res = tftp_option_get(&buf[2], len - 2, OPTION_BLOCKSIZE);
if (res) {
- int blksize = atoi(res);
+ int blksize = xatoi_u(res);
if (tftp_blocksize_check(blksize, tftp_bufsize - 4)) {
#ifdef CONFIG_FEATURE_TFTP_BLOCKSIZE
if (sblocksize) {
- blocksize = atoi(sblocksize);
+ blocksize = xatoi_u(sblocksize);
if (!tftp_blocksize_check(blocksize, 0)) {
return EXIT_FAILURE;
}