct measure_packet*)mctx->mc.payload;
-  head->counter = mctx->mc.counter;
-  if (clock_gettime(CLOCK_MONOTONIC, &head->emit_time) == -1) {
-    perror("clock_gettime error");
-    exit(EXIT_FAILURE);
-  }
 
+  struct measure_packet* head = measure_generate(&mctx->mc);
 
   struct evt_core_fdinfo* tgtinfo = evt_core_get_first_from_cat (ctx, "udp-read");
   if (tgtinfo == NULL) tgtinfo = evt_core_get_first_from_cat (ctx, "tcp-read");
@@ -62,56 +160,17 @@ int on_timer(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
     printf("No connection yet\n");
     return 1;
   }
-  s = send(tgtinfo->fd, mctx->mc.payload, mctx->mc.payload_size, 0);
+  if (mctx->is_from_needed) s = sendto(tgtinfo->fd, mctx->mc.payload, mctx->mc.payload_size, 0, (struct sockaddr*)&mctx->addr, mctx->addrlen);
+  else s = send(tgtinfo->fd, mctx->mc.payload, mctx->mc.payload_size, 0);
+
   if (s < 0) {
     perror("Send error");
     //exit(EXIT_FAILURE);
   }
+
   return 0;
 }
 
-
-void register_timer(struct evt_core_ctx* evts) {
-  struct timespec now;
-  struct itimerspec timer_config;
-  char url[1024];
-  struct evt_core_cat cat = {0};
-  struct evt_core_fdinfo fdinfo = {0};
-  fdinfo.cat = &cat;
-  fdinfo.url = url;
-
-  struct evt_core_cat* ucat = evt_core_get_from_cat (evts, "tcp-read");
-  if (ucat == NULL) {
-    fprintf(stderr, "Category udp-read not found\n");
-    exit(EXIT_FAILURE);
-  }
-  struct measlat_ctx* mctx = ucat->app_ctx;
-
-  if (clock_gettime(CLOCK_REALTIME, &now) == -1) {
-    perror("clock_gettime");
-    exit(EXIT_FAILURE);
-  }
-  uint64_t micro_sec = mctx->mc.interval;
-  timer_config.it_value.tv_sec = now.tv_sec + 1;
-  timer_config.it_value.tv_nsec = now.tv_nsec;
-  timer_config.it_interval.tv_sec = micro_sec / 1000;
-  timer_config.it_interval.tv_nsec = micro_sec % 1000 * 1000000;
-
-  fdinfo.fd = timerfd_create(CLOCK_REALTIME, 0);
-  if (fdinfo.fd == -1) {
-    perror("Unable to timerfd_create");
-    exit(EXIT_FAILURE);
-  }
-  if (timerfd_settime (fdinfo.fd, TFD_TIMER_ABSTIME, &timer_config, NULL) == -1) {
-    perror("Unable to timerfd_time");
-    exit(EXIT_FAILURE);
-  }
-  fdinfo.cat->name = "timer";
-  sprintf(fdinfo.url, "timer:%ld:%ld", mctx->mc.interval, mctx->mc.max_measure);
-  evt_core_add_fd (evts, &fdinfo);
-  printf("--- Timer registered\n");
-}
-
 int on_socks5_success_measlat(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
   char url[1024];
   struct evt_core_cat cat = {0};
@@ -134,11 +193,11 @@ int on_socks5_success_measlat(struct evt_core_ctx* ctx, struct evt_core_fdinfo*
   evt_core_add_fd (ctx, &fdinfo_n);
   printf("--- Tor socket registered\n");
 
-  register_timer(ctx);
+  register_timer(ctx, NULL);
   return 1;
 }
 
-void spawn_tor_socket(struct evt_core_ctx* evts) {
+void spawn_tor_client(struct evt_core_ctx* evts) {
   struct evt_core_cat* ucat = evt_core_get_from_cat (evts, "tcp-read");
   if (ucat == NULL) {
     fprintf(stderr, "Category udp-read not found\n");
@@ -147,11 +206,12 @@ void spawn_tor_socket(struct evt_core_ctx* evts) {
   struct measlat_ctx* mctx = ucat->app_ctx;
 
   socks5_create_dns_client (evts, "127.0.0.1", "9050", mctx->host, atoi(mctx->port));
+  printf("--- Tor client SOCKS started\n");
 }
 
 int on_socks5_failed_measlat(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
   evt_core_rm_fd (ctx, fdinfo->fd);
-  spawn_tor_socket(ctx);
+  spawn_tor_client(ctx);
 
   return 1;
 }
@@ -166,18 +226,24 @@ void register_categories(struct evt_core_ctx* evts, struct measlat_ctx* mctx) {
   template.flags = EPOLLIN | EPOLLET;
   evt_core_add_cat(evts, &template);
 
-  template.cb = on_udp; // intended but not elegant
-  template.err_cb = on_udp_err; // intended but not elegant
+  template.cb = on_receive_measure_packet; // intended but not elegant
+  template.err_cb = on_receive_measure_packet_err; // intended but not elegant
   template.name = "tcp-read";
   template.flags = EPOLLIN | EPOLLET;
   evt_core_add_cat(evts, &template);
 
-  template.cb = on_udp;
-  template.err_cb = on_udp_err;
+  template.cb = on_receive_measure_packet;
+  template.err_cb = on_receive_measure_packet_err;
   template.name = "udp-read";
   template.flags = EPOLLIN | EPOLLET;
   evt_core_add_cat(evts, &template);
 
+  template.cb = on_tcp_co;
+  template.err_cb = NULL;
+  template.name = "tcp-co";
+  template.flags = EPOLLIN | EPOLLET;
+  evt_core_add_cat(evts, &template);
+
   template.cb = on_socks5_success_measlat;
   template.err_cb = on_socks5_failed_measlat;
   template.name = "socks5-success";
@@ -195,7 +261,7 @@ void register_categories(struct evt_core_ctx* evts, struct measlat_ctx* mctx) {
 
 }
 
-void spawn_udp_socket(struct evt_core_ctx* evts) {
+void spawn_udp_client(struct evt_core_ctx* evts) {
   struct evt_core_cat* ucat = evt_core_get_from_cat (evts, "udp-read");
   if (ucat == NULL) {
     fprintf(stderr, "Category udp-read not found\n");
@@ -216,9 +282,52 @@ void spawn_udp_socket(struct evt_core_ctx* evts) {
   fdinfo.free_other = NULL;
   sprintf(fdinfo.url, "udp:read:%s:%s", mctx->host, mctx->port);
   evt_core_add_fd (evts, &fdinfo);
-  printf("--- UDP socket registered\n");
+  printf("--- UDP client registered\n");
 
-  register_timer(evts);
+  register_timer(evts, NULL);
+}
+
+void spawn_udp_server(struct evt_core_ctx* evts) {
+  struct evt_core_cat* ucat = evt_core_get_from_cat (evts, "udp-read");
+  if (ucat == NULL) {
+    fprintf(stderr, "Category udp-read not found\n");
+    exit(EXIT_FAILURE);
+  }
+  struct measlat_ctx* mctx = ucat->app_ctx;
+  int udp_sock = create_udp_server (mctx->host, mctx->port);
+
+  char url[1024];
+  struct evt_core_cat cat = {0};
+  struct evt_core_fdinfo fdinfo = {0};
+  fdinfo.cat = &cat;
+  fdinfo.url = url;
+
+  fdinfo.fd = udp_sock;
+  sprintf(url, "udp:rw:127.0.0.1:%s", mctx->port);
+  fdinfo.cat->name = "udp-read";
+  evt_core_add_fd(evts, &fdinfo);
+  printf("--- UDP server is listening\n");
+}
+
+void spawn_tor_server(struct evt_core_ctx* evts) {
+  uint16_t ports[] = {7500};
+  char buffer[1024];
+  int tcp_serv_sock, err;
+
+  sprintf(buffer, "%d", ports[0]);
+  tcp_serv_sock = create_tcp_server ("0.0.0.0", buffer);
+  err = listen(tcp_serv_sock, SOMAXCONN);
+
+  struct evt_core_cat cat = {0};
+  struct evt_core_fdinfo fdinfo = {0};
+  fdinfo.cat = &cat;
+  fdinfo.url = buffer;
+
+  fdinfo.fd = tcp_serv_sock;
+  sprintf(buffer, "tcp:co:127.0.0.1:%d", ports[0]);
+  fdinfo.cat->name = "tcp-co";
+  evt_core_add_fd(evts, &fdinfo);
+  printf("--- TCP server is listening\n");
 }
 
 int main(int argc, char** argv) {
@@ -230,7 +339,7 @@ int main(int argc, char** argv) {
   struct evt_core_ctx evts = {0};
 
   // 1. Parse parameters
-  while ((opt = getopt(argc, argv, "vh:p:c:s:i:t:")) != -1) {
+  while ((opt = getopt(argc, argv, "vh:p:c:s:i:t:lr")) != -1) {
       switch(opt) {
       case 'v':
         mctx.verbose++;
@@ -241,6 +350,9 @@ int main(int argc, char** argv) {
       case 'p': // port
         mctx.port = optarg;
         break;
+      case 'l':
+        mctx.mc.is_server = 1;
+        break;
       case 't': // transport
         mctx.transport = optarg;
         break;
@@ -250,6 +362,8 @@ int main(int argc, char** argv) {
       case 's': // size - payload in bytes
         mctx.mc.payload_size = atoi(optarg);
         break;
+      case 'r':
+        mctx.mc.is_rtt = 1;
       case 'i': // interval - every ms
         mctx.mc.interval = atoi(optarg);
         break;
@@ -260,21 +374,27 @@ int main(int argc, char** argv) {
 
   // 2. Check and fix parameters
   measure_prepare (&mctx.mc);
+  mctx.addrlen = sizeof(mctx.addr);
   if (mctx.transport == NULL) mctx.transport = "udp";
-  if (mctx.host == NULL || mctx.port == NULL) goto usage;
-  printf("[measlat_conf] host=%s, port=%s, transport=%s, count=%ld, size=%ld, interval=%ld\n",
-          mctx.host, mctx.port, mctx.transport, mctx.mc.max_measure, mctx.mc.payload_size, mctx.mc.interval);
+  if (mctx.host == NULL) mctx.host = "127.0.0.1";
+  if (mctx.port == NULL) mctx.port = strcmp(mctx.transport, "udp") == 0 ? "9000" : "7500";
+  printf("[measlat_conf] host=%s, port=%s, listen=%d, transport=%s, count=%ld, size=%ld, interval=%ld\n",
+          mctx.host, mctx.port, mctx.mc.is_server, mctx.transport, mctx.mc.max_measure, mctx.mc.payload_size, mctx.mc.interval);
 
   // 3. Bind events
   register_categories(&evts, &mctx);
-  if (strcmp(mctx.transport, "udp") == 0) spawn_udp_socket(&evts);
-  else if (strcmp(mctx.transport, "tor") == 0) spawn_tor_socket(&evts);
+
+  if (mctx.mc.is_server && strcmp(mctx.transport, "udp") == 0) { spawn_udp_server (&evts); mctx.is_from_needed = 1; }
+  else if (mctx.mc.is_server && strcmp(mctx.transport, "tor") == 0) spawn_tor_server(&evts);
+  else if (strcmp(mctx.transport, "udp") == 0) spawn_udp_client(&evts);
+  else if (strcmp(mctx.transport, "tor") == 0) spawn_tor_client(&evts);
+  else exit(EXIT_FAILURE);
 
   // 4. Run main loop
   evt_core_loop(&evts);
 
   return 0;
 usage:
-  fprintf(stderr, "Usage: %s -h <host> -p <port> [-t <udp|tor>] [-c <count>] [-i <ms>] [-s <bytes>]\n", argv[0]);
+  fprintf(stderr, "Usage: %s -h <host> -p <port> [-l] [-t <udp|tor>] [-c <count>] [-i <ms>] [-s <bytes>]\n", argv[0]);
   exit(EXIT_FAILURE);
 }
diff --git a/src/measure.c b/src/measure.c
index 060f58d..e7d1fb2 100644
--- a/src/measure.c
+++ b/src/measure.c
@@ -1,4 +1,5 @@
 #include "measure.h"
+#define ONE_SEC 1000000000L
 
 void measure_parse(int size, struct measure_conf* mc) {
   struct timespec curr;
@@ -8,7 +9,7 @@ void measure_parse(int size, struct measure_conf* mc) {
     exit(EXIT_FAILURE);
   }
   struct measure_packet* head = (struct measure_packet*) mc->payload;
-  if (clock_gettime(CLOCK_MONOTONIC, &curr) == -1){
+  if (clock_gettime(CLOCK_REALTIME, &curr) == -1){
     perror("clock_gettime error");
     exit(EXIT_FAILURE);
   }
@@ -19,7 +20,7 @@ void measure_parse(int size, struct measure_conf* mc) {
   micro_sec = elapsed_micros (&head->emit_time, &curr);
   printf("[%s] Packet %llu latency %luµs\n", ctime_no_newline, (unsigned long long)head->counter, micro_sec);
 
-  if (!mc->inhibit_exit && head->counter >= mc->max_measure) {
+  if (!mc->is_server && head->counter >= mc->max_measure) {
     printf("Measurement done\n");
     exit(EXIT_SUCCESS);
   }
@@ -44,3 +45,49 @@ void measure_prepare(struct measure_conf* mc) {
     cursor_msg = (cursor_msg + 1) % msg_len;
   }
 }
+struct measure_packet* measure_generate(struct measure_conf* mc) {
+  struct measure_packet* head = (struct measure_packet*)mc->payload;
+  mc->counter++;
+
+  head->counter = mc->counter;
+  head->is_echo = mc->is_rtt && !mc->is_server;
+  if (clock_gettime(CLOCK_REALTIME, &head->emit_time) == -1) {
+    perror("clock_gettime error");
+    exit(EXIT_FAILURE);
+  }
+  return head;
+}
+
+uint8_t timespec_gt(struct timespec *t1, struct timespec *t2) {
+  return t1->tv_sec > t2->tv_sec || (t1->tv_sec == t2->tv_sec && t1->tv_nsec > t2->tv_nsec);
+}
+
+void measure_next_tick(struct measure_conf *mc, struct timespec *next) {
+  struct measure_packet *head = (struct measure_packet*) mc->payload;
+  struct timespec now, *sent_at = &head->emit_time;
+  mc->counter = head->counter;
+
+  if (clock_gettime(CLOCK_REALTIME, &now) == -1) {
+    perror("clock_gettime error");
+    exit(EXIT_FAILURE);
+  }
+  memcpy(next, sent_at, sizeof(struct timespec));
+
+  while(!timespec_gt (next, &now)) {
+    next->tv_nsec += mc->interval * 1000000L;
+    if (next->tv_nsec > ONE_SEC) {
+      next->tv_sec += next->tv_nsec / ONE_SEC;
+      next->tv_nsec = next->tv_nsec % ONE_SEC;
+    }
+    mc->counter++;
+  }
+  mc->counter--;
+  printf("interval: %ld\n", mc->interval);
+  printf("sent_at: sec=%ld nsec=%ld \n", (uint64_t) sent_at->tv_sec, (uint64_t) sent_at->tv_nsec);
+  printf("now: sec=%ld nsec=%ld \n", (uint64_t) now.tv_sec, (uint64_t) now.tv_nsec);
+  printf("next: sec=%ld nsec=%ld \n", (uint64_t) next->tv_sec, (uint64_t) next->tv_nsec);
+}
+
+uint8_t measure_need_reply(struct measure_conf* mc) {
+  return mc->is_server && ((struct measure_packet*)mc->payload)->is_echo;
+};
diff --git a/src/measure.h b/src/measure.h
index 51ff873..72a53f8 100644
--- a/src/measure.h
+++ b/src/measure.h
@@ -1,3 +1,4 @@
+#pragma once
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
@@ -11,13 +12,17 @@ struct measure_conf {
   uint64_t interval;
   char* payload;
   uint64_t counter;
-  uint8_t inhibit_exit;
+  uint8_t is_server, is_rtt;
 };
 
 struct measure_packet {
   uint64_t counter;
+  uint8_t is_echo;
   struct timespec emit_time;
 };
 
 void measure_parse(int size, struct measure_conf* mc);
 void measure_prepare(struct measure_conf* mc);
+struct measure_packet* measure_generate(struct measure_conf* mc);
+uint8_t measure_need_reply(struct measure_conf* mc);
+void measure_next_tick(struct measure_conf *mc, struct timespec *next);
diff --git a/src/tor_echo.c b/src/tor_echo.c
index 2572f96..7c33600 100644
--- a/src/tor_echo.c
+++ b/src/tor_echo.c
@@ -100,7 +100,7 @@ int main(int argc, char** argv) {
   enum TOR_ONION_FLAGS tof = TOR_ONION_FLAG_NONE;
   char url[1024];
   struct torecho_ctx tctx = {0};
-  tctx.mc.inhibit_exit = 1;
+  tctx.mc.is_server = 1;
   tctx.mc.payload_size = 1500;
 
   while ((opt = getopt(argc, argv, "ns:m")) != -1) {
@@ -130,7 +130,7 @@ int main(int argc, char** argv) {
     .socklist = NULL
   };
   struct evt_core_cat tcp_all = {
-    .app_ctx = &tctx,
+    .app_ctx = &tctx  ,
     .free_app_ctx = NULL,
     .cb = te_on_tcp,
     .err_cb = NULL,
diff --git a/src/udp_echo.c b/src/udp_echo.c
index 9294f41..92f3e34 100644
--- a/src/udp_echo.c
+++ b/src/udp_echo.c
@@ -45,7 +45,7 @@ int main(int argc, char** argv) {
   int opt, udp_sock, verbose = 0;
   char *port = NULL, *bindhost = NULL;
   struct evt_core_ctx evts = {0};
-  uctx.mc.inhibit_exit = 1;
+  uctx.mc.is_server = 1;
   uctx.mc.payload_size = 1500;
 
   // 1. Parse parameters