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Copy pathnetclient.c
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316 lines (273 loc) · 7.28 KB
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#ifndef __GNUC__
#pragma code_seg( "RTV_TEXT" )
#pragma data_seg( "RTV_DATA" )
#pragma bss_seg( "RTV_BSS" )
#pragma const_seg( "RTV_RD" )
#endif
/*
* Copyright (C) 2002 John Todd Larason <jtl@molehill.org>
*
* Parts based on ReplayPC 0.3 by Matthew T. Linehan and others
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "netclient.h"
#include "rtv.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
//#include <netdb.h>
#ifdef _XBOX
# include <Xtl.h>
typedef SOCKET socket_fd;
struct hostent {
char * h_name; /* official name of host */
char * * h_aliases; /* alias list */
short h_addrtype; /* host address type */
short h_length; /* length of address */
char * * h_addr_list; /* list of addresses */
#define h_addr h_addr_list[0] /* address, for backward compat */
};
struct hostent * gethostbyname(const char * name);
#elif defined _WIN32
# include <winsock2.h>
# pragma comment(lib, "ws2_32.lib")
typedef SOCKET socket_fd;
#else
# include <unistd.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
# define closesocket(fd) close(fd)
typedef int socket_fd;
# define INVALID_SOCKET (-1)
#include <netdb.h>
#endif
#ifndef MIN
#define MIN(x,y) ((x)<(y) ? (x) : (y))
#endif
static int nc_do_dump = 0;
static int nc_initted = 0;
struct nc
{
u8 rcv_buf[32768];
size_t low, high;
socket_fd fd;
};
static void nc_fini(void)
{
nc_initted = 0;
#ifdef _WIN32
WSACleanup();
#endif
}
static void nc_dump(char * tag, unsigned char * buf, size_t sz)
{
#if 0
unsigned int rows, row, col, i, c;
if (!nc_do_dump)
return;
//fprintf(stderr, "NC DUMP: %s %lu\n", tag, (unsigned long)sz);
if (buf == NULL)
return;
rows = (sz + 15)/16;
for (row = 0; row < rows; row++) {
//fprintf(stderr, "| ");
for (col = 0; col < 16; col++) {
i = row * 16 + col;
//if (i < sz)
// fprintf(stderr, "%02x", buf[i]);
//else
// fprintf(stderr, " ");
//if ((i & 3) == 3)
// fprintf(stderr, " ");
}
fprintf(stderr, " | ");
for (col = 0; col < 16; col++) {
i = row * 16 + col;
if (i < sz) {
c = buf[i];
fprintf(stderr, "%c", (c >= ' ' && c <= '~') ? c : '.');
} else {
fprintf(stderr, " ");
}
if ((i & 3) == 3)
fprintf(stderr, " ");
}
fprintf(stderr, " |\n");
}
#endif
}
void nc_error(char * where)
{
#ifdef _WIN32
//fprintf(stderr, "NC error:%s:%d/%d\n", where, errno, WSAGetLastError());
#else
//fprintf(stderr, "NC error:%s:%d:%s\n", where, errno, strerror(errno));
#endif
}
static int nc_init(void)
{
#ifdef _WIN32
WSADATA wd;
nc_dump("initting", NULL, 0);
if (WSAStartup(MAKEWORD(2,2), &wd) == -1) {
nc_error("WSAStartup");
return -1;
}
#endif
nc_initted = 1;
//if (getenv("NC_DUMP"))
// nc_do_dump = 1;
atexit(nc_fini);
return 0;
}
static unsigned long parse_addr(const char *address_str)
{
unsigned long addr;
struct hostent *hent;
addr = inet_addr(address_str);
if (addr != INADDR_NONE)
return addr;
nc_dump("looking up address", NULL, 0);
hent = gethostbyname(address_str);
if (!hent) {
//herror(address_str);
return INADDR_NONE;
}
if (hent->h_addrtype == AF_INET && hent->h_addr_list[0] != NULL) {
memcpy(&addr, hent->h_addr_list[0], sizeof(addr));
return addr;
}
//fprintf(stderr, "No IPv4 address for %s\n", address_str);
return INADDR_NONE;
}
struct nc * nc_open(char * address_str, short port)
{
struct nc * nc;
struct sockaddr_in address;
if (!nc_initted) {
if (nc_init()) {
//fprintf(stderr, "Couldn't initialize netclient library\n");
return NULL;
}
}
nc = malloc(sizeof *nc);
if (!nc) {
//fprintf(stderr, "Couldn't allocate memory for struct nc\n");
return NULL;
}
memset(nc, 0, sizeof *nc);
nc->fd = -1;
memset(&address, 0, sizeof address);
address.sin_family = AF_INET;
address.sin_port = htons(port);
address.sin_addr.s_addr = parse_addr(address_str);
if (address.sin_addr.s_addr == INADDR_NONE) {
//fprintf(stderr, "Couldn't determine address for \"%s\"\n", address_str);
return NULL;
}
nc_dump("creating socket", NULL, 0);
nc->fd = socket(AF_INET, SOCK_STREAM, 0);
if (nc->fd == INVALID_SOCKET) {
nc_error("open_nc socket");
return NULL;
}
nc_dump("created", NULL, 0);
nc_dump("connecting", NULL, 0);
if (connect(nc->fd, (struct sockaddr *)&address, sizeof(address)) == -1) {
nc_error("open_nc connect");
return NULL;
}
nc_dump("connected", NULL, 0);
return nc;
}
int nc_close(struct nc * nc)
{
int r = 0;
if (nc->fd >= 0) {
nc_dump("closing", NULL, 0);
r = closesocket(nc->fd);
nc_dump("closed", NULL, 0);
}
free(nc);
return r;
}
static void fill_rcv_buf(struct nc * nc)
{
int r;
nc_dump("receiving...", NULL, 0);
r = recv(nc->fd, nc->rcv_buf, sizeof(nc->rcv_buf), 0);
nc->low = 0;
if (r <= 0) {
if (r < 0)
nc_error("fill_rcv_buf recv");
/* XXX -- error or closed, return whatever we got*/
nc->high = 0;
} else {
nc->high = r;
}
nc_dump("received", nc->rcv_buf, nc->high);
}
int nc_read(struct nc * nc, unsigned char * buf, size_t len)
{
size_t l;
int r = 0;
nc_dump("Reading", NULL, len);
while (len) {
if (nc->high == nc->low) {
fill_rcv_buf(nc);
}
if (nc->high == 0) {
nc_dump("Read", buf, r);
return r;
}
l = MIN(len, nc->high - nc->low);
memcpy(buf + r, nc->rcv_buf + nc->low, l);
len -= l;
r += l;
nc->low += l;
}
nc_dump("Read", buf, r);
return r;
}
int nc_read_line(struct nc * nc, unsigned char * buf, size_t maxlen)
{
size_t r = 0;
nc_dump("Reading line", NULL, maxlen);
while (r < maxlen) {
if (nc_read(nc, buf + r, 1) <= 0) {
return r;
}
if (buf[r] == '\012') {
buf[r] = '\0';
if (r > 0 && buf[r-1] == '\015') {
r--;
buf[r] = '\0';
}
nc_dump("Read line", buf, r);
return r;
}
r++;
}
nc_dump("Read line", buf, r);
return r;
}
int nc_write(struct nc * nc, unsigned char * buf, size_t len)
{
int r;
nc_dump("sending...", buf, len);
r = send(nc->fd, buf, len, 0);
if (r < 0)
nc_error("nc_write");
nc_dump("sent", NULL, 0);
return r;
}