projects / thirdparty / lldpd.git / blame
| Commit | Line | Data |
|---|---|---|
| c3e340b6 VB |
1 | /* -*- mode: c; c-file-style: "openbsd" -*- */ |
| 2 | /* | |
| 3 | * Copyright (c) 2013 Vincent Bernat <bernat@luffy.cx> | |
| 4 | * | |
| 5 | * Permission to use, copy, modify, and/or distribute this software for any | |
| 6 | * purpose with or without fee is hereby granted, provided that the above | |
| 7 | * copyright notice and this permission notice appear in all copies. | |
| 8 | * | |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 16 | */ | |
| 17 | ||
| 18 | #include "lldpd.h" | |
| 19 | ||
| 20 | #include <unistd.h> | |
| 21 | ||
| f540397c | 22 | static int |
| 1cf1a23f AQ |
23 | ip_forwarding_enabled(int af) |
| 24 | { | |
| 25 | int fd, rc = -1; | |
| f540397c | 26 | const char *fname; |
| 1cf1a23f AQ |
27 | char status; |
| 28 | ||
| 29 | if (af == LLDPD_AF_IPV4) | |
| 30 | fname = PROCFS_SYS_NET "ipv4/ip_forward"; | |
| 31 | else if (af == LLDPD_AF_IPV6) | |
| 32 | fname = PROCFS_SYS_NET "ipv6/conf/all/forwarding"; | |
| 33 | else | |
| 34 | return -1; | |
| 35 | ||
| 8b549648 | 36 | if ((fd = priv_open(fname)) < 0) return -1; |
| 1cf1a23f | 37 | |
| 8b549648 | 38 | if (read(fd, &status, 1) == 1) rc = (status == '1'); |
| 1cf1a23f AQ |
39 | |
| 40 | close(fd); | |
| 41 | return rc; | |
| 42 | } | |
| 43 | ||
| c3e340b6 | 44 | int |
| 8b549648 VB |
45 | interfaces_routing_enabled(struct lldpd *cfg) |
| 46 | { | |
| c3e340b6 | 47 | (void)cfg; |
| c3e340b6 | 48 | int rc; |
| 1cf1a23f AQ |
49 | |
| 50 | rc = ip_forwarding_enabled(LLDPD_AF_IPV4); | |
| 51 | /* | |
| 52 | * Report being a router if IPv4 forwarding is enabled. | |
| 53 | * In case of error also stop the execution right away. | |
| 54 | * If IPv4 forwarding is disabled we'll check the IPv6 status. | |
| 55 | */ | |
| 8b549648 | 56 | if (rc != 0) return rc; |
| 1cf1a23f AQ |
57 | |
| 58 | return ip_forwarding_enabled(LLDPD_AF_IPV6); | |
| c3e340b6 | 59 | } |