Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/isatapd-0.9.7/src/tunnel.h
Examining data/isatapd-0.9.7/src/rdisc.c
Examining data/isatapd-0.9.7/src/isatap.h
Examining data/isatapd-0.9.7/src/main.h
Examining data/isatapd-0.9.7/src/rdisc.h
Examining data/isatapd-0.9.7/src/main.c
Examining data/isatapd-0.9.7/src/isatap.c
Examining data/isatapd-0.9.7/src/tunnel.c

FINAL RESULTS:

data/isatapd-0.9.7/src/main.c:118:2:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
	fprintf(stderr, PACKAGE "-" VERSION "\n\n");
data/isatapd-0.9.7/src/isatap.c:363:2:  [3] (random) srand:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
	srand((unsigned int)time(NULL));
data/isatapd-0.9.7/src/main.c:167:7:  [3] (buffer) getopt_long:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
		c = getopt_long(argc, argv, short_options, long_options, &long_index);
data/isatapd-0.9.7/src/isatap.c:468:6:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
					char addrstr[INET6_ADDRSTRLEN];
data/isatapd-0.9.7/src/main.c:217:11:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
				mtu = atoi(optarg);
data/isatapd-0.9.7/src/main.c:228:11:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
				ttl = atoi(optarg);
data/isatapd-0.9.7/src/main.c:479:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char s[32];
data/isatapd-0.9.7/src/main.c:482:7:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
	pf = open(pid_file, O_WRONLY | O_CREAT, 0644);
data/isatapd-0.9.7/src/rdisc.c:120:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char cbuf[CMSG_SPACE (sizeof (int))];
data/isatapd-0.9.7/src/rdisc.c:209:7:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
			  	char str[INET6_ADDRSTRLEN];
data/isatapd-0.9.7/src/rdisc.c:242:5:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
				char str[INET6_ADDRSTRLEN];
data/isatapd-0.9.7/src/rdisc.c:249:5:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
				memcpy (dst.s6_addr, ptr + 8, (optlen - 1) << 3);
data/isatapd-0.9.7/src/rdisc.c:299:2:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
	char str[INET6_ADDRSTRLEN];
data/isatapd-0.9.7/src/main.c:504:19:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
	if (write(pf, s, strlen(s)) < strlen(s))
data/isatapd-0.9.7/src/main.c:504:32:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
	if (write(pf, s, strlen(s)) < strlen(s))
data/isatapd-0.9.7/src/tunnel.c:47:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:85:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(p.name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:92:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120). Risk is low because the source is a
  constant string.
	strncpy(ifr.ifr_name, "sit0", IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:115:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:142:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:176:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(p.name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:178:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:207:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:234:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);
data/isatapd-0.9.7/src/tunnel.c:260:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
	strncpy(ifr.ifr_name, dev, IFNAMSIZ);

ANALYSIS SUMMARY:

Hits = 25
Lines analyzed = 1919 in approximately 0.12 seconds (15748 lines/second)
Physical Source Lines of Code (SLOC) = 1342
Hits@level = [0] 105 [1]  12 [2]  10 [3]   2 [4]   1 [5]   0
Hits@level+ = [0+] 130 [1+]  25 [2+]  13 [3+]   3 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 96.8703 [1+] 18.6289 [2+] 9.68703 [3+] 2.23547 [4+] 0.745156 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.