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util.cpp
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/*
* Copyright 2010 Jeff Garzik
* Copyright 2012-2014 pooler
* Copyright 2014 ccminer team
*
* 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 <cstdio>
#include <cstdlib>
#include <ctype.h>
#include <cstdarg>
#include <cstring>
#include <cinttypes>
using namespace std;
#include <unistd.h>
#include <jansson.h>
#include <curl/curl.h>
#include <ctime>
#ifdef WIN32
#include "compat/winansi.h"
#include <winsock2.h>
#include <mstcpip.h>
#else
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#endif
#include "miner.h"
#include "elist.h"
extern enum sha_algos opt_algo;
extern char curl_err_str[];
extern bool stop_mining;
extern bool send_stale;
extern const char *algo_names[];
extern bool opt_logfile;
extern FILE *logfilepointer;
bool opt_tracegpu = false;
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;
};
// input and output may point to the same location
void hexstringreverse(void *output, const void *input, size_t length)
{
uint16_t tmp1;
uint16_t tmp2;
for(size_t i = 0; i < length / 4; i++)
{
tmp1 = *(((uint16_t*)input) + i);
tmp2 = *(((uint16_t*)output) + (length / 2 - i));
*(((uint16_t*)input) + i) = tmp2;
*(((uint16_t*)output) + (length / 2 - i)) = tmp1;
}
}
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;
/* custom colors to syslog prio */
if(prio > LOG_DEBUG)
{
switch(prio)
{
case LOG_BLUE: prio = LOG_NOTICE; break;
case LOG_HW: prio = LOG_INFO; break;
}
}
va_copy(ap2, ap);
len = vsnprintf(NULL, 0, fmt, ap2) + 1;
va_end(ap2);
buf = (char*)malloc(len);
if(vsnprintf(buf, len, fmt, ap) >= 0)
syslog(prio, "%s", buf);
free(buf);
}
#else
if(0)
{
}
#endif
else
{
const char* color = "";
char f[16000];
struct tm tm, *tm_p;
time_t now = time(NULL);
pthread_mutex_lock(&applog_lock);
tm_p = localtime(&now);
memcpy(&tm, tm_p, sizeof(tm));
pthread_mutex_unlock(&applog_lock);
switch(prio)
{
case LOG_ERR: color = CL_RED; break;
case LOG_WARNING: color = CL_YLW; break;
case LOG_NOTICE: color = CL_WHT; break;
case LOG_INFO: color = ""; break;
case LOG_DEBUG: color = CL_GRY; break;
case LOG_HW:
color = CL_MAG;
prio = LOG_INFO;
break;
case LOG_BLUE:
prio = LOG_NOTICE;
color = CL_CYN;
break;
}
if(!use_colors)
color = "";
pthread_mutex_lock(&applog_lock);
snprintf(f, sizeof(f), "[%d-%02d-%02d %02d:%02d:%02d]%s %s%s\n",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec,
color,
fmt,
use_colors ? CL_N : ""
);
vfprintf(stdout, f, ap); /* atomic write to stderr */
fflush(stdout);
if (opt_logfile)
{
snprintf(f, sizeof(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
);
vfprintf(logfilepointer, f, ap); /* atomic write to logfile */
fflush(logfilepointer);
}
pthread_mutex_unlock(&applog_lock);
}
va_end(ap);
}
extern int gpu_threads;
// Use different prefix if multiple cpu threads per gpu
// Also, auto hide LOG_DEBUG if --debug (-D) is not used
void gpulog(int prio, int thr_id, const char *fmt, ...)
{
char _ALIGN(128) pfmt[128];
char _ALIGN(128) line[256];
int len, dev_id = device_map[thr_id % MAX_GPUS];
va_list ap;
if(prio == LOG_DEBUG && !opt_debug)
return;
if(gpu_threads > 1)
len = snprintf(pfmt, 128, "GPU T%d: %s", thr_id, fmt);
else
len = snprintf(pfmt, 128, "GPU #%d: %s", dev_id, fmt);
pfmt[sizeof(pfmt) - 1] = '\0';
va_start(ap, fmt);
if(len && vsnprintf(line, sizeof(line), pfmt, ap))
{
line[sizeof(line) - 1] = '\0';
applog(prio, "%s", line);
}
else
{
fprintf(stdout, "%s OOM!\n", __func__);
}
va_end(ap);
}
void format_hashrate(double hashrate, char *output)
{
char prefix = '\0';
if(hashrate < 10000)
{
// nop
}
else if(hashrate < 1e7)
{
prefix = 'k';
hashrate *= 1e-3;
}
else if(hashrate < 1e10)
{
prefix = 'M';
hashrate *= 1e-6;
}
else if(hashrate < 1e13)
{
prefix = 'G';
hashrate *= 1e-9;
}
else
{
prefix = 'T';
hashrate *= 1e-12;
}
sprintf(
output,
prefix ? "%.2f %cH/s" : "%.2f H/s%c",
hashrate, prefix
);
}
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 uchar zero = 0;
oldlen = db->len;
newlen = oldlen + len;
newmem = realloc(db->buf, newlen + 1);
if(newmem == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
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 = (unsigned int)(size * nmemb);
if(len > ub->len - ub->pos)
len = (unsigned int)(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);
if(val == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
key = (char*)calloc(1, ptrlen);
if(key == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
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; /* X-Mining-Extensions: longpoll */
val = NULL;
}
if(!strcasecmp("X-Reject-Reason", key))
{
hi->reason = val; /* X-Mining-Extensions: reject-reason */
//applog(LOG_WARNING, "%s:%s", key, val);
val = NULL;
}
if(!strcasecmp("X-Stratum", key))
{
hi->stratum_url = val; /* steal memory reference */
val = NULL;
}
if(!strcasecmp("X-Nonce-Range", key))
{
/* todo when available: X-Mining-Extensions: noncerange */
}
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;
#ifdef WIN32
DWORD outputBytes;
#endif
#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;
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;
CURLcode rc;
struct data_buffer all_data = { 0 };
struct upload_buffer upload_data;
json_error_t err;
struct curl_slist *headers = NULL;
char* httpdata;
char len_hdr[64], hashrate_hdr[64];
long timeout = opt_timeout;
struct header_info hi = { 0 };
bool lp_scanning = longpoll_scan && !have_longpoll;
/* it is assumed that 'curl' is freshly [re]initialized at this pt */
curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_err_str);
if(opt_protocol)
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
rc = curl_easy_setopt(curl, CURLOPT_URL, url);
if(rc != CURLE_OK)
{
if(strlen(curl_err_str)>0)
applog(LOG_ERR, "CURLOPT_URL error: %s", curl_err_str);
else
applog(LOG_ERR, "CURLOPT_URL error: %s", curl_easy_strerror(rc));
curl_easy_reset(curl);
return NULL;
}
if(opt_cert)
curl_easy_setopt(curl, CURLOPT_CAINFO, opt_cert);
curl_easy_setopt(curl, CURLOPT_ENCODING, "");
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 0);
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_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", 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);
sprintf(hashrate_hdr, "X-Mining-Hashrate: %llu", (unsigned long long) global_hashrate);
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: longpoll noncerange reject-reason");
headers = curl_slist_append(headers, hashrate_hdr);
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);
curl_err_str[0] = 0;
rc = curl_easy_perform(curl);
if(curl_err != NULL)
*curl_err = rc;
if(rc != CURLE_OK)
{
if(!(longpoll && rc == CURLE_OPERATION_TIMEDOUT))
{
if(strlen(curl_err_str)>0)
applog(LOG_ERR, "HTTP request failed: %s", curl_err_str);
else
applog(LOG_ERR, "HTTP request failed: %s", curl_easy_strerror(rc));
goto err_out;
}
}
/* If X-Stratum was found, activate Stratum */
if(want_stratum && hi.stratum_url &&
!strncasecmp(hi.stratum_url, "stratum+tcp://", 14) &&
!(opt_proxy && opt_proxy_type == CURLPROXY_HTTP))
{
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 || !all_data.len)
{
applog(LOG_ERR, "Empty data received in json_rpc_call.");
goto err_out;
}
httpdata = (char*)all_data.buf;
if(*httpdata != '{' && *httpdata != '[')
{
long errcode = 0;
CURLcode c = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &errcode);
if(c == CURLE_OK && errcode == 401)
{
applog(LOG_ERR, "You are not authorized, check your login and password.");
goto err_out;
}
}
val = JSON_LOADS(httpdata, &err);
if(!val)
{
applog(LOG_ERR, "JSON decode failed(%d): %s", err.line, err.text);
if(opt_protocol)
applog(LOG_DEBUG, "%s", httpdata);
goto err_out;
}
if(opt_protocol)
{
char *s = json_dumps(val, JSON_INDENT(3));
applog(LOG_DEBUG, "JSON protocol response:\n%s\n", 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 = NULL;
if(err_val)
{
s = json_dumps(err_val, 0);
json_t *msg = json_object_get(err_val, "message");
json_t *err_code = json_object_get(err_val, "code");
if(curl_err && json_integer_value(err_code))
*curl_err = (int)json_integer_value(err_code);
if(json_is_string(msg))
{
free(s);
s = strdup(json_string_value(msg));
if(have_longpoll && s && !strcmp(s, "method not getwork"))
{
json_decref(err_val);
free(s);
goto err_out;
}
}
json_decref(err_val);
}
else
s = strdup("(unknown reason)");
if(!curl_err || opt_debug)
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;
}
/**
* Unlike malloc, calloc set the memory to zero
void *aligned_calloc(int size)
{
const int ALIGN = 64; // cache line
#ifdef _MSC_VER
void* res = _aligned_malloc(size, ALIGN);
if(res == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
memset(res, 0, size);
return res;
#else
void *mem = calloc(1, size + ALIGN + sizeof(uintptr_t));
if(mem == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
void **ptr = (void**)((size_t)(((uintptr_t)(mem)) + ALIGN + sizeof(uintptr_t)) & ~(ALIGN - 1));
ptr[-1] = mem;
return ptr;
#endif
}
void aligned_free(void *ptr)
{
#ifdef _MSC_VER
_aligned_free(ptr);
#else
free(((void**)ptr)[-1]);
#endif
}
*/
void cbin2hex(char *out, const char *in, size_t len)
{
if(out)
{
unsigned int i;
for(i = 0; i < len; i++)
sprintf(out + (i * 2), "%02x", (uint8_t)in[i]);
}
}
char *bin2hex(const uchar *in, size_t len)
{
char *s = (char*)malloc((len * 2) + 1);
if(s == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
cbin2hex(s, (const char *)in, len);
return s;
}
bool hex2bin(uchar *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 = (uchar)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)
{
uint64_t start, end;
end = x->tv_usec + 1000000 * x->tv_sec;
start = y->tv_usec + 1000000 * y->tv_sec;
if(start <= end)
{
uint64_t diff = end - start;
result->tv_sec = (long)(diff / 1000000);
result->tv_usec = diff % 1000000;
}
else
{
result->tv_sec = 0;
result->tv_usec = 0;
}
/* Return 1 if result is negative. */
return (start > end);
}
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(hash[1] == target[1])
{
applog(LOG_NOTICE, "We found a close match!");
}
}
if(!rc && 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((uchar *)hash_be, 32);
target_str = bin2hex((uchar *)target_be, 32);
applog(LOG_DEBUG, "DEBUG: %s\nHash: %s\nTarget: %s",
rc ? "hash <= target"
: CL_YLW "hash > target (false positive)" CL_N,
hash_str,
target_str);
free(hash_str);
free(target_str);
}
return rc;
}
bool fulltest_sia(const uint64_t *hash, const uint64_t *target)
{
int i;
bool rc = true;
for(i = 0; i < 4; i--)
{
if(swab64(hash[i]) > target[3 - i])
{
rc = false;
break;
}
if(swab64(hash[i]) < target[3 - i])
{
rc = true;
break;
}
}
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 = (ssize_t)strlen(s);
s[len++] = '\n';
while(len > 0)
{
struct timeval timeout;
int n;
fd_set wd;
timeout.tv_sec = 3;
timeout.tv_usec = 0;
FD_ZERO(&wd);
FD_SET(sock, &wd);
if(select((int)sock + 1, NULL, &wd, NULL, &timeout) < 1)
return false;
n = send(sock, s + sent, (int)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((int)sock + 1, &rd, NULL, NULL, &tv) > 0)
return true;
return false;
}
bool stratum_socket_full(struct stratum_ctx *sctx, int timeout)
{
if(!sctx->sockbuf)
return false;
else
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);
if(sctx->sockbuf == NULL)
{
applog(LOG_ERR, "Out of memory!");
proper_exit(EXIT_FAILURE);
}
}
strcpy(sctx->sockbuf + old, s);
}
char *stratum_recv_line(struct stratum_ctx *sctx)
{
size_t len, buflen;
char *tok, *sret = NULL;
int timeout = opt_timeout;
if(!sctx->sockbuf)
return NULL;
if(!strstr(sctx->sockbuf, "\n"))
{
bool ret = true;
time_t rstart = time(NULL);
if(!socket_full(sctx->sock, timeout))
{
if(!stop_mining)