| Willy Tarreau | 0d06df6 | 2020-08-28 15:10:11 +0200 | [diff] [blame] | 1 | /* |
| 2 | * AF_INET/AF_INET6 socket management |
| 3 | * |
| 4 | * Copyright 2000-2020 Willy Tarreau <w@1wt.eu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version |
| 9 | * 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #include <string.h> |
| 14 | |
| 15 | #include <sys/param.h> |
| 16 | #include <sys/socket.h> |
| 17 | #include <sys/types.h> |
| 18 | |
| 19 | #include <netinet/tcp.h> |
| 20 | #include <netinet/in.h> |
| 21 | |
| 22 | #include <haproxy/api.h> |
| 23 | #include <haproxy/sock_inet.h> |
| 24 | #include <haproxy/tools.h> |
| 25 | |
| 26 | |
| 27 | /* PLEASE NOTE for function below: |
| 28 | * - sock_inet4_* is solely for AF_INET (IPv4) |
| 29 | * - sock_inet6_* is solely for AF_INET6 (IPv6) |
| 30 | * - sock_inet_* is for either |
| 31 | * |
| 32 | * The address family SHOULD always be checked. In some cases a function will |
| 33 | * be used in a situation where the address family is guaranteed (e.g. protocol |
| 34 | * definitions), so the test may be avoided. This special case must then be |
| 35 | * mentioned in the comment before the function definition. |
| 36 | */ |
| 37 | |
| 38 | |
| 39 | /* Compares two AF_INET sockaddr addresses. Returns 0 if they match or non-zero |
| 40 | * if they do not match. |
| 41 | */ |
| 42 | int sock_inet4_addrcmp(const struct sockaddr_storage *a, const struct sockaddr_storage *b) |
| 43 | { |
| 44 | const struct sockaddr_in *a4 = (const struct sockaddr_in *)a; |
| 45 | const struct sockaddr_in *b4 = (const struct sockaddr_in *)b; |
| 46 | |
| 47 | if (a->ss_family != b->ss_family) |
| 48 | return -1; |
| 49 | |
| 50 | if (a->ss_family != AF_INET) |
| 51 | return -1; |
| 52 | |
| 53 | if (a4->sin_port != b4->sin_port) |
| 54 | return -1; |
| 55 | |
| 56 | return memcmp(&a4->sin_addr, &b4->sin_addr, sizeof(a4->sin_addr)); |
| 57 | } |
| 58 | |
| 59 | /* Compares two AF_INET6 sockaddr addresses. Returns 0 if they match or |
| 60 | * non-zero if they do not match. |
| 61 | */ |
| 62 | int sock_inet6_addrcmp(const struct sockaddr_storage *a, const struct sockaddr_storage *b) |
| 63 | { |
| 64 | const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *)a; |
| 65 | const struct sockaddr_in6 *b6 = (const struct sockaddr_in6 *)b; |
| 66 | |
| 67 | if (a->ss_family != b->ss_family) |
| 68 | return -1; |
| 69 | |
| 70 | if (a->ss_family != AF_INET6) |
| 71 | return -1; |
| 72 | |
| 73 | if (a6->sin6_port != b6->sin6_port) |
| 74 | return -1; |
| 75 | |
| 76 | return memcmp(&a6->sin6_addr, &b6->sin6_addr, sizeof(a6->sin6_addr)); |
| 77 | } |