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util.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.
*/
#define _GNU_SOURCE
#include "cpuminer-config.h"
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <jansson.h>
#include <curl/curl.h>
#include <time.h>
#if defined(WIN32)
#include <winsock2.h>
#include <mstcpip.h>
#else
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#endif
#include "compat.h"
#include "miner.h"
#include "elist.h"
struct data_buffer {
void *buf;
size_t len;
};
struct upload_buffer {
const void *buf;
size_t len;
size_t pos;
};
struct header_info {
char *lp_path;
char *reason;
char *stratum_url;
};
struct tq_ent {
void *data;
struct list_head q_node;
};
struct thread_q {
struct list_head q;
bool frozen;
pthread_mutex_t mutex;
pthread_cond_t cond;
};
void applog(int prio, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
#ifdef HAVE_SYSLOG_H
if (use_syslog) {
va_list ap2;
char *buf;
int len;
va_copy(ap2, ap);
len = vsnprintf(NULL, 0, fmt, ap2) + 1;
va_end(ap2);
buf = alloca(len);
if (vsnprintf(buf, len, fmt, ap) >= 0)
syslog(prio, "%s", buf);
}
#else
if (0) {}
#endif
else {
char *f;
int len;
time_t now;
struct tm tm, *tm_p;
time(&now);
pthread_mutex_lock(&applog_lock);
tm_p = localtime(&now);
memcpy(&tm, tm_p, sizeof(tm));
pthread_mutex_unlock(&applog_lock);
len = 40 + strlen(fmt) + 2;
f = (char*)alloca(len);
sprintf(f, "[%d-%02d-%02d %02d:%02d:%02d] %s\n",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec,
fmt);
pthread_mutex_lock(&applog_lock);
vfprintf(stderr, f, ap); /* atomic write to stderr */
fflush(stderr);
pthread_mutex_unlock(&applog_lock);
}
va_end(ap);
}
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 = (struct data_buffer *)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((char*)db->buf + oldlen, ptr, len);
memcpy((char*)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 = (struct upload_buffer *)user_data;
unsigned int len = size * nmemb;
if (len > ub->len - ub->pos)
len = ub->len - ub->pos;
if (len) {
memcpy(ptr, (char*)ub->buf + ub->pos, len);
ub->pos += len;
}
return len;
}
#if LIBCURL_VERSION_NUM >= 0x071200
static int seek_data_cb(void *user_data, curl_off_t offset, int origin)
{
struct upload_buffer *ub = (struct upload_buffer *)user_data;
switch (origin) {
case SEEK_SET:
ub->pos = (size_t)offset;
break;
case SEEK_CUR:
ub->pos += (size_t)offset;
break;
case SEEK_END:
ub->pos = ub->len + (size_t)offset;
break;
default:
return 1; /* CURL_SEEKFUNC_FAIL */
}
return 0; /* CURL_SEEKFUNC_OK */
}
#endif
static size_t resp_hdr_cb(void *ptr, size_t size, size_t nmemb, void *user_data)
{
struct header_info *hi = (struct header_info *)user_data;
size_t remlen, slen, ptrlen = size * nmemb;
char *rem, *val = NULL, *key = NULL;
void *tmp;
val = (char*)calloc(1, ptrlen);
key = (char*)calloc(1, ptrlen);
if (!key || !val)
goto out;
tmp = memchr(ptr, ':', ptrlen);
if (!tmp || (tmp == ptr)) /* skip empty keys / blanks */
goto out;
slen = (size_t)((char*)tmp - (char*)ptr);
if ((slen + 1) == ptrlen) /* skip key w/ no value */
goto out;
memcpy(key, ptr, slen); /* store & nul term key */
key[slen] = 0;
rem = (char*)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 (!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;
}
if (!strcasecmp("X-Stratum", key)) {
hi->stratum_url = val; /* steal memory reference */
val = NULL;
}
out:
free(key);
free(val);
return ptrlen;
}
#if LIBCURL_VERSION_NUM >= 0x070f06
static int sockopt_keepalive_cb(void *userdata, curl_socket_t fd,
curlsocktype purpose)
{
int keepalive = 1;
int tcp_keepcnt = 3;
int tcp_keepidle = 50;
int tcp_keepintvl = 50;
#ifndef WIN32
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
json_t *json_rpc_call(CURL *curl, const char *url,
const char *userpass, const char *rpc_req,
bool longpoll_scan, bool longpoll, int *curl_err)
{
json_t *val, *err_val, *res_val;
int rc;
struct data_buffer all_data = {0};
struct upload_buffer upload_data;
json_error_t err;
struct curl_slist *headers = NULL;
char len_hdr[64];
char curl_err_str[CURL_ERROR_SIZE];
long timeout = longpoll ? opt_timeout : 30;
struct header_info hi = {0};
bool lp_scanning = longpoll_scan && !have_longpoll;
/* it is assumed that 'curl' is freshly [re]initialized at this pt */
if (opt_protocol)
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
if (opt_cert)
curl_easy_setopt(curl, CURLOPT_CAINFO, opt_cert);
curl_easy_setopt(curl, CURLOPT_ENCODING, "");
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
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);
#if LIBCURL_VERSION_NUM >= 0x071200
curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, &seek_data_cb);
curl_easy_setopt(curl, CURLOPT_SEEKDATA, &upload_data);
#endif
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_err_str);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, resp_hdr_cb);
curl_easy_setopt(curl, CURLOPT_HEADERDATA, &hi);
if (opt_proxy) {
curl_easy_setopt(curl, CURLOPT_PROXY, opt_proxy);
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, opt_proxy_type);
}
if (userpass) {
curl_easy_setopt(curl, CURLOPT_USERPWD, userpass);
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
}
#if LIBCURL_VERSION_NUM >= 0x070f06
if (longpoll)
curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_keepalive_cb);
#endif
curl_easy_setopt(curl, CURLOPT_POST, 1);
if (opt_protocol)
applog(LOG_DEBUG, "JSON protocol request:\n%s\n", rpc_req);
upload_data.buf = rpc_req;
upload_data.len = strlen(rpc_req);
upload_data.pos = 0;
sprintf(len_hdr, "Content-Length: %lu",
(unsigned long) upload_data.len);
headers = curl_slist_append(headers, "Content-Type: application/json");
headers = curl_slist_append(headers, len_hdr);
headers = curl_slist_append(headers, "User-Agent: " USER_AGENT);
headers = curl_slist_append(headers, "X-Mining-Extensions: midstate");
headers = curl_slist_append(headers, "Accept:"); /* disable Accept hdr*/
headers = curl_slist_append(headers, "Expect:"); /* disable Expect hdr*/
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
rc = curl_easy_perform(curl);
if (curl_err != NULL)
*curl_err = rc;
if (rc) {
if (!(longpoll && rc == CURLE_OPERATION_TIMEDOUT))
applog(LOG_ERR, "HTTP request failed: %s", curl_err_str);
goto err_out;
}
/* If X-Stratum was found, activate Stratum */
if (want_stratum && hi.stratum_url &&
!strncasecmp(hi.stratum_url, "stratum+tcp://", 14)) {
have_stratum = true;
tq_push(thr_info[stratum_thr_id].q, hi.stratum_url);
hi.stratum_url = NULL;
}
/* If X-Long-Polling was found, activate long polling */
if (lp_scanning && hi.lp_path && !have_stratum) {
have_longpoll = true;
tq_push(thr_info[longpoll_thr_id].q, hi.lp_path);
hi.lp_path = NULL;
}
if (!all_data.buf) {
applog(LOG_ERR, "Empty data received in json_rpc_call.");
goto err_out;
}
val = JSON_LOADS((const char*)all_data.buf, &err);
if (!val) {
applog(LOG_ERR, "JSON decode failed(%d): %s", err.line, err.text);
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_ERR, "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));
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_reset(curl);
return val;
err_out:
free(hi.lp_path);
free(hi.reason);
free(hi.stratum_url);
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_reset(curl);
return NULL;
}
char *bin2hex(const unsigned char *p, size_t len)
{
unsigned int i;
char *s = (char *)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)
{
char hex_byte[3];
char *ep;
hex_byte[2] = '\0';
while (*hexstr && len) {
if (!hexstr[1]) {
applog(LOG_ERR, "hex2bin str truncated");
return false;
}
hex_byte[0] = hexstr[0];
hex_byte[1] = hexstr[1];
*p = (unsigned char) strtol(hex_byte, &ep, 16);
if (*ep) {
applog(LOG_ERR, "hex2bin failed on '%s'", hex_byte);
return false;
}
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 uint32_t *hash, const uint32_t *target)
{
int i;
bool rc = true;
for (i = 7; i >= 0; i--) {
if (hash[i] > target[i]) {
rc = false;
break;
}
if (hash[i] < target[i]) {
rc = true;
break;
}
}
if (opt_debug) {
uint32_t hash_be[8], target_be[8];
char *hash_str, *target_str;
for (i = 0; i < 8; i++) {
be32enc(hash_be + i, hash[7 - i]);
be32enc(target_be + i, target[7 - i]);
}
hash_str = bin2hex((unsigned char *)hash_be, 32);
target_str = bin2hex((unsigned char *)target_be, 32);
applog(LOG_DEBUG, "DEBUG: %s\nHash: %s\nTarget: %s",
rc ? "hash <= target"
: "hash > target (false positive)",
hash_str,
target_str);
free(hash_str);
free(target_str);
}
return rc;
}
void diff_to_target(uint32_t *target, double diff)
{
uint64_t m;
int k;
for (k = 6; k > 0 && diff > 1.0; k--)
diff /= 4294967296.0;
m = (uint64_t)(4294901760.0 / diff);
if (m == 0 && k == 6)
memset(target, 0xff, 32);
else {
memset(target, 0, 32);
target[k] = (uint32_t)m;
target[k + 1] = (uint32_t)(m >> 32);
}
}
#ifdef WIN32
#define socket_blocks() (WSAGetLastError() == WSAEWOULDBLOCK)
#else
#define socket_blocks() (errno == EAGAIN || errno == EWOULDBLOCK)
#endif
static bool send_line(curl_socket_t sock, char *s)
{
ssize_t len, sent = 0;
len = strlen(s);
s[len++] = '\n';
while (len > 0) {
struct timeval timeout = {0, 0};
ssize_t n;
fd_set wd;
FD_ZERO(&wd);
FD_SET(sock, &wd);
if (select(sock + 1, NULL, &wd, NULL, &timeout) < 1)
return false;
n = send(sock, s + sent, len, 0);
if (n < 0) {
if (!socket_blocks())
return false;
n = 0;
}
sent += n;
len -= n;
}
return true;
}
bool stratum_send_line(struct stratum_ctx *sctx, char *s)
{
bool ret = false;
if (opt_protocol)
applog(LOG_DEBUG, "> %s", s);
pthread_mutex_lock(&sctx->sock_lock);
ret = send_line(sctx->sock, s);
pthread_mutex_unlock(&sctx->sock_lock);
return ret;
}
static bool socket_full(curl_socket_t sock, int timeout)
{
struct timeval tv;
fd_set rd;
FD_ZERO(&rd);
FD_SET(sock, &rd);
tv.tv_sec = timeout;
tv.tv_usec = 0;
if (select(sock + 1, &rd, NULL, NULL, &tv) > 0)
return true;
return false;
}
bool stratum_socket_full(struct stratum_ctx *sctx, int timeout)
{
return strlen(sctx->sockbuf) || socket_full(sctx->sock, timeout);
}
#define RBUFSIZE 2048
#define RECVSIZE (RBUFSIZE - 4)
static void stratum_buffer_append(struct stratum_ctx *sctx, const char *s)
{
size_t old, snew;
old = strlen(sctx->sockbuf);
snew = old + strlen(s) + 1;
if (snew >= sctx->sockbuf_size) {
sctx->sockbuf_size = snew + (RBUFSIZE - (snew % RBUFSIZE));
sctx->sockbuf = (char*)realloc(sctx->sockbuf, sctx->sockbuf_size);
}
strcpy(sctx->sockbuf + old, s);
}
char *stratum_recv_line(struct stratum_ctx *sctx)
{
ssize_t len, buflen;
char *tok, *sret = NULL;
if (!strchr(sctx->sockbuf, '\n')) {
bool ret = true;
time_t rstart;
time(&rstart);
if (!socket_full(sctx->sock, 60)) {
applog(LOG_ERR, "stratum_recv_line timed out");
goto out;
}
do {
char s[RBUFSIZE];
ssize_t n;
memset(s, 0, RBUFSIZE);
n = recv(sctx->sock, s, RECVSIZE, 0);
if (!n) {
ret = false;
break;
}
if (n < 0) {
if (!socket_blocks() || !socket_full(sctx->sock, 1)) {
ret = false;
break;
}
} else
stratum_buffer_append(sctx, s);
} while (time(NULL) - rstart < 60 && !strchr(sctx->sockbuf, '\n'));
if (!ret) {
applog(LOG_ERR, "stratum_recv_line failed");
goto out;
}
}
buflen = strlen(sctx->sockbuf);
tok = strchr(sctx->sockbuf, '\n');
if (!tok) {
applog(LOG_ERR, "stratum_recv_line failed to parse a newline-terminated string (length %d)", buflen);
sctx->sockbuf[0] = '\0';
goto out;
} else *tok = '\0';
sret = strdup(sctx->sockbuf);
len = strlen(sret);
if (buflen > len + 1)
memmove(sctx->sockbuf, sctx->sockbuf + len + 1, buflen - len);
else
sctx->sockbuf[0] = '\0';
out:
if (sret && opt_protocol)
applog(LOG_DEBUG, "< %s", sret);
return sret;
}
#if LIBCURL_VERSION_NUM >= 0x071101
static curl_socket_t opensocket_grab_cb(void *clientp, curlsocktype purpose,
struct curl_sockaddr *addr)
{
curl_socket_t *sock = (curl_socket_t *)clientp;
*sock = socket(addr->family, addr->socktype, addr->protocol);
return *sock;
}
#endif
bool stratum_connect(struct stratum_ctx *sctx, const char *url)
{
CURL *curl;
int rc;
pthread_mutex_lock(&sctx->sock_lock);
if (sctx->curl)
curl_easy_cleanup(sctx->curl);
sctx->curl = curl_easy_init();
if (!sctx->curl) {
applog(LOG_ERR, "CURL initialization failed");
pthread_mutex_unlock(&sctx->sock_lock);
return false;
}
curl = sctx->curl;
if (!sctx->sockbuf) {
sctx->sockbuf = (char*)calloc(RBUFSIZE, 1);
sctx->sockbuf_size = RBUFSIZE;
}
sctx->sockbuf[0] = '\0';
pthread_mutex_unlock(&sctx->sock_lock);
if (url != sctx->url) {
free(sctx->url);
sctx->url = strdup(url);
}
free(sctx->curl_url);
sctx->curl_url = (char*)malloc(strlen(url));
sprintf(sctx->curl_url, "http%s", strstr(url, "://"));
if (opt_protocol)
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_URL, sctx->curl_url);
curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1);
curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 30);
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, sctx->curl_err_str);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(curl, CURLOPT_TCP_NODELAY, 1);
if (opt_proxy && opt_proxy_type != CURLPROXY_HTTP) {
curl_easy_setopt(curl, CURLOPT_PROXY, opt_proxy);
curl_easy_setopt(curl, CURLOPT_PROXYTYPE, opt_proxy_type);
} else if (getenv("http_proxy")) {
if (getenv("all_proxy"))
curl_easy_setopt(curl, CURLOPT_PROXY, getenv("all_proxy"));
else if (getenv("ALL_PROXY"))
curl_easy_setopt(curl, CURLOPT_PROXY, getenv("ALL_PROXY"));
else
curl_easy_setopt(curl, CURLOPT_PROXY, "");
}
#if LIBCURL_VERSION_NUM >= 0x070f06
curl_easy_setopt(curl, CURLOPT_SOCKOPTFUNCTION, sockopt_keepalive_cb);
#endif
#if LIBCURL_VERSION_NUM >= 0x071101
curl_easy_setopt(curl, CURLOPT_OPENSOCKETFUNCTION, opensocket_grab_cb);
curl_easy_setopt(curl, CURLOPT_OPENSOCKETDATA, &sctx->sock);
#endif
curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 1);
rc = curl_easy_perform(curl);
if (rc) {
applog(LOG_ERR, "Stratum connection failed: %s", sctx->curl_err_str);
curl_easy_cleanup(curl);
sctx->curl = NULL;
return false;
}
#if LIBCURL_VERSION_NUM < 0x071101
/* CURLINFO_LASTSOCKET is broken on Win64; only use it as a last resort */
curl_easy_getinfo(curl, CURLINFO_LASTSOCKET, (long *)&sctx->sock);
#endif
return true;
}
void stratum_disconnect(struct stratum_ctx *sctx)
{
pthread_mutex_lock(&sctx->sock_lock);
if (sctx->curl) {
curl_easy_cleanup(sctx->curl);
sctx->curl = NULL;
sctx->sockbuf[0] = '\0';
}
pthread_mutex_unlock(&sctx->sock_lock);
}
static const char *get_stratum_session_id(json_t *val)
{
json_t *arr_val;
int i, n;
arr_val = json_array_get(val, 0);
if (!arr_val || !json_is_array(arr_val))
return NULL;
n = json_array_size(arr_val);
for (i = 0; i < n; i++) {
const char *notify;
json_t *arr = json_array_get(arr_val, i);
if (!arr || !json_is_array(arr))
break;
notify = json_string_value(json_array_get(arr, 0));
if (!notify)
continue;
if (!strcasecmp(notify, "mining.notify"))
return json_string_value(json_array_get(arr, 1));
}
return NULL;
}
bool stratum_subscribe(struct stratum_ctx *sctx)
{
char *s, *sret = NULL;
const char *sid, *xnonce1;
int xn2_size;
json_t *val = NULL, *res_val, *err_val;
json_error_t err;
bool ret = false, retry = false;
start:
s = (char*)malloc(128 + (sctx->session_id ? strlen(sctx->session_id) : 0));
if (retry)
sprintf(s, "{\"id\": 1, \"method\": \"mining.subscribe\", \"params\": []}");
else if (sctx->session_id)
sprintf(s, "{\"id\": 1, \"method\": \"mining.subscribe\", \"params\": [\"" USER_AGENT "\", \"%s\"]}", sctx->session_id);
else
sprintf(s, "{\"id\": 1, \"method\": \"mining.subscribe\", \"params\": [\"" USER_AGENT "\"]}");
if (!stratum_send_line(sctx, s))
goto out;
if (!socket_full(sctx->sock, 30)) {
applog(LOG_ERR, "stratum_subscribe timed out");
goto out;
}
sret = stratum_recv_line(sctx);
if (!sret)
goto out;
val = JSON_LOADS(sret, &err);
free(sret);
if (!val) {
applog(LOG_ERR, "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");
if (!res_val || json_is_null(res_val) ||
(err_val && !json_is_null(err_val))) {
if (opt_debug || retry) {
free(s);
if (err_val)
s = json_dumps(err_val, JSON_INDENT(3));
else
s = strdup("(unknown reason)");
applog(LOG_ERR, "JSON-RPC call failed: %s", s);
}
goto out;
}
sid = get_stratum_session_id(res_val);
if (opt_debug && !sid)
applog(LOG_DEBUG, "Failed to get Stratum session id");
xnonce1 = json_string_value(json_array_get(res_val, 1));
if (!xnonce1) {
applog(LOG_ERR, "Failed to get extranonce1");
goto out;
}
xn2_size = json_integer_value(json_array_get(res_val, 2));
if (!xn2_size) {
applog(LOG_ERR, "Failed to get extranonce2_size");
goto out;
}
pthread_mutex_lock(&sctx->work_lock);
free(sctx->session_id);
free(sctx->xnonce1);
sctx->session_id = sid ? strdup(sid) : NULL;
sctx->xnonce1_size = strlen(xnonce1) / 2;
sctx->xnonce1 = (unsigned char*)malloc(sctx->xnonce1_size);
hex2bin(sctx->xnonce1, xnonce1, sctx->xnonce1_size);
sctx->xnonce2_size = xn2_size;
sctx->next_diff = 1.0;
pthread_mutex_unlock(&sctx->work_lock);
if (opt_debug && sid)
applog(LOG_DEBUG, "Stratum session id: %s", sctx->session_id);
ret = true;
out:
free(s);
if (val)
json_decref(val);
if (!ret) {
if (sret && !retry) {
retry = true;
goto start;
}
}
return ret;
}
bool stratum_authorize(struct stratum_ctx *sctx, const char *user, const char *pass)
{
json_t *val = NULL, *res_val, *err_val;
char *s, *sret;
json_error_t err;
bool ret = false;
s = (char*)malloc(80 + strlen(user) + strlen(pass));
sprintf(s, "{\"id\": 2, \"method\": \"mining.authorize\", \"params\": [\"%s\", \"%s\"]}",
user, pass);
if (!stratum_send_line(sctx, s))
goto out;
while (1) {
sret = stratum_recv_line(sctx);
if (!sret)
goto out;
if (!stratum_handle_method(sctx, sret))
break;
free(sret);
}
val = JSON_LOADS(sret, &err);
free(sret);
if (!val) {
applog(LOG_ERR, "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");
if (!res_val || json_is_false(res_val) ||
(err_val && !json_is_null(err_val))) {
applog(LOG_ERR, "Stratum authentication failed");
goto out;
}
ret = true;
out:
free(s);
if (val)
json_decref(val);
return ret;
}
static bool stratum_notify(struct stratum_ctx *sctx, json_t *params)
{
const char *job_id, *prevhash, *coinb1, *coinb2, *version, *nbits, *ntime;
size_t coinb1_size, coinb2_size;
bool clean, ret = false;
int merkle_count, i;
json_t *merkle_arr;
unsigned char **merkle;
job_id = json_string_value(json_array_get(params, 0));
prevhash = json_string_value(json_array_get(params, 1));
coinb1 = json_string_value(json_array_get(params, 2));
coinb2 = json_string_value(json_array_get(params, 3));
merkle_arr = json_array_get(params, 4);
if (!merkle_arr || !json_is_array(merkle_arr))
goto out;
merkle_count = json_array_size(merkle_arr);
version = json_string_value(json_array_get(params, 5));
nbits = json_string_value(json_array_get(params, 6));