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#include <stdio.h>
#include <time.h>
#if defined(_WIN32) || defined(WIN32)
#include <windows.h>
void INIT(void) {WSADATA wsaData; WSAStartup(MAKEWORD(2,2), &wsaData);}
#else
#define INIT()
#include <unistd.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#endif
int connect_to_server(const struct sockaddr_in * serv_addr)
{
int sockfd;
/* Create a socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
perror("ERROR opening socket");
return -1;
}
/* Connect to the server */
if (connect(sockfd, (const sockaddr *)serv_addr, sizeof(*serv_addr)) < 0) {
perror("ERROR connecting");
close(sockfd);
return -2;
}
return sockfd;
}
int send_to_server(int conn, const char * request)
{
int req_len = strlen(request);
int n;
n = write(conn, request, req_len);
if (n < 0) {
perror("ERROR writing to socket");
return 0;
}
return (n==req_len);
}
int read_from_server(int conn)
{
char rbuffer[1024];
int n;
long ret;
n = read(conn, rbuffer, sizeof(rbuffer));
if (n < 0) {
perror("ERROR reading from socket");
return 0;
}
if (strncmp("HTTP/1.", rbuffer, 7)) {
perror("ERROR not a HTTP response");
return 0;
}
ret = atol(rbuffer + 9);
return ret;
}
int main(int argc, char *argv[])
{
long portno;
int i, con_count=1;
time_t t1,t2,t3,t4;
char wbuffer[256];
int connlist[1024*65];
int result[1024*65];
struct hostent *server;
struct sockaddr_in serv_addr;
INIT();
if (argc != 4) {
fprintf(stderr,"Usage:\n\t%s hostname port clients\n\n", argv[0]);
exit(0);
}
con_count = atol(argv[3]);
if (con_count<1) con_count=1;
if (con_count>1024*65) con_count=1024*65;
portno = atol(argv[2]);
if (portno<1l || portno>0xFFFFl) {
fprintf(stderr, "ERROR, invalid port\n");
exit(0);
}
server = gethostbyname(argv[1]);
if (server == NULL) {
fprintf(stderr, "ERROR, no such host\n");
exit(0);
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
memcpy(server->h_addr, &serv_addr.sin_addr.s_addr, server->h_length);
serv_addr.sin_port = htons((short)portno);
sprintf(wbuffer, "GET / HTTP/1.0\r\n\r\n");
t1 = time(0);
for (i=0;i<con_count;i++) {
result[i] = connlist[i] = connect_to_server(&serv_addr);
}
t2 = time(0);
for (i=0;i<con_count;i++) {
if (result[i]>=0) {
result[i] = send_to_server(connlist[i], wbuffer);
}
}
t3 = time(0);
for (i=0;i<con_count;i++) {
if (result[i]>=0) {
result[i] = read_from_server(connlist[i]);
}
}
t4 = time(0);
printf("\n");
printf("conn: %.0lf\n", difftime(t2,t1));
printf("write: %.0lf\n", difftime(t3,t2));
printf("read: %.0lf\n", difftime(t4,t3));
for (i=-10;i<1000;i++) {
int j,cnt=0;
for(j=0;j<con_count;j++) {
if (result[j]==i) cnt++;
}
if (cnt>0) {
printf("%5i\t%7i\n", i, cnt);
}
}
return 0;
}
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