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Support TCP ports for proxmark (#720)

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On ChromeOS Linux apps can't access serial port but they can connect to TCP,
so I wrote a simple app to forward TCP to serial. I suppose this can
have other uses as well.
This commit is contained in:
Vladimir Serbinenko 2018-12-03 08:53:26 +01:00 • committed by pwpiwi
commit d664113aee
1 changed files with 61 additions and 3 deletions
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64
uart/uart_posix.c
View file

@ -2,6 +2,7 @@
* Generic uart / rs232/ serial port library * Generic uart / rs232/ serial port library
* *
* Copyright (c) 2013, Roel Verdult * Copyright (c) 2013, Roel Verdult
* Copyright (c) 2018 Google
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -32,10 +33,12 @@
* proxmark3 project. * proxmark3 project.
*/ */
#include "uart.h"
// Test if we are dealing with posix operating systems // Test if we are dealing with posix operating systems
#ifndef _WIN32 #ifndef _WIN32
#define _DEFAULT_SOURCE
#include "uart.h"
#include <termios.h> #include <termios.h>
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <unistd.h> #include <unistd.h>
@ -45,6 +48,12 @@
#include <limits.h> #include <limits.h>
#include <sys/time.h> #include <sys/time.h>
#include <errno.h> #include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
typedef struct termios term_info; typedef struct termios term_info;
typedef struct { typedef struct {
@ -56,7 +65,7 @@ typedef struct {
// Set time-out on 30 miliseconds // Set time-out on 30 miliseconds
const struct timeval timeout = { const struct timeval timeout = {
.tv_sec = 0, // 0 second .tv_sec = 0, // 0 second
.tv_usec = 30000 // 30000 micro seconds .tv_usec = 300000 // 300000 micro seconds
}; };
serial_port uart_open(const char* pcPortName) serial_port uart_open(const char* pcPortName)
@ -64,6 +73,55 @@ serial_port uart_open(const char* pcPortName)
serial_port_unix* sp = malloc(sizeof(serial_port_unix)); serial_port_unix* sp = malloc(sizeof(serial_port_unix));
if (sp == 0) return INVALID_SERIAL_PORT; if (sp == 0) return INVALID_SERIAL_PORT;
if (memcmp(pcPortName, "tcp:", 4) == 0) {
struct addrinfo *addr, *rp;
char *addrstr = strdup(pcPortName + 4);
if (addrstr == NULL) {
printf("Error: strdup\n");
return INVALID_SERIAL_PORT;
}
char *colon = strrchr(addrstr, ':');
char *portstr;
if (colon) {
portstr = colon + 1;
*colon = '\0';
} else
portstr = "7901";
int s = getaddrinfo(addrstr, portstr, NULL, &addr);
if (s != 0) {
printf("Error: getaddrinfo: %s\n", gai_strerror(s));
return INVALID_SERIAL_PORT;
}
int sfd;
for (rp = addr; rp != NULL; rp = rp->ai_next) {
sfd = socket(rp->ai_family, rp->ai_socktype,
rp->ai_protocol);
if (sfd == -1)
continue;
if (connect(sfd, rp->ai_addr, rp->ai_addrlen) != -1)
break;
close(sfd);
}
if (rp == NULL) { /* No address succeeded */
printf("Error: Could not connect\n");
return INVALID_SERIAL_PORT;
}
freeaddrinfo(addr);
free(addrstr);
sp->fd = sfd;
int one = 1;
setsockopt(sp->fd, SOL_TCP, TCP_NODELAY, &one, sizeof(one));
return sp;
}
sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK); sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);
if(sp->fd == -1) { if(sp->fd == -1) {
uart_close(sp); uart_close(sp);