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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2005, 2007, 2013
*
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifndef __APPLE__
#include <limits.h>
#else
#define HOST_NAME_MAX 64
#endif
#include <bits/posix1_lim.h>
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "tsplog.h"
#include "spi_utils.h"
#include "tsp_tcsi_param.h"
#define RV_OK 0
#define RV_NO_VALUE -1
#define RV_NO_MEM -2
#define RV_WRONG_VALUE -3
#define RV_UNKNOWN_ERR -4
int
get_port_from_env(int *port)
{
char *env_port;
char *raw_port_str;
env_port = getenv(PORT_ENV_VAR);
if (env_port == NULL)
return RV_NO_VALUE;
raw_port_str = strdup(env_port);
if (raw_port_str == NULL)
return RV_NO_MEM;
LogDebug("Found data in %s environment var: %s", PORT_ENV_VAR, raw_port_str);
*port = atoi(raw_port_str);
free(raw_port_str);
if (*port < 0 || *port > 65535) {
LogError("Environment var %s contains invalid port value!", PORT_ENV_VAR);
return RV_WRONG_VALUE;
}
return RV_OK;
}
TSS_RESULT
convert_port_to_str(int port, char port_str[TCP_PORT_STR_MAX_LEN])
{
if (snprintf(port_str, TCP_PORT_STR_MAX_LEN, "%d", port) < 0)
return TSPERR(TSS_E_INTERNAL_ERROR);
return TSS_SUCCESS;
}
TSS_RESULT
get_tcsd_port(char port_str[TCP_PORT_STR_MAX_LEN])
{
int rv, port = 0;
// Retrieves port from env var first
rv = get_port_from_env(&port);
switch(rv) {
case RV_OK:
return convert_port_to_str(port, port_str);
case RV_WRONG_VALUE:
return TSPERR(TSS_E_BAD_PARAMETER);
case RV_NO_MEM:
return TSPERR(TSS_E_OUTOFMEMORY);
case RV_NO_VALUE:
break;
}
// TODO: Future work retrieves port from config file.
// Last case, retrieve default port used by server.
return convert_port_to_str(TCSD_DEFAULT_PORT, port_str);
}
/**
* Allocates a string with up to _POSIX_HOST_NAME_MAX chars which contains
* the hostname extracted from the env var
*/
int
get_hostname_from_env(char **host_str, unsigned *len)
{
char *env_host, *tmp_str = NULL;
unsigned env_len;
// Tries to retrieve from env var first.
env_host = getenv(HOSTNAME_ENV_VAR);
if (env_host == NULL) {
*host_str = NULL;
*len = 0;
LogDebug("Got no value inside environment var %s.", HOSTNAME_ENV_VAR);
return RV_NO_VALUE;
}
tmp_str = strdup(env_host);
if (tmp_str == NULL)
return RV_NO_MEM;
LogDebug("Environment var %s got value: %s", HOSTNAME_ENV_VAR, tmp_str);
env_len = strlen(tmp_str);
if (env_len > _POSIX_HOST_NAME_MAX) {
*len = _POSIX_HOST_NAME_MAX + 1;
} else {
*len = env_len + 1;
}
*host_str = (char *)malloc(*len);
if (*host_str == NULL) {
LogError("Not enough memory when allocating string to retrieve host name from environment var");
free(tmp_str);
return RV_NO_MEM;
}
strncpy(*host_str, tmp_str, *len);
free(tmp_str);
return RV_OK;
}
TSS_RESULT
get_tcsd_hostname(char **host_str, unsigned *len)
{
int rv;
// Retrieve from environment var
rv = get_hostname_from_env(host_str, len);
switch(rv) {
case RV_OK:
LogDebug("Hostname %s will be used", *host_str);
return TSS_SUCCESS;
case RV_NO_MEM:
return TSPERR(TSS_E_OUTOFMEMORY);
case RV_NO_VALUE: // Tente obter de outra maneira
break;
default:
return TSPERR(TSS_E_INTERNAL_ERROR);
}
// TODO: Future work - Retrieve from config file
// Use localhost in last case.
*host_str = strdup(TSS_LOCALHOST_STRING);
if (*host_str == NULL)
return TSPERR(TSS_E_OUTOFMEMORY);
*len = sizeof(TSS_LOCALHOST_STRING);
LogDebug("Hostname %s will be used", *host_str);
return TSS_SUCCESS;
}
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