diff options
Diffstat (limited to '')
| -rw-r--r-- | src/nxt_http_route_addr.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/src/nxt_http_route_addr.c b/src/nxt_http_route_addr.c new file mode 100644 index 00000000..3c7e9c84 --- /dev/null +++ b/src/nxt_http_route_addr.c @@ -0,0 +1,349 @@ + +/* + * Copyright (C) Axel Duch + * Copyright (C) NGINX, Inc. + */ + +#include <nxt_main.h> +#include <nxt_http_route_addr.h> + + +static nxt_bool_t nxt_str_looks_like_ipv6(const nxt_str_t *str); +#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, *end; + 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_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_str_looks_like_ipv6(&addr)) { +#if (NXT_INET6) + 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(nxt_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; + } + + nxt_inet6_addr(&inet6->start, addr.start, addr.length); + + 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(nxt_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 & (0xFFFFFFFF << (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; +} + + +static nxt_bool_t +nxt_str_looks_like_ipv6(const nxt_str_t *str) +{ + u_char *colon, *end; + + colon = nxt_memchr(str->start, ':', str->length); + + if (colon != NULL) { + end = str->start + str->length; + colon = nxt_memchr(colon + 1, ':', end - (colon + 1)); + } + + return (colon != NULL); +} + + +#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 |