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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
18 * along with GNU Zebra; see the file COPYING. If not, write to the Free
19 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 /* Read nbytes from fd and store into ptr. */
29 readn (int fd
, u_char
*ptr
, int nbytes
)
38 nread
= read (fd
, ptr
, nleft
);
50 return nbytes
- nleft
;
53 /* Write nbytes from ptr to fd. */
55 writen(int fd
, const u_char
*ptr
, int nbytes
)
64 nwritten
= write(fd
, ptr
, nleft
);
68 if (!ERRNO_IO_RETRY(errno
))
77 return nbytes
- nleft
;
81 set_nonblocking(int fd
)
85 /* According to the Single UNIX Spec, the return value for F_GETFL should
87 if ((flags
= fcntl(fd
, F_GETFL
)) < 0)
89 zlog_warn("fcntl(F_GETFL) failed for fd %d: %s",
90 fd
, safe_strerror(errno
));
93 if (fcntl(fd
, F_SETFL
, (flags
| O_NONBLOCK
)) < 0)
95 zlog_warn("fcntl failed setting fd %d non-blocking: %s",
96 fd
, safe_strerror(errno
));
106 flags
= fcntl(fd
, F_GETFD
, 0);
111 if (fcntl(fd
, F_SETFD
, flags
) == -1)
122 memcpy (&lu1
, &host
, sizeof (u_int32_t
));
124 memcpy (&convert
, &lu2
, sizeof (u_int32_t
));