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shadowsocks-libev
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add server(not implemented yet)

pull/1/head
clowwindy 13 years ago
parent
dd06325bdf
commit
ab32e2a480
5 changed files with 553 additions and 4 deletions
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  1. 3
      Makefile.am
  2. 14
      Makefile.in
  3. 451
      server.c
  4. 52
      server.h
  5. 37
      socks5.h

3
Makefile.am
View File

@ -1,3 +1,4 @@
bin_PROGRAMS = local
bin_PROGRAMS = local server
local_SOURCES = encrypt.c encrypt.h local.c local.h
server_SOURCES = encrypt.c encrypt.h server.c server.h socks5.h

14
Makefile.in
View File

@ -32,7 +32,7 @@ POST_INSTALL = :
NORMAL_UNINSTALL = :
PRE_UNINSTALL = :
POST_UNINSTALL = :
bin_PROGRAMS = local$(EXEEXT)
bin_PROGRAMS = local$(EXEEXT) server$(EXEEXT)
subdir = .
DIST_COMMON = $(am__configure_deps) $(srcdir)/Makefile.am \
$(srcdir)/Makefile.in $(srcdir)/config.h.in \
@ -52,6 +52,9 @@ PROGRAMS = $(bin_PROGRAMS)
am_local_OBJECTS = encrypt.$(OBJEXT) local.$(OBJEXT)
local_OBJECTS = $(am_local_OBJECTS)
local_LDADD = $(LDADD)
am_server_OBJECTS = encrypt.$(OBJEXT) server.$(OBJEXT)
server_OBJECTS = $(am_server_OBJECTS)
server_LDADD = $(LDADD)
DEFAULT_INCLUDES = -I.@am__isrc@
depcomp = $(SHELL) $(top_srcdir)/depcomp
am__depfiles_maybe = depfiles
@ -60,8 +63,8 @@ COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
CCLD = $(CC)
LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
SOURCES = $(local_SOURCES)
DIST_SOURCES = $(local_SOURCES)
SOURCES = $(local_SOURCES) $(server_SOURCES)
DIST_SOURCES = $(local_SOURCES) $(server_SOURCES)
ETAGS = etags
CTAGS = ctags
DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
@ -166,6 +169,7 @@ top_build_prefix = @top_build_prefix@
top_builddir = @top_builddir@
top_srcdir = @top_srcdir@
local_SOURCES = encrypt.c encrypt.h local.c local.h
server_SOURCES = encrypt.c encrypt.h server.c server.h socks5.h
all: config.h
$(MAKE) $(AM_MAKEFLAGS) all-am
@ -260,6 +264,9 @@ clean-binPROGRAMS:
local$(EXEEXT): $(local_OBJECTS) $(local_DEPENDENCIES) $(EXTRA_local_DEPENDENCIES)
@rm -f local$(EXEEXT)
$(LINK) $(local_OBJECTS) $(local_LDADD) $(LIBS)
server$(EXEEXT): $(server_OBJECTS) $(server_DEPENDENCIES) $(EXTRA_server_DEPENDENCIES)
@rm -f server$(EXEEXT)
$(LINK) $(server_OBJECTS) $(server_LDADD) $(LIBS)
mostlyclean-compile:
-rm -f *.$(OBJEXT)
@ -269,6 +276,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/encrypt.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/local.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/server.Po@am__quote@
.c.o:
@am__fastdepCC_TRUE@ $(COMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<

451
server.c
View File

@ -0,0 +1,451 @@
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <langinfo.h>
#include <locale.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#include "server.h"
#include "encrypt.h"
#define SERVER "127.0.0.1"
#define REMOTE_PORT "8499"
#define PORT "1080"
#define KEY "foobar!"
#define REPLY "HTTP/1.1 200 OK\n\nhello"
#define min(a,b) \
({ typeof (a) _a = (a); \
typeof (b) _b = (b); \
_a < _b ? _a : _b; })
// every watcher type has its own typedef'd struct
// with the name ev_TYPE
ev_io stdin_watcher;
struct client_ctx {
ev_io io;
int fd;
};
int setnonblocking(int fd) {
int flags;
if (-1 ==(flags = fcntl(fd, F_GETFL, 0)))
flags = 0;
return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
int create_and_bind(char *port) {
struct addrinfo hints;
struct addrinfo *result, *rp;
int s, listen_sock;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Return IPv4 and IPv6 choices */
hints.ai_socktype = SOCK_STREAM; /* We want a TCP socket */
hints.ai_flags = AI_PASSIVE; /* All interfaces */
s = getaddrinfo("0.0.0.0", port, &hints, &result);
if (s != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(s));
return -1;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
listen_sock = socket(rp->ai_family, rp->ai_socktype, rp->ai_protocol);
int opt = 1;
setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
if (listen_sock == -1)
continue;
s = bind(listen_sock, rp->ai_addr, rp->ai_addrlen);
if (s == 0) {
/* We managed to bind successfully! */
break;
} else {
perror("bind");
}
close(listen_sock);
}
if (rp == NULL) {
fprintf(stderr, "Could not bind\n");
return -1;
}
freeaddrinfo(result);
return listen_sock;
}
static void server_recv_cb (EV_P_ ev_io *w, int revents) {
struct server_ctx *server_recv_ctx = (struct server_ctx *)w;
struct server *server = server_recv_ctx->server;
struct remote *remote = server->remote;
if (remote == NULL) {
close_and_free_server(EV_A_ server);
return;
}
while (1) {
ssize_t r = recv(server->fd, remote->buf, BUF_SIZE, 0);
if (r == 0) {
// connection closed
remote->buf_len = 0;
close_and_free_server(EV_A_ server);
if (remote != NULL) {
ev_io_start(EV_A_ &remote->send_ctx->io);
}
return;
} else if(r < 0) {
perror("recv");
if (errno == EAGAIN) {
// no data
// continue to wait for recv
break;
} else {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
}
encrypt(remote->buf, r);
int w = send(remote->fd, remote->buf, r, MSG_NOSIGNAL);
if(w == -1) {
perror("send");
if (errno == EAGAIN) {
// no data, wait for send
ev_io_stop(EV_A_ &server_recv_ctx->io);
ev_io_start(EV_A_ &remote->send_ctx->io);
break;
} else {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
} else if(w < r) {
char *pt;
for (pt = remote->buf; pt < pt + min(w, BUF_SIZE); pt++) {
*pt = *(pt + w);
}
remote->buf_len = r - w;
ev_io_stop(EV_A_ &server_recv_ctx->io);
ev_io_start(EV_A_ &remote->send_ctx->io);
break;
}
}
}
static void server_send_cb (EV_P_ ev_io *w, int revents) {
struct server_ctx *server_send_ctx = (struct server_ctx *)w;
struct server *server = server_send_ctx->server;
struct remote *remote = server->remote;
if (server->buf_len == 0) {
// close and free
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
} else {
// has data to send
ssize_t r = send(server->fd, server->buf,
server->buf_len, 0);
if (r < 0) {
perror("send");
if (errno != EAGAIN) {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
return;
}
if (r < server->buf_len) {
// printf("r=%d\n", r);
// printf("server->buf_len=%d\n", server->buf_len);
// partly sent, move memory, wait for the next time to send
char *pt;
for (pt = server->buf; pt < pt + min(r, BUF_SIZE); pt++) {
*pt = *(pt + r);
}
server->buf_len -= r;
return;
} else {
// all sent out, wait for reading
ev_io_stop(EV_A_ &server_send_ctx->io);
if (remote != NULL) {
ev_io_start(EV_A_ &remote->recv_ctx->io);
} else {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
}
}
}
static void remote_recv_cb (EV_P_ ev_io *w, int revents) {
struct remote_ctx *remote_recv_ctx = (struct remote_ctx *)w;
struct remote *remote = remote_recv_ctx->remote;
struct server *server = remote->server;
if (server == NULL) {
close_and_free_remote(EV_A_ remote);
return;
}
while (1) {
ssize_t r = recv(remote->fd, server->buf, BUF_SIZE, 0);
// printf("after recv: r=%d\n", r);
if (r == 0) {
// connection closed
server->buf_len = 0;
close_and_free_remote(EV_A_ remote);
if (server != NULL) {
ev_io_start(EV_A_ &server->send_ctx->io);
}
return;
} else if(r < 0) {
perror("recv");
if (errno == EAGAIN) {
// no data
// continue to wait for recv
break;
} else {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
}
decrypt(server->buf, r);
int w = send(server->fd, server->buf, r, MSG_NOSIGNAL);
// printf("after send: w=%d\n", w);
if(w == -1) {
perror("send");
if (errno == EAGAIN) {
// no data, wait for send
ev_io_stop(EV_A_ &remote_recv_ctx->io);
ev_io_start(EV_A_ &server->send_ctx->io);
break;
} else {
close_and_free_server(EV_A_ server);
close_and_free_remote(EV_A_ remote);
return;
}
} else if(w < r) {
char *pt;
for (pt = server->buf; pt < pt + min(w, BUF_SIZE); pt++) {
*pt = *(pt + w);
}
server->buf_len = r - w;
ev_io_stop(EV_A_ &remote_recv_ctx->io);
ev_io_start(EV_A_ &server->send_ctx->io);
break;
}
}
}
static void remote_send_cb (EV_P_ ev_io *w, int revents) {
struct remote_ctx *remote_send_ctx = (struct remote_ctx *)w;
struct remote *remote = remote_send_ctx->remote;
struct server *server = remote->server;
if (!remote_send_ctx->connected) {
socklen_t len;
struct sockaddr_storage addr;
char ipstr[INET6_ADDRSTRLEN];
int port;
len = sizeof addr;
int r = getpeername(remote->fd, (struct sockaddr*)&addr, &len);
if (r == 0) {
remote_send_ctx->connected = 1;
ev_io_stop(EV_A_ &remote_send_ctx->io);
ev_io_start(EV_A_ &server->recv_ctx->io);
ev_io_start(EV_A_ &remote->recv_ctx->io);
} else {
perror("getpeername");
// not connected
close_and_free_remote(EV_A_ remote);
close_and_free_server(EV_A_ server);
return;
}
} else {
if (remote->buf_len == 0) {
// close and free
close_and_free_remote(EV_A_ remote);
close_and_free_server(EV_A_ server);
return;
} else {
// has data to send
ssize_t r = send(remote->fd, remote->buf,
remote->buf_len, 0);
if (r < 0) {
perror("send");
if (errno != EAGAIN) {
// close and free
close_and_free_remote(EV_A_ remote);
close_and_free_server(EV_A_ server);
return;
}
return;
}
if (r < remote->buf_len) {
// partly sent, move memory, wait for the next time to send
char *pt;
for (pt = remote->buf; pt < pt + min(r, BUF_SIZE); pt++) {
*pt = *(pt + r);
}
remote->buf_len -= r;
return;
} else {
// all sent out, wait for reading
ev_io_stop(EV_A_ &remote_send_ctx->io);
if (server != NULL) {
ev_io_start(EV_A_ &server->recv_ctx->io);
} else {
close_and_free_remote(EV_A_ remote);
close_and_free_server(EV_A_ server);
return;
}
}
}
}
}
struct remote* new_remote(int fd) {
struct remote *remote;
remote = malloc(sizeof(struct remote));
remote->fd = fd;
remote->recv_ctx = malloc(sizeof(struct remote_ctx));
remote->send_ctx = malloc(sizeof(struct remote_ctx));
ev_io_init(&remote->recv_ctx->io, remote_recv_cb, fd, EV_READ);
ev_io_init(&remote->send_ctx->io, remote_send_cb, fd, EV_WRITE);
remote->recv_ctx->remote = remote;
remote->recv_ctx->connected = 0;
remote->send_ctx->remote = remote;
remote->send_ctx->connected = 0;
fprintf(stderr, "new remote\n");
return remote;
}
void free_remote(struct remote *remote) {
if (remote != NULL) {
if (remote->server != NULL) {
remote->server->remote = NULL;
}
free(remote->recv_ctx);
free(remote->send_ctx);
free(remote);
fprintf(stderr, "free remote\n");
}
}
void close_and_free_remote(EV_P_ struct remote *remote) {
if (remote != NULL) {
ev_io_stop(EV_A_ &remote->send_ctx->io);
ev_io_stop(EV_A_ &remote->recv_ctx->io);
close(remote->fd);
free_remote(remote);
}
}
struct server* new_server(int fd) {
struct server *server;
server = malloc(sizeof(struct server));
server->fd = fd;
server->recv_ctx = malloc(sizeof(struct server_ctx));
server->send_ctx = malloc(sizeof(struct server_ctx));
ev_io_init(&server->recv_ctx->io, server_recv_cb, fd, EV_READ);
ev_io_init(&server->send_ctx->io, server_send_cb, fd, EV_WRITE);
server->recv_ctx->server = server;
server->recv_ctx->connected = 0;
server->send_ctx->server = server;
server->send_ctx->connected = 0;
fprintf(stderr, "new server\n");
return server;
}
void free_server(struct server *server) {
if (server != NULL) {
if (server->remote != NULL) {
server->remote->server = NULL;
}
free(server->recv_ctx);
free(server->send_ctx);
free(server);
fprintf(stderr, "free server\n");
}
}
void close_and_free_server(EV_P_ struct server *server) {
if (server != NULL) {
ev_io_stop(EV_A_ &server->send_ctx->io);
ev_io_stop(EV_A_ &server->recv_ctx->io);
close(server->fd);
free_server(server);
}
}
static void accept_cb (EV_P_ ev_io *w, int revents)
{
struct listen_ctx *listener = (struct listen_ctx *)w;
int serverfd;
while (1) {
serverfd = accept(listener->fd, NULL, NULL);
if (serverfd == -1) {
perror("accept");
break;
}
struct server *server = new_server(serverfd);
struct addrinfo hints, *res;
int sockfd;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
getaddrinfo(SERVER, REMOTE_PORT, &hints, &res);
sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (sockfd < 0) {
perror("socket");
close(sockfd);
free_server(server);
continue;
}
setnonblocking(sockfd);
struct remote *remote = new_remote(sockfd);
server->remote = remote;
remote->server = server;
connect(sockfd, res->ai_addr, res->ai_addrlen);
// listen to remote connected event
ev_io_start(EV_A_ &remote->send_ctx->io);
break;
}
}
int main (void)
{
fprintf(stderr, "calculating ciphers\n");
get_table(KEY);
int listenfd;
listenfd = create_and_bind(PORT);
if (listenfd < 0) {
return 1;
}
if (listen(listenfd, SOMAXCONN) == -1) {
perror("listen() error.");
return 1;
}
fprintf(stderr, "server listening at port %s\n", PORT);
setnonblocking(listenfd);
struct listen_ctx listen_ctx;
listen_ctx.fd = listenfd;
struct ev_loop *loop = EV_DEFAULT;
ev_io_init (&listen_ctx.io, accept_cb, listenfd, EV_READ);
ev_io_start (loop, &listen_ctx.io);
ev_run (loop, 0);
return 0;
}

52
server.h
View File

@ -0,0 +1,52 @@
#pragma once
#include <ev.h>
#define BUF_SIZE 1500
struct listen_ctx {
ev_io io;
int fd;
struct sockaddr sock;
};
struct server {
int fd;
char buf[BUF_SIZE]; // server send from, remote recv into
int buf_len;
struct server_ctx *recv_ctx;
struct server_ctx *send_ctx;
struct remote *remote;
};
struct server_ctx {
ev_io io;
int connected;
struct server *server;
};
struct remote {
int fd;
char buf[BUF_SIZE]; // remote send from, server recv into
int buf_len;
struct remote_ctx *recv_ctx;
struct remote_ctx *send_ctx;
struct server *server;
};
struct remote_ctx {
ev_io io;
int connected;
struct remote *remote;
};
static void accept_cb (EV_P_ ev_io *w, int revents);
static void server_recv_cb (EV_P_ ev_io *w, int revents);
static void server_send_cb (EV_P_ ev_io *w, int revents);
static void remote_recv_cb (EV_P_ ev_io *w, int revents);
static void remote_send_cb (EV_P_ ev_io *w, int revents);
struct remote* new_remote(int fd);
void free_remote(struct remote *remote);
void close_and_free_remote(EV_P_ struct remote *remote);
struct server* new_server(int fd);
void free_server(struct server *server);
void close_and_free_server(EV_P_ struct server *server);

37
socks5.h
View File

@ -0,0 +1,37 @@
#pragma once
#define VERSION 0x05
#define CONNECT 0x01
#define IPV4 0x01
#define DOMAIN 0x03
#define IPV6 0x04
struct method_select_request
{
char ver;
char nmethods;
char methods[255];
};
struct method_select_response
{
char version;
char method;
};
struct socks5_request
{
char ver;
char cmd;
char rsv;
char atyp;
};
struct socks5_response
{
char ver;
char rep;
char rsv;
char atyp;
};
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