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cpu-miner.c
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/*
* Copyright 2010 Jeff Garzik
* Copyright 2012-2015 pooler
*
* 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 2 of the License, or (at your option)
* any later version. See COPYING for more details.
*/
#include "cpuminer-config.h"
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <inttypes.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#ifdef WIN32
#include <windows.h>
#else
#include <errno.h>
#include <signal.h>
#include <sys/resource.h>
#if HAVE_SYS_SYSCTL_H
#include <sys/types.h>
#if HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/sysctl.h>
#endif
#endif
#include <jansson.h>
#include <curl/curl.h>
#include "compat.h"
#include "miner.h"
#define PROGRAM_NAME "minerd"
#define LP_SCANTIME 60
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void)
{
struct sched_param param;
param.sched_priority = 0;
#ifdef SCHED_IDLE
if (unlikely(sched_setscheduler(0, SCHED_IDLE, ¶m) == -1))
#endif
#ifdef SCHED_BATCH
sched_setscheduler(0, SCHED_BATCH, ¶m);
#endif
}
static inline void affine_to_cpu(int id, int cpu)
{
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
sched_setaffinity(0, sizeof(set), &set);
}
#elif defined(__FreeBSD__) /* FreeBSD specific policy and affinity management */
#include <sys/cpuset.h>
static inline void drop_policy(void)
{
}
static inline void affine_to_cpu(int id, int cpu)
{
cpuset_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(cpuset_t), &set);
}
#else
static inline void drop_policy(void)
{
}
static inline void affine_to_cpu(int id, int cpu)
{
}
#endif
enum workio_commands {
WC_GET_WORK,
WC_SUBMIT_WORK,
};
struct workio_cmd {
enum workio_commands cmd;
struct thr_info *thr;
union {
struct work *work;
} u;
};
enum algos {
ALGO_SCRYPT, /* scrypt(1024,1,1) */
ALGO_SHA256D, /* SHA-256d */
};
static const char *algo_names[] = {
[ALGO_SCRYPT] = "scrypt",
[ALGO_SHA256D] = "sha256d",
};
bool opt_debug = false;
bool opt_protocol = false;
static bool opt_benchmark = false;
bool opt_redirect = true;
bool want_longpoll = true;
bool have_longpoll = false;
bool have_gbt = true;
bool allow_getwork = true;
bool want_stratum = true;
bool have_stratum = false;
bool use_syslog = false;
static bool opt_background = false;
static bool opt_quiet = false;
static int opt_retries = -1;
static int opt_fail_pause = 30;
int opt_timeout = 0;
static int opt_scantime = 5;
static const bool opt_time = true;
static enum algos opt_algo = ALGO_SCRYPT;
static int opt_scrypt_n = 1024;
static int opt_n_threads;
static int num_processors;
static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
static int pk_script_size;
static unsigned char pk_script[25];
static char coinbase_sig[101] = "";
char *opt_cert;
char *opt_proxy;
long opt_proxy_type;
struct thr_info *thr_info;
static int work_thr_id;
int longpoll_thr_id = -1;
int stratum_thr_id = -1;
struct work_restart *work_restart = NULL;
static struct stratum_ctx stratum;
pthread_mutex_t applog_lock;
static pthread_mutex_t stats_lock;
static unsigned long accepted_count = 0L;
static unsigned long rejected_count = 0L;
static double *thr_hashrates;
#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#else
struct option {
const char *name;
int has_arg;
int *flag;
int val;
};
#endif
static char const usage[] = "\
Usage: " PROGRAM_NAME " [OPTIONS]\n\
Options:\n\
-a, --algo=ALGO specify the algorithm to use\n\
scrypt scrypt(1024, 1, 1) (default)\n\
scrypt:N scrypt(N, 1, 1)\n\
sha256d SHA-256d\n\
-o, --url=URL URL of mining server\n\
-O, --userpass=U:P username:password pair for mining server\n\
-u, --user=USERNAME username for mining server\n\
-p, --pass=PASSWORD password for mining server\n\
--cert=FILE certificate for mining server using SSL\n\
-x, --proxy=[PROTOCOL://]HOST[:PORT] connect through a proxy\n\
-t, --threads=N number of miner threads (default: number of processors)\n\
-r, --retries=N number of times to retry if a network call fails\n\
(default: retry indefinitely)\n\
-R, --retry-pause=N time to pause between retries, in seconds (default: 30)\n\
-T, --timeout=N timeout for long polling, in seconds (default: none)\n\
-s, --scantime=N upper bound on time spent scanning current work when\n\
long polling is unavailable, in seconds (default: 5)\n\
--coinbase-addr=ADDR payout address for solo mining\n\
--coinbase-sig=TEXT data to insert in the coinbase when possible\n\
--no-longpoll disable long polling support\n\
--no-getwork disable getwork support\n\
--no-gbt disable getblocktemplate support\n\
--no-stratum disable X-Stratum support\n\
--no-redirect ignore requests to change the URL of the mining server\n\
-q, --quiet disable per-thread hashmeter output\n\
-D, --debug enable debug output\n\
-P, --protocol-dump verbose dump of protocol-level activities\n"
#ifdef HAVE_SYSLOG_H
"\
-S, --syslog use system log for output messages\n"
#endif
#ifndef WIN32
"\
-B, --background run the miner in the background\n"
#endif
"\
--benchmark run in offline benchmark mode\n\
-c, --config=FILE load a JSON-format configuration file\n\
-V, --version display version information and exit\n\
-h, --help display this help text and exit\n\
";
static char const short_options[] =
#ifndef WIN32
"B"
#endif
#ifdef HAVE_SYSLOG_H
"S"
#endif
"a:c:Dhp:Px:qr:R:s:t:T:o:u:O:V";
static struct option const options[] = {
{ "algo", 1, NULL, 'a' },
#ifndef WIN32
{ "background", 0, NULL, 'B' },
#endif
{ "benchmark", 0, NULL, 1005 },
{ "cert", 1, NULL, 1001 },
{ "coinbase-addr", 1, NULL, 1013 },
{ "coinbase-sig", 1, NULL, 1015 },
{ "config", 1, NULL, 'c' },
{ "debug", 0, NULL, 'D' },
{ "help", 0, NULL, 'h' },
{ "no-gbt", 0, NULL, 1011 },
{ "no-getwork", 0, NULL, 1010 },
{ "no-longpoll", 0, NULL, 1003 },
{ "no-redirect", 0, NULL, 1009 },
{ "no-stratum", 0, NULL, 1007 },
{ "pass", 1, NULL, 'p' },
{ "protocol-dump", 0, NULL, 'P' },
{ "proxy", 1, NULL, 'x' },
{ "quiet", 0, NULL, 'q' },
{ "retries", 1, NULL, 'r' },
{ "retry-pause", 1, NULL, 'R' },
{ "scantime", 1, NULL, 's' },
#ifdef HAVE_SYSLOG_H
{ "syslog", 0, NULL, 'S' },
#endif
{ "threads", 1, NULL, 't' },
{ "timeout", 1, NULL, 'T' },
{ "url", 1, NULL, 'o' },
{ "user", 1, NULL, 'u' },
{ "userpass", 1, NULL, 'O' },
{ "version", 0, NULL, 'V' },
{ 0, 0, 0, 0 }
};
struct work {
uint32_t data[32];
uint32_t target[8];
int height;
char *txs;
char *workid;
char *job_id;
size_t xnonce2_len;
unsigned char *xnonce2;
};
static struct work g_work;
static time_t g_work_time;
static pthread_mutex_t g_work_lock;
static bool submit_old = false;
static char *lp_id;
static inline void work_free(struct work *w)
{
free(w->txs);
free(w->workid);
free(w->job_id);
free(w->xnonce2);
}
static inline void work_copy(struct work *dest, const struct work *src)
{
memcpy(dest, src, sizeof(struct work));
if (src->txs)
dest->txs = strdup(src->txs);
if (src->workid)
dest->workid = strdup(src->workid);
if (src->job_id)
dest->job_id = strdup(src->job_id);
if (src->xnonce2) {
dest->xnonce2 = malloc(src->xnonce2_len);
memcpy(dest->xnonce2, src->xnonce2, src->xnonce2_len);
}
}
static bool jobj_binary(const json_t *obj, const char *key,
void *buf, size_t buflen)
{
const char *hexstr;
json_t *tmp;
tmp = json_object_get(obj, key);
if (unlikely(!tmp)) {
applog(LOG_ERR, "JSON key '%s' not found", key);
return false;
}
hexstr = json_string_value(tmp);
if (unlikely(!hexstr)) {
applog(LOG_ERR, "JSON key '%s' is not a string", key);
return false;
}
if (!hex2bin(buf, hexstr, buflen))
return false;
return true;
}
static bool work_decode(const json_t *val, struct work *work)
{
int i;
if (unlikely(!jobj_binary(val, "data", work->data, sizeof(work->data)))) {
applog(LOG_ERR, "JSON invalid data");
goto err_out;
}
if (unlikely(!jobj_binary(val, "target", work->target, sizeof(work->target)))) {
applog(LOG_ERR, "JSON invalid target");
goto err_out;
}
for (i = 0; i < ARRAY_SIZE(work->data); i++)
work->data[i] = le32dec(work->data + i);
for (i = 0; i < ARRAY_SIZE(work->target); i++)
work->target[i] = le32dec(work->target + i);
return true;
err_out:
return false;
}
#define BLOCK_VERSION_MASK 0x000000ff
#define BLOCK_VERSION_CURRENT 4
static bool gbt_work_decode(const json_t *val, struct work *work)
{
int i, n;
uint32_t version, curtime, bits;
uint32_t prevhash[8];
uint32_t target[8];
int cbtx_size;
unsigned char *cbtx = NULL;
int tx_count, tx_size;
unsigned char txc_vi[9];
unsigned char (*merkle_tree)[32] = NULL;
bool coinbase_append = false;
bool submit_coinbase = false;
bool version_force = false;
bool version_reduce = false;
json_t *tmp, *txa;
bool rc = false;
tmp = json_object_get(val, "mutable");
if (tmp && json_is_array(tmp)) {
n = json_array_size(tmp);
for (i = 0; i < n; i++) {
const char *s = json_string_value(json_array_get(tmp, i));
if (!s)
continue;
if (!strcmp(s, "coinbase/append"))
coinbase_append = true;
else if (!strcmp(s, "submit/coinbase"))
submit_coinbase = true;
else if (!strcmp(s, "version/force"))
version_force = true;
else if (!strcmp(s, "version/reduce"))
version_reduce = true;
}
}
tmp = json_object_get(val, "height");
if (!tmp || !json_is_integer(tmp)) {
applog(LOG_ERR, "JSON invalid height");
goto out;
}
work->height = json_integer_value(tmp);
tmp = json_object_get(val, "version");
if (!tmp || !json_is_integer(tmp)) {
applog(LOG_ERR, "JSON invalid version");
goto out;
}
version = json_integer_value(tmp);
if ((version & BLOCK_VERSION_MASK) > BLOCK_VERSION_CURRENT) {
if (version_reduce) {
version = (version & ~BLOCK_VERSION_MASK) | BLOCK_VERSION_CURRENT;
} else if (!version_force) {
applog(LOG_WARNING, "Unrecognized block version: %u", version);
}
}
if (unlikely(!jobj_binary(val, "previousblockhash", prevhash, sizeof(prevhash)))) {
applog(LOG_ERR, "JSON invalid previousblockhash");
goto out;
}
tmp = json_object_get(val, "curtime");
if (!tmp || !json_is_integer(tmp)) {
applog(LOG_ERR, "JSON invalid curtime");
goto out;
}
curtime = json_integer_value(tmp);
if (unlikely(!jobj_binary(val, "bits", &bits, sizeof(bits)))) {
applog(LOG_ERR, "JSON invalid bits");
goto out;
}
/* find count and size of transactions */
txa = json_object_get(val, "transactions");
if (!txa || !json_is_array(txa)) {
applog(LOG_ERR, "JSON invalid transactions");
goto out;
}
tx_count = json_array_size(txa);
tx_size = 0;
for (i = 0; i < tx_count; i++) {
const json_t *tx = json_array_get(txa, i);
const char *tx_hex = json_string_value(json_object_get(tx, "data"));
if (!tx_hex) {
applog(LOG_ERR, "JSON invalid transactions");
goto out;
}
tx_size += strlen(tx_hex) / 2;
}
/* build coinbase transaction */
tmp = json_object_get(val, "coinbasetxn");
if (tmp) {
const char *cbtx_hex = json_string_value(json_object_get(tmp, "data"));
cbtx_size = cbtx_hex ? strlen(cbtx_hex) / 2 : 0;
cbtx = malloc(cbtx_size + 100);
if (cbtx_size < 60 || !hex2bin(cbtx, cbtx_hex, cbtx_size)) {
applog(LOG_ERR, "JSON invalid coinbasetxn");
goto out;
}
} else {
int64_t cbvalue;
if (!pk_script_size) {
if (allow_getwork) {
applog(LOG_INFO, "No payout address provided, switching to getwork");
have_gbt = false;
} else
applog(LOG_ERR, "No payout address provided");
goto out;
}
tmp = json_object_get(val, "coinbasevalue");
if (!tmp || !json_is_number(tmp)) {
applog(LOG_ERR, "JSON invalid coinbasevalue");
goto out;
}
cbvalue = json_is_integer(tmp) ? json_integer_value(tmp) : json_number_value(tmp);
cbtx = malloc(256);
le32enc((uint32_t *)cbtx, 1); /* version */
cbtx[4] = 1; /* in-counter */
memset(cbtx+5, 0x00, 32); /* prev txout hash */
le32enc((uint32_t *)(cbtx+37), 0xffffffff); /* prev txout index */
cbtx_size = 43;
/* BIP 34: height in coinbase */
for (n = work->height; n; n >>= 8)
cbtx[cbtx_size++] = n & 0xff;
cbtx[42] = cbtx_size - 43;
cbtx[41] = cbtx_size - 42; /* scriptsig length */
le32enc((uint32_t *)(cbtx+cbtx_size), 0xffffffff); /* sequence */
cbtx_size += 4;
cbtx[cbtx_size++] = 1; /* out-counter */
le32enc((uint32_t *)(cbtx+cbtx_size), (uint32_t)cbvalue); /* value */
le32enc((uint32_t *)(cbtx+cbtx_size+4), cbvalue >> 32);
cbtx_size += 8;
cbtx[cbtx_size++] = pk_script_size; /* txout-script length */
memcpy(cbtx+cbtx_size, pk_script, pk_script_size);
cbtx_size += pk_script_size;
le32enc((uint32_t *)(cbtx+cbtx_size), 0); /* lock time */
cbtx_size += 4;
coinbase_append = true;
}
if (coinbase_append) {
unsigned char xsig[100];
int xsig_len = 0;
if (*coinbase_sig) {
n = strlen(coinbase_sig);
if (cbtx[41] + xsig_len + n <= 100) {
memcpy(xsig+xsig_len, coinbase_sig, n);
xsig_len += n;
} else {
applog(LOG_WARNING, "Signature does not fit in coinbase, skipping");
}
}
tmp = json_object_get(val, "coinbaseaux");
if (tmp && json_is_object(tmp)) {
void *iter = json_object_iter(tmp);
while (iter) {
unsigned char buf[100];
const char *s = json_string_value(json_object_iter_value(iter));
n = s ? strlen(s) / 2 : 0;
if (!s || n > 100 || !hex2bin(buf, s, n)) {
applog(LOG_ERR, "JSON invalid coinbaseaux");
break;
}
if (cbtx[41] + xsig_len + n <= 100) {
memcpy(xsig+xsig_len, buf, n);
xsig_len += n;
}
iter = json_object_iter_next(tmp, iter);
}
}
if (xsig_len) {
unsigned char *ssig_end = cbtx + 42 + cbtx[41];
int push_len = cbtx[41] + xsig_len < 76 ? 1 :
cbtx[41] + 2 + xsig_len > 100 ? 0 : 2;
n = xsig_len + push_len;
memmove(ssig_end + n, ssig_end, cbtx_size - 42 - cbtx[41]);
cbtx[41] += n;
if (push_len == 2)
*(ssig_end++) = 0x4c; /* OP_PUSHDATA1 */
if (push_len)
*(ssig_end++) = xsig_len;
memcpy(ssig_end, xsig, xsig_len);
cbtx_size += n;
}
}
n = varint_encode(txc_vi, 1 + tx_count);
work->txs = malloc(2 * (n + cbtx_size + tx_size) + 1);
bin2hex(work->txs, txc_vi, n);
bin2hex(work->txs + 2*n, cbtx, cbtx_size);
/* generate merkle root */
merkle_tree = malloc(32 * ((1 + tx_count + 1) & ~1));
sha256d(merkle_tree[0], cbtx, cbtx_size);
for (i = 0; i < tx_count; i++) {
tmp = json_array_get(txa, i);
const char *tx_hex = json_string_value(json_object_get(tmp, "data"));
const int tx_size = tx_hex ? strlen(tx_hex) / 2 : 0;
unsigned char *tx = malloc(tx_size);
if (!tx_hex || !hex2bin(tx, tx_hex, tx_size)) {
applog(LOG_ERR, "JSON invalid transactions");
free(tx);
goto out;
}
sha256d(merkle_tree[1 + i], tx, tx_size);
free(tx);
if (!submit_coinbase)
strcat(work->txs, tx_hex);
}
n = 1 + tx_count;
while (n > 1) {
if (n % 2) {
memcpy(merkle_tree[n], merkle_tree[n-1], 32);
++n;
}
n /= 2;
for (i = 0; i < n; i++)
sha256d(merkle_tree[i], merkle_tree[2*i], 64);
}
/* assemble block header */
work->data[0] = swab32(version);
for (i = 0; i < 8; i++)
work->data[8 - i] = le32dec(prevhash + i);
for (i = 0; i < 8; i++)
work->data[9 + i] = be32dec((uint32_t *)merkle_tree[0] + i);
work->data[17] = swab32(curtime);
work->data[18] = le32dec(&bits);
memset(work->data + 19, 0x00, 52);
work->data[20] = 0x80000000;
work->data[31] = 0x00000280;
if (unlikely(!jobj_binary(val, "target", target, sizeof(target)))) {
applog(LOG_ERR, "JSON invalid target");
goto out;
}
for (i = 0; i < ARRAY_SIZE(work->target); i++)
work->target[7 - i] = be32dec(target + i);
tmp = json_object_get(val, "workid");
if (tmp) {
if (!json_is_string(tmp)) {
applog(LOG_ERR, "JSON invalid workid");
goto out;
}
work->workid = strdup(json_string_value(tmp));
}
/* Long polling */
tmp = json_object_get(val, "longpollid");
if (want_longpoll && json_is_string(tmp)) {
free(lp_id);
lp_id = strdup(json_string_value(tmp));
if (!have_longpoll) {
char *lp_uri;
tmp = json_object_get(val, "longpolluri");
lp_uri = strdup(json_is_string(tmp) ? json_string_value(tmp) : rpc_url);
have_longpoll = true;
tq_push(thr_info[longpoll_thr_id].q, lp_uri);
}
}
rc = true;
out:
free(cbtx);
free(merkle_tree);
return rc;
}
static void share_result(int result, const char *reason)
{
char s[345];
double hashrate;
int i;
hashrate = 0.;
pthread_mutex_lock(&stats_lock);
for (i = 0; i < opt_n_threads; i++)
hashrate += thr_hashrates[i];
result ? accepted_count++ : rejected_count++;
pthread_mutex_unlock(&stats_lock);
sprintf(s, hashrate >= 1e6 ? "%.0f" : "%.2f", 1e-3 * hashrate);
applog(LOG_INFO, "accepted: %lu/%lu (%.2f%%), %s khash/s %s",
accepted_count,
accepted_count + rejected_count,
100. * accepted_count / (accepted_count + rejected_count),
s,
result ? "(yay!!!)" : "(booooo)");
if (opt_debug && reason)
applog(LOG_DEBUG, "DEBUG: reject reason: %s", reason);
}
static bool submit_upstream_work(CURL *curl, struct work *work)
{
json_t *val, *res, *reason;
char data_str[2 * sizeof(work->data) + 1];
char s[345];
int i;
bool rc = false;
/* pass if the previous hash is not the current previous hash */
if (!submit_old && memcmp(work->data + 1, g_work.data + 1, 32)) {
if (opt_debug)
applog(LOG_DEBUG, "DEBUG: stale work detected, discarding");
return true;
}
if (have_stratum) {
uint32_t ntime, nonce;
char ntimestr[9], noncestr[9], *xnonce2str, *req;
le32enc(&ntime, work->data[17]);
le32enc(&nonce, work->data[19]);
bin2hex(ntimestr, (const unsigned char *)(&ntime), 4);
bin2hex(noncestr, (const unsigned char *)(&nonce), 4);
xnonce2str = abin2hex(work->xnonce2, work->xnonce2_len);
req = malloc(256 + strlen(rpc_user) + strlen(work->job_id) + 2 * work->xnonce2_len);
sprintf(req,
"{\"method\": \"mining.submit\", \"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\":4}",
rpc_user, work->job_id, xnonce2str, ntimestr, noncestr);
free(xnonce2str);
rc = stratum_send_line(&stratum, req);
free(req);
if (unlikely(!rc)) {
applog(LOG_ERR, "submit_upstream_work stratum_send_line failed");
goto out;
}
} else if (work->txs) {
char *req;
for (i = 0; i < ARRAY_SIZE(work->data); i++)
be32enc(work->data + i, work->data[i]);
bin2hex(data_str, (unsigned char *)work->data, 80);
if (work->workid) {
char *params;
val = json_object();
json_object_set_new(val, "workid", json_string(work->workid));
params = json_dumps(val, 0);
json_decref(val);
req = malloc(128 + 2*80 + strlen(work->txs) + strlen(params));
sprintf(req,
"{\"method\": \"submitblock\", \"params\": [\"%s%s\", %s], \"id\":1}\r\n",
data_str, work->txs, params);
free(params);
} else {
req = malloc(128 + 2*80 + strlen(work->txs));
sprintf(req,
"{\"method\": \"submitblock\", \"params\": [\"%s%s\"], \"id\":1}\r\n",
data_str, work->txs);
}
val = json_rpc_call(curl, rpc_url, rpc_userpass, req, NULL, 0);
free(req);
if (unlikely(!val)) {
applog(LOG_ERR, "submit_upstream_work json_rpc_call failed");
goto out;
}
res = json_object_get(val, "result");
if (json_is_object(res)) {
char *res_str;
bool sumres = false;
void *iter = json_object_iter(res);
while (iter) {
if (json_is_null(json_object_iter_value(iter))) {
sumres = true;
break;
}
iter = json_object_iter_next(res, iter);
}
res_str = json_dumps(res, 0);
share_result(sumres, res_str);
free(res_str);
} else
share_result(json_is_null(res), json_string_value(res));
json_decref(val);
} else {
/* build hex string */
for (i = 0; i < ARRAY_SIZE(work->data); i++)
le32enc(work->data + i, work->data[i]);
bin2hex(data_str, (unsigned char *)work->data, sizeof(work->data));
/* build JSON-RPC request */
sprintf(s,
"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
data_str);
/* issue JSON-RPC request */
val = json_rpc_call(curl, rpc_url, rpc_userpass, s, NULL, 0);
if (unlikely(!val)) {
applog(LOG_ERR, "submit_upstream_work json_rpc_call failed");
goto out;
}
res = json_object_get(val, "result");
reason = json_object_get(val, "reject-reason");
share_result(json_is_true(res), reason ? json_string_value(reason) : NULL);
json_decref(val);
}
rc = true;
out:
return rc;
}
static const char *getwork_req =
"{\"method\": \"getwork\", \"params\": [], \"id\":0}\r\n";
#define GBT_CAPABILITIES "[\"coinbasetxn\", \"coinbasevalue\", \"longpoll\", \"workid\"]"
static const char *gbt_req =
"{\"method\": \"getblocktemplate\", \"params\": [{\"capabilities\": "
GBT_CAPABILITIES "}], \"id\":0}\r\n";
static const char *gbt_lp_req =
"{\"method\": \"getblocktemplate\", \"params\": [{\"capabilities\": "
GBT_CAPABILITIES ", \"longpollid\": \"%s\"}], \"id\":0}\r\n";
static bool get_upstream_work(CURL *curl, struct work *work)
{
json_t *val;
int err;
bool rc;
struct timeval tv_start, tv_end, diff;
start:
gettimeofday(&tv_start, NULL);
val = json_rpc_call(curl, rpc_url, rpc_userpass,
have_gbt ? gbt_req : getwork_req,
&err, have_gbt ? JSON_RPC_QUIET_404 : 0);
gettimeofday(&tv_end, NULL);
if (have_stratum) {
if (val)
json_decref(val);
return true;
}
if (!have_gbt && !allow_getwork) {
applog(LOG_ERR, "No usable protocol");
if (val)
json_decref(val);
return false;
}
if (have_gbt && allow_getwork && !val && err == CURLE_OK) {
applog(LOG_INFO, "getblocktemplate failed, falling back to getwork");
have_gbt = false;
goto start;
}
if (!val)
return false;
if (have_gbt) {
rc = gbt_work_decode(json_object_get(val, "result"), work);
if (!have_gbt) {
json_decref(val);
goto start;
}
} else
rc = work_decode(json_object_get(val, "result"), work);
if (opt_debug && rc) {
timeval_subtract(&diff, &tv_end, &tv_start);
applog(LOG_DEBUG, "DEBUG: got new work in %d ms",
diff.tv_sec * 1000 + diff.tv_usec / 1000);
}
json_decref(val);
return rc;
}
static void workio_cmd_free(struct workio_cmd *wc)
{
if (!wc)
return;
switch (wc->cmd) {
case WC_SUBMIT_WORK:
work_free(wc->u.work);
free(wc->u.work);
break;
default: /* do nothing */
break;
}
memset(wc, 0, sizeof(*wc)); /* poison */
free(wc);
}
static bool workio_get_work(struct workio_cmd *wc, CURL *curl)
{
struct work *ret_work;
int failures = 0;
ret_work = calloc(1, sizeof(*ret_work));
if (!ret_work)
return false;
/* obtain new work from bitcoin via JSON-RPC */
while (!get_upstream_work(curl, ret_work)) {
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "json_rpc_call failed, terminating workio thread");
free(ret_work);
return false;
}
/* pause, then restart work-request loop */
applog(LOG_ERR, "json_rpc_call failed, retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
/* send work to requesting thread */
if (!tq_push(wc->thr->q, ret_work))
free(ret_work);
return true;
}
static bool workio_submit_work(struct workio_cmd *wc, CURL *curl)
{
int failures = 0;
/* submit solution to bitcoin via JSON-RPC */
while (!submit_upstream_work(curl, wc->u.work)) {
if (unlikely((opt_retries >= 0) && (++failures > opt_retries))) {
applog(LOG_ERR, "...terminating workio thread");
return false;
}
/* pause, then restart work-request loop */
applog(LOG_ERR, "...retry after %d seconds",
opt_fail_pause);
sleep(opt_fail_pause);
}
return true;
}
static void *workio_thread(void *userdata)
{
struct thr_info *mythr = userdata;
CURL *curl;
bool ok = true;
curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialization failed");
return NULL;
}
while (ok) {
struct workio_cmd *wc;
/* wait for workio_cmd sent to us, on our queue */
wc = tq_pop(mythr->q, NULL);
if (!wc) {
ok = false;
break;
}
/* process workio_cmd */
switch (wc->cmd) {
case WC_GET_WORK:
ok = workio_get_work(wc, curl);
break;
case WC_SUBMIT_WORK:
ok = workio_submit_work(wc, curl);
break;
default: /* should never happen */
ok = false;
break;
}
workio_cmd_free(wc);
}
tq_freeze(mythr->q);
curl_easy_cleanup(curl);
return NULL;
}
static bool get_work(struct thr_info *thr, struct work *work)
{
struct workio_cmd *wc;
struct work *work_heap;
if (opt_benchmark) {
memset(work->data, 0x55, 76);
work->data[17] = swab32(time(NULL));
memset(work->data + 19, 0x00, 52);
work->data[20] = 0x80000000;
work->data[31] = 0x00000280;
memset(work->target, 0x00, sizeof(work->target));
return true;
}
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (!wc)
return false;
wc->cmd = WC_GET_WORK;
wc->thr = thr;
/* send work request to workio thread */
if (!tq_push(thr_info[work_thr_id].q, wc)) {
workio_cmd_free(wc);
return false;
}
/* wait for response, a unit of work */
work_heap = tq_pop(thr->q, NULL);
if (!work_heap)
return false;
/* copy returned work into storage provided by caller */
memcpy(work, work_heap, sizeof(*work));
free(work_heap);
return true;
}
static bool submit_work(struct thr_info *thr, const struct work *work_in)
{
struct workio_cmd *wc;
/* fill out work request message */
wc = calloc(1, sizeof(*wc));
if (!wc)
return false;
wc->u.work = malloc(sizeof(*work_in));
if (!wc->u.work)
goto err_out;
wc->cmd = WC_SUBMIT_WORK;
wc->thr = thr;
work_copy(wc->u.work, work_in);