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shadowsocks-libev
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pull/14/head
Max Lv 12 years ago
parent
5846e389e1
commit
4d30a8a7bf
5 changed files with 2029 additions and 0 deletions
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  1. 207
      src/cache.c
  2. 17
      src/cache.h
  3. 793
      src/udprelay.c
  4. 64
      src/udprelay.h
  5. 948
      src/uthash.h

207
src/cache.c
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/*
* Original Author: Oliver Lorenz (ol), olli@olorenz.org, https://olorenz.org
* License: This is licensed under the same terms as uthash itself
*/
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include "cache.h"
#include "uthash.h"
/**
* A cache entry
*/
struct client_cache_entry {
char *key; /**<The key */
void *data; /**<Payload */
UT_hash_handle hh; /**<Hash Handle for uthash */
};
#define KEY_MAX_LENGTH 32
/**
* A cache object
*/
struct client_cache {
size_t max_entries; /**<Amount of entries this cache object can hold */
pthread_rwlock_t cache_lock; /**<A lock for concurrent access */
struct client_cache_entry *entries; /**<Head pointer for uthash */
void (*free_cb) (void *element);/**<Callback function to free cache entries */
};
/** Creates a new cache object
@param dst
Where the newly allocated cache object will be stored in
@param capacity
The maximum number of elements this cache object can hold
@return EINVAL if dst is NULL, ENOMEM if malloc fails, 0 otherwise
*/
int client_cache_create(struct client_cache **dst, const size_t capacity,
void (*free_cb) (void *element))
{
struct client_cache *new = NULL;
int rv;
if (!dst)
return EINVAL;
if ((new = malloc(sizeof(*new))) == NULL)
return ENOMEM;
if ((rv = pthread_rwlock_init(&(new->cache_lock), NULL)) != 0)
goto err_out;
new->max_entries = capacity;
new->entries = NULL;
new->free_cb = free_cb;
*dst = new;
return 0;
err_out:
if (new)
free(new);
return rv;
}
/** Frees an allocated cache object
@param cache
The cache object to free
@param keep_data
Whether to free contained data or just delete references to it
@return EINVAL if cache is NULL, 0 otherwise
*/
int client_cache_delete(struct client_cache *cache, int keep_data)
{
struct client_cache_entry *entry, *tmp;
int rv;
if (!cache)
return EINVAL;
rv = pthread_rwlock_wrlock(&(cache->cache_lock));
if (rv)
return rv;
if (keep_data) {
HASH_CLEAR(hh, cache->entries);
} else {
HASH_ITER(hh, cache->entries, entry, tmp) {
HASH_DEL(cache->entries, entry);
if (cache->free_cb)
cache->free_cb(entry->data);
free(entry);
}
}
(void)pthread_rwlock_unlock(&(cache->cache_lock));
(void)pthread_rwlock_destroy(&(cache->cache_lock));
free(cache);
cache = NULL;
return 0;
}
/** Checks if a given key is in the cache
@param cache
The cache object
@param key
The key to look-up
@param result
Where to store the result if key is found.
A warning: Even though result is just a pointer,
you have to call this function with a **ptr,
otherwise this will blow up in your face.
@return EINVAL if cache is NULL, 0 otherwise
*/
int client_cache_lookup(struct client_cache *cache, char *key, void *result)
{
int rv;
struct client_cache_entry *tmp = NULL;
char **dirty_hack = result;
if (!cache || !key || !result)
return EINVAL;
rv = pthread_rwlock_wrlock(&(cache->cache_lock));
if (rv)
return rv;
HASH_FIND_STR(cache->entries, key, tmp);
if (tmp) {
size_t key_len = strnlen(tmp->key, KEY_MAX_LENGTH);
HASH_DELETE(hh, cache->entries, tmp);
HASH_ADD_KEYPTR(hh, cache->entries, tmp->key, key_len, tmp);
*dirty_hack = tmp->data;
} else {
*dirty_hack = result = NULL;
}
rv = pthread_rwlock_unlock(&(cache->cache_lock));
return rv;
}
/** Inserts a given <key, value> pair into the cache
@param cache
The cache object
@param key
The key that identifies <value>
@param data
Data associated with <key>
@return EINVAL if cache is NULL, ENOMEM if malloc fails, 0 otherwise
*/
int client_cache_insert(struct client_cache *cache, char *key, void *data)
{
struct client_cache_entry *entry = NULL;
struct client_cache_entry *tmp_entry = NULL;
size_t key_len = 0;
int rv;
if (!cache || !data)
return EINVAL;
if ((entry = malloc(sizeof(*entry))) == NULL)
return ENOMEM;
if ((rv = pthread_rwlock_wrlock(&(cache->cache_lock))) != 0)
goto err_out;
entry->key = key;
entry->data = data;
key_len = strnlen(entry->key, KEY_MAX_LENGTH);
HASH_ADD_KEYPTR(hh, cache->entries, entry->key, key_len, entry);
if (HASH_COUNT(cache->entries) >= cache->max_entries) {
HASH_ITER(hh, cache->entries, entry, tmp_entry) {
HASH_DELETE(hh, cache->entries, entry);
if (cache->free_cb)
cache->free_cb(entry->data);
else
free(entry->data);
/* free(key->key) if data has been copied */
free(entry);
break;
}
}
rv = pthread_rwlock_unlock(&(cache->cache_lock));
return rv;
err_out:
if (entry)
free(entry);
(void)pthread_rwlock_unlock(&(cache->cache_lock));
return rv;
}

17
src/cache.h
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/*
* Original Author: Oliver Lorenz (ol), olli@olorenz.org, https://olorenz.org
* License: This is licensed under the same terms as uthash itself
*/
#ifndef _CACHE_
#define _CACHE_
struct client_cache;
extern int client_cache_create(struct foo_cache **dst, const size_t capacity,
void (*free_cb) (void *element));
extern int client_cache_delete(struct foo_cache *cache, int keep_data);
extern int client_cache_lookup(struct foo_cache *cache, char *key, void *result);
extern int client_cache_insert(struct foo_cache *cache, char *key, void *data);
#endif

793
src/udprelay.c
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#include <sys/stat.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H) && defined(__linux__)
#include <net/if.h>
#include <sys/ioctl.h>
#define SET_INTERFACE
#endif
#include "utils.h"
#include "udprelay.h"
#include "cache.h"
#ifndef EAGAIN
#define EAGAIN EWOULDBLOCK
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK EAGAIN
#endif
static int verbose = 0;
static int client_conn = 0;
static int server_conn = 0;
int setnonblocking(int fd) {
int flags;
if (-1 ==(flags = fcntl(fd, F_GETFL, 0)))
flags = 0;
return fcntl(fd, F_SETFL, flags | O_NONBLOCK);
}
#ifdef SET_INTERFACE
int setinterface(int socket_fd, const char* interface_name)
{
struct ifreq interface;
memset(&interface, 0, sizeof(interface));
strncpy(interface.ifr_name, interface_name, IFNAMSIZ);
int res = setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE, &interface, sizeof(struct ifreq));
return res;
}
#endif
int create_and_bind(const char *host, const 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 */
s = getaddrinfo(host, port, &hints, &result);
if (s != 0) {
LOGE("getaddrinfo: %s", 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);
if (listen_sock == -1)
continue;
int opt = 1;
setsockopt(listen_sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
setsockopt(listen_sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
#ifdef SO_NOSIGPIPE
setsockopt(listen_sock, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt));
#endif
s = bind(listen_sock, rp->ai_addr, rp->ai_addrlen);
if (s == 0) {
/* We managed to bind successfully! */
break;
} else {
ERROR("bind");
}
close(listen_sock);
}
if (rp == NULL) {
LOGE("Could not bind");
return -1;
}
freeaddrinfo(result);
return listen_sock;
}
struct client *connect_to_client(struct addrinfo *res, const char *iface) {
int sockfd;
int opt = 1;
// initilize client socks
sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (sockfd < 0) {
ERROR("socket");
close(sockfd);
return NULL;
}
setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
#ifdef SO_NOSIGPIPE
setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt));
#endif
struct client *client = new_client(sockfd);
// setup client socks
setnonblocking(sockfd);
#ifdef SET_INTERFACE
if (iface) setinterface(sockfd, iface);
#endif
connect(sockfd, res->ai_addr, res->ai_addrlen);
return client;
}
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 client *client = NULL;
int len = server->buf_len;
char **buf = &server->buf;
ev_timer_again(EV_A_ &server->recv_ctx->watcher);
if (server->stage != 0) {
client = server->client;
buf = &client->buf;
len = 0;
}
ssize_t r = recv(server->fd, *buf + len, BUF_SIZE - len, 0);
if (r == 0) {
// connection closed
if (verbose) {
LOGD("server_recv close the connection");
}
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
} else if (r == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// no data
// continue to wait for recv
return;
} else {
ERROR("server recv");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
}
// handle incomplete header
if (server->stage == 0) {
r += server->buf_len;
if (r <= enc_get_iv_len()) {
// wait for more
if (verbose) {
LOGD("imcomplete header: %zu", r);
}
server->buf_len = r;
return;
} else {
server->buf_len = 0;
}
}
*buf = ss_decrypt(*buf, &r, server->d_ctx);
if (*buf == NULL) {
LOGE("invalid password or cipher");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
// handshake and transmit data
if (server->stage == 5) {
int s = send(client->fd, client->buf, r, 0);
if (s == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// no data, wait for send
client->buf_len = r;
client->buf_idx = 0;
ev_io_stop(EV_A_ &server_recv_ctx->io);
ev_io_start(EV_A_ &client->send_ctx->io);
} else {
ERROR("server_recv_send");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
} else if (s < r) {
client->buf_len = r - s;
client->buf_idx = s;
ev_io_stop(EV_A_ &server_recv_ctx->io);
ev_io_start(EV_A_ &client->send_ctx->io);
}
return;
} else if (server->stage == 0) {
/*
* Shadowsocks Protocol:
*
* +------+----------+----------+
* | ATYP | DST.ADDR | DST.PORT |
* +------+----------+----------+
* | 1 | Variable | 2 |
* +------+----------+----------+
*/
int offset = 0;
char atyp = server->buf[offset++];
char host[256];
char port[64];
memset(host, 0, 256);
int p = 0;
// get client addr and port
if (atyp == 1) {
// IP V4
size_t in_addr_len = sizeof(struct in_addr);
if (r > in_addr_len) {
inet_ntop(AF_INET, (const void *)(server->buf + offset),
host, INET_ADDRSTRLEN);
offset += in_addr_len;
}
} else if (atyp == 3) {
// Domain name
uint8_t name_len = *(uint8_t *)(server->buf + offset);
if (name_len < r && name_len < 255 && name_len > 0) {
memcpy(host, server->buf + offset + 1, name_len);
offset += name_len + 1;
}
} else if (atyp == 4) {
// IP V6
size_t in6_addr_len = sizeof(struct in6_addr);
if (r > in6_addr_len) {
inet_ntop(AF_INET6, (const void*)(server->buf + offset),
host, INET6_ADDRSTRLEN);
offset += in6_addr_len;
}
}
if (offset == 1) {
LOGE("invalid header with addr type %d", atyp);
close_and_free_server(EV_A_ server);
return;
}
p = ntohs(*(uint16_t *)(server->buf + offset));
offset += 2;
sprintf(port, "%d", p);
if (verbose) {
LOGD("connect to: %s:%s", host, port);
}
struct addrinfo hints;
asyncns_query_t *query;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
query = asyncns_getaddrinfo(server->shadowsocks_ctx->asyncns,
host, port, &hints);
if (query == NULL) {
ERROR("asyncns_getaddrinfo");
close_and_free_server(EV_A_ server);
return;
}
// XXX: should handle buffer carefully
if (r > offset) {
server->buf_len = r - offset;
server->buf_idx = offset;
}
server->stage = 4;
server->query = query;
ev_io_stop(EV_A_ &server_recv_ctx->io);
ev_timer_start(EV_A_ &server->send_ctx->watcher);
return;
}
// should not reach here
FATAL("server context error.");
}
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 client *client = server->client;
if (client == NULL) {
LOGE("invalid server.");
close_and_free_server(EV_A_ server);
return;
}
if (server->buf_len == 0) {
// close and free
if (verbose) {
LOGD("server_send close the connection");
}
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
} else {
// has data to send
ssize_t s = send(server->fd, server->buf + server->buf_idx,
server->buf_len, 0);
if (s < 0) {
if (errno != EAGAIN && errno != EWOULDBLOCK) {
ERROR("server_send_send");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
return;
} else if (s < server->buf_len) {
// partly sent, move memory, wait for the next time to send
server->buf_len -= s;
server->buf_idx += s;
return;
} else {
// all sent out, wait for reading
server->buf_len = 0;
server->buf_idx = 0;
ev_io_stop(EV_A_ &server_send_ctx->io);
if (client != NULL) {
ev_io_start(EV_A_ &client->recv_ctx->io);
return;
} else {
LOGE("invalid client.");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
}
}
}
static void server_timeout_cb(EV_P_ ev_timer *watcher, int revents) {
struct server_ctx *server_ctx = (struct server_ctx *) (((void*)watcher)
- sizeof(ev_io));
struct server *server = server_ctx->server;
struct client *client = server->client;
LOGE("TCP connection timeout");
ev_timer_stop(EV_A_ watcher);
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
static void server_resolve_cb(EV_P_ ev_timer *watcher, int revents) {
int err;
struct addrinfo *result, *rp;
struct server_ctx *server_ctx = (struct server_ctx *) (((void*)watcher)
- sizeof(ev_io));
struct server *server = server_ctx->server;
asyncns_t *asyncns = server->shadowsocks_ctx->asyncns;
asyncns_query_t *query = server->query;
if (asyncns == NULL || query == NULL) {
LOGE("invalid dns query.");
close_and_free_server(EV_A_ server);
return;
}
if (asyncns_wait(asyncns, 0) == -1) {
// asyncns error
FATAL("asyncns exit unexpectedly.");
}
if (!asyncns_isdone(asyncns, query)) {
// wait for reolver
return;
}
if (verbose) {
LOGD("asyncns resolved.");
}
ev_timer_stop(EV_A_ watcher);
err = asyncns_getaddrinfo_done(asyncns, query, &result);
if (err) {
ERROR("getaddrinfo");
close_and_free_server(EV_A_ server);
} else {
// Use IPV4 address if possible
for (rp = result; rp != NULL; rp = rp->ai_next) {
if (rp->ai_family == AF_INET) break;
}
if (rp == NULL) {
rp = result;
}
struct client *client = connect_to_client(rp, server->shadowsocks_ctx->iface);
if (client == NULL) {
LOGE("connect error.");
close_and_free_server(EV_A_ server);
} else {
server->client = client;
client->server = server;
// XXX: should handel buffer carefully
if (server->buf_len > 0) {
memcpy(client->buf, server->buf + server->buf_idx, server->buf_len);
client->buf_len = server->buf_len;
client->buf_idx = 0;
server->buf_len = 0;
server->buf_idx = 0;
}
// listen to client connected event
ev_io_start(EV_A_ &client->send_ctx->io);
}
}
// release addrinfo
asyncns_freeaddrinfo(result);
}
static void client_recv_cb (EV_P_ ev_io *w, int revents) {
struct client_ctx *client_recv_ctx = (struct client_ctx *)w;
struct client *client = client_recv_ctx->client;
struct server *server = client->server;
if (server == NULL) {
LOGE("invalid server.");
close_and_free_client(EV_A_ client);
return;
}
ev_timer_again(EV_A_ &server->recv_ctx->watcher);
ssize_t r = recv(client->fd, server->buf, BUF_SIZE, 0);
if (r == 0) {
// connection closed
if (verbose) {
LOGD("client_recv close the connection");
}
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
} else if (r < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// no data
// continue to wait for recv
return;
} else {
ERROR("client recv");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
}
server->buf = ss_encrypt(server->buf, &r, server->e_ctx);
if (server->buf == NULL) {
LOGE("invalid password or cipher");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
int s = send(server->fd, server->buf, r, 0);
if (s == -1) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// no data, wait for send
server->buf_len = r;
server->buf_idx = 0;
ev_io_stop(EV_A_ &client_recv_ctx->io);
ev_io_start(EV_A_ &server->send_ctx->io);
} else {
ERROR("client_recv_send");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
return;
} else if (s < r) {
server->buf_len = r - s;
server->buf_idx = s;
ev_io_stop(EV_A_ &client_recv_ctx->io);
ev_io_start(EV_A_ &server->send_ctx->io);
return;
}
}
static void client_send_cb (EV_P_ ev_io *w, int revents) {
struct client_ctx *client_send_ctx = (struct client_ctx *)w;
struct client *client = client_send_ctx->client;
struct server *server = client->server;
if (server == NULL) {
LOGE("invalid server.");
close_and_free_client(EV_A_ client);
return;
}
if (!client_send_ctx->connected) {
struct sockaddr_storage addr;
socklen_t len = sizeof addr;
int r = getpeername(client->fd, (struct sockaddr*)&addr, &len);
if (r == 0) {
if (verbose) {
LOGD("client connected.");
}
client_send_ctx->connected = 1;
if (client->buf_len == 0) {
server->stage = 5;
ev_io_stop(EV_A_ &client_send_ctx->io);
ev_io_start(EV_A_ &server->recv_ctx->io);
ev_io_start(EV_A_ &client->recv_ctx->io);
return;
}
} else {
ERROR("getpeername");
// not connected
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
}
}
if (client->buf_len == 0) {
// close and free
if (verbose) {
LOGD("client_send close the connection");
}
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
return;
} else {
// has data to send
ssize_t s = send(client->fd, client->buf + client->buf_idx,
client->buf_len, 0);
if (s == -1) {
if (errno != EAGAIN && errno != EWOULDBLOCK) {
ERROR("client_send_send");
// close and free
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
return;
} else if (s < client->buf_len) {
// partly sent, move memory, wait for the next time to send
client->buf_len -= s;
client->buf_idx += s;
return;
} else {
// all sent out, wait for reading
client->buf_len = 0;
client->buf_idx = 0;
ev_io_stop(EV_A_ &client_send_ctx->io);
if (server != NULL) {
ev_io_start(EV_A_ &server->recv_ctx->io);
if (server->stage == 4) {
server->stage = 5;
ev_io_start(EV_A_ &client->recv_ctx->io);
}
} else {
LOGE("invalid server.");
close_and_free_client(EV_A_ client);
close_and_free_server(EV_A_ server);
}
return;
}
}
}
struct client* new_client(int fd) {
client_conn++;
struct client *client;
client = malloc(sizeof(struct client));
client->buf = malloc(BUF_SIZE);
client->recv_ctx = malloc(sizeof(struct client_ctx));
client->send_ctx = malloc(sizeof(struct client_ctx));
client->fd = fd;
ev_io_init(&client->recv_ctx->io, client_recv_cb, fd, EV_READ);
ev_io_init(&client->send_ctx->io, client_send_cb, fd, EV_WRITE);
client->recv_ctx->client = client;
client->recv_ctx->connected = 0;
client->send_ctx->client = client;
client->send_ctx->connected = 0;
client->buf_len = 0;
client->buf_idx = 0;
client->server = NULL;
return client;
}
void free_client(struct client *client) {
client_conn--;
if (client != NULL) {
if (client->server != NULL) {
client->server->client = NULL;
}
if (client->buf != NULL) {
free(client->buf);
}
free(client->recv_ctx);
free(client->send_ctx);
free(client);
}
}
void close_and_free_client(EV_P_ struct client *client) {
if (client != NULL) {
ev_io_stop(EV_A_ &client->send_ctx->io);
ev_io_stop(EV_A_ &client->recv_ctx->io);
close(client->fd);
free_client(client);
}
if (verbose) {
LOGD("current client connection: %d", client_conn);
}
}
struct server* new_server(int fd, struct shadowsocks_ctx *listener) {
server_conn++;
struct server *server;
server = malloc(sizeof(struct server));
server->buf = malloc(BUF_SIZE);
server->recv_ctx = malloc(sizeof(struct server_ctx));
server->send_ctx = malloc(sizeof(struct server_ctx));
server->fd = fd;
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);
ev_timer_init(&server->send_ctx->watcher, server_resolve_cb, 0.2, 0.5);
ev_timer_init(&server->recv_ctx->watcher, server_timeout_cb, listener->timeout, listener->timeout * 5);
server->recv_ctx->server = server;
server->recv_ctx->connected = 0;
server->send_ctx->server = server;
server->send_ctx->connected = 0;
server->stage = 0;
server->query = NULL;
server->shadowsocks_ctx = listener;
if (listener->method) {
server->e_ctx = malloc(sizeof(struct enc_ctx));
server->d_ctx = malloc(sizeof(struct enc_ctx));
enc_ctx_init(listener->method, server->e_ctx, 1);
enc_ctx_init(listener->method, server->d_ctx, 0);
} else {
server->e_ctx = NULL;
server->d_ctx = NULL;
}
server->buf_len = 0;
server->buf_idx = 0;
server->client = NULL;
return server;
}
void free_server(struct server *server) {
server_conn--;
if (server != NULL) {
if (server->client != NULL) {
server->client->server = NULL;
}
if (server->e_ctx != NULL) {
EVP_CIPHER_CTX_cleanup(&server->e_ctx->evp);
free(server->e_ctx);
}
if (server->d_ctx != NULL) {
EVP_CIPHER_CTX_cleanup(&server->d_ctx->evp);
free(server->d_ctx);
}
if (server->buf != NULL) {
free(server->buf);
}
free(server->recv_ctx);
free(server->send_ctx);
free(server);
}
}
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);
ev_timer_stop(EV_A_ &server->send_ctx->watcher);
ev_timer_stop(EV_A_ &server->recv_ctx->watcher);
close(server->fd);
free_server(server);
}
if (verbose) {
LOGD("current server connection: %d", server_conn);
}
}
static void accept_cb (EV_P_ ev_io *w, int revents) {
struct shadowsocks_ctx *listener = (struct shadowsocks_ctx *)w;
int serverfd = accept(listener->fd, NULL, NULL);
if (serverfd == -1) {
ERROR("accept");
return;
}
setnonblocking(serverfd);
int opt = 1;
setsockopt(serverfd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
#ifdef SO_NOSIGPIPE
setsockopt(serverfd, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt));
#endif
if (verbose) {
LOGD("accept a connection.");
}
struct server *server = new_server(serverfd, listener);
ev_io_start(EV_A_ &server->recv_ctx->io);
ev_timer_start(EV_A_ &server->recv_ctx->watcher);
}
int udprelay(char *server_host, int server_num, char *server_port,
int method, int timeout, char *iface) {
int i, c;
// inilitialize ev loop
struct ev_loop *loop = EV_DEFAULT;
// bind to each interface
while (server_num > 0) {
int index = --server_num;
const char* host = server_host[index];
// Bind to port
int serverfd = create_and_bind(host, server_port);
if (listenfd < 0) {
FATAL("bind() error..");
}
setnonblocking(serverfd);
LOGD("server listening at port %s.", server_port);
// Setup proxy context
struct shadowsocks_ctx shadowsocks_ctx;
shadowsocks_ctx.timeout = timeout;
shadowsocks_ctx.method = method;
shadowsocks_ctx.iface = iface;
struct server_ctx server_ctx;
server_ctx.asyncns = asyncns;
server_ctx.shadowsocks_ctx =
ev_io_init (&shadowsocks_ctx.io, accept_cb, listenfd, EV_READ);
ev_io_start (loop, &shadowsocks_ctx.io);
}
// start ev loop
ev_run (loop, 0);
return 0;
}

64
src/udprelay.h
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@ -0,0 +1,64 @@
#ifndef _SERVER_H
#define _SERVER_H
#include <ev.h>
#include <time.h>
#include "encrypt.h"
#include "jconf.h"
#include "asyncns.h"
struct server_ctx {
ev_io io;
ev_timer watcher;
int connected;
struct server *server;
};
struct server {
int fd;
int buf_len;
int buf_idx;
int timeout;
int method;
char *iface;
char *buf; // server send from, client recv into
struct server_ctx *recv_ctx;
struct server_ctx *send_ctx;
asyncns_query_t *query;
struct client *client;
};
struct client_ctx {
ev_io io;
struct client *client;
};
struct client {
int fd;
int buf_len;
int buf_idx;
char *buf; // client send from, server recv into
struct enc_ctx *e_ctx;
struct enc_ctx *d_ctx;
struct client_ctx *recv_ctx;
struct client_ctx *send_ctx;
struct server *server;
};
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 client_recv_cb (EV_P_ ev_io *w, int revents);
static void client_send_cb (EV_P_ ev_io *w, int revents);
static void server_timeout_cb(EV_P_ ev_timer *watcher, int revents);
static void server_resolve_cb(EV_P_ ev_timer *watcher, int revents);
struct client* new_client(int fd);
struct client *connect_to_client(struct addrinfo *res, const char *iface);
void free_client(struct client *client);
void close_and_free_client(EV_P_ struct client *client);
struct server* new_server(int fd, struct listen_ctx *listener);
void free_server(struct server *server);
void close_and_free_server(EV_P_ struct server *server);
#endif // _SERVER_H

948
src/uthash.h
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/*
Copyright (c) 2003-2013, Troy D. Hanson http://troydhanson.github.com/uthash/
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UTHASH_H
#define UTHASH_H
#include <string.h> /* memcmp,strlen */
#include <stddef.h> /* ptrdiff_t */
#include <stdlib.h> /* exit() */
/* These macros use decltype or the earlier __typeof GNU extension.
As decltype is only available in newer compilers (VS2010 or gcc 4.3+
when compiling c++ source) this code uses whatever method is needed
or, for VS2008 where neither is available, uses casting workarounds. */
#ifdef _MSC_VER /* MS compiler */
#if _MSC_VER >= 1600 && defined(__cplusplus) /* VS2010 or newer in C++ mode */
#define DECLTYPE(x) (decltype(x))
#else /* VS2008 or older (or VS2010 in C mode) */
#define NO_DECLTYPE
#define DECLTYPE(x)
#endif
#else /* GNU, Sun and other compilers */
#define DECLTYPE(x) (__typeof(x))
#endif
#ifdef NO_DECLTYPE
#define DECLTYPE_ASSIGN(dst,src) \
do { \
char **_da_dst = (char**)(&(dst)); \
*_da_dst = (char*)(src); \
} while(0)
#else
#define DECLTYPE_ASSIGN(dst,src) \
do { \
(dst) = DECLTYPE(dst)(src); \
} while(0)
#endif
/* a number of the hash function use uint32_t which isn't defined on win32 */
#ifdef _MSC_VER
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
#else
#include <inttypes.h> /* uint32_t */
#endif
#define UTHASH_VERSION 1.9.8
#ifndef uthash_fatal
#define uthash_fatal(msg) exit(-1) /* fatal error (out of memory,etc) */
#endif
#ifndef uthash_malloc
#define uthash_malloc(sz) malloc(sz) /* malloc fcn */
#endif
#ifndef uthash_free
#define uthash_free(ptr,sz) free(ptr) /* free fcn */
#endif
#ifndef uthash_noexpand_fyi
#define uthash_noexpand_fyi(tbl) /* can be defined to log noexpand */
#endif
#ifndef uthash_expand_fyi
#define uthash_expand_fyi(tbl) /* can be defined to log expands */
#endif
/* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS 32 /* initial number of buckets */
#define HASH_INITIAL_NUM_BUCKETS_LOG2 5 /* lg2 of initial number of buckets */
#define HASH_BKT_CAPACITY_THRESH 10 /* expand when bucket count reaches */
/* calculate the element whose hash handle address is hhe */
#define ELMT_FROM_HH(tbl,hhp) ((void*)(((char*)(hhp)) - ((tbl)->hho)))
#define HASH_FIND(hh,head,keyptr,keylen,out) \
do { \
unsigned _hf_bkt,_hf_hashv; \
out=NULL; \
if (head) { \
HASH_FCN(keyptr,keylen, (head)->hh.tbl->num_buckets, _hf_hashv, _hf_bkt); \
if (HASH_BLOOM_TEST((head)->hh.tbl, _hf_hashv)) { \
HASH_FIND_IN_BKT((head)->hh.tbl, hh, (head)->hh.tbl->buckets[ _hf_bkt ], \
keyptr,keylen,out); \
} \
} \
} while (0)
#ifdef HASH_BLOOM
#define HASH_BLOOM_BITLEN (1ULL << HASH_BLOOM)
#define HASH_BLOOM_BYTELEN (HASH_BLOOM_BITLEN/8) + ((HASH_BLOOM_BITLEN%8) ? 1:0)
#define HASH_BLOOM_MAKE(tbl) \
do { \
(tbl)->bloom_nbits = HASH_BLOOM; \
(tbl)->bloom_bv = (uint8_t*)uthash_malloc(HASH_BLOOM_BYTELEN); \
if (!((tbl)->bloom_bv)) { uthash_fatal( "out of memory"); } \
memset((tbl)->bloom_bv, 0, HASH_BLOOM_BYTELEN); \
(tbl)->bloom_sig = HASH_BLOOM_SIGNATURE; \
} while (0)
#define HASH_BLOOM_FREE(tbl) \
do { \
uthash_free((tbl)->bloom_bv, HASH_BLOOM_BYTELEN); \
} while (0)
#define HASH_BLOOM_BITSET(bv,idx) (bv[(idx)/8] |= (1U << ((idx)%8)))
#define HASH_BLOOM_BITTEST(bv,idx) (bv[(idx)/8] & (1U << ((idx)%8)))
#define HASH_BLOOM_ADD(tbl,hashv) \
HASH_BLOOM_BITSET((tbl)->bloom_bv, (hashv & (uint32_t)((1ULL << (tbl)->bloom_nbits) - 1)))
#define HASH_BLOOM_TEST(tbl,hashv) \
HASH_BLOOM_BITTEST((tbl)->bloom_bv, (hashv & (uint32_t)((1ULL << (tbl)->bloom_nbits) - 1)))
#else
#define HASH_BLOOM_MAKE(tbl)
#define HASH_BLOOM_FREE(tbl)
#define HASH_BLOOM_ADD(tbl,hashv)
#define HASH_BLOOM_TEST(tbl,hashv) (1)
#define HASH_BLOOM_BYTELEN 0
#endif
#define HASH_MAKE_TABLE(hh,head) \
do { \
(head)->hh.tbl = (UT_hash_table*)uthash_malloc( \
sizeof(UT_hash_table)); \
if (!((head)->hh.tbl)) { uthash_fatal( "out of memory"); } \
memset((head)->hh.tbl, 0, sizeof(UT_hash_table)); \
(head)->hh.tbl->tail = &((head)->hh); \
(head)->hh.tbl->num_buckets = HASH_INITIAL_NUM_BUCKETS; \
(head)->hh.tbl->log2_num_buckets = HASH_INITIAL_NUM_BUCKETS_LOG2; \
(head)->hh.tbl->hho = (char*)(&(head)->hh) - (char*)(head); \
(head)->hh.tbl->buckets = (UT_hash_bucket*)uthash_malloc( \
HASH_INITIAL_NUM_BUCKETS*sizeof(struct UT_hash_bucket)); \
if (! (head)->hh.tbl->buckets) { uthash_fatal( "out of memory"); } \
memset((head)->hh.tbl->buckets, 0, \
HASH_INITIAL_NUM_BUCKETS*sizeof(struct UT_hash_bucket)); \
HASH_BLOOM_MAKE((head)->hh.tbl); \
(head)->hh.tbl->signature = HASH_SIGNATURE; \
} while(0)
#define HASH_ADD(hh,head,fieldname,keylen_in,add) \
HASH_ADD_KEYPTR(hh,head,&((add)->fieldname),keylen_in,add)
#define HASH_REPLACE(hh,head,fieldname,keylen_in,add,replaced) \
do { \
replaced=NULL; \
HASH_FIND(hh,head,&((add)->fieldname),keylen_in,replaced); \
if (replaced!=NULL) { \
HASH_DELETE(hh,head,replaced); \
}; \
HASH_ADD(hh,head,fieldname,keylen_in,add); \
} while(0)
#define HASH_ADD_KEYPTR(hh,head,keyptr,keylen_in,add) \
do { \
unsigned _ha_bkt; \
(add)->hh.next = NULL; \
(add)->hh.key = (char*)keyptr; \
(add)->hh.keylen = (unsigned)keylen_in; \
if (!(head)) { \
head = (add); \
(head)->hh.prev = NULL; \
HASH_MAKE_TABLE(hh,head); \
} else { \
(head)->hh.tbl->tail->next = (add); \
(add)->hh.prev = ELMT_FROM_HH((head)->hh.tbl, (head)->hh.tbl->tail); \
(head)->hh.tbl->tail = &((add)->hh); \
} \
(head)->hh.tbl->num_items++; \
(add)->hh.tbl = (head)->hh.tbl; \
HASH_FCN(keyptr,keylen_in, (head)->hh.tbl->num_buckets, \
(add)->hh.hashv, _ha_bkt); \
HASH_ADD_TO_BKT((head)->hh.tbl->buckets[_ha_bkt],&(add)->hh); \
HASH_BLOOM_ADD((head)->hh.tbl,(add)->hh.hashv); \
HASH_EMIT_KEY(hh,head,keyptr,keylen_in); \
HASH_FSCK(hh,head); \
} while(0)
#define HASH_TO_BKT( hashv, num_bkts, bkt ) \
do { \
bkt = ((hashv) & ((num_bkts) - 1)); \
} while(0)
/* delete "delptr" from the hash table.
* "the usual" patch-up process for the app-order doubly-linked-list.
* The use of _hd_hh_del below deserves special explanation.
* These used to be expressed using (delptr) but that led to a bug
* if someone used the same symbol for the head and deletee, like
* HASH_DELETE(hh,users,users);
* We want that to work, but by changing the head (users) below
* we were forfeiting our ability to further refer to the deletee (users)
* in the patch-up process. Solution: use scratch space to
* copy the deletee pointer, then the latter references are via that
* scratch pointer rather than through the repointed (users) symbol.
*/
#define HASH_DELETE(hh,head,delptr) \
do { \
unsigned _hd_bkt; \
struct UT_hash_handle *_hd_hh_del; \
if ( ((delptr)->hh.prev == NULL) && ((delptr)->hh.next == NULL) ) { \
uthash_free((head)->hh.tbl->buckets, \
(head)->hh.tbl->num_buckets*sizeof(struct UT_hash_bucket) ); \
HASH_BLOOM_FREE((head)->hh.tbl); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
head = NULL; \
} else { \
_hd_hh_del = &((delptr)->hh); \
if ((delptr) == ELMT_FROM_HH((head)->hh.tbl,(head)->hh.tbl->tail)) { \
(head)->hh.tbl->tail = \
(UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) + \
(head)->hh.tbl->hho); \
} \
if ((delptr)->hh.prev) { \
((UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) + \
(head)->hh.tbl->hho))->next = (delptr)->hh.next; \
} else { \
DECLTYPE_ASSIGN(head,(delptr)->hh.next); \
} \
if (_hd_hh_del->next) { \
((UT_hash_handle*)((ptrdiff_t)_hd_hh_del->next + \
(head)->hh.tbl->hho))->prev = \
_hd_hh_del->prev; \
} \
HASH_TO_BKT( _hd_hh_del->hashv, (head)->hh.tbl->num_buckets, _hd_bkt); \
HASH_DEL_IN_BKT(hh,(head)->hh.tbl->buckets[_hd_bkt], _hd_hh_del); \
(head)->hh.tbl->num_items--; \
} \
HASH_FSCK(hh,head); \
} while (0)
/* convenience forms of HASH_FIND/HASH_ADD/HASH_DEL */
#define HASH_FIND_STR(head,findstr,out) \
HASH_FIND(hh,head,findstr,strlen(findstr),out)
#define HASH_ADD_STR(head,strfield,add) \
HASH_ADD(hh,head,strfield,strlen(add->strfield),add)
#define HASH_REPLACE_STR(head,strfield,add,replaced) \
HASH_REPLACE(hh,head,strfield,strlen(add->strfield),add,replaced)
#define HASH_FIND_INT(head,findint,out) \
HASH_FIND(hh,head,findint,sizeof(int),out)
#define HASH_ADD_INT(head,intfield,add) \
HASH_ADD(hh,head,intfield,sizeof(int),add)
#define HASH_REPLACE_INT(head,intfield,add,replaced) \
HASH_REPLACE(hh,head,intfield,sizeof(int),add,replaced)
#define HASH_FIND_PTR(head,findptr,out) \
HASH_FIND(hh,head,findptr,sizeof(void *),out)
#define HASH_ADD_PTR(head,ptrfield,add) \
HASH_ADD(hh,head,ptrfield,sizeof(void *),add)
#define HASH_REPLACE_PTR(head,ptrfield,add) \
HASH_REPLACE(hh,head,ptrfield,sizeof(void *),add,replaced)
#define HASH_DEL(head,delptr) \
HASH_DELETE(hh,head,delptr)
/* HASH_FSCK checks hash integrity on every add/delete when HASH_DEBUG is defined.
* This is for uthash developer only; it compiles away if HASH_DEBUG isn't defined.
*/
#ifdef HASH_DEBUG
#define HASH_OOPS(...) do { fprintf(stderr,__VA_ARGS__); exit(-1); } while (0)
#define HASH_FSCK(hh,head) \
do { \
unsigned _bkt_i; \
unsigned _count, _bkt_count; \
char *_prev; \
struct UT_hash_handle *_thh; \
if (head) { \
_count = 0; \
for( _bkt_i = 0; _bkt_i < (head)->hh.tbl->num_buckets; _bkt_i++) { \
_bkt_count = 0; \
_thh = (head)->hh.tbl->buckets[_bkt_i].hh_head; \
_prev = NULL; \
while (_thh) { \
if (_prev != (char*)(_thh->hh_prev)) { \
HASH_OOPS("invalid hh_prev %p, actual %p\n", \
_thh->hh_prev, _prev ); \
} \
_bkt_count++; \
_prev = (char*)(_thh); \
_thh = _thh->hh_next; \
} \
_count += _bkt_count; \
if ((head)->hh.tbl->buckets[_bkt_i].count != _bkt_count) { \
HASH_OOPS("invalid bucket count %d, actual %d\n", \
(head)->hh.tbl->buckets[_bkt_i].count, _bkt_count); \
} \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("invalid hh item count %d, actual %d\n", \
(head)->hh.tbl->num_items, _count ); \
} \
/* traverse hh in app order; check next/prev integrity, count */ \
_count = 0; \
_prev = NULL; \
_thh = &(head)->hh; \
while (_thh) { \
_count++; \
if (_prev !=(char*)(_thh->prev)) { \
HASH_OOPS("invalid prev %p, actual %p\n", \
_thh->prev, _prev ); \
} \
_prev = (char*)ELMT_FROM_HH((head)->hh.tbl, _thh); \
_thh = ( _thh->next ? (UT_hash_handle*)((char*)(_thh->next) + \
(head)->hh.tbl->hho) : NULL ); \
} \
if (_count != (head)->hh.tbl->num_items) { \
HASH_OOPS("invalid app item count %d, actual %d\n", \
(head)->hh.tbl->num_items, _count ); \
} \
} \
} while (0)
#else
#define HASH_FSCK(hh,head)
#endif
/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to
* the descriptor to which this macro is defined for tuning the hash function.
* The app can #include <unistd.h> to get the prototype for write(2). */
#ifdef HASH_EMIT_KEYS
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen) \
do { \
unsigned _klen = fieldlen; \
write(HASH_EMIT_KEYS, &_klen, sizeof(_klen)); \
write(HASH_EMIT_KEYS, keyptr, fieldlen); \
} while (0)
#else
#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)
#endif
/* default to Jenkin's hash unless overridden e.g. DHASH_FUNCTION=HASH_SAX */
#ifdef HASH_FUNCTION
#define HASH_FCN HASH_FUNCTION
#else
#define HASH_FCN HASH_JEN
#endif
/* The Bernstein hash function, used in Perl prior to v5.6 */
#define HASH_BER(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned _hb_keylen=keylen; \
char *_hb_key=(char*)(key); \
(hashv) = 0; \
while (_hb_keylen--) { (hashv) = ((hashv) * 33) + *_hb_key++; } \
bkt = (hashv) & (num_bkts-1); \
} while (0)
/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at
* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx */
#define HASH_SAX(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned _sx_i; \
char *_hs_key=(char*)(key); \
hashv = 0; \
for(_sx_i=0; _sx_i < keylen; _sx_i++) \
hashv ^= (hashv << 5) + (hashv >> 2) + _hs_key[_sx_i]; \
bkt = hashv & (num_bkts-1); \
} while (0)
#define HASH_FNV(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned _fn_i; \
char *_hf_key=(char*)(key); \
hashv = 2166136261UL; \
for(_fn_i=0; _fn_i < keylen; _fn_i++) \
hashv = (hashv * 16777619) ^ _hf_key[_fn_i]; \
bkt = hashv & (num_bkts-1); \
} while(0)
#define HASH_OAT(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned _ho_i; \
char *_ho_key=(char*)(key); \
hashv = 0; \
for(_ho_i=0; _ho_i < keylen; _ho_i++) { \
hashv += _ho_key[_ho_i]; \
hashv += (hashv << 10); \
hashv ^= (hashv >> 6); \
} \
hashv += (hashv << 3); \
hashv ^= (hashv >> 11); \
hashv += (hashv << 15); \
bkt = hashv & (num_bkts-1); \
} while(0)
#define HASH_JEN_MIX(a,b,c) \
do { \
a -= b; a -= c; a ^= ( c >> 13 ); \
b -= c; b -= a; b ^= ( a << 8 ); \
c -= a; c -= b; c ^= ( b >> 13 ); \
a -= b; a -= c; a ^= ( c >> 12 ); \
b -= c; b -= a; b ^= ( a << 16 ); \
c -= a; c -= b; c ^= ( b >> 5 ); \
a -= b; a -= c; a ^= ( c >> 3 ); \
b -= c; b -= a; b ^= ( a << 10 ); \
c -= a; c -= b; c ^= ( b >> 15 ); \
} while (0)
#define HASH_JEN(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned _hj_i,_hj_j,_hj_k; \
unsigned char *_hj_key=(unsigned char*)(key); \
hashv = 0xfeedbeef; \
_hj_i = _hj_j = 0x9e3779b9; \
_hj_k = (unsigned)keylen; \
while (_hj_k >= 12) { \
_hj_i += (_hj_key[0] + ( (unsigned)_hj_key[1] << 8 ) \
+ ( (unsigned)_hj_key[2] << 16 ) \
+ ( (unsigned)_hj_key[3] << 24 ) ); \
_hj_j += (_hj_key[4] + ( (unsigned)_hj_key[5] << 8 ) \
+ ( (unsigned)_hj_key[6] << 16 ) \
+ ( (unsigned)_hj_key[7] << 24 ) ); \
hashv += (_hj_key[8] + ( (unsigned)_hj_key[9] << 8 ) \
+ ( (unsigned)_hj_key[10] << 16 ) \
+ ( (unsigned)_hj_key[11] << 24 ) ); \
\
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
\
_hj_key += 12; \
_hj_k -= 12; \
} \
hashv += keylen; \
switch ( _hj_k ) { \
case 11: hashv += ( (unsigned)_hj_key[10] << 24 ); \
case 10: hashv += ( (unsigned)_hj_key[9] << 16 ); \
case 9: hashv += ( (unsigned)_hj_key[8] << 8 ); \
case 8: _hj_j += ( (unsigned)_hj_key[7] << 24 ); \
case 7: _hj_j += ( (unsigned)_hj_key[6] << 16 ); \
case 6: _hj_j += ( (unsigned)_hj_key[5] << 8 ); \
case 5: _hj_j += _hj_key[4]; \
case 4: _hj_i += ( (unsigned)_hj_key[3] << 24 ); \
case 3: _hj_i += ( (unsigned)_hj_key[2] << 16 ); \
case 2: _hj_i += ( (unsigned)_hj_key[1] << 8 ); \
case 1: _hj_i += _hj_key[0]; \
} \
HASH_JEN_MIX(_hj_i, _hj_j, hashv); \
bkt = hashv & (num_bkts-1); \
} while(0)
/* The Paul Hsieh hash function */
#undef get16bits
#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
|| defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
#define get16bits(d) (*((const uint16_t *) (d)))
#endif
#if !defined (get16bits)
#define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8) \
+(uint32_t)(((const uint8_t *)(d))[0]) )
#endif
#define HASH_SFH(key,keylen,num_bkts,hashv,bkt) \
do { \
unsigned char *_sfh_key=(unsigned char*)(key); \
uint32_t _sfh_tmp, _sfh_len = keylen; \
\
int _sfh_rem = _sfh_len & 3; \
_sfh_len >>= 2; \
hashv = 0xcafebabe; \
\
/* Main loop */ \
for (;_sfh_len > 0; _sfh_len--) { \
hashv += get16bits (_sfh_key); \
_sfh_tmp = (uint32_t)(get16bits (_sfh_key+2)) << 11 ^ hashv; \
hashv = (hashv << 16) ^ _sfh_tmp; \
_sfh_key += 2*sizeof (uint16_t); \
hashv += hashv >> 11; \
} \
\
/* Handle end cases */ \
switch (_sfh_rem) { \
case 3: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 16; \
hashv ^= (uint32_t)(_sfh_key[sizeof (uint16_t)] << 18); \
hashv += hashv >> 11; \
break; \
case 2: hashv += get16bits (_sfh_key); \
hashv ^= hashv << 11; \
hashv += hashv >> 17; \
break; \
case 1: hashv += *_sfh_key; \
hashv ^= hashv << 10; \
hashv += hashv >> 1; \
} \
\
/* Force "avalanching" of final 127 bits */ \
hashv ^= hashv << 3; \
hashv += hashv >> 5; \
hashv ^= hashv << 4; \
hashv += hashv >> 17; \
hashv ^= hashv << 25; \
hashv += hashv >> 6; \
bkt = hashv & (num_bkts-1); \
} while(0)
#ifdef HASH_USING_NO_STRICT_ALIASING
/* The MurmurHash exploits some CPU's (x86,x86_64) tolerance for unaligned reads.
* For other types of CPU's (e.g. Sparc) an unaligned read causes a bus error.
* MurmurHash uses the faster approach only on CPU's where we know it's safe.
*
* Note the preprocessor built-in defines can be emitted using:
*
* gcc -m64 -dM -E - < /dev/null (on gcc)
* cc -## a.c (where a.c is a simple test file) (Sun Studio)
*/
#if (defined(__i386__) || defined(__x86_64__) || defined(_M_IX86))
#define MUR_GETBLOCK(p,i) p[i]
#else /* non intel */
#define MUR_PLUS0_ALIGNED(p) (((unsigned long)p & 0x3) == 0)
#define MUR_PLUS1_ALIGNED(p) (((unsigned long)p & 0x3) == 1)
#define MUR_PLUS2_ALIGNED(p) (((unsigned long)p & 0x3) == 2)
#define MUR_PLUS3_ALIGNED(p) (((unsigned long)p & 0x3) == 3)
#define WP(p) ((uint32_t*)((unsigned long)(p) & ~3UL))
#if (defined(__BIG_ENDIAN__) || defined(SPARC) || defined(__ppc__) || defined(__ppc64__))
#define MUR_THREE_ONE(p) ((((*WP(p))&0x00ffffff) << 8) | (((*(WP(p)+1))&0xff000000) >> 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0x0000ffff) <<16) | (((*(WP(p)+1))&0xffff0000) >> 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0x000000ff) <<24) | (((*(WP(p)+1))&0xffffff00) >> 8))
#else /* assume little endian non-intel */
#define MUR_THREE_ONE(p) ((((*WP(p))&0xffffff00) >> 8) | (((*(WP(p)+1))&0x000000ff) << 24))
#define MUR_TWO_TWO(p) ((((*WP(p))&0xffff0000) >>16) | (((*(WP(p)+1))&0x0000ffff) << 16))
#define MUR_ONE_THREE(p) ((((*WP(p))&0xff000000) >>24) | (((*(WP(p)+1))&0x00ffffff) << 8))
#endif
#define MUR_GETBLOCK(p,i) (MUR_PLUS0_ALIGNED(p) ? ((p)[i]) : \
(MUR_PLUS1_ALIGNED(p) ? MUR_THREE_ONE(p) : \
(MUR_PLUS2_ALIGNED(p) ? MUR_TWO_TWO(p) : \
MUR_ONE_THREE(p))))
#endif
#define MUR_ROTL32(x,r) (((x) << (r)) | ((x) >> (32 - (r))))
#define MUR_FMIX(_h) \
do { \
_h ^= _h >> 16; \
_h *= 0x85ebca6b; \
_h ^= _h >> 13; \
_h *= 0xc2b2ae35l; \
_h ^= _h >> 16; \
} while(0)
#define HASH_MUR(key,keylen,num_bkts,hashv,bkt) \
do { \
const uint8_t *_mur_data = (const uint8_t*)(key); \
const int _mur_nblocks = (keylen) / 4; \
uint32_t _mur_h1 = 0xf88D5353; \
uint32_t _mur_c1 = 0xcc9e2d51; \
uint32_t _mur_c2 = 0x1b873593; \
uint32_t _mur_k1 = 0; \
const uint8_t *_mur_tail; \
const uint32_t *_mur_blocks = (const uint32_t*)(_mur_data+_mur_nblocks*4); \
int _mur_i; \
for(_mur_i = -_mur_nblocks; _mur_i; _mur_i++) { \
_mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i); \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
\
_mur_h1 ^= _mur_k1; \
_mur_h1 = MUR_ROTL32(_mur_h1,13); \
_mur_h1 = _mur_h1*5+0xe6546b64; \
} \
_mur_tail = (const uint8_t*)(_mur_data + _mur_nblocks*4); \
_mur_k1=0; \
switch((keylen) & 3) { \
case 3: _mur_k1 ^= _mur_tail[2] << 16; \
case 2: _mur_k1 ^= _mur_tail[1] << 8; \
case 1: _mur_k1 ^= _mur_tail[0]; \
_mur_k1 *= _mur_c1; \
_mur_k1 = MUR_ROTL32(_mur_k1,15); \
_mur_k1 *= _mur_c2; \
_mur_h1 ^= _mur_k1; \
} \
_mur_h1 ^= (keylen); \
MUR_FMIX(_mur_h1); \
hashv = _mur_h1; \
bkt = hashv & (num_bkts-1); \
} while(0)
#endif /* HASH_USING_NO_STRICT_ALIASING */
/* key comparison function; return 0 if keys equal */
#define HASH_KEYCMP(a,b,len) memcmp(a,b,len)
/* iterate over items in a known bucket to find desired item */
#define HASH_FIND_IN_BKT(tbl,hh,head,keyptr,keylen_in,out) \
do { \
if (head.hh_head) DECLTYPE_ASSIGN(out,ELMT_FROM_HH(tbl,head.hh_head)); \
else out=NULL; \
while (out) { \
if ((out)->hh.keylen == keylen_in) { \
if ((HASH_KEYCMP((out)->hh.key,keyptr,keylen_in)) == 0) break; \
} \
if ((out)->hh.hh_next) DECLTYPE_ASSIGN(out,ELMT_FROM_HH(tbl,(out)->hh.hh_next)); \
else out = NULL; \
} \
} while(0)
/* add an item to a bucket */
#define HASH_ADD_TO_BKT(head,addhh) \
do { \
head.count++; \
(addhh)->hh_next = head.hh_head; \
(addhh)->hh_prev = NULL; \
if (head.hh_head) { (head).hh_head->hh_prev = (addhh); } \
(head).hh_head=addhh; \
if (head.count >= ((head.expand_mult+1) * HASH_BKT_CAPACITY_THRESH) \
&& (addhh)->tbl->noexpand != 1) { \
HASH_EXPAND_BUCKETS((addhh)->tbl); \
} \
} while(0)
/* remove an item from a given bucket */
#define HASH_DEL_IN_BKT(hh,head,hh_del) \
(head).count--; \
if ((head).hh_head == hh_del) { \
(head).hh_head = hh_del->hh_next; \
} \
if (hh_del->hh_prev) { \
hh_del->hh_prev->hh_next = hh_del->hh_next; \
} \
if (hh_del->hh_next) { \
hh_del->hh_next->hh_prev = hh_del->hh_prev; \
}
/* Bucket expansion has the effect of doubling the number of buckets
* and redistributing the items into the new buckets. Ideally the
* items will distribute more or less evenly into the new buckets
* (the extent to which this is true is a measure of the quality of
* the hash function as it applies to the key domain).
*
* With the items distributed into more buckets, the chain length
* (item count) in each bucket is reduced. Thus by expanding buckets
* the hash keeps a bound on the chain length. This bounded chain
* length is the essence of how a hash provides constant time lookup.
*
* The calculation of tbl->ideal_chain_maxlen below deserves some
* explanation. First, keep in mind that we're calculating the ideal
* maximum chain length based on the *new* (doubled) bucket count.
* In fractions this is just n/b (n=number of items,b=new num buckets).
* Since the ideal chain length is an integer, we want to calculate
* ceil(n/b). We don't depend on floating point arithmetic in this
* hash, so to calculate ceil(n/b) with integers we could write
*
* ceil(n/b) = (n/b) + ((n%b)?1:0)
*
* and in fact a previous version of this hash did just that.
* But now we have improved things a bit by recognizing that b is
* always a power of two. We keep its base 2 log handy (call it lb),
* so now we can write this with a bit shift and logical AND:
*
* ceil(n/b) = (n>>lb) + ( (n & (b-1)) ? 1:0)
*
*/
#define HASH_EXPAND_BUCKETS(tbl) \
do { \
unsigned _he_bkt; \
unsigned _he_bkt_i; \
struct UT_hash_handle *_he_thh, *_he_hh_nxt; \
UT_hash_bucket *_he_new_buckets, *_he_newbkt; \
_he_new_buckets = (UT_hash_bucket*)uthash_malloc( \
2 * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
if (!_he_new_buckets) { uthash_fatal( "out of memory"); } \
memset(_he_new_buckets, 0, \
2 * tbl->num_buckets * sizeof(struct UT_hash_bucket)); \
tbl->ideal_chain_maxlen = \
(tbl->num_items >> (tbl->log2_num_buckets+1)) + \
((tbl->num_items & ((tbl->num_buckets*2)-1)) ? 1 : 0); \
tbl->nonideal_items = 0; \
for(_he_bkt_i = 0; _he_bkt_i < tbl->num_buckets; _he_bkt_i++) \
{ \
_he_thh = tbl->buckets[ _he_bkt_i ].hh_head; \
while (_he_thh) { \
_he_hh_nxt = _he_thh->hh_next; \
HASH_TO_BKT( _he_thh->hashv, tbl->num_buckets*2, _he_bkt); \
_he_newbkt = &(_he_new_buckets[ _he_bkt ]); \
if (++(_he_newbkt->count) > tbl->ideal_chain_maxlen) { \
tbl->nonideal_items++; \
_he_newbkt->expand_mult = _he_newbkt->count / \
tbl->ideal_chain_maxlen; \
} \
_he_thh->hh_prev = NULL; \
_he_thh->hh_next = _he_newbkt->hh_head; \
if (_he_newbkt->hh_head) _he_newbkt->hh_head->hh_prev = \
_he_thh; \
_he_newbkt->hh_head = _he_thh; \
_he_thh = _he_hh_nxt; \
} \
} \
uthash_free( tbl->buckets, tbl->num_buckets*sizeof(struct UT_hash_bucket) ); \
tbl->num_buckets *= 2; \
tbl->log2_num_buckets++; \
tbl->buckets = _he_new_buckets; \
tbl->ineff_expands = (tbl->nonideal_items > (tbl->num_items >> 1)) ? \
(tbl->ineff_expands+1) : 0; \
if (tbl->ineff_expands > 1) { \
tbl->noexpand=1; \
uthash_noexpand_fyi(tbl); \
} \
uthash_expand_fyi(tbl); \
} while(0)
/* This is an adaptation of Simon Tatham's O(n log(n)) mergesort */
/* Note that HASH_SORT assumes the hash handle name to be hh.
* HASH_SRT was added to allow the hash handle name to be passed in. */
#define HASH_SORT(head,cmpfcn) HASH_SRT(hh,head,cmpfcn)
#define HASH_SRT(hh,head,cmpfcn) \
do { \
unsigned _hs_i; \
unsigned _hs_looping,_hs_nmerges,_hs_insize,_hs_psize,_hs_qsize; \
struct UT_hash_handle *_hs_p, *_hs_q, *_hs_e, *_hs_list, *_hs_tail; \
if (head) { \
_hs_insize = 1; \
_hs_looping = 1; \
_hs_list = &((head)->hh); \
while (_hs_looping) { \
_hs_p = _hs_list; \
_hs_list = NULL; \
_hs_tail = NULL; \
_hs_nmerges = 0; \
while (_hs_p) { \
_hs_nmerges++; \
_hs_q = _hs_p; \
_hs_psize = 0; \
for ( _hs_i = 0; _hs_i < _hs_insize; _hs_i++ ) { \
_hs_psize++; \
_hs_q = (UT_hash_handle*)((_hs_q->next) ? \
((void*)((char*)(_hs_q->next) + \
(head)->hh.tbl->hho)) : NULL); \
if (! (_hs_q) ) break; \
} \
_hs_qsize = _hs_insize; \
while ((_hs_psize > 0) || ((_hs_qsize > 0) && _hs_q )) { \
if (_hs_psize == 0) { \
_hs_e = _hs_q; \
_hs_q = (UT_hash_handle*)((_hs_q->next) ? \
((void*)((char*)(_hs_q->next) + \
(head)->hh.tbl->hho)) : NULL); \
_hs_qsize--; \
} else if ( (_hs_qsize == 0) || !(_hs_q) ) { \
_hs_e = _hs_p; \
if (_hs_p){ \
_hs_p = (UT_hash_handle*)((_hs_p->next) ? \
((void*)((char*)(_hs_p->next) + \
(head)->hh.tbl->hho)) : NULL); \
} \
_hs_psize--; \
} else if (( \
cmpfcn(DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_p)), \
DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_q))) \
) <= 0) { \
_hs_e = _hs_p; \
if (_hs_p){ \
_hs_p = (UT_hash_handle*)((_hs_p->next) ? \
((void*)((char*)(_hs_p->next) + \
(head)->hh.tbl->hho)) : NULL); \
} \
_hs_psize--; \
} else { \
_hs_e = _hs_q; \
_hs_q = (UT_hash_handle*)((_hs_q->next) ? \
((void*)((char*)(_hs_q->next) + \
(head)->hh.tbl->hho)) : NULL); \
_hs_qsize--; \
} \
if ( _hs_tail ) { \
_hs_tail->next = ((_hs_e) ? \
ELMT_FROM_HH((head)->hh.tbl,_hs_e) : NULL); \
} else { \
_hs_list = _hs_e; \
} \
if (_hs_e) { \
_hs_e->prev = ((_hs_tail) ? \
ELMT_FROM_HH((head)->hh.tbl,_hs_tail) : NULL); \
} \
_hs_tail = _hs_e; \
} \
_hs_p = _hs_q; \
} \
if (_hs_tail){ \
_hs_tail->next = NULL; \
} \
if ( _hs_nmerges <= 1 ) { \
_hs_looping=0; \
(head)->hh.tbl->tail = _hs_tail; \
DECLTYPE_ASSIGN(head,ELMT_FROM_HH((head)->hh.tbl, _hs_list)); \
} \
_hs_insize *= 2; \
} \
HASH_FSCK(hh,head); \
} \
} while (0)
/* This function selects items from one hash into another hash.
* The end result is that the selected items have dual presence
* in both hashes. There is no copy of the items made; rather
* they are added into the new hash through a secondary hash
* hash handle that must be present in the structure. */
#define HASH_SELECT(hh_dst, dst, hh_src, src, cond) \
do { \
unsigned _src_bkt, _dst_bkt; \
void *_last_elt=NULL, *_elt; \
UT_hash_handle *_src_hh, *_dst_hh, *_last_elt_hh=NULL; \
ptrdiff_t _dst_hho = ((char*)(&(dst)->hh_dst) - (char*)(dst)); \
if (src) { \
for(_src_bkt=0; _src_bkt < (src)->hh_src.tbl->num_buckets; _src_bkt++) { \
for(_src_hh = (src)->hh_src.tbl->buckets[_src_bkt].hh_head; \
_src_hh; \
_src_hh = _src_hh->hh_next) { \
_elt = ELMT_FROM_HH((src)->hh_src.tbl, _src_hh); \
if (cond(_elt)) { \
_dst_hh = (UT_hash_handle*)(((char*)_elt) + _dst_hho); \
_dst_hh->key = _src_hh->key; \
_dst_hh->keylen = _src_hh->keylen; \
_dst_hh->hashv = _src_hh->hashv; \
_dst_hh->prev = _last_elt; \
_dst_hh->next = NULL; \
if (_last_elt_hh) { _last_elt_hh->next = _elt; } \
if (!dst) { \
DECLTYPE_ASSIGN(dst,_elt); \
HASH_MAKE_TABLE(hh_dst,dst); \
} else { \
_dst_hh->tbl = (dst)->hh_dst.tbl; \
} \
HASH_TO_BKT(_dst_hh->hashv, _dst_hh->tbl->num_buckets, _dst_bkt); \
HASH_ADD_TO_BKT(_dst_hh->tbl->buckets[_dst_bkt],_dst_hh); \
(dst)->hh_dst.tbl->num_items++; \
_last_elt = _elt; \
_last_elt_hh = _dst_hh; \
} \
} \
} \
} \
HASH_FSCK(hh_dst,dst); \
} while (0)
#define HASH_CLEAR(hh,head) \
do { \
if (head) { \
uthash_free((head)->hh.tbl->buckets, \
(head)->hh.tbl->num_buckets*sizeof(struct UT_hash_bucket)); \
HASH_BLOOM_FREE((head)->hh.tbl); \
uthash_free((head)->hh.tbl, sizeof(UT_hash_table)); \
(head)=NULL; \
} \
} while(0)
#define HASH_OVERHEAD(hh,head) \
(size_t)((((head)->hh.tbl->num_items * sizeof(UT_hash_handle)) + \
((head)->hh.tbl->num_buckets * sizeof(UT_hash_bucket)) + \
(sizeof(UT_hash_table)) + \
(HASH_BLOOM_BYTELEN)))
#ifdef NO_DECLTYPE
#define HASH_ITER(hh,head,el,tmp) \
for((el)=(head), (*(char**)(&(tmp)))=(char*)((head)?(head)->hh.next:NULL); \
el; (el)=(tmp),(*(char**)(&(tmp)))=(char*)((tmp)?(tmp)->hh.next:NULL))
#else
#define HASH_ITER(hh,head,el,tmp) \
for((el)=(head),(tmp)=DECLTYPE(el)((head)?(head)->hh.next:NULL); \
el; (el)=(tmp),(tmp)=DECLTYPE(el)((tmp)?(tmp)->hh.next:NULL))
#endif
/* obtain a count of items in the hash */
#define HASH_COUNT(head) HASH_CNT(hh,head)
#define HASH_CNT(hh,head) ((head)?((head)->hh.tbl->num_items):0)
typedef struct UT_hash_bucket {
struct UT_hash_handle *hh_head;
unsigned count;
/* expand_mult is normally set to 0. In this situation, the max chain length
* threshold is enforced at its default value, HASH_BKT_CAPACITY_THRESH. (If
* the bucket's chain exceeds this length, bucket expansion is triggered).
* However, setting expand_mult to a non-zero value delays bucket expansion
* (that would be triggered by additions to this particular bucket)
* until its chain length reaches a *multiple* of HASH_BKT_CAPACITY_THRESH.
* (The multiplier is simply expand_mult+1). The whole idea of this
* multiplier is to reduce bucket expansions, since they are expensive, in
* situations where we know that a particular bucket tends to be overused.
* It is better to let its chain length grow to a longer yet-still-bounded
* value, than to do an O(n) bucket expansion too often.
*/
unsigned expand_mult;
} UT_hash_bucket;
/* random signature used only to find hash tables in external analysis */
#define HASH_SIGNATURE 0xa0111fe1
#define HASH_BLOOM_SIGNATURE 0xb12220f2
typedef struct UT_hash_table {
UT_hash_bucket *buckets;
unsigned num_buckets, log2_num_buckets;
unsigned num_items;
struct UT_hash_handle *tail; /* tail hh in app order, for fast append */
ptrdiff_t hho; /* hash handle offset (byte pos of hash handle in element */
/* in an ideal situation (all buckets used equally), no bucket would have
* more than ceil(#items/#buckets) items. that's the ideal chain length. */
unsigned ideal_chain_maxlen;
/* nonideal_items is the number of items in the hash whose chain position
* exceeds the ideal chain maxlen. these items pay the penalty for an uneven
* hash distribution; reaching them in a chain traversal takes >ideal steps */
unsigned nonideal_items;
/* ineffective expands occur when a bucket doubling was performed, but
* afterward, more than half the items in the hash had nonideal chain
* positions. If this happens on two consecutive expansions we inhibit any
* further expansion, as it's not helping; this happens when the hash
* function isn't a good fit for the key domain. When expansion is inhibited
* the hash will still work, albeit no longer in constant time. */
unsigned ineff_expands, noexpand;
uint32_t signature; /* used only to find hash tables in external analysis */
#ifdef HASH_BLOOM
uint32_t bloom_sig; /* used only to test bloom exists in external analysis */
uint8_t *bloom_bv;
char bloom_nbits;
#endif
} UT_hash_table;
typedef struct UT_hash_handle {
struct UT_hash_table *tbl;
void *prev; /* prev element in app order */
void *next; /* next element in app order */
struct UT_hash_handle *hh_prev; /* previous hh in bucket order */
struct UT_hash_handle *hh_next; /* next hh in bucket order */
void *key; /* ptr to enclosing struct's key */
unsigned keylen; /* enclosing struct's key len */
unsigned hashv; /* result of hash-fcn(key) */
} UT_hash_handle;
#endif /* UTHASH_H */
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