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/*
* Copyright 2011-2012 Con Kolivas
* Copyright 2010 Jeff Garzik
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
#define _GNU_SOURCE
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <string.h>
#include <jansson.h>
#include <curl/curl.h>
#include <time.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#ifndef WIN32
# include <sys/socket.h>
# include <netinet/in.h>
# include <netinet/tcp.h>
#else
# include <winsock2.h>
# include <mstcpip.h>
#endif
#include "miner.h"
#include "elist.h"
#include "compat.h"
#if JANSSON_MAJOR_VERSION >= 2
#define JSON_LOADS(str, err_ptr) json_loads((str), 0, (err_ptr))
#else
#define JSON_LOADS(str, err_ptr) json_loads((str), (err_ptr))
#endif
bool successful_connect = false;
struct timeval nettime;
struct data_buffer {
void *buf;
size_t len;
};
struct upload_buffer {
const void *buf;
size_t len;
};
struct header_info {
char *lp_path;
bool has_rolltime;
char *reason;
};
struct tq_ent {
void *data;
struct list_head q_node;
};
static void databuf_free(struct data_buffer *db)
{
if (!db)
return;
free(db->buf);
memset(db, 0, sizeof(*db));
}
static size_t all_data_cb(const void *ptr, size_t size, size_t nmemb,
void *user_data)
{
struct data_buffer *db = user_data;
size_t len = size * nmemb;
size_t oldlen, newlen;
void *newmem;
static const unsigned char zero = 0;
oldlen = db->len;
newlen = oldlen + len;
newmem = realloc(db->buf, newlen + 1);
if (!newmem)
return 0;
db->buf = newmem;
db->len = newlen;
memcpy(db->buf + oldlen, ptr, len);
memcpy(db->buf + newlen, &zero, 1); /* null terminate */
return len;
}
static size_t upload_data_cb(void *ptr, size_t size, size_t nmemb,
void *user_data)
{
struct upload_buffer *ub = user_data;
unsigned int len = size * nmemb;
if (len > ub->len)
len = ub->len;
if (len) {
memcpy(ptr, ub->buf, len);
ub->buf += len;
ub->len -= len;
}
return len;
}
static size_t resp_hdr_cb(void *ptr, size_t size, size_t nmemb, void *user_data)
{
struct header_info *hi = user_data;
size_t remlen, slen, ptrlen = size * nmemb;
char *rem, *val = NULL, *key = NULL;
void *tmp;
val = calloc(1, ptrlen);
key = calloc(1, ptrlen);
if (!key || !val)
goto out;
tmp = memchr(ptr, ':', ptrlen);
if (!tmp || (tmp == ptr)) /* skip empty keys / blanks */
goto out;
slen = tmp - ptr;
if ((slen + 1) == ptrlen) /* skip key w/ no value */
goto out;
memcpy(key, ptr, slen); /* store & nul term key */
key[slen] = 0;
rem = ptr + slen + 1; /* trim value's leading whitespace */
remlen = ptrlen - slen - 1;
while ((remlen > 0) && (isspace(*rem))) {
remlen--;
rem++;
}
memcpy(val, rem, remlen); /* store value, trim trailing ws */
val[remlen] = 0;
while ((*val) && (isspace(val[strlen(val) - 1]))) {
val[strlen(val) - 1] = 0;
}
if (!*val) /* skip blank value */
goto out;
if (opt_protocol)
applog(LOG_DEBUG, "HTTP hdr(%s): %s", key, val);
if (!strcasecmp("X-Roll-Ntime", key)) {
if (!strncasecmp("N", val, 1)) {
applog(LOG_DEBUG, "X-Roll-Ntime: N found");
} else {
applog(LOG_DEBUG, "X-Roll-Ntime found");
hi->has_rolltime = true;
}
}
if (!strcasecmp("X-Long-Polling", key)) {
hi->lp_path = val; /* steal memory reference */
val = NULL;
}
if (!strcasecmp("X-Reject-Reason", key)) {
hi->reason = val; /* steal memory reference */
val = NULL;
}
out:
free(key);
free(val);
return ptrlen;
}
#ifdef CURL_HAS_SOCKOPT
int json_rpc_call_sockopt_cb(void __maybe_unused *userdata, curl_socket_t fd,
curlsocktype __maybe_unused purpose)
{
int tcp_keepidle = 120;
int tcp_keepintvl = 120;
#ifndef WIN32
int keepalive = 1;
int tcp_keepcnt = 5;
if (unlikely(setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &keepalive, sizeof(keepalive))))
return 1;
# ifdef __linux
if (unlikely(setsockopt(fd, SOL_TCP, TCP_KEEPCNT, &tcp_keepcnt, sizeof(tcp_keepcnt))))
return 1;
if (unlikely(setsockopt(fd, SOL_TCP, TCP_KEEPIDLE, &tcp_keepidle, sizeof(tcp_keepidle))))
return 1;
if (unlikely(setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &tcp_keepintvl, sizeof(tcp_keepintvl))))
return 1;
# endif /* __linux */
# ifdef __APPLE_CC__
if (unlikely(setsockopt(fd, IPPROTO_TCP, TCP_KEEPALIVE, &tcp_keepintvl, sizeof(tcp_keepintvl))))
return 1;
# endif /* __APPLE_CC__ */
#else /* WIN32 */
struct tcp_keepalive vals;
vals.onoff = 1;
vals.keepalivetime = tcp_keepidle * 1000;
vals.keepaliveinterval = tcp_keepintvl * 1000;
DWORD outputBytes;
if (unlikely(WSAIoctl(fd, SIO_KEEPALIVE_VALS, &vals, sizeof(vals), NULL, 0, &outputBytes, NULL, NULL)))
return 1;
#endif /* WIN32 */
return 0;
}
#endif
static void last_nettime(struct timeval *last)
{
rd_lock(&netacc_lock);
last->tv_sec = nettime.tv_sec;
last->tv_usec = nettime.tv_usec;
rd_unlock(&netacc_lock);
}
static void set_nettime(void)
{
wr_lock(&netacc_lock);
gettimeofday(&nettime, NULL);
wr_unlock(&netacc_lock);
}
json_t *json_rpc_call(CURL *curl, const char *url,
const char *userpass, const char *rpc_req,
bool probe, bool longpoll, bool *rolltime,
struct pool *pool, bool share)
{
json_t *val, *err_val, *res_val;
int rc;
struct data_buffer all_data = {NULL, 0};
struct upload_buffer upload_data;
json_error_t err;
struct curl_slist *headers = NULL;
char len_hdr[64], user_agent_hdr[128];
char curl_err_str[CURL_ERROR_SIZE];
long timeout = longpoll ? (60 * 60) : 60;
struct header_info hi = {NULL, false, NULL};
bool probing = false;
memset(&err, 0, sizeof(err));
/* it is assumed that 'curl' is freshly [re]initialized at this pt */
if (probe)
probing = !pool->probed;
curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
#if 0 /* Disable curl debugging since it spews to stderr */
if (opt_protocol)
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
#endif
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_ENCODING, "");
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
/* Shares are staggered already and delays in submission can be costly
* so do not delay them */
if (!opt_delaynet || share)
curl_easy_setopt(curl, CURLOPT_TCP_NODELAY, 1);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, all_data_cb);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &all_data);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, upload_data_cb);
curl_easy_setopt(curl, CURLOPT_READDATA, &upload_data);
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_err_str);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, resp_hdr_cb);
curl_easy_setopt(curl, CURLOPT_HEADERDATA, &hi);
curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_TRY);
if (opt_socks_proxy) {
curl_easy_setopt(curl, CURLOPT_PROXY, opt_socks_proxy);
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4);
}
if (userpass) {
curl_easy_setopt(curl, CURLOPT_USERPWD, userpass);
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
}
#ifdef CURL_HAS_SOCKOPT
if (longpoll)
curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, json_rpc_call_sockopt_cb);
#endif
curl_easy_setopt(curl, CURLOPT_POST, 1);
if (opt_protocol)
applog(LOG_DEBUG, "JSON protocol request:\n%s", rpc_req);
upload_data.buf = rpc_req;
upload_data.len = strlen(rpc_req);
sprintf(len_hdr, "Content-Length: %lu",
(unsigned long) upload_data.len);
sprintf(user_agent_hdr, "User-Agent: %s", PACKAGE_STRING);
headers = curl_slist_append(headers,
"Content-type: application/json");
headers = curl_slist_append(headers,
"X-Mining-Extensions: longpoll midstate rollntime submitold");
headers = curl_slist_append(headers, len_hdr);
headers = curl_slist_append(headers, user_agent_hdr);
headers = curl_slist_append(headers, "Expect:"); /* disable Expect hdr*/
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
if (opt_delaynet) {
/* Don't delay share submission, but still track the nettime */
if (!share) {
long long now_msecs, last_msecs;
struct timeval now, last;
gettimeofday(&now, NULL);
last_nettime(&last);
now_msecs = (long long)now.tv_sec * 1000;
now_msecs += now.tv_usec / 1000;
last_msecs = (long long)last.tv_sec * 1000;
last_msecs += last.tv_usec / 1000;
if (now_msecs > last_msecs && now_msecs - last_msecs < 250) {
struct timespec rgtp;
rgtp.tv_sec = 0;
rgtp.tv_nsec = (250 - (now_msecs - last_msecs)) * 1000000;
nanosleep(&rgtp, NULL);
}
}
set_nettime();
}
rc = curl_easy_perform(curl);
if (rc) {
applog(LOG_INFO, "HTTP request failed: %s", curl_err_str);
goto err_out;
}
if (!all_data.buf) {
applog(LOG_DEBUG, "Empty data received in json_rpc_call.");
goto err_out;
}
if (probing) {
pool->probed = true;
/* If X-Long-Polling was found, activate long polling */
if (hi.lp_path) {
if (pool->hdr_path != NULL)
free(pool->hdr_path);
pool->hdr_path = hi.lp_path;
} else {
pool->hdr_path = NULL;
}
} else if (hi.lp_path) {
free(hi.lp_path);
hi.lp_path = NULL;
}
*rolltime = hi.has_rolltime;
val = JSON_LOADS(all_data.buf, &err);
if (!val) {
applog(LOG_INFO, "JSON decode failed(%d): %s", err.line, err.text);
if (opt_protocol)
applog(LOG_DEBUG, "JSON protocol response:\n%s", all_data.buf);
goto err_out;
}
if (opt_protocol) {
char *s = json_dumps(val, JSON_INDENT(3));
applog(LOG_DEBUG, "JSON protocol response:\n%s", s);
free(s);
}
/* JSON-RPC valid response returns a non-null 'result',
* and a null 'error'.
*/
res_val = json_object_get(val, "result");
err_val = json_object_get(val, "error");
if (!res_val || json_is_null(res_val) ||
(err_val && !json_is_null(err_val))) {
char *s;
if (err_val)
s = json_dumps(err_val, JSON_INDENT(3));
else
s = strdup("(unknown reason)");
applog(LOG_INFO, "JSON-RPC call failed: %s", s);
free(s);
goto err_out;
}
if (hi.reason) {
json_object_set_new(val, "reject-reason", json_string(hi.reason));
free(hi.reason);
hi.reason = NULL;
}
successful_connect = true;
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_reset(curl);
return val;
err_out:
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_reset(curl);
if (!successful_connect)
applog(LOG_DEBUG, "Failed to connect in json_rpc_call");
curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1);
return NULL;
}
char *bin2hex(const unsigned char *p, size_t len)
{
unsigned int i;
char *s = malloc((len * 2) + 1);
if (!s)
return NULL;
for (i = 0; i < len; i++)
sprintf(s + (i * 2), "%02x", (unsigned int) p[i]);
return s;
}
bool hex2bin(unsigned char *p, const char *hexstr, size_t len)
{
while (*hexstr && len) {
char hex_byte[3];
unsigned int v;
if (!hexstr[1]) {
applog(LOG_ERR, "hex2bin str truncated");
return false;
}
hex_byte[0] = hexstr[0];
hex_byte[1] = hexstr[1];
hex_byte[2] = 0;
if (sscanf(hex_byte, "%x", &v) != 1) {
applog(LOG_ERR, "hex2bin sscanf '%s' failed", hex_byte);
return false;
}
*p = (unsigned char) v;
p++;
hexstr += 2;
len--;
}
return (len == 0 && *hexstr == 0) ? true : false;
}
/* Subtract the `struct timeval' values X and Y,
storing the result in RESULT.
Return 1 if the difference is negative, otherwise 0. */
int timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
{
/* Perform the carry for the later subtraction by updating Y. */
if (x->tv_usec < y->tv_usec) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/* Compute the time remaining to wait.
* `tv_usec' is certainly positive. */
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
bool fulltest(const unsigned char *hash, const unsigned char *target)
{
unsigned char hash_swap[32], target_swap[32];
uint32_t *hash32 = (uint32_t *) hash_swap;
uint32_t *target32 = (uint32_t *) target_swap;
int i;
bool rc = true;
char *hash_str, *target_str;
swap256(hash_swap, hash);
swap256(target_swap, target);
for (i = 0; i < 32/4; i++) {
uint32_t h32tmp = swab32(hash32[i]);
uint32_t t32tmp = target32[i];
target32[i] = swab32(target32[i]); /* for printing */
if (h32tmp > t32tmp) {
rc = false;
break;
}
if (h32tmp < t32tmp) {
rc = true;
break;
}
}
if (opt_debug) {
hash_str = bin2hex(hash_swap, 32);
target_str = bin2hex(target_swap, 32);
applog(LOG_DEBUG, " Proof: %s\nTarget: %s\nTrgVal? %s",
hash_str,
target_str,
rc ? "YES (hash < target)" :
"no (false positive; hash > target)");
free(hash_str);
free(target_str);
}
return rc;
}
struct thread_q *tq_new(void)
{
struct thread_q *tq;
tq = calloc(1, sizeof(*tq));
if (!tq)
return NULL;
INIT_LIST_HEAD(&tq->q);
pthread_mutex_init(&tq->mutex, NULL);
pthread_cond_init(&tq->cond, NULL);
return tq;
}
void tq_free(struct thread_q *tq)
{
struct tq_ent *ent, *iter;
if (!tq)
return;
list_for_each_entry_safe(ent, iter, &tq->q, q_node) {
list_del(&ent->q_node);
free(ent);
}
pthread_cond_destroy(&tq->cond);
pthread_mutex_destroy(&tq->mutex);
memset(tq, 0, sizeof(*tq)); /* poison */
free(tq);
}
static void tq_freezethaw(struct thread_q *tq, bool frozen)
{
mutex_lock(&tq->mutex);
tq->frozen = frozen;
pthread_cond_signal(&tq->cond);
mutex_unlock(&tq->mutex);
}
void tq_freeze(struct thread_q *tq)
{
tq_freezethaw(tq, true);
}
void tq_thaw(struct thread_q *tq)
{
tq_freezethaw(tq, false);
}
bool tq_push(struct thread_q *tq, void *data)
{
struct tq_ent *ent;
bool rc = true;
ent = calloc(1, sizeof(*ent));
if (!ent)
return false;
ent->data = data;
INIT_LIST_HEAD(&ent->q_node);
mutex_lock(&tq->mutex);
if (!tq->frozen) {
list_add_tail(&ent->q_node, &tq->q);
} else {
free(ent);
rc = false;
}
pthread_cond_signal(&tq->cond);
mutex_unlock(&tq->mutex);
return rc;
}
void *tq_pop(struct thread_q *tq, const struct timespec *abstime)
{
struct tq_ent *ent;
void *rval = NULL;
int rc;
mutex_lock(&tq->mutex);
if (!list_empty(&tq->q))
goto pop;
if (abstime)
rc = pthread_cond_timedwait(&tq->cond, &tq->mutex, abstime);
else
rc = pthread_cond_wait(&tq->cond, &tq->mutex);
if (rc)
goto out;
if (list_empty(&tq->q))
goto out;
pop:
ent = list_entry(tq->q.next, struct tq_ent, q_node);
rval = ent->data;
list_del(&ent->q_node);
free(ent);
out:
mutex_unlock(&tq->mutex);
return rval;
}
int thr_info_create(struct thr_info *thr, pthread_attr_t *attr, void *(*start) (void *), void *arg)
{
int ret;
ret = pthread_create(&thr->pth, attr, start, arg);
return ret;
}
void thr_info_freeze(struct thr_info *thr)
{
struct tq_ent *ent, *iter;
struct thread_q *tq;
if (!thr)
return;
tq = thr->q;
if (!tq)
return;
mutex_lock(&tq->mutex);
tq->frozen = true;
list_for_each_entry_safe(ent, iter, &tq->q, q_node) {
list_del(&ent->q_node);
free(ent);
}
mutex_unlock(&tq->mutex);
}
void thr_info_cancel(struct thr_info *thr)
{
if (!thr)
return;
if (PTH(thr) != 0L) {
pthread_cancel(thr->pth);
PTH(thr) = 0L;
}
}
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