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git.proxmox.com Git - mirror_frr.git/blob - lib/network.c
3 * Copyright (C) 1997 Kunihiro Ishiguro
5 * This file is part of GNU Zebra.
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
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.
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
26 /* Read nbytes from fd and store into ptr. */
27 int readn(int fd
, uint8_t *ptr
, int nbytes
)
35 nread
= read(fd
, ptr
, nleft
);
46 return nbytes
- nleft
;
49 /* Write nbytes from ptr to fd. */
50 int writen(int fd
, const uint8_t *ptr
, int nbytes
)
58 nwritten
= write(fd
, ptr
, nleft
);
61 if (!ERRNO_IO_RETRY(errno
))
70 return nbytes
- nleft
;
73 int set_nonblocking(int fd
)
77 /* According to the Single UNIX Spec, the return value for F_GETFL
80 if ((flags
= fcntl(fd
, F_GETFL
)) < 0) {
81 zlog_warn("fcntl(F_GETFL) failed for fd %d: %s", fd
,
82 safe_strerror(errno
));
85 if (fcntl(fd
, F_SETFL
, (flags
| O_NONBLOCK
)) < 0) {
86 zlog_warn("fcntl failed setting fd %d non-blocking: %s", fd
,
87 safe_strerror(errno
));
93 int set_cloexec(int fd
)
96 flags
= fcntl(fd
, F_GETFD
, 0);
101 if (fcntl(fd
, F_SETFD
, flags
) == -1)
106 float htonf(float host
)
111 memcpy(&lu1
, &host
, sizeof(uint32_t));
113 memcpy(&convert
, &lu2
, sizeof(uint32_t));
117 float ntohf(float net
)