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tcp_echo_server.c
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/*
* tcp echo server
*
* @build make examples
* @server bin/tcp_echo_server 1234
* @client bin/nc 127.0.0.1 1234
* nc 127.0.0.1 1234
* telnet 127.0.0.1 1234
*/
#include "hloop.h"
#include "hsocket.h"
#include "hssl.h"
/*
* @test ssl_server
* #define TEST_SSL 1
*
* @build ./configure --with-openssl && make clean && make
*
*/
#define TEST_SSL 0
#define TEST_READ_ONCE 0
#define TEST_READ_UNTIL 0
#define TEST_READ_STOP 0
#define TEST_UNPACK 0
#if TEST_UNPACK
unpack_setting_t unpack_setting;
#endif
// hloop_create_tcp_server -> on_accept -> hio_read -> on_recv -> hio_write
static void on_close(hio_t* io) {
printf("on_close fd=%d error=%d\n", hio_fd(io), hio_error(io));
}
static void on_recv(hio_t* io, void* buf, int readbytes) {
printf("on_recv fd=%d readbytes=%d\n", hio_fd(io), readbytes);
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);
// echo
printf("> %.*s", readbytes, (char*)buf);
hio_write(io, buf, readbytes);
#if TEST_READ_STOP
hio_read_stop(io);
#elif TEST_READ_ONCE
hio_read_once(io);
#elif TEST_READ_UNTIL
hio_read_until(io, TEST_READ_UNTIL);
#endif
}
static void on_accept(hio_t* io) {
printf("on_accept connfd=%d\n", hio_fd(io));
char localaddrstr[SOCKADDR_STRLEN] = {0};
char peeraddrstr[SOCKADDR_STRLEN] = {0};
printf("accept connfd=%d [%s] <= [%s]\n", hio_fd(io),
SOCKADDR_STR(hio_localaddr(io), localaddrstr),
SOCKADDR_STR(hio_peeraddr(io), peeraddrstr));
hio_setcb_close(io, on_close);
hio_setcb_read(io, on_recv);
#if TEST_UNPACK
hio_set_unpack(io, &unpack_setting);
#endif
#if TEST_READ_ONCE
hio_read_once(io);
#elif TEST_READ_UNTIL
hio_read_until(io, TEST_READ_UNTIL);
#else
hio_read_start(io);
#endif
}
int main(int argc, char** argv) {
if (argc < 2) {
printf("Usage: %s port\n", argv[0]);
return -10;
}
int port = atoi(argv[1]);
#if TEST_SSL
hssl_ctx_init_param_t ssl_param;
memset(&ssl_param, 0, sizeof(ssl_param));
ssl_param.crt_file = "cert/server.crt";
ssl_param.key_file = "cert/server.key";
ssl_param.endpoint = HSSL_SERVER;
if (hssl_ctx_init(&ssl_param) == NULL) {
fprintf(stderr, "hssl_ctx_init failed!\n");
return -30;
}
#endif
#if TEST_UNPACK
memset(&unpack_setting, 0, sizeof(unpack_setting_t));
unpack_setting.package_max_length = DEFAULT_PACKAGE_MAX_LENGTH;
unpack_setting.mode = UNPACK_BY_DELIMITER;
unpack_setting.delimiter[0] = '\r';
unpack_setting.delimiter[1] = '\n';
unpack_setting.delimiter_bytes = 2;
#endif
hloop_t* loop = hloop_new(0);
#if TEST_SSL
hio_t* listenio = hloop_create_ssl_server(loop, "0.0.0.0", port, on_accept);
#else
hio_t* listenio = hloop_create_tcp_server(loop, "0.0.0.0", port, on_accept);
#endif
if (listenio == NULL) {
return -20;
}
printf("listenfd=%d\n", hio_fd(listenio));
hloop_run(loop);
hloop_free(&loop);
return 0;
}