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1 | | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | | /* |
3 | | * Network library header. |
4 | | * Copyright (C) 1998 Kunihiro Ishiguro |
5 | | */ |
6 | | |
7 | | #ifndef _ZEBRA_NETWORK_H |
8 | | #define _ZEBRA_NETWORK_H |
9 | | |
10 | | #ifdef HAVE_SYS_ENDIAN_H |
11 | | #include <sys/endian.h> |
12 | | #endif |
13 | | #ifdef HAVE_ENDIAN_H |
14 | | #include <endian.h> |
15 | | #endif |
16 | | |
17 | | #ifdef __cplusplus |
18 | | extern "C" { |
19 | | #endif |
20 | | |
21 | | /* Both readn and writen are deprecated and will be removed. They are not |
22 | | suitable for use with non-blocking file descriptors. |
23 | | */ |
24 | | extern int readn(int, uint8_t *, int); |
25 | | extern int writen(int, const uint8_t *, int); |
26 | | |
27 | | /* Set the file descriptor to use non-blocking I/O. Returns 0 for success, |
28 | | -1 on error. */ |
29 | | extern int set_nonblocking(int fd); |
30 | | |
31 | | extern int set_cloexec(int fd); |
32 | | |
33 | | /* Does the I/O error indicate that the operation should be retried later? */ |
34 | | #define ERRNO_IO_RETRY(EN) \ |
35 | 0 | (((EN) == EAGAIN) || ((EN) == EWOULDBLOCK) || ((EN) == EINTR)) |
36 | | |
37 | | extern float htonf(float); |
38 | | extern float ntohf(float); |
39 | | |
40 | | /* force type for be64toh/htobe64 to be uint64_t, *without* a direct cast |
41 | | * |
42 | | * this is a workaround for false-positive printfrr warnings from FRR's |
43 | | * frr-format GCC plugin that would be triggered from |
44 | | * { printfrr("%"PRIu64, (uint64_t)be64toh(...)); } |
45 | | * |
46 | | * the key element here is that "(uint64_t)expr" causes the warning, while |
47 | | * "({ uint64_t x = expr; x; })" does not. (The cast is the trigger, a |
48 | | * variable of the same type works correctly.) |
49 | | */ |
50 | | |
51 | | /* zap system definitions... */ |
52 | | #ifdef be64toh |
53 | | #undef be64toh |
54 | | #endif |
55 | | #ifdef htobe64 |
56 | | #undef htobe64 |
57 | | #endif |
58 | | |
59 | | #if BYTE_ORDER == LITTLE_ENDIAN |
60 | | #define be64toh(x) ({ uint64_t r = __builtin_bswap64(x); r; }) |
61 | | #define htobe64(x) ({ uint64_t r = __builtin_bswap64(x); r; }) |
62 | | #elif BYTE_ORDER == BIG_ENDIAN |
63 | | #define be64toh(x) ({ uint64_t r = (x); r; }) |
64 | | #define htobe64(x) ({ uint64_t r = (x); r; }) |
65 | | #else |
66 | | #error nobody expects the endianish inquisition. check OS endian.h headers. |
67 | | #endif |
68 | | |
69 | | /** |
70 | | * Generate a sequence number using monotonic clock with a same second call |
71 | | * protection to help guarantee a unique incremental sequence number that never |
72 | | * goes back (except when wrapping/overflow). |
73 | | * |
74 | | * **NOTE** this function is not thread safe since it uses `static` variable. |
75 | | * |
76 | | * This function and `frr_sequence32_next` should be used to initialize |
77 | | * sequence numbers without directly calling other `time_t` returning |
78 | | * functions because of `time_t` truncation warnings. |
79 | | * |
80 | | * \returns `uint64_t` number based on the monotonic clock. |
81 | | */ |
82 | | extern uint64_t frr_sequence_next(void); |
83 | | |
84 | | /** Same as `frr_sequence_next` but returns truncated number. */ |
85 | | extern uint32_t frr_sequence32_next(void); |
86 | | |
87 | | /** |
88 | | * Helper function that returns a random long value. The main purpose of |
89 | | * this function is to hide a `random()` call that gets flagged by coverity |
90 | | * scan and put it into one place. |
91 | | * |
92 | | * The main usage of this function should be for generating jitter or weak |
93 | | * random values for simple purposes. |
94 | | * |
95 | | * See 'man 3 random' for more information. |
96 | | * |
97 | | * \returns random long integer. |
98 | | */ |
99 | | static inline long frr_weak_random(void) |
100 | 199 | { |
101 | | /* coverity[dont_call] */ |
102 | 199 | return random(); |
103 | 199 | } Unexecuted instantiation: ospf_interface.c:frr_weak_random ospf_lsa.c:frr_weak_random Line | Count | Source | 100 | 185 | { | 101 | | /* coverity[dont_call] */ | 102 | 185 | return random(); | 103 | 185 | } |
Unexecuted instantiation: ospf_nsm.c:frr_weak_random Unexecuted instantiation: ospf_sr.c:frr_weak_random Unexecuted instantiation: ospf_te.c:frr_weak_random Unexecuted instantiation: ospf_zebra.c:frr_weak_random Unexecuted instantiation: ospf_ext.c:frr_weak_random Unexecuted instantiation: ospf_api.c:frr_weak_random Unexecuted instantiation: buffer.c:frr_weak_random Unexecuted instantiation: command.c:frr_weak_random Unexecuted instantiation: libfrr.c:frr_weak_random Unexecuted instantiation: mgmt_be_client.c:frr_weak_random Unexecuted instantiation: mgmt_fe_client.c:frr_weak_random Unexecuted instantiation: mgmt_msg.c:frr_weak_random Unexecuted instantiation: network.c:frr_weak_random Unexecuted instantiation: pid_output.c:frr_weak_random Line | Count | Source | 100 | 14 | { | 101 | | /* coverity[dont_call] */ | 102 | 14 | return random(); | 103 | 14 | } |
Unexecuted instantiation: skiplist.c:frr_weak_random Unexecuted instantiation: stream.c:frr_weak_random Unexecuted instantiation: event.c:frr_weak_random Unexecuted instantiation: typesafe.c:frr_weak_random Unexecuted instantiation: vty.c:frr_weak_random Unexecuted instantiation: zclient.c:frr_weak_random Unexecuted instantiation: zlog_live.c:frr_weak_random Unexecuted instantiation: label_manager.c:frr_weak_random Unexecuted instantiation: router-id.c:frr_weak_random Unexecuted instantiation: table_manager.c:frr_weak_random Unexecuted instantiation: zapi_msg.c:frr_weak_random Unexecuted instantiation: zebra_gr.c:frr_weak_random Unexecuted instantiation: zebra_srv6.c:frr_weak_random Unexecuted instantiation: zebra_netns_id.c:frr_weak_random Unexecuted instantiation: zebra_ptm.c:frr_weak_random Unexecuted instantiation: zserv.c:frr_weak_random Unexecuted instantiation: bgp_io.c:frr_weak_random Unexecuted instantiation: bgp_network.c:frr_weak_random Unexecuted instantiation: bgp_nexthop.c:frr_weak_random Unexecuted instantiation: bgp_nht.c:frr_weak_random Unexecuted instantiation: bgp_packet.c:frr_weak_random Unexecuted instantiation: bgp_routemap.c:frr_weak_random Unexecuted instantiation: bgp_updgrp.c:frr_weak_random Unexecuted instantiation: bgp_updgrp_packet.c:frr_weak_random Unexecuted instantiation: bgp_zebra.c:frr_weak_random Unexecuted instantiation: bgpd.c:frr_weak_random Unexecuted instantiation: bgp_label.c:frr_weak_random Unexecuted instantiation: pim_iface.c:frr_weak_random Unexecuted instantiation: pim_mroute.c:frr_weak_random Unexecuted instantiation: pim_nht.c:frr_weak_random Unexecuted instantiation: pim_pim.c:frr_weak_random Unexecuted instantiation: pim_rp.c:frr_weak_random Unexecuted instantiation: pim_sock.c:frr_weak_random Unexecuted instantiation: pim_ssmpingd.c:frr_weak_random Unexecuted instantiation: pim_upstream.c:frr_weak_random Unexecuted instantiation: pim_zebra.c:frr_weak_random Unexecuted instantiation: pim_zlookup.c:frr_weak_random Unexecuted instantiation: pim_msdp_packet.c:frr_weak_random Unexecuted instantiation: pim_msdp_socket.c:frr_weak_random |
104 | | |
105 | | #ifdef __cplusplus |
106 | | } |
107 | | #endif |
108 | | |
109 | | #endif /* _ZEBRA_NETWORK_H */ |