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static const struct xt_icmp_names {
const char *name;
uint8_t type;
uint8_t code_min, code_max;
} icmp_codes[] = {
{ "any", 0xFF, 0, 0xFF },
{ "echo-reply", 0, 0, 0xFF },
/* Alias */ { "pong", 0, 0, 0xFF },
{ "destination-unreachable", 3, 0, 0xFF },
{ "network-unreachable", 3, 0, 0 },
{ "host-unreachable", 3, 1, 1 },
{ "protocol-unreachable", 3, 2, 2 },
{ "port-unreachable", 3, 3, 3 },
{ "fragmentation-needed", 3, 4, 4 },
{ "source-route-failed", 3, 5, 5 },
{ "network-unknown", 3, 6, 6 },
{ "host-unknown", 3, 7, 7 },
{ "network-prohibited", 3, 9, 9 },
{ "host-prohibited", 3, 10, 10 },
{ "TOS-network-unreachable", 3, 11, 11 },
{ "TOS-host-unreachable", 3, 12, 12 },
{ "communication-prohibited", 3, 13, 13 },
{ "host-precedence-violation", 3, 14, 14 },
{ "precedence-cutoff", 3, 15, 15 },
{ "source-quench", 4, 0, 0xFF },
{ "redirect", 5, 0, 0xFF },
{ "network-redirect", 5, 0, 0 },
{ "host-redirect", 5, 1, 1 },
{ "TOS-network-redirect", 5, 2, 2 },
{ "TOS-host-redirect", 5, 3, 3 },
{ "echo-request", 8, 0, 0xFF },
/* Alias */ { "ping", 8, 0, 0xFF },
{ "router-advertisement", 9, 0, 0xFF },
{ "router-solicitation", 10, 0, 0xFF },
{ "time-exceeded", 11, 0, 0xFF },
/* Alias */ { "ttl-exceeded", 11, 0, 0xFF },
{ "ttl-zero-during-transit", 11, 0, 0 },
{ "ttl-zero-during-reassembly", 11, 1, 1 },
{ "parameter-problem", 12, 0, 0xFF },
{ "ip-header-bad", 12, 0, 0 },
{ "required-option-missing", 12, 1, 1 },
{ "timestamp-request", 13, 0, 0xFF },
{ "timestamp-reply", 14, 0, 0xFF },
{ "address-mask-request", 17, 0, 0xFF },
{ "address-mask-reply", 18, 0, 0xFF }
}, icmpv6_codes[] = {
{ "destination-unreachable", 1, 0, 0xFF },
{ "no-route", 1, 0, 0 },
{ "communication-prohibited", 1, 1, 1 },
{ "beyond-scope", 1, 2, 2 },
{ "address-unreachable", 1, 3, 3 },
{ "port-unreachable", 1, 4, 4 },
{ "failed-policy", 1, 5, 5 },
{ "reject-route", 1, 6, 6 },
{ "packet-too-big", 2, 0, 0xFF },
{ "time-exceeded", 3, 0, 0xFF },
/* Alias */ { "ttl-exceeded", 3, 0, 0xFF },
{ "ttl-zero-during-transit", 3, 0, 0 },
{ "ttl-zero-during-reassembly", 3, 1, 1 },
{ "parameter-problem", 4, 0, 0xFF },
{ "bad-header", 4, 0, 0 },
{ "unknown-header-type", 4, 1, 1 },
{ "unknown-option", 4, 2, 2 },
{ "echo-request", 128, 0, 0xFF },
/* Alias */ { "ping", 128, 0, 0xFF },
{ "echo-reply", 129, 0, 0xFF },
/* Alias */ { "pong", 129, 0, 0xFF },
{ "router-solicitation", 133, 0, 0xFF },
{ "router-advertisement", 134, 0, 0xFF },
{ "neighbour-solicitation", 135, 0, 0xFF },
/* Alias */ { "neighbor-solicitation", 135, 0, 0xFF },
{ "neighbour-advertisement", 136, 0, 0xFF },
/* Alias */ { "neighbor-advertisement", 136, 0, 0xFF },
{ "redirect", 137, 0, 0xFF },
}, igmp_types[] = {
{ "membership-query", 0x11 },
{ "membership-report-v1", 0x12 },
{ "membership-report-v2", 0x16 },
{ "leave-group", 0x17 },
{ "membership-report-v3", 0x22 },
};
static inline char *parse_range(const char *str, unsigned int res[])
{
char *next;
if (!xtables_strtoui(str, &next, &res[0], 0, 255))
return NULL;
res[1] = res[0];
if (*next == ':') {
str = next + 1;
if (!xtables_strtoui(str, &next, &res[1], 0, 255))
return NULL;
}
return next;
}
static void
__parse_icmp(const struct xt_icmp_names codes[], size_t n_codes,
const char *codes_name, const char *fmtstring,
uint8_t type[], uint8_t code[])
{
unsigned int match = n_codes;
unsigned int i, number[2];
for (i = 0; i < n_codes; i++) {
if (strncasecmp(codes[i].name, fmtstring, strlen(fmtstring)))
continue;
if (match != n_codes)
xtables_error(PARAMETER_PROBLEM,
"Ambiguous %s type `%s': `%s' or `%s'?",
codes_name, fmtstring, codes[match].name,
codes[i].name);
match = i;
}
if (match < n_codes) {
type[0] = type[1] = codes[match].type;
if (code) {
code[0] = codes[match].code_min;
code[1] = codes[match].code_max;
}
} else {
char *next = parse_range(fmtstring, number);
if (!next)
xtables_error(PARAMETER_PROBLEM, "Unknown %s type `%s'",
codes_name, fmtstring);
type[0] = (uint8_t) number[0];
type[1] = (uint8_t) number[1];
switch (*next) {
case 0:
if (code) {
code[0] = 0;
code[1] = 255;
}
return;
case '/':
if (!code)
break;
next = parse_range(next + 1, number);
if (!next)
xtables_error(PARAMETER_PROBLEM,
"Unknown %s code `%s'",
codes_name, fmtstring);
code[0] = (uint8_t) number[0];
code[1] = (uint8_t) number[1];
if (!*next)
break;
/* fallthrough */
default:
xtables_error(PARAMETER_PROBLEM,
"unknown character %c", *next);
}
}
}
static inline void
__ipt_parse_icmp(const struct xt_icmp_names *codes, size_t n_codes,
const char *codes_name, const char *fmtstr,
uint8_t *type, uint8_t code[])
{
uint8_t types[2];
__parse_icmp(codes, n_codes, codes_name, fmtstr, types, code);
if (types[1] != types[0])
xtables_error(PARAMETER_PROBLEM,
"%s type range not supported", codes_name);
*type = types[0];
}
static inline void
ipt_parse_icmp(const char *str, uint8_t *type, uint8_t code[])
{
__ipt_parse_icmp(icmp_codes, ARRAY_SIZE(icmp_codes),
"ICMP", str, type, code);
}
static inline void
ipt_parse_icmpv6(const char *str, uint8_t *type, uint8_t code[])
{
__ipt_parse_icmp(icmpv6_codes, ARRAY_SIZE(icmpv6_codes),
"ICMPv6", str, type, code);
}
static inline void
ebt_parse_icmp(const char *str, uint8_t type[], uint8_t code[])
{
__parse_icmp(icmp_codes, ARRAY_SIZE(icmp_codes),
"ICMP", str, type, code);
}
static inline void
ebt_parse_icmpv6(const char *str, uint8_t type[], uint8_t code[])
{
__parse_icmp(icmpv6_codes, ARRAY_SIZE(icmpv6_codes),
"ICMPv6", str, type, code);
}
static inline void
ebt_parse_igmp(const char *str, uint8_t type[])
{
__parse_icmp(igmp_types, ARRAY_SIZE(igmp_types),
"IGMP", str, type, NULL);
}
static void xt_print_icmp_types(const struct xt_icmp_names *_icmp_codes,
unsigned int n_codes)
{
unsigned int i;
for (i = 0; i < n_codes; ++i) {
if (i && _icmp_codes[i].type == _icmp_codes[i-1].type) {
if (_icmp_codes[i].code_min == _icmp_codes[i-1].code_min
&& (_icmp_codes[i].code_max
== _icmp_codes[i-1].code_max))
printf(" (%s)", _icmp_codes[i].name);
else
printf("\n %s", _icmp_codes[i].name);
}
else
printf("\n%s", _icmp_codes[i].name);
}
printf("\n");
}
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