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|
/*
* Copyright (C) Axel Duch
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_http_route_addr.h>
#if (NXT_INET6)
static nxt_bool_t nxt_valid_ipv6_blocks(u_char *c, size_t len);
#endif
nxt_int_t
nxt_http_route_addr_pattern_parse(nxt_mp_t *mp,
nxt_http_route_addr_pattern_t *pattern, nxt_conf_value_t *cv)
{
u_char *delim;
nxt_int_t ret, cidr_prefix;
nxt_str_t addr, port;
nxt_http_route_addr_base_t *base;
nxt_http_route_addr_range_t *inet;
if (nxt_conf_type(cv) != NXT_CONF_STRING) {
return NXT_ADDR_PATTERN_CV_TYPE_ERROR;
}
nxt_conf_get_string(cv, &addr);
base = &pattern->base;
if (addr.length > 0 && addr.start[0] == '!') {
addr.start++;
addr.length--;
base->negative = 1;
} else {
base->negative = 0;
}
if (nxt_str_eq(&addr, "unix", 4)) {
#if (NXT_HAVE_UNIX_DOMAIN)
base->addr_family = AF_UNIX;
return NXT_OK;
#else
return NXT_ADDR_PATTERN_NO_UNIX_ERROR;
#endif
}
if (nxt_slow_path(addr.length < 2)) {
return NXT_ADDR_PATTERN_LENGTH_ERROR;
}
nxt_str_null(&port);
if (addr.start[0] == '*' && addr.start[1] == ':') {
port.start = addr.start + 2;
port.length = addr.length - 2;
base->addr_family = AF_UNSPEC;
base->match_type = NXT_HTTP_ROUTE_ADDR_ANY;
goto parse_port;
}
if (nxt_inet6_probe(&addr)) {
#if (NXT_INET6)
u_char *end;
uint8_t i;
nxt_int_t len;
nxt_http_route_in6_addr_range_t *inet6;
base->addr_family = AF_INET6;
if (addr.start[0] == '[') {
addr.start++;
addr.length--;
end = addr.start + addr.length;
port.start = nxt_rmemstrn(addr.start, end, "]:", 2);
if (nxt_slow_path(port.start == NULL)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
addr.length = port.start - addr.start;
port.start += nxt_length("]:");
port.length = end - port.start;
}
inet6 = &pattern->addr.v6;
delim = nxt_memchr(addr.start, '-', addr.length);
if (delim != NULL) {
len = delim - addr.start;
if (nxt_slow_path(!nxt_valid_ipv6_blocks(addr.start, len))) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
ret = nxt_inet6_addr(&inet6->start, addr.start, len);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
len = addr.start + addr.length - delim - 1;
if (nxt_slow_path(!nxt_valid_ipv6_blocks(delim + 1, len))) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
ret = nxt_inet6_addr(&inet6->end, delim + 1, len);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
if (nxt_slow_path(memcmp(&inet6->start, &inet6->end,
sizeof(struct in6_addr)) > 0))
{
return NXT_ADDR_PATTERN_RANGE_OVERLAP_ERROR;
}
base->match_type = NXT_HTTP_ROUTE_ADDR_RANGE;
goto parse_port;
}
delim = nxt_memchr(addr.start, '/', addr.length);
if (delim != NULL) {
cidr_prefix = nxt_int_parse(delim + 1,
addr.start + addr.length - (delim + 1));
if (nxt_slow_path(cidr_prefix < 0 || cidr_prefix > 128)) {
return NXT_ADDR_PATTERN_CIDR_ERROR;
}
addr.length = delim - addr.start;
if (nxt_slow_path(!nxt_valid_ipv6_blocks(addr.start,
addr.length)))
{
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
ret = nxt_inet6_addr(&inet6->start, addr.start, addr.length);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
if (nxt_slow_path(cidr_prefix == 0)) {
base->match_type = NXT_HTTP_ROUTE_ADDR_ANY;
goto parse_port;
}
if (nxt_slow_path(cidr_prefix == 128)) {
base->match_type = NXT_HTTP_ROUTE_ADDR_EXACT;
goto parse_port;
}
base->match_type = NXT_HTTP_ROUTE_ADDR_CIDR;
for (i = 0; i < sizeof(struct in6_addr); i++) {
if (cidr_prefix >= 8) {
inet6->end.s6_addr[i] = 0xFF;
cidr_prefix -= 8;
continue;
}
if (cidr_prefix > 0) {
inet6->end.s6_addr[i] = 0xFF & (0xFF << (8 - cidr_prefix));
inet6->start.s6_addr[i] &= inet6->end.s6_addr[i];
cidr_prefix = 0;
continue;
}
inet6->start.s6_addr[i] = 0;
inet6->end.s6_addr[i] = 0;
}
goto parse_port;
}
base->match_type = NXT_HTTP_ROUTE_ADDR_EXACT;
if (nxt_slow_path(!nxt_valid_ipv6_blocks(addr.start, addr.length))) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
ret = nxt_inet6_addr(&inet6->start, addr.start, addr.length);
if (nxt_slow_path(ret != NXT_OK)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
goto parse_port;
#endif
return NXT_ADDR_PATTERN_NO_IPv6_ERROR;
}
base->addr_family = AF_INET;
delim = nxt_memchr(addr.start, ':', addr.length);
if (delim != NULL) {
port.start = delim + 1;
port.length = addr.start + addr.length - port.start;
addr.length = delim - addr.start;
}
inet = &pattern->addr.v4;
delim = nxt_memchr(addr.start, '-', addr.length);
if (delim != NULL) {
inet->start = nxt_inet_addr(addr.start, delim - addr.start);
if (nxt_slow_path(inet->start == INADDR_NONE)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
inet->end = nxt_inet_addr(delim + 1,
addr.start + addr.length - (delim + 1));
if (nxt_slow_path(inet->end == INADDR_NONE)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
if (nxt_slow_path(memcmp(&inet->start, &inet->end,
sizeof(struct in_addr)) > 0))
{
return NXT_ADDR_PATTERN_RANGE_OVERLAP_ERROR;
}
base->match_type = NXT_HTTP_ROUTE_ADDR_RANGE;
goto parse_port;
}
delim = nxt_memchr(addr.start, '/', addr.length);
if (delim != NULL) {
cidr_prefix = nxt_int_parse(delim + 1,
addr.start + addr.length - (delim + 1));
if (nxt_slow_path(cidr_prefix < 0 || cidr_prefix > 32)) {
return NXT_ADDR_PATTERN_CIDR_ERROR;
}
addr.length = delim - addr.start;
inet->end = htonl(0xFFFFFFFF & (0xFFFFFFFFULL << (32 - cidr_prefix)));
inet->start = nxt_inet_addr(addr.start, addr.length) & inet->end;
if (nxt_slow_path(inet->start == INADDR_NONE)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
if (cidr_prefix == 0) {
base->match_type = NXT_HTTP_ROUTE_ADDR_ANY;
goto parse_port;
}
if (cidr_prefix < 32) {
base->match_type = NXT_HTTP_ROUTE_ADDR_CIDR;
goto parse_port;
}
}
inet->start = nxt_inet_addr(addr.start, addr.length);
if (nxt_slow_path(inet->start == INADDR_NONE)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
base->match_type = NXT_HTTP_ROUTE_ADDR_EXACT;
parse_port:
if (port.length == 0) {
if (nxt_slow_path(port.start != NULL)) {
return NXT_ADDR_PATTERN_FORMAT_ERROR;
}
base->port.start = 0;
base->port.end = 65535;
return NXT_OK;
}
delim = nxt_memchr(port.start, '-', port.length - 1);
if (delim != NULL) {
ret = nxt_int_parse(port.start, delim - port.start);
if (nxt_slow_path(ret < 0 || ret > 65535)) {
return NXT_ADDR_PATTERN_PORT_ERROR;
}
base->port.start = ret;
ret = nxt_int_parse(delim + 1, port.start + port.length - (delim + 1));
if (nxt_slow_path(ret < base->port.start || ret > 65535)) {
return NXT_ADDR_PATTERN_PORT_ERROR;
}
base->port.end = ret;
} else {
ret = nxt_int_parse(port.start, port.length);
if (nxt_slow_path(ret < 0 || ret > 65535)) {
return NXT_ADDR_PATTERN_PORT_ERROR;
}
base->port.start = ret;
base->port.end = ret;
}
return NXT_OK;
}
#if (NXT_INET6)
static nxt_bool_t
nxt_valid_ipv6_blocks(u_char *c, size_t len)
{
u_char *end;
nxt_uint_t colon_gap;
end = c + len;
colon_gap = 0;
while (c != end) {
if (*c == ':') {
colon_gap = 0;
c++;
continue;
}
colon_gap++;
c++;
if (nxt_slow_path(colon_gap > 4)) {
return 0;
}
}
return 1;
}
#endif
|
