mirror of
https://github.com/ilyakooo0/urbit.git
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140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
/* Copyright StrongLoop, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef DEFS_H_
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#define DEFS_H_
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#include "s5.h"
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#include "uv.h"
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#include <assert.h>
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#include <netinet/in.h> /* sockaddr_in, sockaddr_in6 */
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#include <stddef.h> /* size_t, ssize_t */
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#include <stdint.h>
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#include <sys/socket.h> /* sockaddr */
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struct client_ctx;
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typedef struct {
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const char *bind_host;
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unsigned short bind_port;
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unsigned int idle_timeout;
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} server_config;
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typedef struct {
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unsigned int idle_timeout; /* Connection idle timeout in ms. */
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uv_tcp_t tcp_handle;
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uv_loop_t *loop;
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} server_ctx;
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typedef struct {
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unsigned char rdstate;
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unsigned char wrstate;
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unsigned int idle_timeout;
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struct client_ctx *client; /* Backlink to owning client context. */
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ssize_t result;
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union {
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uv_handle_t handle;
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uv_stream_t stream;
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uv_tcp_t tcp;
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uv_udp_t udp;
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} handle;
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uv_timer_t timer_handle; /* For detecting timeouts. */
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uv_write_t write_req;
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/* We only need one of these at a time so make them share memory. */
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union {
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uv_getaddrinfo_t addrinfo_req;
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uv_connect_t connect_req;
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uv_req_t req;
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struct sockaddr_in6 addr6;
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struct sockaddr_in addr4;
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struct sockaddr addr;
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char buf[2048]; /* Scratch space. Used to read data into. */
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} t;
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} conn;
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typedef struct client_ctx {
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unsigned int state;
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server_ctx *sx; /* Backlink to owning server context. */
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s5_ctx parser; /* The SOCKS protocol parser. */
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conn incoming; /* Connection with the SOCKS client. */
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conn outgoing; /* Connection with upstream. */
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} client_ctx;
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/* server.c */
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int server_run(const server_config *cf, uv_loop_t *loop);
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int can_auth_none(const server_ctx *sx, const client_ctx *cx);
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int can_auth_passwd(const server_ctx *sx, const client_ctx *cx);
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int can_access(const server_ctx *sx,
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const client_ctx *cx,
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const struct sockaddr *addr);
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/* client.c */
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void client_finish_init(server_ctx *sx, client_ctx *cx);
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/* util.c */
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#if defined(__GNUC__)
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# define ATTRIBUTE_FORMAT_PRINTF(a, b) __attribute__((format(printf, a, b)))
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#else
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# define ATTRIBUTE_FORMAT_PRINTF(a, b)
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#endif
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void pr_info(const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);
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void pr_warn(const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);
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void pr_err(const char *fmt, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);
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void *xmalloc(size_t size);
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/* main.c */
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const char *_getprogname(void);
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/* getopt.c */
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#if !HAVE_UNISTD_H
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extern char *optarg;
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int getopt(int argc, char **argv, const char *options);
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#endif
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/* ASSERT() is for debug checks, CHECK() for run-time sanity checks.
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* DEBUG_CHECKS is for expensive debug checks that we only want to
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* enable in debug builds but still want type-checked by the compiler
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* in release builds.
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*/
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#if defined(NDEBUG)
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# define ASSERT(exp)
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# define CHECK(exp) do { if (!(exp)) abort(); } while (0)
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# define DEBUG_CHECKS (0)
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#else
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# define ASSERT(exp) assert(exp)
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# define CHECK(exp) assert(exp)
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# define DEBUG_CHECKS (1)
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#endif
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#define UNREACHABLE() CHECK(!"Unreachable code reached.")
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/* This macro looks complicated but it's not: it calculates the address
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* of the embedding struct through the address of the embedded struct.
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* In other words, if struct A embeds struct B, then we can obtain
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* the address of A by taking the address of B and subtracting the
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* field offset of B in A.
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*/
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#define CONTAINER_OF(ptr, type, field) \
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((type *) ((char *) (ptr) - ((char *) &((type *) 0)->field)))
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#endif /* DEFS_H_ */
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