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shadowsocks-bootstrap
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feat: shadowsocks bootstrap

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dnomd343 3 years ago
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  1. 3110
      cJSON.c
  2. 293
      cJSON.h
  3. 419
      common.c
  4. 21
      common.h
  5. 44
      local.c
  6. 42
      network.c
  7. 6
      network.h
  8. 204
      process.c
  9. 15
      process.h
  10. 44
      server.c

3110
cJSON.c
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cJSON.h
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/*
Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#ifndef cJSON__h
#define cJSON__h
#ifdef __cplusplus
extern "C"
{
#endif
#if !defined(__WINDOWS__) && (defined(WIN32) || defined(WIN64) || defined(_MSC_VER) || defined(_WIN32))
#define __WINDOWS__
#endif
#ifdef __WINDOWS__
/* When compiling for windows, we specify a specific calling convention to avoid issues where we are being called from a project with a different default calling convention. For windows you have 3 define options:
CJSON_HIDE_SYMBOLS - Define this in the case where you don't want to ever dllexport symbols
CJSON_EXPORT_SYMBOLS - Define this on library build when you want to dllexport symbols (default)
CJSON_IMPORT_SYMBOLS - Define this if you want to dllimport symbol
For *nix builds that support visibility attribute, you can define similar behavior by
setting default visibility to hidden by adding
-fvisibility=hidden (for gcc)
or
-xldscope=hidden (for sun cc)
to CFLAGS
then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJSON_EXPORT_SYMBOLS does
*/
#define CJSON_CDECL __cdecl
#define CJSON_STDCALL __stdcall
/* export symbols by default, this is necessary for copy pasting the C and header file */
#if !defined(CJSON_HIDE_SYMBOLS) && !defined(CJSON_IMPORT_SYMBOLS) && !defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_EXPORT_SYMBOLS
#endif
#if defined(CJSON_HIDE_SYMBOLS)
#define CJSON_PUBLIC(type) type CJSON_STDCALL
#elif defined(CJSON_EXPORT_SYMBOLS)
#define CJSON_PUBLIC(type) __declspec(dllexport) type CJSON_STDCALL
#elif defined(CJSON_IMPORT_SYMBOLS)
#define CJSON_PUBLIC(type) __declspec(dllimport) type CJSON_STDCALL
#endif
#else /* !__WINDOWS__ */
#define CJSON_CDECL
#define CJSON_STDCALL
#if (defined(__GNUC__) || defined(__SUNPRO_CC) || defined (__SUNPRO_C)) && defined(CJSON_API_VISIBILITY)
#define CJSON_PUBLIC(type) __attribute__((visibility("default"))) type
#else
#define CJSON_PUBLIC(type) type
#endif
#endif
/* project version */
#define CJSON_VERSION_MAJOR 1
#define CJSON_VERSION_MINOR 7
#define CJSON_VERSION_PATCH 15
#include <stddef.h>
/* cJSON Types: */
#define cJSON_Invalid (0)
#define cJSON_False (1 << 0)
#define cJSON_True (1 << 1)
#define cJSON_NULL (1 << 2)
#define cJSON_Number (1 << 3)
#define cJSON_String (1 << 4)
#define cJSON_Array (1 << 5)
#define cJSON_Object (1 << 6)
#define cJSON_Raw (1 << 7) /* raw json */
#define cJSON_IsReference 256
#define cJSON_StringIsConst 512
/* The cJSON structure: */
typedef struct cJSON
{
/* next/prev allow you to walk array/object chains. Alternatively, use GetArraySize/GetArrayItem/GetObjectItem */
struct cJSON *next;
struct cJSON *prev;
/* An array or object item will have a child pointer pointing to a chain of the items in the array/object. */
struct cJSON *child;
/* The type of the item, as above. */
int type;
/* The item's string, if type==cJSON_String and type == cJSON_Raw */
char *valuestring;
/* writing to valueint is DEPRECATED, use cJSON_SetNumberValue instead */
int valueint;
/* The item's number, if type==cJSON_Number */
double valuedouble;
/* The item's name string, if this item is the child of, or is in the list of subitems of an object. */
char *string;
} cJSON;
typedef struct cJSON_Hooks
{
/* malloc/free are CDECL on Windows regardless of the default calling convention of the compiler, so ensure the hooks allow passing those functions directly. */
void *(CJSON_CDECL *malloc_fn)(size_t sz);
void (CJSON_CDECL *free_fn)(void *ptr);
} cJSON_Hooks;
typedef int cJSON_bool;
/* Limits how deeply nested arrays/objects can be before cJSON rejects to parse them.
* This is to prevent stack overflows. */
#ifndef CJSON_NESTING_LIMIT
#define CJSON_NESTING_LIMIT 1000
#endif
/* returns the version of cJSON as a string */
CJSON_PUBLIC(const char*) cJSON_Version(void);
/* Supply malloc, realloc and free functions to cJSON */
CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks* hooks);
/* Memory Management: the caller is always responsible to free the results from all variants of cJSON_Parse (with cJSON_Delete) and cJSON_Print (with stdlib free, cJSON_Hooks.free_fn, or cJSON_free as appropriate). The exception is cJSON_PrintPreallocated, where the caller has full responsibility of the buffer. */
/* Supply a block of JSON, and this returns a cJSON object you can interrogate. */
CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value);
CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length);
/* ParseWithOpts allows you to require (and check) that the JSON is null terminated, and to retrieve the pointer to the final byte parsed. */
/* If you supply a ptr in return_parse_end and parsing fails, then return_parse_end will contain a pointer to the error so will match cJSON_GetErrorPtr(). */
CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated);
CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated);
/* Render a cJSON entity to text for transfer/storage. */
CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item);
/* Render a cJSON entity to text for transfer/storage without any formatting. */
CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item);
/* Render a cJSON entity to text using a buffered strategy. prebuffer is a guess at the final size. guessing well reduces reallocation. fmt=0 gives unformatted, =1 gives formatted */
CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt);
/* Render a cJSON entity to text using a buffer already allocated in memory with given length. Returns 1 on success and 0 on failure. */
/* NOTE: cJSON is not always 100% accurate in estimating how much memory it will use, so to be safe allocate 5 bytes more than you actually need */
CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format);
/* Delete a cJSON entity and all subentities. */
CJSON_PUBLIC(void) cJSON_Delete(cJSON *item);
/* Returns the number of items in an array (or object). */
CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array);
/* Retrieve item number "index" from array "array". Returns NULL if unsuccessful. */
CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index);
/* Get item "string" from object. Case insensitive. */
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON * const object, const char * const string);
CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string);
/* For analysing failed parses. This returns a pointer to the parse error. You'll probably need to look a few chars back to make sense of it. Defined when cJSON_Parse() returns 0. 0 when cJSON_Parse() succeeds. */
CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void);
/* Check item type and return its value */
CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON * const item);
CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON * const item);
/* These functions check the type of an item */
CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON * const item);
CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON * const item);
/* These calls create a cJSON item of the appropriate type. */
CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean);
CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num);
CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string);
/* raw json */
CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw);
CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void);
CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void);
/* Create a string where valuestring references a string so
* it will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string);
/* Create an object/array that only references it's elements so
* they will not be freed by cJSON_Delete */
CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child);
CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child);
/* These utilities create an Array of count items.
* The parameter count cannot be greater than the number of elements in the number array, otherwise array access will be out of bounds.*/
CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count);
CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count);
/* Append item to the specified array/object. */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item);
/* Use this when string is definitely const (i.e. a literal, or as good as), and will definitely survive the cJSON object.
* WARNING: When this function was used, make sure to always check that (item->type & cJSON_StringIsConst) is zero before
* writing to `item->string` */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item);
/* Append reference to item to the specified array/object. Use this when you want to add an existing cJSON to a new cJSON, but don't want to corrupt your existing cJSON. */
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item);
CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item);
/* Remove/Detach items from Arrays/Objects. */
CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON * const item);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string);
CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string);
/* Update array items. */
CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem); /* Shifts pre-existing items to the right. */
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON * const parent, cJSON * const item, cJSON * replacement);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object,const char *string,cJSON *newitem);
CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object,const char *string,cJSON *newitem);
/* Duplicate a cJSON item */
CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse);
/* Duplicate will create a new, identical cJSON item to the one you pass, in new memory that will
* need to be released. With recurse!=0, it will duplicate any children connected to the item.
* The item->next and ->prev pointers are always zero on return from Duplicate. */
/* Recursively compare two cJSON items for equality. If either a or b is NULL or invalid, they will be considered unequal.
* case_sensitive determines if object keys are treated case sensitive (1) or case insensitive (0) */
CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON * const a, const cJSON * const b, const cJSON_bool case_sensitive);
/* Minify a strings, remove blank characters(such as ' ', '\t', '\r', '\n') from strings.
* The input pointer json cannot point to a read-only address area, such as a string constant,
* but should point to a readable and writable address area. */
CJSON_PUBLIC(void) cJSON_Minify(char *json);
/* Helper functions for creating and adding items to an object at the same time.
* They return the added item or NULL on failure. */
CJSON_PUBLIC(cJSON*) cJSON_AddNullToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddTrueToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddFalseToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddBoolToObject(cJSON * const object, const char * const name, const cJSON_bool boolean);
CJSON_PUBLIC(cJSON*) cJSON_AddNumberToObject(cJSON * const object, const char * const name, const double number);
CJSON_PUBLIC(cJSON*) cJSON_AddStringToObject(cJSON * const object, const char * const name, const char * const string);
CJSON_PUBLIC(cJSON*) cJSON_AddRawToObject(cJSON * const object, const char * const name, const char * const raw);
CJSON_PUBLIC(cJSON*) cJSON_AddObjectToObject(cJSON * const object, const char * const name);
CJSON_PUBLIC(cJSON*) cJSON_AddArrayToObject(cJSON * const object, const char * const name);
/* When assigning an integer value, it needs to be propagated to valuedouble too. */
#define cJSON_SetIntValue(object, number) ((object) ? (object)->valueint = (object)->valuedouble = (number) : (number))
/* helper for the cJSON_SetNumberValue macro */
CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number);
#define cJSON_SetNumberValue(object, number) ((object != NULL) ? cJSON_SetNumberHelper(object, (double)number) : (number))
/* Change the valuestring of a cJSON_String object, only takes effect when type of object is cJSON_String */
CJSON_PUBLIC(char*) cJSON_SetValuestring(cJSON *object, const char *valuestring);
/* Macro for iterating over an array or object */
#define cJSON_ArrayForEach(element, array) for(element = (array != NULL) ? (array)->child : NULL; element != NULL; element = element->next)
/* malloc/free objects using the malloc/free functions that have been set with cJSON_InitHooks */
CJSON_PUBLIC(void *) cJSON_malloc(size_t size);
CJSON_PUBLIC(void) cJSON_free(void *object);
#ifdef __cplusplus
}
#endif
#endif

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common.c
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cJSON.h"
#include "common.h"
#include "network.h"
#include "process.h"
char *server_addr, *client_addr;
char *server_port, *client_port;
char *password;
char *method;
char *timeout;
int fastopen;
char *plugin;
char *plugin_opts;
char *shadowsocks;
char **shadowsocks_opts;
void args_dump();
void args_init();
void error_exit(char *msg);
char* int_to_string(int num);
void pack_shadowsocks_params();
char* read_file(char *file_name);
void params_load(char *ss_default);
void json_decode(char *json_content);
void args_decode(int argc, char **argv);
void add_shadowsocks_option(char *option);
void extra_options_decode(char *extra_opts);
void error_exit(char *msg) { // throw error message with exit-code 1
printf("[Shadowsocks Bootstrap] ERROR: %s.\n", msg);
printf("[Shadowsocks Bootstrap] exit with error.\n");
exit(1);
}
char* int_to_string(int num) { // int -> string
if (num < 0) {
error_exit("number must be positive");
}
int count = 0;
int temp = num;
while(temp != 0) { // check the number of digits
temp /= 10;
++count;
}
char *str = (char*)malloc(count + 1);
sprintf(str, "%d", num);
return str;
}
void params_load(char *ss_default) { // load shadowsocks and plugin params
if (shadowsocks == NULL) {
shadowsocks = ss_default;
}
shadowsocks_opts[0] = shadowsocks; // fill with file name
if (plugin != NULL) { // with plugin
char *rand_port = int_to_string(get_available_port(RANDOM_PORT_START, RANDOM_PORT_END));
SS_REMOTE_HOST = server_addr;
SS_REMOTE_PORT = server_port;
SS_LOCAL_HOST = "127.0.0.1";
SS_LOCAL_PORT = rand_port;
server_addr = SS_LOCAL_HOST;
server_port = SS_LOCAL_PORT;
SS_PLUGIN_OPTIONS = plugin_opts;
}
pack_shadowsocks_params();
shadowsocks_file = shadowsocks;
shadowsocks_args = shadowsocks_opts;
if (plugin == NULL) {
plugin_file = NULL;
} else {
plugin_file = plugin;
}
}
void args_init() { // init arguments
server_addr = client_addr = NULL;
server_port = client_port = NULL;
password = NULL;
method = NULL;
timeout = NULL;
fastopen = 0;
plugin = NULL;
plugin_opts = NULL;
shadowsocks = NULL;
shadowsocks_opts = (char**)malloc(sizeof(char*) * 2);
shadowsocks_opts[0] = ""; // reserved for program name
shadowsocks_opts[1] = NULL;
}
char* read_file(char *file_name) { // read file content
FILE *pfile = fopen(file_name, "rb");
if (pfile == NULL) { // open failed
char *msg_prefix = "File `";
char *msg_suffix = "` open failed";
char *msg = (char*)malloc(strlen(msg_prefix) + strlen(file_name) + strlen(msg_suffix) + 1);
strcpy(msg, msg_prefix);
error_exit(strcat(strcat(msg, file_name), msg_suffix)); // merge error message
}
fseek(pfile, 0, SEEK_END);
int file_length = ftell(pfile); // get file length
char *file_content = (char*)malloc(file_length + 1); // malloc new memory
if (file_content == NULL) {
error_exit("no enough memory"); // file too large
}
rewind(pfile);
fread(file_content, 1, file_length, pfile); // read file stream
file_content[file_length] = '\0'; // set end flag
fclose(pfile);
return file_content;
}
void extra_options_decode(char *extra_opts) { // decode shadowsocks extra options
int num, i;
char *tmp = (char*)calloc(strlen(extra_opts) + 1, 1); // new memery and set as 0x00
num = i = 0;
for (;;) {
if (extra_opts[num] == '\0' || extra_opts[num] == ' ') { // string end or find a space
tmp[i] = '\0';
if (i) { // ignore empty string
add_shadowsocks_option(tmp);
}
if (extra_opts[num] == '\0') { // string end
break;
}
num++;
i = 0;
continue;
}
if (extra_opts[num] == '\\') { // skip '\' char
num++;
}
tmp[i++] = extra_opts[num++]; // copy char
}
}
void add_shadowsocks_option(char *option) { // add shadowsocks options
int opt_num = 0;
while(shadowsocks_opts[opt_num++] != NULL); // get options number
shadowsocks_opts = (char**)realloc(shadowsocks_opts, sizeof(char**) * (opt_num + 1));
shadowsocks_opts[opt_num - 1] = strcpy((char*)malloc(strlen(option) + 1), option);
shadowsocks_opts[opt_num] = NULL; // end sign
}
void pack_shadowsocks_params() { // packaging shadowsocks parameters
if (server_addr != NULL) {
add_shadowsocks_option("-s");
add_shadowsocks_option(server_addr);
}
if (client_addr != NULL) {
add_shadowsocks_option("-b");
add_shadowsocks_option(client_addr);
}
if (server_port != NULL) {
add_shadowsocks_option("-p");
add_shadowsocks_option(server_port);
}
if (client_port != NULL) {
add_shadowsocks_option("-l");
add_shadowsocks_option(client_port);
}
if (password != NULL) {
add_shadowsocks_option("-k");
add_shadowsocks_option(password);
}
if (method != NULL) {
add_shadowsocks_option("-m");
add_shadowsocks_option(method);
}
if (timeout != NULL) {
add_shadowsocks_option("-t");
add_shadowsocks_option(timeout);
}
if (fastopen) {
add_shadowsocks_option("--fast-open");
}
}
void json_decode(char *json_content) { // decode JSON content
cJSON* json = NULL;
json = cJSON_Parse(json_content);
if (json == NULL) {
error_exit("JSON format error.\n");
}
json = json->child;
while (json != NULL) {
if (!strcmp(json->string, "server")) { // server => server_addr
if (!cJSON_IsString(json)) {
error_exit("`server` must be a string.\n");
}
if (server_addr != NULL) {
free(server_addr);
}
server_addr = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "local_address")) { // local_address => client_addr
if (!cJSON_IsString(json)) {
error_exit("`local_address` must be a string.\n");
}
if (client_addr != NULL) {
free(client_addr);
}
client_addr = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "server_port")) { // server_port => server_port
if (server_port != NULL) {
free(server_port);
}
if (cJSON_IsNumber(json)) {
server_port = int_to_string(json->valueint);
} else if (cJSON_IsString(json)) {
server_port = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else {
error_exit("`server_port` must be a number or string.\n");
}
} else if (!strcmp(json->string, "local_port")) { // local_port => client_port
if (client_port != NULL) {
free(client_port);
}
if (cJSON_IsNumber(json)) {
client_port = int_to_string(json->valueint);
} else if (cJSON_IsString(json)) {
client_port = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else {
error_exit("`local_port` must be a number or string.\n");
}
} else if (!strcmp(json->string, "password")) { // password => password
if (!cJSON_IsString(json)) {
error_exit("`password` must be a string.\n");
}
if (password != NULL) {
free(password);
}
password = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "timeout")) { // timeout => timeout
if (timeout != NULL) {
free(timeout);
}
if (cJSON_IsNumber(json)) {
timeout = int_to_string(json->valueint);
} else if (cJSON_IsString(json)) {
timeout = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else {
error_exit("`timeout` must be a number or string.\n");
}
} else if (!strcmp(json->string, "method")) { // method => method
if (!cJSON_IsString(json)) {
error_exit("`method` must be a string.\n");
}
if (method != NULL) {
free(method);
}
method = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "fast_open")) { // fast_open => fastopen
if (!cJSON_IsBool(json)) {
error_exit("`fast_open` must be a bool.\n");
}
fastopen = json->valueint;
} else if (!strcmp(json->string, "plugin")) { // plugin => plugin
if (!cJSON_IsString(json)) {
error_exit("`plugin` must be a string.\n");
}
if (plugin != NULL) {
free(plugin);
}
plugin = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "plugin_opts")) { // plugin_opts => plugin_opts
if (!cJSON_IsString(json)) {
error_exit("`plugin_opts` must be a string.\n");
}
if (plugin_opts != NULL) {
free(plugin_opts);
}
plugin_opts = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "shadowsocks")) { // shadowsocks => shadowsocks
if (!cJSON_IsString(json)) {
error_exit("`shadowsocks` must be a string.\n");
}
if (shadowsocks != NULL) {
free(shadowsocks);
}
shadowsocks = strcpy((char*)malloc(strlen(json->valuestring) + 1), json->valuestring);
} else if (!strcmp(json->string, "extra_opts")) { // extra_opts => DECODE => shadowsocks_opts
if (!cJSON_IsString(json)) {
error_exit("`extra_opts` must be a string.\n");
}
extra_options_decode(json->valuestring);
} else { // unknow field => ERROR
char *msg_prefix = "Unknow JSON field `";
char *msg_suffix = "`.\n";
char *msg = (char*)malloc(strlen(msg_prefix) + strlen(json->string) + strlen(msg_suffix) + 1);
strcpy(msg, msg_prefix);
error_exit(strcat(strcat(msg, json->string), msg_suffix));
}
json = json->next; // next field
}
cJSON_free(json); // free JSON struct
}
void args_decode(int argc, char **argv) { // decode the input parameters
args_init();
int i;
for (i = 1; i < argc; ++i) {
if (!strcmp(argv[i], "-c")) { // -c => CONFIG_JSON
if (i + 1 == argc) {
error_exit("`-c` require a parameter");
}
json_decode(read_file(argv[++i]));
} else if (!strcmp(argv[i], "-s")) { // -s => server_addr
if (i + 1 == argc) {
error_exit("`-s` require a parameter");
}
if (server_addr != NULL) {
free(server_addr);
}
server_addr = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-p")) { // -p => server_port
if (i + 1 == argc) {
error_exit("`-p` require a parameter");
}
if (server_port != NULL) {
free(server_port);
}
server_port = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-b")) { // -b => client_addr
if (i + 1 == argc) {
error_exit("`-b` require a parameter");
}
if (client_addr != NULL) {
free(client_addr);
}
client_addr = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-l")) { // -l => client_port
if (i + 1 == argc) {
error_exit("`-l` require a parameter");
}
if (client_port != NULL) {
free(client_port);
}
client_port = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-k")) { // -k => password
if (i + 1 == argc) {
error_exit("`-k` require a parameter");
}
if (password != NULL) {
free(password);
}
password = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-m")) { // -m => method
if (i + 1 == argc) {
error_exit("`-m` require a parameter");
}
if (method != NULL) {
free(method);
}
method = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "-t")) { // -t => timeout
if (i + 1 == argc) {
error_exit("`-t` require a parameter");
}
if (timeout != NULL) {
free(timeout);
}
timeout = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "--fast-open")) { // --fast-open
fastopen = 1;
} else if (!strcmp(argv[i], "--plugin")) { // --plugin => plugin
if (i + 1 == argc) {
error_exit("`--plugin` require a parameter");
}
if (plugin != NULL) {
free(plugin);
}
plugin = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "--plugin-opts")) { // --plugin-opts => plugin_opts
if (i + 1 == argc) {
error_exit("`--plugin-opts` require a parameter");
}
if (plugin_opts != NULL) {
free(plugin_opts);
}
plugin_opts = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else if (!strcmp(argv[i], "--shadowsocks")) { // --shadowsocks => shadowsocks
if (i + 1 == argc) {
error_exit("`--shadowsocks` require a parameter");
}
if (shadowsocks != NULL) {
free(shadowsocks);
}
shadowsocks = strcpy((char*)malloc(strlen(argv[i]) + 1), argv[++i]);
} else { // unknow option => archive
add_shadowsocks_option(argv[i]); // archive unknow options
}
}
}
void args_dump() { // show parameter's content
printf("server_addr = %s\n", server_addr);
printf("client_addr = %s\n", client_addr);
printf("server_port = %s\n", server_port);
printf("client_port = %s\n", client_port);
printf("password = %s\n", password);
printf("method = %s\n", method);
printf("timeout = %s\n", timeout);
if (fastopen) {
printf("fastopen = true\n");
} else {
printf("fastopen = false\n");
}
printf("shadowsocks = %s\n", shadowsocks);
printf("plugin = %s\n", plugin);
printf("plugin_opts = %s\n", plugin_opts);
int num = 0;
printf("options:\n");
while(shadowsocks_opts[num] != NULL) {
printf(" '%s'\n", shadowsocks_opts[num]);
num++;
}
}

21
common.h
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@ -0,0 +1,21 @@
#ifndef _COMMON_H_
#define _COMMON_H_
#define RANDOM_PORT_START 41952
#define RANDOM_PORT_END 65535
extern char *server_addr, *client_addr;
extern char *server_port, *client_port;
extern char *password;
extern char *method;
extern char *timeout;
extern int fastopen;
extern char *plugin;
extern char *plugin_opts;
extern char *shadowsocks;
extern char **shadowsocks_opts;
void params_load(char *ss_default);
void args_decode(int argc, char **argv);
#endif

44
local.c
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#include <stdio.h>
#include <string.h>
#include "common.h"
#include "process.h"
#define SHADOWSOCKS_DEFAULT "sslocal"
char *help_msg =
"\
\n\
ss-bootstrap-local\n\
\n\
A simple program to make the original shadowsocks support SIP003 plugins.\n\
\n\
-s <server_host> Host name or IP address of your remote server.\n\
-p <server_port> Port number of your remote server.\n\
-b <local_address> Local address to bind.\n\
-l <local_port> Port number of your local server.\n\
\n\
-c <config_file> Path to JSON config file.\n\
-k <password> Password of your remote server.\n\
-m <method> Encrypt method.\n\
-t <timeout> Socket timeout in seconds.\n\
--fast-open Enable TCP fast open (with Linux kernel 3.7+).\n\
--plugin <name> Enable SIP003 plugin.\n\
--plugin-opts <options> Set SIP003 plugin options.\n\
--shadowsocks <sslocal> Set shadowsocks local program.\n\
-h, --help Print this message.\n\
\n\
";
int main(int argc, char *argv[]) {
int i = 0;
for (i = 0; i < argc; ++i) {
if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
printf("%s", help_msg); // show help message
return 0;
}
}
args_decode(argc, argv);
params_load(SHADOWSOCKS_DEFAULT); // default file name
start_bootstrap();
return 0;
}

42
network.c
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@ -0,0 +1,42 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <netinet/in.h>
#include "network.h"
int get_random_num(int range_start, int range_end) { // create a random number in range
struct timeval tp;
gettimeofday(&tp, NULL);
srand(tp.tv_usec);
return range_start + (rand() % (range_end - range_start + 1));
}
int check_port_available(unsigned short port) { // test a port is available or not
struct sockaddr_in server_addr;
memset(&server_addr, 0, sizeof(server_addr)); // struct init
server_addr.sin_family = AF_INET; // set as IP communication
server_addr.sin_addr.s_addr = htonl(INADDR_ANY); // allow any connection
server_addr.sin_port = htons(port); // set telnet port
int server_sockfd = socket(AF_INET, SOCK_STREAM, 0); // socket created
if (server_sockfd < 0) { // create failed
return 0;
}
if (bind(server_sockfd, (struct sockaddr*)&server_addr, sizeof(struct sockaddr)) < 0) { // bind failed
return 0;
}
if (close(server_sockfd) != 0) { // close failed
return 0;
}
return 1; // port available
}
int get_available_port(unsigned short range_start, unsigned short range_end) { // get a available port
unsigned short port;
for (;;) { // wait until a available port in range
port = get_random_num(range_start, range_end); // get a random port in range
if (check_port_available(port)) { // port available
return (int)port;
}
}
}

6
network.h
View File

@ -0,0 +1,6 @@
#ifndef _NETWORK_H_
#define _NETWORK_H_
int get_available_port(unsigned short range_start, unsigned short range_end);
#endif

204
process.c
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@ -0,0 +1,204 @@
#include <glib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
#include <sys/prctl.h>
#include "process.h"
char *shadowsocks_file;
char **shadowsocks_args;
char *plugin_file;
char *SS_REMOTE_HOST;
char *SS_REMOTE_PORT;
char *SS_LOCAL_HOST;
char *SS_LOCAL_PORT;
char *SS_PLUGIN_OPTIONS;
char **plugin_env;
char *plugin_arg[] = { NULL, NULL };
int exiting = 0;
typedef struct exit_info {
int pid;
int exit_code;
int exit_signal;
} exit_info;
GMainLoop* main_loop;
pid_t ss_pid = 0, plugin_pid = 0;
void show_params();
void process_exec();
void get_sub_exit();
void exit_with_child();
void plugin_env_load();
void show_exit_info(exit_info info);
exit_info get_exit_info(int status, pid_t pid);
void show_exit_info(exit_info info) { // show info of child process death
printf("(PID = %d) -> ", info.pid);
if (info.exit_code != -1) { // exit normally
printf("exit code %d.\n", info.exit_code);
} else if (info.exit_signal != -1) { // abnormal exit
printf("killed by signal %d.\n", info.exit_signal);
} else {
printf("unknow reason.\n");
}
}
exit_info get_exit_info(int status, pid_t pid) { // get why the child process death
exit_info temp;
temp.pid = pid;
temp.exit_code = temp.exit_signal = -1;
if (WIFEXITED(status)) { // exit normally (with a exit-code)
temp.exit_code = WEXITSTATUS(status);
}
if (WIFSIGNALED(status)) { // abnormal exit (with a signal)
temp.exit_signal = WTERMSIG(status);
}
return temp;
}
void get_sub_exit() { // catch child process die
exit_info sub_exit_info;
int ss_ret, plugin_ret, ss_status, plugin_status;
if (exiting) {
int status;
waitpid(0, &status, 0);
return;
}
if (ss_pid != 0) {
ss_ret = waitpid(ss_pid, &ss_status, WNOHANG); // non-blocking
if (ss_ret == -1) {
perror("[Shadowsocks Bootstrap] shadowsocks waitpid error");
exit_with_child();
} else if (ss_ret) { // ss exit
sub_exit_info = get_exit_info(ss_status, ss_pid);
printf("[Shadowsocks Bootstrap] shadowsocks exit ");
show_exit_info(sub_exit_info);
exit_with_child();
}
}
if (plugin_file != NULL && plugin_pid != 0) { // with plugin
plugin_ret = waitpid(plugin_pid, &plugin_status, WNOHANG); // non-blocking
if (plugin_ret == -1) {
perror("[Shadowsocks Bootstrap] plugin waitpid error");
exit_with_child();
} else if (plugin_ret) { // plugin exit
sub_exit_info = get_exit_info(plugin_status, plugin_pid);
printf("[Shadowsocks Bootstrap] plugin exit ");
show_exit_info(sub_exit_info);
exit_with_child();
}
}
g_main_loop_quit(main_loop); // exit main loop
}
void plugin_env_load() { // load plugin's environment variable
char *remote_host = "SS_REMOTE_HOST=";
char *remote_port = "SS_REMOTE_PORT=";
char *local_host = "SS_LOCAL_HOST=";
char *local_port = "SS_LOCAL_PORT=";
char *plugin_options = "SS_PLUGIN_OPTIONS=";
plugin_env = (char**)malloc(sizeof(char*) * 6);
plugin_env[0] = (char*)malloc(strlen(remote_host) + strlen(SS_REMOTE_HOST) + 1);
plugin_env[1] = (char*)malloc(strlen(remote_port) + strlen(SS_REMOTE_PORT) + 1);
plugin_env[2] = (char*)malloc(strlen(local_host) + strlen(SS_LOCAL_HOST) + 1);
plugin_env[3] = (char*)malloc(strlen(local_port) + strlen(SS_LOCAL_PORT) + 1);
strcat(strcpy(plugin_env[0], remote_host), SS_REMOTE_HOST);
strcat(strcpy(plugin_env[1], remote_port), SS_REMOTE_PORT);
strcat(strcpy(plugin_env[2], local_host), SS_LOCAL_HOST);
strcat(strcpy(plugin_env[3], local_port), SS_LOCAL_PORT);
if (SS_PLUGIN_OPTIONS == NULL) {
plugin_env[4] = NULL;
} else {
plugin_env[4] = (char*)malloc(strlen(plugin_options) + strlen(SS_PLUGIN_OPTIONS) + 1);
strcat(strcpy(plugin_env[4], plugin_options), SS_PLUGIN_OPTIONS);
}
plugin_env[5] = NULL;
plugin_arg[0] = plugin_file;
}
void process_exec() { // run shadowsocks main process and plugin (as child process)
if ((ss_pid = fork()) < 0) {
perror("[Shadowsocks Bootstrap] fork error");
exit_with_child();
} else if (ss_pid == 0) { // child process
prctl(PR_SET_PDEATHSIG, SIGKILL); // child die with his father
if (execvp(shadowsocks_args[0], shadowsocks_args) < 0) {
perror("[Shadowsocks Bootstrap] shadowsocks exec error");
exit(2);
}
}
if (plugin_file == NULL) { // plugin no need
return;
}
usleep(100 * 1000); // sleep 100ms (python always a little slower)
if (exiting) { // cancel plugin exec
return;
}
if ((plugin_pid = fork()) < 0) {
perror("[Shadowsocks Bootstrap] fork error");
exit_with_child();
} else if (plugin_pid == 0) { // child process
prctl(PR_SET_PDEATHSIG, SIGKILL); // child die with his father
plugin_env_load();
if (execvpe(plugin_file, plugin_arg, plugin_env) < 0) {
perror("[Shadowsocks Bootstrap] plugin exec error");
exit(2);
}
}
}
void exit_with_child() { // exit and kill his child process
if (exiting) {
for (;;) {
sleep(1); // block
}
}
exiting = 1;
if (ss_pid != 0) {
kill(ss_pid, SIGKILL);
printf("[Shadowsocks Bootstrap] kill shadowsocks process.\n");
}
if (plugin_file != NULL && plugin_pid != 0) {
kill(plugin_pid, SIGKILL);
printf("[Shadowsocks Bootstrap] kill plugin process.\n");
}
int status;
printf("[Shadowsocks Bootstrap] wait for child process.\n");
waitpid(0, &status, 0); // block
printf("[Shadowsocks Bootstrap] exit.\n");
exit(1);
}
void show_params() { // show shadowsocks and plugin params
int num = 0;
printf("[Shadowsocks Bootstrap]");
while(shadowsocks_args[num] != NULL) {
printf(" %s", shadowsocks_args[num++]);
}
printf("\n");
if (plugin_file == NULL) {
printf("[Shadowsocks Bootstrap] plugin no need.\n");
return;
}
printf("[Shadowsocks Bootstrap] plugin -> %s\n", plugin_file);
printf("[Shadowsocks Bootstrap] SS_REMOTE_HOST -> %s\n", SS_REMOTE_HOST);
printf("[Shadowsocks Bootstrap] SS_REMOTE_PORT -> %s\n", SS_REMOTE_PORT);
printf("[Shadowsocks Bootstrap] SS_LOCAL_HOST -> %s\n", SS_LOCAL_HOST);
printf("[Shadowsocks Bootstrap] SS_LOCAL_PORT -> %s\n", SS_LOCAL_PORT);
printf("[Shadowsocks Bootstrap] SS_PLUGIN_OPTIONS -> %s\n", SS_PLUGIN_OPTIONS);
}
void start_bootstrap() { // start shadowsocks and plugin (optional)
show_params();
main_loop = g_main_loop_new(NULL, FALSE);
signal(SIGINT, exit_with_child); // catch Ctrl + C (2)
signal(SIGTERM, exit_with_child); // catch exit signal (15)
signal(SIGCHLD, get_sub_exit); // callback when child process die
process_exec(); // exec child process
g_main_loop_run(main_loop); // into main loop for wait
exit_with_child();
}

15
process.h
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@ -0,0 +1,15 @@
#ifndef _PROCESS_H_
#define _PROCESS_H_
extern char *shadowsocks_file;
extern char **shadowsocks_args;
extern char *plugin_file;
extern char *SS_REMOTE_HOST;
extern char *SS_REMOTE_PORT;
extern char *SS_LOCAL_HOST;
extern char *SS_LOCAL_PORT;
extern char *SS_PLUGIN_OPTIONS;
void start_bootstrap();
#endif

44
server.c
View File

@ -0,0 +1,44 @@
#include <stdio.h>
#include <string.h>
#include "common.h"
#include "process.h"
#define SHADOWSOCKS_DEFAULT "ssserver"
char *help_msg =
"\
\n\
ss-bootstrap-server\n\
\n\
A simple program to make the original shadowsocks support SIP003 plugins.\n\
\n\
-s <server_host> Host name or IP address of your remote server.\n\
-p <server_port> Port number of your remote server.\n\
-b <local_address> Local address to bind.\n\
-l <local_port> Port number of your local server.\n\
\n\
-c <config_file> Path to JSON config file.\n\
-k <password> Password of your remote server.\n\
-m <method> Encrypt method.\n\
-t <timeout> Socket timeout in seconds.\n\
--fast-open Enable TCP fast open (with Linux kernel 3.7+).\n\
--plugin <name> Enable SIP003 plugin.\n\
--plugin-opts <options> Set SIP003 plugin options.\n\
--shadowsocks <ssservre> Set shadowsocks server program.\n\
-h, --help Print this message.\n\
\n\
";
int main(int argc, char *argv[]) {
int i = 0;
for (i = 0; i < argc; ++i) {
if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "--help")) {
printf("%s", help_msg); // show help message
return 0;
}
}
args_decode(argc, argv);
params_load(SHADOWSOCKS_DEFAULT); // default file name
start_bootstrap();
return 0;
}
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