#include <stdio.h>
#include <stdlib.h>
+#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include "utcp.h"
+#define DIR_READ 1
+#define DIR_WRITE 2
+
struct utcp_connection *c;
-int dir = 3;
+int dir = DIR_READ | DIR_WRITE;
bool running = true;
+long inpktno;
+long outpktno;
+long dropfrom;
+long dropto;
+double reorder;
+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);
+ fprintf(stderr, "%lu.%lu ", now.tv_sec, now.tv_usec / 1000);
+ va_list ap;
+ va_start(ap, format);
+ 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) {
if(errno) {
- fprintf(stderr, "Error: %s\n", strerror(errno));
+ debug("Error: %s\n", strerror(errno));
dir = 0;
} else {
- dir &= ~2;
- fprintf(stderr, "Connection closed by peer\n");
+ dir &= ~DIR_WRITE;
+ debug("Connection closed by peer\n");
}
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);
}
void do_accept(struct utcp_connection *nc, uint16_t port) {
utcp_accept(nc, do_recv, NULL);
c = nc;
+ utcp_set_accept_cb(c->utcp, NULL, NULL);
}
ssize_t do_send(struct utcp *utcp, const void *data, size_t len) {
int s = *(int *)utcp->priv;
- if(drand48() < dropout)
- return len;
+ outpktno++;
+ if(outpktno >= dropfrom && outpktno < dropto) {
+ 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;
+ return len;
+ }
+ }
+ if(reorder_data) {
+ if(--reorder_countdown < 0) {
+ total_out += reorder_len;
+ send(s, reorder_data, reorder_len, MSG_DONTWAIT);
+ free(reorder_data);
+ reorder_data = NULL;
+ }
+ }
+
+ total_out += len;
ssize_t result = send(s, data, len, MSG_DONTWAIT);
if(result <= 0)
- fprintf(stderr, "Error sending UDP packet: %s\n", strerror(errno));
+ debug("Error sending UDP packet: %s\n", strerror(errno));
return result;
}
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"));
- dropin = atof(getenv("DROPIN") ?: "0");
- dropout = atof(getenv("DROPOUT") ?: "0");
+ char *reference_filename = getenv("REFERENCE");
+ if(reference_filename)
+ reference = fopen(reference_filename, "r");
+
+ if(dropto < dropfrom)
+ dropto = 1 << 30;
struct addrinfo *ai;
struct addrinfo hint = {
return 1;
int s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
- if(s < 0)
+ if(s == -1)
return 1;
if(server) {
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},
char buf[102400];
struct timeval timeout = utcp_timeout(u);
- while(dir) {
- size_t max = utcp_get_sndbuf_free(c);
+ while(!connected || utcp_is_active(u)) {
+ 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;
- if((dir & 1) && max)
- poll(fds, 2, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
+ debug("polling, dir = %d, timeout = %d\n", dir, timeout_ms);
+ if((dir & DIR_READ) && max)
+ poll(fds, 2, timeout_ms);
else
- poll(fds + 1, 1, timeout.tv_sec * 1000 + timeout.tv_usec / 1000);
+ poll(fds + 1, 1, timeout_ms);
if(fds[0].revents) {
fds[0].revents = 0;
- fprintf(stderr, "0");
+ debug("stdin\n");
ssize_t len = read(0, buf, max);
if(len <= 0) {
fds[0].fd = -1;
- dir &= ~1;
+ dir &= ~DIR_READ;
if(c)
utcp_shutdown(c, SHUT_WR);
- if(len < 0)
+ if(len == -1)
break;
else
continue;
if(c) {
ssize_t sent = utcp_send(c, buf, len);
if(sent != len)
- fprintf(stderr, "PANIEK: %zd != %zd\n", sent, len);
+ debug("Short send: %zd != %zd\n", sent, len);
}
}
if(fds[1].revents) {
fds[1].revents = 0;
- fprintf(stderr, "1");
+ debug("netin\n");
struct sockaddr_storage ss;
socklen_t sl = sizeof ss;
int len = recvfrom(s, buf, sizeof buf, MSG_DONTWAIT, (struct sockaddr *)&ss, &sl);
if(len <= 0) {
- fprintf(stderr, "Error receiving UDP packet: %s\n", strerror(errno));
+ debug("Error receiving UDP packet: %s\n", strerror(errno));
break;
}
if(!connected)
if(!connect(s, (struct sockaddr *)&ss, sl))
connected = true;
- if(drand48() >= dropin)
- utcp_recv(u, buf, len);
+ inpktno++;
+ if(inpktno >= dropto || inpktno < dropfrom || drand48() >= dropin) {
+ total_in += len;
+ if(utcp_recv(u, buf, len) == -1)
+ debug("Error receiving UTCP packet: %s\n", strerror(errno));
+ } else {
+ debug("Dropped incoming packet\n");
+ }
}
timeout = utcp_timeout(u);
utcp_close(c);
utcp_exit(u);
+ free(reorder_data);
+
+ debug("Total bytes in: %ld, out: %ld\n", total_in, total_out);
return 0;
}
projects / utcp / blobdiff