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Commit | Line | Data |
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718e3744 | 1 | /* |
2 | * Network library. | |
3 | * Copyright (C) 1997 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
896014f4 DL |
17 | * You should have received a copy of the GNU General Public License along |
18 | * with this program; see the file COPYING; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
a269d613 | 23 | #include "log.h" |
24 | #include "network.h" | |
fc41c153 | 25 | #include "lib_errors.h" |
718e3744 | 26 | |
27 | /* Read nbytes from fd and store into ptr. */ | |
d7c0a89a | 28 | int readn(int fd, uint8_t *ptr, int nbytes) |
718e3744 | 29 | { |
d62a17ae | 30 | int nleft; |
31 | int nread; | |
718e3744 | 32 | |
d62a17ae | 33 | nleft = nbytes; |
718e3744 | 34 | |
d62a17ae | 35 | while (nleft > 0) { |
36 | nread = read(fd, ptr, nleft); | |
718e3744 | 37 | |
d62a17ae | 38 | if (nread < 0) |
39 | return (nread); | |
40 | else if (nread == 0) | |
41 | break; | |
718e3744 | 42 | |
d62a17ae | 43 | nleft -= nread; |
44 | ptr += nread; | |
45 | } | |
718e3744 | 46 | |
d62a17ae | 47 | return nbytes - nleft; |
48 | } | |
718e3744 | 49 | |
50 | /* Write nbytes from ptr to fd. */ | |
d7c0a89a | 51 | int writen(int fd, const uint8_t *ptr, int nbytes) |
718e3744 | 52 | { |
d62a17ae | 53 | int nleft; |
54 | int nwritten; | |
718e3744 | 55 | |
d62a17ae | 56 | nleft = nbytes; |
718e3744 | 57 | |
d62a17ae | 58 | while (nleft > 0) { |
59 | nwritten = write(fd, ptr, nleft); | |
5f8fec87 | 60 | |
d62a17ae | 61 | if (nwritten < 0) { |
62 | if (!ERRNO_IO_RETRY(errno)) | |
63 | return nwritten; | |
64 | } | |
65 | if (nwritten == 0) | |
66 | return (nwritten); | |
718e3744 | 67 | |
d62a17ae | 68 | nleft -= nwritten; |
69 | ptr += nwritten; | |
70 | } | |
71 | return nbytes - nleft; | |
718e3744 | 72 | } |
a269d613 | 73 | |
d62a17ae | 74 | int set_nonblocking(int fd) |
a269d613 | 75 | { |
d62a17ae | 76 | int flags; |
77 | ||
78 | /* According to the Single UNIX Spec, the return value for F_GETFL | |
79 | should | |
80 | never be negative. */ | |
81 | if ((flags = fcntl(fd, F_GETFL)) < 0) { | |
450971aa | 82 | flog_err(EC_LIB_SYSTEM_CALL, |
fc41c153 DS |
83 | "fcntl(F_GETFL) failed for fd %d: %s", fd, |
84 | safe_strerror(errno)); | |
d62a17ae | 85 | return -1; |
86 | } | |
87 | if (fcntl(fd, F_SETFL, (flags | O_NONBLOCK)) < 0) { | |
450971aa | 88 | flog_err(EC_LIB_SYSTEM_CALL, |
fc41c153 DS |
89 | "fcntl failed setting fd %d non-blocking: %s", fd, |
90 | safe_strerror(errno)); | |
d62a17ae | 91 | return -1; |
92 | } | |
93 | return 0; | |
a269d613 | 94 | } |
16f1b9ee | 95 | |
d62a17ae | 96 | int set_cloexec(int fd) |
2da59394 | 97 | { |
d62a17ae | 98 | int flags; |
99 | flags = fcntl(fd, F_GETFD, 0); | |
100 | if (flags == -1) | |
101 | return -1; | |
102 | ||
103 | flags |= FD_CLOEXEC; | |
104 | if (fcntl(fd, F_SETFD, flags) == -1) | |
105 | return -1; | |
106 | return 0; | |
2da59394 DL |
107 | } |
108 | ||
d62a17ae | 109 | float htonf(float host) |
16f1b9ee | 110 | { |
d7c0a89a | 111 | uint32_t lu1, lu2; |
d62a17ae | 112 | float convert; |
16f1b9ee | 113 | |
d7c0a89a | 114 | memcpy(&lu1, &host, sizeof(uint32_t)); |
d62a17ae | 115 | lu2 = htonl(lu1); |
d7c0a89a | 116 | memcpy(&convert, &lu2, sizeof(uint32_t)); |
d62a17ae | 117 | return convert; |
16f1b9ee OD |
118 | } |
119 | ||
d62a17ae | 120 | float ntohf(float net) |
16f1b9ee | 121 | { |
d62a17ae | 122 | return htonf(net); |
16f1b9ee | 123 | } |