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/*
* 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 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 <string.h>
#include <jansson.h>
#include <curl/curl.h>
#include "miner.h"
struct data_buffer {
void *buf;
size_t len;
};
struct upload_buffer {
const void *buf;
size_t len;
};
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;
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;
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;
}
json_t *json_rpc_call(const char *url, const char *userpass, const char *rpc_req)
{
CURL *curl;
json_t *val;
int rc;
struct data_buffer all_data = { };
struct upload_buffer upload_data;
json_error_t err = { };
struct curl_slist *headers = NULL;
char len_hdr[64];
curl = curl_easy_init();
if (!curl)
return NULL;
if (opt_protocol)
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_ENCODING, "");
curl_easy_setopt(curl, CURLOPT_FAILONERROR, 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 (userpass) {
curl_easy_setopt(curl, CURLOPT_USERPWD, userpass);
curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
}
curl_easy_setopt(curl, CURLOPT_POST, 1);
if (opt_protocol)
printf("JSON protocol request:\n%s\n", rpc_req);
upload_data.buf = rpc_req;
upload_data.len = strlen(rpc_req);
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, "Expect:"); /* disable Expect hdr*/
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
rc = curl_easy_perform(curl);
if (rc)
goto err_out;
val = json_loads(all_data.buf, &err);
if (!val) {
fprintf(stderr, "JSON failed(%d): %s\n", err.line, err.text);
goto err_out;
}
if (opt_protocol) {
char *s = json_dumps(val, JSON_INDENT(3));
printf("JSON protocol response:\n%s\n", s);
free(s);
}
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
return val;
err_out:
databuf_free(&all_data);
curl_slist_free_all(headers);
curl_easy_cleanup(curl);
return NULL;
}
char *bin2hex(unsigned char *p, size_t len)
{
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]) {
fprintf(stderr, "hex2bin str truncated\n");
return false;
}
hex_byte[0] = hexstr[0];
hex_byte[1] = hexstr[1];
hex_byte[2] = 0;
if (sscanf(hex_byte, "%x", &v) != 1) {
fprintf(stderr, "hex2bin sscanf '%s' failed\n",
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;
}
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