/*

 * wpa_supplicant/hostapd / Debug prints

 * Copyright (c) 2002-2013, Jouni Malinen <j@w1.fi>

 *

 * This software may be distributed under the terms of the BSD license.

 * See README for more details.

 */

#include "includes.h"

#include "common.h"

#ifdef CONFIG_DEBUG_SYSLOG

#include <syslog.h>

#endif /* CONFIG_DEBUG_SYSLOG */

#ifdef CONFIG_DEBUG_LINUX_TRACING

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#include <string.h>

#include <stdio.h>

static FILE *wpa_debug_tracing_file = NULL;

#define WPAS_TRACE_PFX "wpas <%d>: "

#endif /* CONFIG_DEBUG_LINUX_TRACING */

int wpa_debug_level = MSG_INFO;

int wpa_debug_show_keys = 0;

int wpa_debug_timestamp = 0;

int wpa_debug_syslog = 0;

#ifndef CONFIG_NO_STDOUT_DEBUG

static FILE *out_file = NULL;

#endif /* CONFIG_NO_STDOUT_DEBUG */

#ifdef CONFIG_ANDROID_LOG

#include <android/log.h>

#ifndef ANDROID_LOG_NAME

#define ANDROID_LOG_NAME  "wpa_supplicant"

#endif /* ANDROID_LOG_NAME */

static int wpa_to_android_level(int level)

{

  if (level == MSG_ERROR)

    return ANDROID_LOG_ERROR;

  if (level == MSG_WARNING)

    return ANDROID_LOG_WARN;

  if (level == MSG_INFO)

    return ANDROID_LOG_INFO;

  return ANDROID_LOG_DEBUG;

}

#endif /* CONFIG_ANDROID_LOG */

#ifndef CONFIG_NO_STDOUT_DEBUG

#ifdef CONFIG_DEBUG_FILE

#include <sys/types.h>

#include <sys/stat.h>

#include <fcntl.h>

#endif /* CONFIG_DEBUG_FILE */

void wpa_debug_print_timestamp(void)

{

#ifndef CONFIG_ANDROID_LOG

  struct os_time tv;

  if (!wpa_debug_timestamp)

    return;

  os_get_time(&tv);

#ifdef CONFIG_DEBUG_FILE

  if (out_file)

    fprintf(out_file, "%ld.%06u: ", (long) tv.sec,

      (unsigned int) tv.usec);

#endif /* CONFIG_DEBUG_FILE */

  if (!out_file && !wpa_debug_syslog)

    printf("%ld.%06u: ", (long) tv.sec, (unsigned int) tv.usec);

#endif /* CONFIG_ANDROID_LOG */

}

#ifdef CONFIG_DEBUG_SYSLOG

#ifndef LOG_HOSTAPD

#define LOG_HOSTAPD LOG_DAEMON

#endif /* LOG_HOSTAPD */

void wpa_debug_open_syslog(void)

{

  openlog("wpa_supplicant", LOG_PID | LOG_NDELAY, LOG_HOSTAPD);

  wpa_debug_syslog++;

}

void wpa_debug_close_syslog(void)

{

  if (wpa_debug_syslog)

    closelog();

}

static int syslog_priority(int level)

{

  switch (level) {

  case MSG_MSGDUMP:

  case MSG_DEBUG:

    return LOG_DEBUG;

  case MSG_INFO:

    return LOG_NOTICE;

  case MSG_WARNING:

    return LOG_WARNING;

  case MSG_ERROR:

    return LOG_ERR;

  }

  return LOG_INFO;

}

#endif /* CONFIG_DEBUG_SYSLOG */

#ifdef CONFIG_DEBUG_LINUX_TRACING

int wpa_debug_open_linux_tracing(void)

{

  int mounts, trace_fd;

  char buf[4096] = {};

  ssize_t buflen;

  char *line, *tmp1, *path = NULL;

  mounts = open("/proc/mounts", O_RDONLY);

  if (mounts < 0) {

    printf("no /proc/mounts\n");

    return -1;

  }

  buflen = read(mounts, buf, sizeof(buf) - 1);

  close(mounts);

  if (buflen < 0) {

    printf("failed to read /proc/mounts\n");

    return -1;

  }

  buf[buflen] = '\0';

  line = strtok_r(buf, "\n", &tmp1);

  while (line) {

    char *tmp2, *tmp_path, *fstype;

    /* "<dev> <mountpoint> <fs type> ..." */

    strtok_r(line, " ", &tmp2);

    tmp_path = strtok_r(NULL, " ", &tmp2);

    fstype = strtok_r(NULL, " ", &tmp2);

    if (fstype && strcmp(fstype, "debugfs") == 0) {

      path = tmp_path;

      break;

    }

    line = strtok_r(NULL, "\n", &tmp1);

  }

  if (path == NULL) {

    printf("debugfs mountpoint not found\n");

    return -1;

  }

  snprintf(buf, sizeof(buf) - 1, "%s/tracing/trace_marker", path);

  trace_fd = open(buf, O_WRONLY);

  if (trace_fd < 0) {

    printf("failed to open trace_marker file\n");

    return -1;

  }

  wpa_debug_tracing_file = fdopen(trace_fd, "w");

  if (wpa_debug_tracing_file == NULL) {

    close(trace_fd);

    printf("failed to fdopen()\n");

    return -1;

  }

  return 0;

}

void wpa_debug_close_linux_tracing(void)

{

  if (wpa_debug_tracing_file == NULL)

    return;

  fclose(wpa_debug_tracing_file);

  wpa_debug_tracing_file = NULL;

}

#endif /* CONFIG_DEBUG_LINUX_TRACING */

/**

 * wpa_printf - conditional printf

 * @level: priority level (MSG_*) of the message

 * @fmt: printf format string, followed by optional arguments

 *

 * This function is used to print conditional debugging and error messages. The

 * output may be directed to stdout, stderr, and/or syslog based on

 * configuration.

 *

 * Note: New line '\n' is added to the end of the text when printing to stdout.

 */

void wpa_printf(int level, const char *fmt, ...)

{

  va_list ap;

  if (level >= wpa_debug_level) {

#ifdef CONFIG_ANDROID_LOG

    va_start(ap, fmt);

    __android_log_vprint(wpa_to_android_level(level),

             ANDROID_LOG_NAME, fmt, ap);

    va_end(ap);

#else /* CONFIG_ANDROID_LOG */

#ifdef CONFIG_DEBUG_SYSLOG

    if (wpa_debug_syslog) {

      va_start(ap, fmt);

      vsyslog(syslog_priority(level), fmt, ap);

      va_end(ap);

    }

#endif /* CONFIG_DEBUG_SYSLOG */

    wpa_debug_print_timestamp();

#ifdef CONFIG_DEBUG_FILE

    if (out_file) {

      va_start(ap, fmt);

      vfprintf(out_file, fmt, ap);

      fprintf(out_file, "\n");

      va_end(ap);

    }

#endif /* CONFIG_DEBUG_FILE */

    if (!wpa_debug_syslog && !out_file) {

      va_start(ap, fmt);

      vprintf(fmt, ap);

      printf("\n");

      va_end(ap);

    }

#endif /* CONFIG_ANDROID_LOG */

  }

#ifdef CONFIG_DEBUG_LINUX_TRACING

  if (wpa_debug_tracing_file != NULL) {

    va_start(ap, fmt);

    fprintf(wpa_debug_tracing_file, WPAS_TRACE_PFX, level);

    vfprintf(wpa_debug_tracing_file, fmt, ap);

    fprintf(wpa_debug_tracing_file, "\n");

    fflush(wpa_debug_tracing_file);

    va_end(ap);

  }

#endif /* CONFIG_DEBUG_LINUX_TRACING */

}

static void _wpa_hexdump(int level, const char *title, const u8 *buf,

       size_t len, int show, int only_syslog)

{

  size_t i;

#ifdef CONFIG_DEBUG_LINUX_TRACING

  if (wpa_debug_tracing_file != NULL) {

    fprintf(wpa_debug_tracing_file,

      WPAS_TRACE_PFX "%s - hexdump(len=%lu):",

      level, title, (unsigned long) len);

    if (buf == NULL) {

      fprintf(wpa_debug_tracing_file, " [NULL]\n");

    } else if (!show) {

      fprintf(wpa_debug_tracing_file, " [REMOVED]\n");

    } else {

      for (i = 0; i < len; i++)

        fprintf(wpa_debug_tracing_file,

          " %02x", buf[i]);

    }

    fflush(wpa_debug_tracing_file);

  }

#endif /* CONFIG_DEBUG_LINUX_TRACING */

  if (level < wpa_debug_level)

    return;

#ifdef CONFIG_ANDROID_LOG

  {

    const char *display;

    char *strbuf = NULL;

    size_t slen = len;

    if (buf == NULL) {

      display = " [NULL]";

    } else if (len == 0) {

      display = "";

    } else if (show && len) {

      /* Limit debug message length for Android log */

      if (slen > 32)

        slen = 32;

      strbuf = os_malloc(1 + 3 * slen);

      if (strbuf == NULL) {

        wpa_printf(MSG_ERROR, "wpa_hexdump: Failed to "

             "allocate message buffer");

        return;

      }

      for (i = 0; i < slen; i++)

        os_snprintf(&strbuf[i * 3], 4, " %02x",

              buf[i]);

      display = strbuf;

    } else {

      display = " [REMOVED]";

    }

    __android_log_print(wpa_to_android_level(level),

            ANDROID_LOG_NAME,

            "%s - hexdump(len=%lu):%s%s",

            title, (long unsigned int) len, display,

            len > slen ? " ..." : "");

    bin_clear_free(strbuf, 1 + 3 * slen);

    return;

  }

#else /* CONFIG_ANDROID_LOG */

#ifdef CONFIG_DEBUG_SYSLOG

  if (wpa_debug_syslog) {

    const char *display;

    char *strbuf = NULL;

    if (buf == NULL) {

      display = " [NULL]";

    } else if (len == 0) {

      display = "";

    } else if (show && len) {

      strbuf = os_malloc(1 + 3 * len);

      if (strbuf == NULL) {

        wpa_printf(MSG_ERROR, "wpa_hexdump: Failed to "

             "allocate message buffer");

        return;

      }

      for (i = 0; i < len; i++)

        os_snprintf(&strbuf[i * 3], 4, " %02x",

              buf[i]);

      display = strbuf;

    } else {

      display = " [REMOVED]";

    }

    syslog(syslog_priority(level), "%s - hexdump(len=%lu):%s",

           title, (unsigned long) len, display);

    bin_clear_free(strbuf, 1 + 3 * len);

    if (only_syslog)

      return;

  }

#endif /* CONFIG_DEBUG_SYSLOG */

  wpa_debug_print_timestamp();

#ifdef CONFIG_DEBUG_FILE

  if (out_file) {

    fprintf(out_file, "%s - hexdump(len=%lu):",

      title, (unsigned long) len);

    if (buf == NULL) {

      fprintf(out_file, " [NULL]");

    } else if (show) {

      for (i = 0; i < len; i++)

        fprintf(out_file, " %02x", buf[i]);

    } else {

      fprintf(out_file, " [REMOVED]");

    }

    fprintf(out_file, "\n");

  }

#endif /* CONFIG_DEBUG_FILE */

  if (!wpa_debug_syslog && !out_file) {

    printf("%s - hexdump(len=%lu):", title, (unsigned long) len);

    if (buf == NULL) {

      printf(" [NULL]");

    } else if (show) {

      for (i = 0; i < len; i++)

        printf(" %02x", buf[i]);

    } else {

      printf(" [REMOVED]");

    }

    printf("\n");

  }

#endif /* CONFIG_ANDROID_LOG */

}

void wpa_hexdump(int level, const char *title, const void *buf, size_t len)

{

  _wpa_hexdump(level, title, buf, len, 1, 0);

}

void wpa_hexdump_key(int level, const char *title, const void *buf, size_t len)

{

  _wpa_hexdump(level, title, buf, len, wpa_debug_show_keys, 0);

}

static void _wpa_hexdump_ascii(int level, const char *title, const void *buf,

             size_t len, int show)

{

  size_t i, llen;

  const u8 *pos = buf;

  const size_t line_len = 16;

#ifdef CONFIG_DEBUG_LINUX_TRACING

  if (wpa_debug_tracing_file != NULL) {

    fprintf(wpa_debug_tracing_file,

      WPAS_TRACE_PFX "%s - hexdump_ascii(len=%lu):",

      level, title, (unsigned long) len);

    if (buf == NULL) {

      fprintf(wpa_debug_tracing_file, " [NULL]\n");

    } else if (!show) {

      fprintf(wpa_debug_tracing_file, " [REMOVED]\n");

    } else {

      /* can do ascii processing in userspace */

      for (i = 0; i < len; i++)

        fprintf(wpa_debug_tracing_file,

          " %02x", pos[i]);

    }

    fflush(wpa_debug_tracing_file);

  }

#endif /* CONFIG_DEBUG_LINUX_TRACING */

  if (level < wpa_debug_level)

    return;

#ifdef CONFIG_ANDROID_LOG

  _wpa_hexdump(level, title, buf, len, show, 0);

#else /* CONFIG_ANDROID_LOG */

#ifdef CONFIG_DEBUG_SYSLOG

  if (wpa_debug_syslog)

    _wpa_hexdump(level, title, buf, len, show, 1);

#endif /* CONFIG_DEBUG_SYSLOG */

  wpa_debug_print_timestamp();

#ifdef CONFIG_DEBUG_FILE

  if (out_file) {

    if (!show) {

      fprintf(out_file,

        "%s - hexdump_ascii(len=%lu): [REMOVED]\n",

        title, (unsigned long) len);

      goto file_done;

    }

    if (buf == NULL) {

      fprintf(out_file,

        "%s - hexdump_ascii(len=%lu): [NULL]\n",

        title, (unsigned long) len);

      goto file_done;

    }

    fprintf(out_file, "%s - hexdump_ascii(len=%lu):\n",

      title, (unsigned long) len);

    while (len) {

      llen = len > line_len ? line_len : len;

      fprintf(out_file, "    ");

      for (i = 0; i < llen; i++)

        fprintf(out_file, " %02x", pos[i]);

      for (i = llen; i < line_len; i++)

        fprintf(out_file, "   ");

      fprintf(out_file, "   ");

      for (i = 0; i < llen; i++) {

        if (isprint(pos[i]))

          fprintf(out_file, "%c", pos[i]);

        else

          fprintf(out_file, "_");

      }

      for (i = llen; i < line_len; i++)

        fprintf(out_file, " ");

      fprintf(out_file, "\n");

      pos += llen;

      len -= llen;

    }

  }

file_done:

#endif /* CONFIG_DEBUG_FILE */

  if (!wpa_debug_syslog && !out_file) {

    if (!show) {

      printf("%s - hexdump_ascii(len=%lu): [REMOVED]\n",

             title, (unsigned long) len);

      return;

    }

    if (buf == NULL) {

      printf("%s - hexdump_ascii(len=%lu): [NULL]\n",

             title, (unsigned long) len);

      return;

    }

    printf("%s - hexdump_ascii(len=%lu):\n", title,

           (unsigned long) len);

    while (len) {

      llen = len > line_len ? line_len : len;

      printf("    ");

      for (i = 0; i < llen; i++)

        printf(" %02x", pos[i]);

      for (i = llen; i < line_len; i++)

        printf("   ");

      printf("   ");

      for (i = 0; i < llen; i++) {

        if (isprint(pos[i]))

          printf("%c", pos[i]);

        else

          printf("_");

      }

      for (i = llen; i < line_len; i++)

        printf(" ");

      printf("\n");

      pos += llen;

      len -= llen;

    }

  }

#endif /* CONFIG_ANDROID_LOG */

}

void wpa_hexdump_ascii(int level, const char *title, const void *buf,

           size_t len)

{

  _wpa_hexdump_ascii(level, title, buf, len, 1);

}

void wpa_hexdump_ascii_key(int level, const char *title, const void *buf,

         size_t len)

{

  _wpa_hexdump_ascii(level, title, buf, len, wpa_debug_show_keys);

}

#ifdef CONFIG_DEBUG_FILE

static char *last_path = NULL;

#endif /* CONFIG_DEBUG_FILE */

int wpa_debug_reopen_file(void)

{

#ifdef CONFIG_DEBUG_FILE

  int rv;

  char *tmp;

  if (!last_path)

    return 0; /* logfile not used */

  tmp = os_strdup(last_path);

  if (!tmp)

    return -1;

  wpa_debug_close_file();

  rv = wpa_debug_open_file(tmp);

  os_free(tmp);

  return rv;

#else /* CONFIG_DEBUG_FILE */

  return 0;

#endif /* CONFIG_DEBUG_FILE */

}

int wpa_debug_open_file(const char *path)

{

#ifdef CONFIG_DEBUG_FILE

  int out_fd;

  if (!path)

    return 0;

  if (last_path == NULL || os_strcmp(last_path, path) != 0) {

    /* Save our path to enable re-open */

    os_free(last_path);

    last_path = os_strdup(path);

  }

  out_fd = open(path, O_CREAT | O_APPEND | O_WRONLY,

          S_IRUSR | S_IWUSR | S_IRGRP);

  if (out_fd < 0) {

    wpa_printf(MSG_ERROR,

         "%s: Failed to open output file descriptor, using standard output",

         __func__);

    return -1;

  }

#ifdef __linux__

  if (fcntl(out_fd, F_SETFD, FD_CLOEXEC) < 0) {

    wpa_printf(MSG_DEBUG,

         "%s: Failed to set FD_CLOEXEC - continue without: %s",

         __func__, strerror(errno));

  }

#endif /* __linux__ */

  out_file = fdopen(out_fd, "a");

  if (out_file == NULL) {

    wpa_printf(MSG_ERROR, "wpa_debug_open_file: Failed to open "

         "output file, using standard output");

    close(out_fd);

    return -1;

  }

#ifndef _WIN32

  setvbuf(out_file, NULL, _IOLBF, 0);

#endif /* _WIN32 */

#else /* CONFIG_DEBUG_FILE */

  (void)path;

#endif /* CONFIG_DEBUG_FILE */

  return 0;

}

void wpa_debug_stop_log(void)

{

#ifdef CONFIG_DEBUG_FILE

  if (!out_file)

    return;

  fclose(out_file);

  out_file = NULL;

#endif /* CONFIG_DEBUG_FILE */

}

void wpa_debug_close_file(void)

{

#ifdef CONFIG_DEBUG_FILE

  wpa_debug_stop_log();

  os_free(last_path);

  last_path = NULL;

#endif /* CONFIG_DEBUG_FILE */

}

void wpa_debug_setup_stdout(void)

{

#ifndef _WIN32

  setvbuf(stdout, NULL, _IOLBF, 0);

#endif /* _WIN32 */

}

#endif /* CONFIG_NO_STDOUT_DEBUG */

#ifndef CONFIG_NO_WPA_MSG

static wpa_msg_cb_func wpa_msg_cb = NULL;

void wpa_msg_register_cb(wpa_msg_cb_func func)

{

  wpa_msg_cb = func;

}

static wpa_msg_get_ifname_func wpa_msg_ifname_cb = NULL;

void wpa_msg_register_ifname_cb(wpa_msg_get_ifname_func func)

{

  wpa_msg_ifname_cb = func;

}

void wpa_msg(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  char prefix[130];

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "wpa_msg: Failed to allocate message "

         "buffer");

    return;

  }

  va_start(ap, fmt);

  prefix[0] = '\0';

  if (wpa_msg_ifname_cb) {

    const char *ifname = wpa_msg_ifname_cb(ctx);

    if (ifname) {

      int res = os_snprintf(prefix, sizeof(prefix), "%s: ",

                ifname);

      if (os_snprintf_error(sizeof(prefix), res))

        prefix[0] = '\0';

    }

  }

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_printf(level, "%s%s", prefix, buf);

  if (wpa_msg_cb)

    wpa_msg_cb(ctx, level, WPA_MSG_PER_INTERFACE, buf, len);

  bin_clear_free(buf, buflen);

}

void wpa_msg_ctrl(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  if (!wpa_msg_cb)

    return;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "wpa_msg_ctrl: Failed to allocate "

         "message buffer");

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_msg_cb(ctx, level, WPA_MSG_PER_INTERFACE, buf, len);

  bin_clear_free(buf, buflen);

}

void wpa_msg_global(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "wpa_msg_global: Failed to allocate "

         "message buffer");

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_printf(level, "%s", buf);

  if (wpa_msg_cb)

    wpa_msg_cb(ctx, level, WPA_MSG_GLOBAL, buf, len);

  bin_clear_free(buf, buflen);

}

void wpa_msg_global_ctrl(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  if (!wpa_msg_cb)

    return;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR,

         "wpa_msg_global_ctrl: Failed to allocate message buffer");

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_msg_cb(ctx, level, WPA_MSG_GLOBAL, buf, len);

  bin_clear_free(buf, buflen);

}

void wpa_msg_no_global(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "wpa_msg_no_global: Failed to allocate "

         "message buffer");

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_printf(level, "%s", buf);

  if (wpa_msg_cb)

    wpa_msg_cb(ctx, level, WPA_MSG_NO_GLOBAL, buf, len);

  bin_clear_free(buf, buflen);

}

void wpa_msg_global_only(void *ctx, int level, const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "%s: Failed to allocate message buffer",

         __func__);

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  wpa_printf(level, "%s", buf);

  if (wpa_msg_cb)

    wpa_msg_cb(ctx, level, WPA_MSG_ONLY_GLOBAL, buf, len);

  os_free(buf);

}

#endif /* CONFIG_NO_WPA_MSG */

#ifndef CONFIG_NO_HOSTAPD_LOGGER

static hostapd_logger_cb_func hostapd_logger_cb = NULL;

void hostapd_logger_register_cb(hostapd_logger_cb_func func)

{

  hostapd_logger_cb = func;

}

void hostapd_logger(void *ctx, const u8 *addr, unsigned int module, int level,

        const char *fmt, ...)

{

  va_list ap;

  char *buf;

  int buflen;

  int len;

  va_start(ap, fmt);

  buflen = vsnprintf(NULL, 0, fmt, ap) + 1;

  va_end(ap);

  buf = os_malloc(buflen);

  if (buf == NULL) {

    wpa_printf(MSG_ERROR, "hostapd_logger: Failed to allocate "

         "message buffer");

    return;

  }

  va_start(ap, fmt);

  len = vsnprintf(buf, buflen, fmt, ap);

  va_end(ap);

  if (hostapd_logger_cb)

    hostapd_logger_cb(ctx, addr, module, level, buf, len);

  else if (addr)

    wpa_printf(MSG_DEBUG, "hostapd_logger: STA " MACSTR " - %s",

         MAC2STR(addr), buf);

  else

    wpa_printf(MSG_DEBUG, "hostapd_logger: %s", buf);

  bin_clear_free(buf, buflen);

}

#endif /* CONFIG_NO_HOSTAPD_LOGGER */

const char * debug_level_str(int level)

{

  switch (level) {

  case MSG_EXCESSIVE:

    return "EXCESSIVE";

  case MSG_MSGDUMP:

    return "MSGDUMP";

  case MSG_DEBUG:

    return "DEBUG";

  case MSG_INFO:

    return "INFO";

  case MSG_WARNING:

    return "WARNING";

  case MSG_ERROR:

    return "ERROR";

  default:

    return "?";

  }

}

int str_to_debug_level(const char *s)

{

  if (os_strcasecmp(s, "EXCESSIVE") == 0)

    return MSG_EXCESSIVE;

  if (os_strcasecmp(s, "MSGDUMP") == 0)

    return MSG_MSGDUMP;

  if (os_strcasecmp(s, "DEBUG") == 0)

    return MSG_DEBUG;

  if (os_strcasecmp(s, "INFO") == 0)

    return MSG_INFO;

  if (os_strcasecmp(s, "WARNING") == 0)

    return MSG_WARNING;

  if (os_strcasecmp(s, "ERROR") == 0)

    return MSG_ERROR;

  return -1;

}