int wpabuf_resize(struct wpabuf **_buf, size_t add_len)
{
struct wpabuf *buf = *_buf;
#ifdef WPA_TRACE
struct wpabuf_trace *trace;
#endif /* WPA_TRACE */
if (buf == NULL) {
*_buf = wpabuf_alloc(add_len);
return *_buf == NULL ? -1 : 0;
}
#ifdef WPA_TRACE
trace = wpabuf_get_trace(buf);
if (trace->magic != WPABUF_MAGIC) {
wpa_printf(MSG_ERROR, "wpabuf: invalid magic %x",
trace->magic);
wpa_trace_show("wpabuf_resize invalid magic");
abort();
}
#endif /* WPA_TRACE */
if (buf->used + add_len > buf->size) {
unsigned char *nbuf;
if (buf->flags & WPABUF_FLAG_EXT_DATA) {
nbuf = os_realloc(buf->buf, buf->used + add_len);
if (nbuf == NULL)
return -1;
os_memset(nbuf + buf->used, 0, add_len);
buf->buf = nbuf;
} else {
#ifdef WPA_TRACE
nbuf = os_realloc(trace, sizeof(struct wpabuf_trace) +
sizeof(struct wpabuf) +
buf->used + add_len);
if (nbuf == NULL)
return -1;
trace = (struct wpabuf_trace *) nbuf;
buf = (struct wpabuf *) (trace + 1);
os_memset(nbuf + sizeof(struct wpabuf_trace) +
sizeof(struct wpabuf) + buf->used, 0,
add_len);
#else /* WPA_TRACE */
nbuf = os_realloc(buf, sizeof(struct wpabuf) +
buf->used + add_len);
if (nbuf == NULL)
return -1;
buf = (struct wpabuf *) nbuf;
os_memset(nbuf + sizeof(struct wpabuf) + buf->used, 0,
add_len);
#endif /* WPA_TRACE */
buf->buf = (u8 *) (buf + 1);
*_buf = buf;
}
buf->size = buf->used + add_len;
}
return 0;
}
static void wpabuf_overflow(const struct wpabuf *buf, size_t len)
{
#ifdef WPA_TRACE
struct wpabuf_trace *trace = wpabuf_get_trace(buf);
if (trace->magic != WPABUF_MAGIC) {
wpa_printf(MSG_ERROR, "wpabuf: invalid magic %x",
trace->magic);
}
#endif /* WPA_TRACE */
wpa_printf(MSG_ERROR, "wpabuf %p (size=%lu used=%lu) overflow len=%lu",
buf, (unsigned long) buf->size, (unsigned long) buf->used,
(unsigned long) len);
wpa_trace_show("wpabuf overflow");
abort();
}
/**
* wpabuf_free - Free a wpabuf
* @buf: wpabuf buffer
*/
void wpabuf_free(struct wpabuf *buf)
{
#ifdef WPA_TRACE
struct wpabuf_trace *trace;
if (buf == NULL)
return;
trace = wpabuf_get_trace(buf);
if (trace->magic != WPABUF_MAGIC) {
wpa_printf(MSG_ERROR, "wpabuf_free: invalid magic %x",
trace->magic);
wpa_trace_show("wpabuf_free magic mismatch");
abort();
}
os_free(buf->ext_data);
os_free(trace);
#else /* WPA_TRACE */
if (buf == NULL)
return;
os_free(buf->ext_data);
os_free(buf);
#endif /* WPA_TRACE */
}
