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author | 2019-07-26 23:20:30 +0200 | |
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committer | 2019-07-29 17:13:35 +0200 | |
commit | 0a1c6b5565e20167d1f1f33a5a8b597f420b18b0 (patch) | |
tree | 98c5da8f231fbd3dc2ce6502040e29c8333d9ffc /ctrl/facemgr/src/util/ip_address.h | |
parent | 05ca0aa8f612ee48fb66d4dbebe596b7f1e03181 (diff) |
[HICN-252] Add per-application policy framework to hicn-light forwarder
Change-Id: I0531cd7a7de179581295ae34766c81cd9cf3e172
Signed-off-by: Jordan Augé <jordan.auge+fdio@cisco.com>
Signed-off-by: Mauro Sardara <msardara@cisco.com>
Co-authored-by: Mauro Sardara <msardara@cisco.com>
Diffstat (limited to 'ctrl/facemgr/src/util/ip_address.h')
-rw-r--r-- | ctrl/facemgr/src/util/ip_address.h | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/ctrl/facemgr/src/util/ip_address.h b/ctrl/facemgr/src/util/ip_address.h new file mode 100644 index 000000000..165394709 --- /dev/null +++ b/ctrl/facemgr/src/util/ip_address.h @@ -0,0 +1,321 @@ +/* + * Copyright (c) 2017-2019 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * \file ip_address.h + * \brief IP address type support + */ +#ifndef UTIL_IP_ADDRESS_H +#define UTIL_IP_ADDRESS_H + +#include <arpa/inet.h> // inet_ntop +#ifdef __APPLE__ +#include <libkern/OSByteOrder.h> +#define __bswap_constant_32(x) OSSwapInt32(x) +#include <machine/endian.h> +#else +#include <endian.h> +#endif +#include <errno.h> +#include <netdb.h> // struct addrinfo +#include <netinet/in.h> // INET*_ADDRSTRLEN, IN*ADDR_LOOPBACK +#include <stdlib.h> +#include <stdio.h> // snprintf +#include <string.h> // memset + +#include "types.h" + +#define bytes_to_bits(x) (x * 8) +#define IPV6_ADDR_LEN 16 /* bytes */ +#define IPV4_ADDR_LEN 4 /* bytes */ +#define IPV6_ADDR_LEN_BITS bytes_to_bits(IPV6_ADDR_LEN) +#define IPV4_ADDR_LEN_BITS bytes_to_bits(IPV4_ADDR_LEN) + +#define IP_MAX_ADDR_LEN IPV6_ADDR_LEN + +#define DUMMY_PORT 1234 + +typedef union { + union { + struct in_addr as_inaddr; + u8 as_u8[4]; + u16 as_u16[2]; + u32 as_u32; + } v4; + union { + struct in6_addr as_in6addr; + u8 as_u8[16]; + u16 as_u16[8]; + u32 as_u32[4]; + u64 as_u64[2]; + } v6; + u8 buffer[IP_MAX_ADDR_LEN]; + u8 as_u8[IP_MAX_ADDR_LEN]; + u16 as_u16[IP_MAX_ADDR_LEN >> 1]; + u32 as_u32[IP_MAX_ADDR_LEN >> 2]; + u64 as_u64[IP_MAX_ADDR_LEN >> 3]; +} ip_address_t; + +#define MAXSZ_IP4_ADDRESS_ INET_ADDRSTRLEN - 1 +#define MAXSZ_IP6_ADDRESS_ INET6_ADDRSTRLEN - 1 +#define MAXSZ_IP_ADDRESS_ MAXSZ_IP6_ADDRESS_ +#define MAXSZ_IP4_ADDRESS MAXSZ_IP4_ADDRESS_ + 1 +#define MAXSZ_IP6_ADDRESS MAXSZ_IP6_ADDRESS_ + 1 +#define MAXSZ_IP_ADDRESS MAXSZ_IP_ADDRESS_ + 1 + +typedef struct { + int family; + ip_address_t address; + u8 len; +} ip_prefix_t; + +#define MAXSZ_PREFIX_ MAXSZ_IP_ADDRESS_ + 1 + 3 +#define MAXSZ_PREFIX MAXSZ_PREFIX_ + 1 + +/* No htonl() with const */ +static const ip_address_t IPV4_LOOPBACK = { +#if __BYTE_ORDER == __LITTLE_ENDIAN + .v4.as_inaddr.s_addr = __bswap_constant_32(INADDR_LOOPBACK), +#else + .v4.as_inaddr.s_addr = INADDR_LOOPBACK, +#endif +}; + +static const ip_address_t IPV6_LOOPBACK = { + .v6.as_in6addr = IN6ADDR_LOOPBACK_INIT, +}; + +static const ip_address_t IPV4_ANY = { + .v4.as_inaddr.s_addr = INADDR_ANY, +}; + +static const ip_address_t IPV6_ANY = { + .v6.as_in6addr = IN6ADDR_ANY_INIT, +}; + +#define IP_ANY(family) (family == AF_INET) ? IPV4_ANY : IPV6_ANY + +static const ip_address_t IP_ADDRESS_EMPTY = { + .as_u64 = { 0 }, +}; + + +#define MAX_PORT 1 << (8 * sizeof(u16)) +#define IS_VALID_PORT(x) ((x > 0) && (x < MAX_PORT)) + +#define MAXSZ_PORT_ 5 +#define MAXSZ_PORT MAXSZ_PORT_ + 1 + +#define IS_VALID_FAMILY(x) ((x == AF_INET) || (x == AF_INET6)) + +static inline +int +ip_address_get_family (const char * ip_address) +{ + struct addrinfo hint, *res = NULL; + int rc; + + memset (&hint, '\0', sizeof hint); + + hint.ai_family = PF_UNSPEC; + hint.ai_flags = AI_NUMERICHOST; + + rc = getaddrinfo (ip_address, NULL, &hint, &res); + if (rc) + { + return -1; + } + rc = res->ai_family; + freeaddrinfo (res); + return rc; +} + +static inline +int +ip_address_len (const ip_address_t * ip_address, int family) +{ + return (family == AF_INET6) ? IPV6_ADDR_LEN : + (family == AF_INET) ? IPV4_ADDR_LEN : 0; +} + +static inline +int +ip_address_ntop (const ip_address_t * ip_address, char *dst, const size_t len, + int family) +{ + const char * s = inet_ntop (family, ip_address->buffer, dst, len); + return (s ? 1 : -1); +} + +/* + * Parse ip addresses in presentation format + */ +static inline +int +ip_address_pton (const char *ip_address_str, ip_address_t * ip_address) +{ + int pton_fd; + char *addr = strdup (ip_address_str); + int family; + + + family = ip_address_get_family (addr); + + switch (family) + { + case AF_INET6: + pton_fd = inet_pton (AF_INET6, addr, &ip_address->buffer); + break; + case AF_INET: + pton_fd = inet_pton (AF_INET, addr, &ip_address->buffer); + break; + default: + goto ERR; + } + + // 0 = not in presentation format + // < 0 = other error (use perror) + if (pton_fd <= 0) + { + goto ERR; + } + + return 1; +ERR: + free (addr); + return -1; +} + + + +static inline +int +ip_address_snprintf(char * s, size_t size, const ip_address_t * ip_address, int family) +{ + size_t len = family == AF_INET ? INET_ADDRSTRLEN : INET6_ADDRSTRLEN; + const char * rc = inet_ntop (family, ip_address->buffer, s, len); + return rc ? strlen(rc) : -1; +} + + +static inline +int +ip_address_to_sockaddr(const ip_address_t * ip_address, + struct sockaddr *sockaddr_address, int family) +{ + struct sockaddr_in6 *tmp6 = (struct sockaddr_in6 *) sockaddr_address; + struct sockaddr_in *tmp4 = (struct sockaddr_in *) sockaddr_address; + + switch (family) + { + case AF_INET6: + tmp6->sin6_family = AF_INET6; + tmp6->sin6_port = DUMMY_PORT; + tmp6->sin6_scope_id = 0; + memcpy (&tmp6->sin6_addr, ip_address->buffer, IPV6_ADDR_LEN); + break; + case AF_INET: + tmp4->sin_family = AF_INET; + tmp4->sin_port = DUMMY_PORT; + memcpy (&tmp4->sin_addr, ip_address->buffer, IPV4_ADDR_LEN); + break; + default: + return -1; + } + + return 1; +} + +static inline +int +ip_address_cmp(const ip_address_t * ip1, const ip_address_t * ip2, int family) +{ + return memcmp(ip1, ip2, ip_address_len(ip1, family)); +} + +static inline +int +ip_address_empty(const ip_address_t * ip) +{ + return (memcmp(ip, &IP_ADDRESS_EMPTY, sizeof(IP_ADDRESS_EMPTY)) == 0); +} + +/* Parse IP Prefixes in presentation format (in bits, separated by a slash) */ +static inline +int +ip_prefix_pton (const char *ip_address_str, ip_prefix_t * ip_prefix) +{ + int pton_fd; + char *p; + char *eptr; + char *addr = strdup (ip_address_str); + + p = strchr (addr, '/'); + if (!p) + { + ip_prefix->len = 0; // until we get the ip address family + } + else + { + ip_prefix->len = strtoul (p + 1, &eptr, 10); + *p = 0; + } + + ip_prefix->family = ip_address_get_family (addr); + + switch (ip_prefix->family) + { + case AF_INET6: + if (ip_prefix->len > IPV6_ADDR_LEN_BITS) + goto ERR; + pton_fd = inet_pton (AF_INET6, addr, &ip_prefix->address.buffer); + break; + case AF_INET: + if (ip_prefix->len > IPV4_ADDR_LEN_BITS) + goto ERR; + pton_fd = inet_pton (AF_INET, addr, &ip_prefix->address.buffer); + break; + default: + goto ERR; + } + + // 0 = not in presentation format + // < 0 = other error (use perror) + if (pton_fd <= 0) + { + goto ERR; + } + + return 1; +ERR: + free (addr); + return -1; +} + +static inline +int +ip_prefix_ntop (const ip_prefix_t * ip_prefix, char *dst, size_t size) +{ + char ip_s[MAXSZ_IP_ADDRESS]; + const char * s = inet_ntop (ip_prefix->family, ip_prefix->address.buffer, ip_s, MAXSZ_IP_ADDRESS); + if (!s) + return -1; + size_t n = snprintf(dst, size, "%s/%d", ip_s, ip_prefix->len); + + return (n > 0 ? 1 : -1); +} + + +#endif /* UTIL_IP_ADDRESS_H */ |