diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib/ndpi_main.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c index 9fcab8cf9..13c6ca4ae 100644 --- a/src/lib/ndpi_main.c +++ b/src/lib/ndpi_main.c @@ -6670,21 +6670,29 @@ int ndpi_check_dga_name(struct ndpi_detection_module_struct *ndpi_str, u_int8_t max_num_char_repetitions = 0, last_char = 0, num_char_repetitions = 0, num_dots = 0; u_int8_t max_domain_element_len = 0, curr_domain_element_len = 0, first_element_is_numeric = 1; + if(!name) return(0); + +#ifdef DGA_DEBUG + printf("[DGA] %s\n", name); +#endif + len = strlen(name); if(len >= 5) { int i, j, num_found = 0, num_impossible = 0, num_bigram_checks = 0, num_digits = 0, num_vowels = 0, num_words = 0; char tmp[128], *word, *tok_tmp; - - len = snprintf(tmp, sizeof(tmp)-1, "%s", name); + u_int max_tmp_len = sizeof(tmp)-1; + + len = snprintf(tmp, max_tmp_len, "%s", name); if(len < 0) { #ifdef DGA_DEBUG printf("[DGA] Too short"); #endif return(0); - } + } else + tmp[len < max_tmp_len ? len : max_tmp_len] = '\0'; - for(i=0, j=0; (i<len) && (j<(sizeof(tmp)-1)); i++) { + for(i=0, j=0; (i<len) && (j<max_tmp_len); i++) { tmp[j] = tolower(name[i]); if(tmp[j] == '.') |