emsApplication/3rdPartner/libhv/examples/nc.c

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2024-05-24 12:19:45 +08:00
/*
* network client
*
* @build: make examples
* @server bin/httpd -s restart -d
* @usage: bin/nc 127.0.0.1 8080
* > GET / HTTP/1.1
* > Connection: close
* > [Enter]
* > GET / HTTP/1.1
* > Connection: keep-alive
* > [Enter]
*/
/*
* @test udp client
* @build ./configure && make examples
* @client bin/nc -u 127.0.0.1 1234
*
*/
/*
* @test ssl client
* @build ./configure --with-openssl && make clean && make
* @client bin/nc -s 127.0.0.1 1234
*
*/
/*
* @test kcp client
* @build ./configure --with-kcp && make clean && make
* @client bin/nc -k 127.0.0.1 1234
*
*/
#include "hloop.h"
#include "hbase.h"
#include "hsocket.h"
#include "hssl.h"
#define RECV_BUFSIZE 8192
static char recvbuf[RECV_BUFSIZE];
static char protocol = 't';
static const char* protocolname = "tcp";
// for stdin
static hio_t* stdinio = NULL;
// for socket
static hio_t* sockio = NULL;
static int verbose = 0;
static void send_heartbeat(hio_t* io) {
static char buf[] = "PING\r\n";
// printf("send_heartbeat %s", buf);
hio_write(io, buf, 6);
}
static void on_recv(hio_t* io, void* buf, int readbytes) {
// printf("on_recv fd=%d readbytes=%d\n", hio_fd(io), readbytes);
if (verbose) {
char localaddrstr[SOCKADDR_STRLEN] = {0};
char peeraddrstr[SOCKADDR_STRLEN] = {0};
printf("[%s] <=> [%s]\n",
SOCKADDR_STR(hio_localaddr(io), localaddrstr),
SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
}
printf("%.*s", readbytes, (char*)buf);
// test hio_set_readbuf in hread_cb
#if 0
static int total_readbytes = 0;
total_readbytes += readbytes;
if (total_readbytes >= RECV_BUFSIZE) {
total_readbytes = 0;
}
hio_set_readbuf(io, recvbuf + total_readbytes, RECV_BUFSIZE - total_readbytes);
printf("%.*s", total_readbytes, recvbuf);
#endif
fflush(stdout);
}
static void on_stdin(hio_t* io, void* buf, int readbytes) {
// printf("on_stdin fd=%d readbytes=%d\n", hio_fd(io), readbytes);
// printf("> %s\n", buf);
char* str = (char*)buf;
// test hio_read_start/hio_read_stop/hio_close/hloop_stop
#if 1
if (strncmp(str, "start", 5) == 0) {
printf("call hio_read_start\n");
hio_read_start(sockio);
return;
}
else if (strncmp(str, "stop", 4) == 0) {
printf("call hio_read_stop\n");
hio_read_stop(sockio);
return;
}
else if (strncmp(str, "close", 5) == 0) {
printf("call hio_close\n");
hio_close(sockio);
return;
}
else if (strncmp(str, "quit", 4) == 0) {
printf("call hloop_stop\n");
hloop_stop(hevent_loop(io));
return;
}
#endif
// CR|LF => CRLF for test most protocols
char eol = str[readbytes-1];
if (eol == '\n' || eol == '\r') {
if (readbytes > 1 && str[readbytes-2] == '\r' && eol == '\n') {
// have been CRLF
}
else {
++readbytes;
str[readbytes - 2] = '\r';
str[readbytes - 1] = '\n';
}
}
hio_write(sockio, buf, readbytes);
if (strncmp(str, "CLOSE", 5) == 0) {
printf("call hio_close\n");
hio_close(sockio);
}
}
static void on_close(hio_t* io) {
// printf("on_close fd=%d error=%d\n", hio_fd(io), hio_error(io));
hio_del(stdinio, HV_READ);
}
static void on_connect(hio_t* io) {
// printf("on_connect fd=%d\n", hio_fd(io));
if (verbose) {
char localaddrstr[SOCKADDR_STRLEN] = {0};
char peeraddrstr[SOCKADDR_STRLEN] = {0};
printf("connect connfd=%d [%s] => [%s]\n", hio_fd(io),
SOCKADDR_STR(hio_localaddr(io), localaddrstr),
SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
}
hio_read_start(io);
// uncomment to test heartbeat
// hio_set_heartbeat(sockio, 3000, send_heartbeat);
}
int main(int argc, char** argv) {
if (argc < 3) {
printf("\
Usage: nc [-tusk] host port\n\
Options:\n\
-t Use tcp protocol (default)\n\
-u Use udp protocol\n\
-s Use ssl protocol\n\
-k Use kcp protocol\n\
Examples: nc 127.0.0.1 80\n\
nc -u 127.0.0.1 80\n");
return -10;
}
int index = 1;
if (argv[1][0] == '-') {
protocol = argv[1][1];
switch(protocol) {
case 't': protocolname = "tcp"; break;
case 'u': protocolname = "udp"; break;
case 's': protocolname = "ssl"; break;
case 'k': protocolname = "kcp"; break;
default: fprintf(stderr, "Unsupported protocol '%c'\n", protocol); exit(1);
}
++index;
}
const char* host = argv[index++];
int port = atoi(argv[index++]);
if (verbose) {
printf("%s %s %d\n", protocolname, host, port);
}
HV_MEMCHECK;
hloop_t* loop = hloop_new(HLOOP_FLAG_QUIT_WHEN_NO_ACTIVE_EVENTS);
// stdin use default readbuf
stdinio = hread(loop, 0, NULL, 0, on_stdin);
if (stdinio == NULL) {
return -20;
}
// socket
if (protocol == 't' || protocol == 's') {
// tcp
sockio = hloop_create_tcp_client(loop, host, port, on_connect, on_close);
if (sockio == NULL) {
return -20;
}
if (protocol == 's') {
if (strcmp(hssl_backend(), "nossl") == 0) {
fprintf(stderr, "Please recompile WITH_SSL!\n");
exit(1);
}
hio_enable_ssl(sockio);
}
}
else if (protocol == 'u' || protocol == 'k') {
// udp
sockio = hloop_create_udp_client(loop, host, port);
if (sockio == NULL) {
return -20;
}
if (protocol == 'k') {
#if WITH_KCP
static kcp_setting_t s_kcp_setting;
kcp_setting_init_with_normal_mode(&s_kcp_setting);
s_kcp_setting.conv = hv_rand(1, 999999);
hio_set_kcp(sockio, &s_kcp_setting);
#else
fprintf(stderr, "Please recompile WITH_KCP!\n");
exit(1);
#endif
}
hio_read(sockio);
}
// printf("sockfd=%d\n", hio_fd(sockio));
hio_setcb_close(sockio, on_close);
hio_setcb_read(sockio, on_recv);
hio_set_readbuf(sockio, recvbuf, RECV_BUFSIZE);
hloop_run(loop);
hloop_free(&loop);
return 0;
}