--- /dev/null
+diff --git a/src/http-heads.h b/src/http-heads.h
+new file mode 100644
+index 0000000..9f0927b
+--- /dev/null
++++ b/src/http-heads.h
+@@ -0,0 +1,160 @@
++/* ANSI-C code produced by gperf version 3.0.4 */
++/* Command-line: gperf --global-table -t http-heads.gperf */
++/* Computed positions: -k'3,8' */
++
++#if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
++ && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
++ && (')' == 41) && ('*' == 42) && ('+' == 43) && (',' == 44) \
++ && ('-' == 45) && ('.' == 46) && ('/' == 47) && ('0' == 48) \
++ && ('1' == 49) && ('2' == 50) && ('3' == 51) && ('4' == 52) \
++ && ('5' == 53) && ('6' == 54) && ('7' == 55) && ('8' == 56) \
++ && ('9' == 57) && (':' == 58) && (';' == 59) && ('<' == 60) \
++ && ('=' == 61) && ('>' == 62) && ('?' == 63) && ('A' == 65) \
++ && ('B' == 66) && ('C' == 67) && ('D' == 68) && ('E' == 69) \
++ && ('F' == 70) && ('G' == 71) && ('H' == 72) && ('I' == 73) \
++ && ('J' == 74) && ('K' == 75) && ('L' == 76) && ('M' == 77) \
++ && ('N' == 78) && ('O' == 79) && ('P' == 80) && ('Q' == 81) \
++ && ('R' == 82) && ('S' == 83) && ('T' == 84) && ('U' == 85) \
++ && ('V' == 86) && ('W' == 87) && ('X' == 88) && ('Y' == 89) \
++ && ('Z' == 90) && ('[' == 91) && ('\\' == 92) && (']' == 93) \
++ && ('^' == 94) && ('_' == 95) && ('a' == 97) && ('b' == 98) \
++ && ('c' == 99) && ('d' == 100) && ('e' == 101) && ('f' == 102) \
++ && ('g' == 103) && ('h' == 104) && ('i' == 105) && ('j' == 106) \
++ && ('k' == 107) && ('l' == 108) && ('m' == 109) && ('n' == 110) \
++ && ('o' == 111) && ('p' == 112) && ('q' == 113) && ('r' == 114) \
++ && ('s' == 115) && ('t' == 116) && ('u' == 117) && ('v' == 118) \
++ && ('w' == 119) && ('x' == 120) && ('y' == 121) && ('z' == 122) \
++ && ('{' == 123) && ('|' == 124) && ('}' == 125) && ('~' == 126))
++/* The character set is not based on ISO-646. */
++#error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gnu-gperf@gnu.org>."
++#endif
++
++#line 1 "http-heads.gperf"
++
++#include "vpn.h"
++#line 6 "http-heads.gperf"
++struct http_headers_st { const char *name; unsigned id; };
++
++#define TOTAL_KEYWORDS 12
++#define MIN_WORD_LENGTH 6
++#define MAX_WORD_LENGTH 34
++#define MIN_HASH_VALUE 6
++#define MAX_HASH_VALUE 35
++/* maximum key range = 30, duplicates = 0 */
++
++#ifdef __GNUC__
++__inline
++#else
++#ifdef __cplusplus
++inline
++#endif
++#endif
++static unsigned int
++hash (register const char *str, register unsigned int len)
++{
++ static const unsigned char asso_values[] =
++ {
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 0, 15, 5, 0, 36,
++ 0, 36, 10, 36, 36, 36, 36, 5, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 5, 36, 36, 36, 0, 36, 36, 36, 36,
++ 0, 0, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36, 36, 36, 36, 36,
++ 36, 36, 36, 36, 36, 36
++ };
++ register int hval = len;
++
++ switch (hval)
++ {
++ default:
++ hval += asso_values[(unsigned char)str[7]];
++ /*FALLTHROUGH*/
++ case 7:
++ case 6:
++ case 5:
++ case 4:
++ case 3:
++ hval += asso_values[(unsigned char)str[2]];
++ break;
++ }
++ return hval;
++}
++
++static const struct http_headers_st wordlist[] =
++ {
++ {""}, {""}, {""}, {""}, {""}, {""},
++#line 8 "http-heads.gperf"
++ {"Cookie", HEADER_COOKIE},
++ {""}, {""}, {""},
++#line 12 "http-heads.gperf"
++ {"Connection", HEADER_CONNECTION},
++ {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
++#line 9 "http-heads.gperf"
++ {"User-Agent", HEADER_USER_AGENT},
++ {""},
++#line 11 "http-heads.gperf"
++ {"X-DTLS-Accept-Encoding", HEADER_DTLS_ENCODING},
++#line 14 "http-heads.gperf"
++ {"X-DTLS-CipherSuite", HEADER_DTLS_CIPHERSUITE},
++#line 16 "http-heads.gperf"
++ {"X-CSTP-Address-Type", HEADER_CSTP_ATYPE},
++#line 13 "http-heads.gperf"
++ {"X-DTLS-Master-Secret", HEADER_MASTER_SECRET},
++ {""},
++#line 10 "http-heads.gperf"
++ {"X-CSTP-Accept-Encoding", HEADER_CSTP_ENCODING},
++ {""}, {""},
++#line 17 "http-heads.gperf"
++ {"X-CSTP-Hostname", HEADER_HOSTNAME},
++ {""},
++#line 18 "http-heads.gperf"
++ {"X-CSTP-Full-IPv6-Capability", HEADER_FULL_IPV6},
++ {""},
++#line 19 "http-heads.gperf"
++ {"X-AnyConnect-Identifier-DeviceType", HEADER_DEVICE_TYPE},
++#line 15 "http-heads.gperf"
++ {"X-CSTP-Base-MTU", HEADER_CSTP_BASE_MTU}
++ };
++
++#ifdef __GNUC__
++__inline
++#if defined __GNUC_STDC_INLINE__ || defined __GNUC_GNU_INLINE__
++__attribute__ ((__gnu_inline__))
++#endif
++#endif
++const struct http_headers_st *
++in_word_set (register const char *str, register unsigned int len)
++{
++ if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
++ {
++ register int key = hash (str, len);
++
++ if (key <= MAX_HASH_VALUE && key >= 0)
++ {
++ register const char *s = wordlist[key].name;
++
++ if (*str == *s && !strcmp (str + 1, s + 1))
++ return &wordlist[key];
++ }
++ }
++ return 0;
++}