/*
* this function is to avoid logging too much or non-ascii data received.
*/
static char *make_logbuf(belle_sip_log_level level, const char *buffer, size_t size){
char *logbuf;
char truncate_msg[128]={0};
int limit=7000; /*big message when many ice candidates*/
if (!belle_sip_log_level_enabled(level)){
return belle_sip_malloc0(1);
}
limit=find_non_printable(buffer,MIN(size,limit));
if (limit==0){
snprintf(truncate_msg,sizeof(truncate_msg)-1,"... (binary data)");
} else if (size>limit){
snprintf(truncate_msg,sizeof(truncate_msg)-1,"... (first %i bytes shown)",limit);
size=limit;
}
if (truncate_msg[0]!=0){
size+=sizeof(truncate_msg);
}
logbuf=belle_sip_malloc(size+1);
strncpy(logbuf,buffer,limit);
if (truncate_msg[0]!=0){
strncpy(logbuf+limit,truncate_msg,sizeof(truncate_msg));
}
logbuf[size]='\0';
return logbuf;
}
/**
* Clears all non-printable characters, convert them to space.
* Returns NULL if nothing needs to be cleared.
*/
static char *
clear_non_printable(const char *p, size_t length)
{
const char *first = find_non_printable(p, length);
char *dest;
if (first == NULL)
return NULL;
dest = g_strndup(p, length);
for (size_t i = first - p; i < length; ++i)
if (char_is_non_printable(dest[i]))
dest[i] = ' ';
return dest;
}