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cpu-miner.c
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cpu-miner.c
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/*
* Copyright 2010 Jeff Garzik
* Copyright 2012-2013 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 <stdint.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 DEF_RPC_URL "http://127.0.0.1:9332/"
#define LP_SCANTIME 60
#ifdef CHEAT
#define CHEATFACTOR /2
#else
#define CHEATFACTOR
#endif
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void)
{
struct sched_param param;
#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_CPUSET, -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 sha256_algos {
ALGO_SCRYPT, /* scrypt(1024,1,1) */
ALGO_SHA256D, /* SHA-256d */
ALGO_SIF,
};
static const char *algo_names[] = {
[ALGO_SCRYPT] = "scrypt",
[ALGO_SHA256D] = "sha256d",
[ALGO_SIF] = "sif",
};
bool opt_hashdebug = false;
bool opt_debug = false;
bool opt_protocol = false;
static bool opt_benchmark = false;
bool want_longpoll = true;
bool have_longpoll = false;
bool want_stratum = true;
bool have_stratum = false;
static bool submit_old = 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 = 270;
int opt_scantime = 5;
static json_t *opt_config;
static const bool opt_time = true;
static enum sha256_algos opt_algo = ALGO_SCRYPT;
static int opt_n_threads;
static int num_processors;
static char *rpc_url;
static char *rpc_userpass;
static char *rpc_user, *rpc_pass;
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;
pthread_mutex_t stats_lock;
static unsigned long accepted_count = 0L;
static unsigned long rejected_count = 0L;
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\
sha256d SHA-256d\n\
sif Sifcoin\n\
-o, --url=URL URL of mining server (default: " DEF_RPC_URL ")\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 network timeout, in seconds (default: 270)\n\
-s, --scantime=N upper bound on time spent scanning current work when\n\
long polling is unavailable, in seconds (default: 5)\n\
--no-longpoll disable X-Long-Polling support\n\
--no-stratum disable X-Stratum support\n\
-q, --quiet disable per-thread hashmeter output\n\
-D, --debug enable debug output\n\
-H, --hashdebug enable hash 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:DHhp: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 },
{ "config", 1, NULL, 'c' },
{ "debug", 0, NULL, 'D' },
{ "hashdebug", 0, NULL, 'H' },
{ "help", 0, NULL, 'h' },
{ "no-longpoll", 0, NULL, 1003 },
{ "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];
char job_id[128];
size_t xnonce2_len;
unsigned char xnonce2[32];
};
static struct work g_work;
static time_t g_work_time;
static pthread_mutex_t g_work_lock;
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 inval data");
goto err_out;
}
if (unlikely(!jobj_binary(val, "target", work->target, sizeof(work->target)))) {
applog(LOG_ERR, "JSON inval 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;
}
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 || opt_hashdebug) && reason)
applog(LOG_DEBUG, "DEBUG: reject reason: %s", reason);
}
static bool submit_upstream_work(CURL *curl, struct work *work)
{
char *str = NULL;
json_t *val, *res, *reason;
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 || opt_hashdebug)
{
applog(LOG_DEBUG, "DEBUG: stale work detected, discarding");
int ii=0;
for (ii=0; ii < 32; ii++)
{
printf ("%.2x",((uint8_t*)(work->data + 1))[ii]);
};
printf ("\n");
for (ii=0; ii < 32; ii++)
{
printf ("%.2x",((uint8_t*)(g_work.data + 1))[ii]);
};
printf ("\n");
}
return true;
}
if (have_stratum) {
uint32_t ntime, nonce;
char *ntimestr, *noncestr, *xnonce2str;
if (!work->job_id)
return true;
le32enc(&ntime, work->data[17]);
le32enc(&nonce, work->data[19]);
ntimestr = bin2hex((const unsigned char *)(&ntime), 4);
noncestr = bin2hex((const unsigned char *)(&nonce), 4);
xnonce2str = bin2hex(work->xnonce2, work->xnonce2_len);
sprintf(s,
"{\"method\": \"mining.submit\", \"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\":4}",
rpc_user, work->job_id, xnonce2str, ntimestr, noncestr);
free(ntimestr);
free(noncestr);
free(xnonce2str);
if (unlikely(!stratum_send_line(&stratum, s))) {
applog(LOG_ERR, "submit_upstream_work stratum_send_line failed");
goto out;
}
} else {
/* build hex string */
for (i = 0; i < ARRAY_SIZE(work->data); i++)
le32enc(work->data + i, work->data[i]);
str = bin2hex((unsigned char *)work->data, sizeof(work->data));
if (unlikely(!str)) {
applog(LOG_ERR, "submit_upstream_work OOM");
goto out;
}
/* build JSON-RPC request */
sprintf(s,
"{\"method\": \"getwork\", \"params\": [ \"%s\" ], \"id\":1}\r\n",
str);
/* issue JSON-RPC request */
val = json_rpc_call(curl, rpc_url, rpc_userpass, s, false, false, NULL);
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:
free(str);
return rc;
}
static const char *rpc_req =
"{\"method\": \"getwork\", \"params\": [], \"id\":0}\r\n";
static bool get_upstream_work(CURL *curl, struct work *work)
{
json_t *val;
bool rc;
struct timeval tv_start, tv_end, diff;
gettimeofday(&tv_start, NULL);
val = json_rpc_call(curl, rpc_url, rpc_userpass, rpc_req,
want_longpoll, false, NULL);
gettimeofday(&tv_end, NULL);
if (have_stratum) {
if (val)
json_decref(val);
return true;
}
if (!val)
return false;
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:
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;
memcpy(wc->u.work, work_in, sizeof(*work_in));
/* send solution to workio thread */
if (!tq_push(thr_info[work_thr_id].q, wc))
goto err_out;
return true;
err_out:
workio_cmd_free(wc);
return false;
}
static void stratum_gen_work(struct stratum_ctx *sctx, struct work *work)
{
unsigned char merkle_root[64];
int i;
pthread_mutex_lock(&sctx->work_lock);
strcpy(work->job_id, sctx->job.job_id);
work->xnonce2_len = sctx->xnonce2_size;
memcpy(work->xnonce2, sctx->job.xnonce2, sctx->xnonce2_size);
/* Generate merkle root */
sha256d(merkle_root, sctx->job.coinbase, sctx->job.coinbase_size);
for (i = 0; i < sctx->job.merkle_count; i++) {
memcpy(merkle_root + 32, sctx->job.merkle[i], 32);
sha256d(merkle_root, merkle_root, 64);
}
/* Increment extranonce2 */
for (i = 0; i < sctx->xnonce2_size && !++sctx->job.xnonce2[i]; i++);
/* Assemble block header */
memset(work->data, 0, 128);
work->data[0] = le32dec(sctx->job.version);
for (i = 0; i < 8; i++)
work->data[1 + i] = le32dec((uint32_t *)sctx->job.prevhash + i);
for (i = 0; i < 8; i++)
work->data[9 + i] = be32dec((uint32_t *)merkle_root + i);
work->data[17] = le32dec(sctx->job.ntime);
work->data[18] = le32dec(sctx->job.nbits);
work->data[20] = 0x80000000;
work->data[31] = 0x00000280;
pthread_mutex_unlock(&sctx->work_lock);
if (opt_debug) {
char *xnonce2str = bin2hex(work->xnonce2, sctx->xnonce2_size);
applog(LOG_DEBUG, "DEBUG: job_id='%s' extranonce2=%s ntime=%08x",
work->job_id, xnonce2str, swab32(work->data[17]));
free(xnonce2str);
}
if (opt_algo == ALGO_SCRYPT)
diff_to_target(work->target, sctx->job.diff / 65536.0);
else
diff_to_target(work->target, sctx->job.diff);
}
static void *miner_thread(void *userdata)
{
struct thr_info *mythr = userdata;
int thr_id = mythr->id;
struct work work;
uint32_t max_nonce;
uint32_t end_nonce = 0xffffffffU / opt_n_threads * (thr_id + 1) - 0x20;
unsigned char *scratchbuf = NULL;
char s[16];
int i;
/* Set worker threads to nice 19 and then preferentially to SCHED_IDLE
* and if that fails, then SCHED_BATCH. No need for this to be an
* error if it fails */
if (!opt_benchmark) {
setpriority(PRIO_PROCESS, 0, 19);
drop_policy();
}
/* Cpu affinity only makes sense if the number of threads is a multiple
* of the number of CPUs */
if (num_processors > 1 && opt_n_threads % num_processors == 0) {
if (!opt_quiet)
applog(LOG_INFO, "Binding thread %d to cpu %d",
thr_id, thr_id % num_processors);
affine_to_cpu(thr_id, thr_id % num_processors);
}
if (opt_algo == ALGO_SCRYPT)
{
scratchbuf = scrypt_buffer_alloc();
}
while (1) {
unsigned long hashes_done;
struct timeval tv_start, tv_end, diff;
int64_t max64;
int rc;
if (have_stratum) {
while (!*g_work.job_id || time(NULL) >= g_work_time + 120)
sleep(1);
pthread_mutex_lock(&g_work_lock);
if (work.data[19] >= end_nonce)
stratum_gen_work(&stratum, &g_work);
} else {
/* obtain new work from internal workio thread */
pthread_mutex_lock(&g_work_lock);
if (!(have_longpoll || have_stratum) ||
time(NULL) >= g_work_time + LP_SCANTIME*3/4 ||
work.data[19] >= end_nonce) {
if (unlikely(!get_work(mythr, &g_work))) {
applog(LOG_ERR, "work retrieval failed, exiting "
"mining thread %d", mythr->id);
pthread_mutex_unlock(&g_work_lock);
goto out;
}
time(&g_work_time);
}
if (have_stratum) {
pthread_mutex_unlock(&g_work_lock);
continue;
}
}
if (memcmp(work.data, g_work.data, 76)) {
memcpy(&work, &g_work, sizeof(struct work));
work.data[19] = 0xffffffffU / opt_n_threads * thr_id;
} else
work.data[19]++;
pthread_mutex_unlock(&g_work_lock);
work_restart[thr_id].restart = 0;
/* adjust max_nonce to meet target scan time */
if (have_stratum)
max64 = LP_SCANTIME;
else
max64 = g_work_time + (have_longpoll ? LP_SCANTIME : opt_scantime)
- time(NULL);
max64 *= thr_hashrates[thr_id];
if (max64 <= 0)
max64 = opt_algo == ALGO_SCRYPT ? 0xfffLL : 0x1fffffLL;
if (work.data[19] + max64 > end_nonce)
max_nonce = end_nonce;
else
max_nonce = work.data[19] + max64;
hashes_done = 0;
gettimeofday(&tv_start, NULL);
/* scan nonces for a proof-of-work hash */
switch (opt_algo) {
case ALGO_SCRYPT:
rc = scanhash_scrypt(thr_id, work.data, scratchbuf, work.target,
max_nonce, &hashes_done);
break;
case ALGO_SHA256D:
rc = scanhash_sha256d(thr_id, work.data, work.target,
max_nonce, &hashes_done);
break;
case ALGO_SIF:
rc = scanhash_sif(thr_id, work.data, work.target,
max_nonce, &hashes_done);
break;
default:
/* should never happen */
goto out;
}
/* record scanhash elapsed time */
gettimeofday(&tv_end, NULL);
timeval_subtract(&diff, &tv_end, &tv_start);
if (diff.tv_usec || diff.tv_sec) {
pthread_mutex_lock(&stats_lock);
// == SIF ===================================================
if (opt_algo == ALGO_SIF)
thr_hashrates[thr_id] =
hashes_done CHEATFACTOR / (diff.tv_sec + 1e-6 * diff.tv_usec);
else
thr_hashrates[thr_id] =
hashes_done / (diff.tv_sec + 1e-6 * diff.tv_usec);
// == SIF ====================================================
pthread_mutex_unlock(&stats_lock);
}
if (!opt_quiet) {
sprintf(s, thr_hashrates[thr_id] >= 1e6 ? "%.0f" : "%.2f",
1e-3 * thr_hashrates[thr_id]);
applog(LOG_INFO, "thread %d: %lu hashes, %s khash/s",
thr_id, hashes_done, s);
}
if (opt_benchmark && thr_id == opt_n_threads - 1) {
double hashrate = 0.;
for (i = 0; i < opt_n_threads && thr_hashrates[i]; i++)
hashrate += thr_hashrates[i];
if (i == opt_n_threads) {
sprintf(s, hashrate >= 1e6 ? "%.0f" : "%.2f", 1e-3 * hashrate);
applog(LOG_INFO, "Total: %s khash/s", s);
}
}
/* if nonce found, submit work */
if (rc && !opt_benchmark && !submit_work(mythr, &work))
break;
}
out:
tq_freeze(mythr->q);
return NULL;
}
static void restart_threads(void)
{
int i;
for (i = 0; i < opt_n_threads; i++)
work_restart[i].restart = 1;
}
static void *longpoll_thread(void *userdata)
{
struct thr_info *mythr = userdata;
CURL *curl = NULL;
char *copy_start, *hdr_path = NULL, *lp_url = NULL;
bool need_slash = false;
curl = curl_easy_init();
if (unlikely(!curl)) {
applog(LOG_ERR, "CURL initialization failed");
goto out;
}
start:
hdr_path = tq_pop(mythr->q, NULL);
if (!hdr_path)
goto out;
/* full URL */
if (strstr(hdr_path, "://")) {
lp_url = hdr_path;
hdr_path = NULL;
}
/* absolute path, on current server */
else {
copy_start = (*hdr_path == '/') ? (hdr_path + 1) : hdr_path;
if (rpc_url[strlen(rpc_url) - 1] != '/')
need_slash = true;
lp_url = malloc(strlen(rpc_url) + strlen(copy_start) + 2);
if (!lp_url)
goto out;
sprintf(lp_url, "%s%s%s", rpc_url, need_slash ? "/" : "", copy_start);
}
applog(LOG_INFO, "Long-polling activated for %s", lp_url);
while (1) {
json_t *val, *soval;
int err;
val = json_rpc_call(curl, lp_url, rpc_userpass, rpc_req,
false, true, &err);
if (have_stratum) {
if (val)
json_decref(val);
goto out;
}
if (likely(val)) {
applog(LOG_INFO, "LONGPOLL detected new block");
soval = json_object_get(json_object_get(val, "result"), "submitold");
submit_old = soval ? json_is_true(soval) : false;
pthread_mutex_lock(&g_work_lock);
if (work_decode(json_object_get(val, "result"), &g_work)) {
if (opt_debug)
applog(LOG_DEBUG, "DEBUG: got new work");
time(&g_work_time);
restart_threads();
}
pthread_mutex_unlock(&g_work_lock);
json_decref(val);
} else {
pthread_mutex_lock(&g_work_lock);
g_work_time -= LP_SCANTIME;
pthread_mutex_unlock(&g_work_lock);
if (err == CURLE_OPERATION_TIMEDOUT) {
restart_threads();
} else {
have_longpoll = false;
restart_threads();
free(hdr_path);
free(lp_url);
lp_url = NULL;
sleep(opt_fail_pause);
goto start;
}
}
}
out:
free(hdr_path);
free(lp_url);
tq_freeze(mythr->q);
if (curl)
curl_easy_cleanup(curl);
return NULL;
}
static bool stratum_handle_response(char *buf)
{
json_t *val, *err_val, *res_val, *id_val;
json_error_t err;
bool ret = false;
val = JSON_LOADS(buf, &err);
if (!val) {
applog(LOG_INFO, "JSON decode failed(%d): %s", err.line, err.text);
goto out;
}
res_val = json_object_get(val, "result");
err_val = json_object_get(val, "error");
id_val = json_object_get(val, "id");
if (!id_val || json_is_null(id_val) || !res_val)
goto out;
share_result(json_is_true(res_val),
err_val ? json_string_value(json_array_get(err_val, 1)) : NULL);
ret = true;
out:
if (val)
json_decref(val);
return ret;
}
static void *stratum_thread(void *userdata)
{
struct thr_info *mythr = userdata;
char *s;
stratum.url = tq_pop(mythr->q, NULL);
if (!stratum.url)
goto out;
applog(LOG_INFO, "Starting Stratum on %s", stratum.url);
while (1) {
int failures = 0;
while (!stratum.curl) {
pthread_mutex_lock(&g_work_lock);
g_work_time = 0;
pthread_mutex_unlock(&g_work_lock);
restart_threads();
if (!stratum_connect(&stratum, stratum.url) ||
!stratum_subscribe(&stratum) ||
!stratum_authorize(&stratum, rpc_user, rpc_pass)) {
stratum_disconnect(&stratum);
if (opt_retries >= 0 && ++failures > opt_retries) {
applog(LOG_ERR, "...terminating workio thread");
tq_push(thr_info[work_thr_id].q, NULL);
goto out;
}