| /* dnsmasq is Copyright (c) 2000-2012 Simon Kelley |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; version 2 dated June, 1991, or |
| (at your option) version 3 dated 29 June, 2007. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| |
| #include "dnsmasq.h" |
| |
| #ifdef HAVE_DHCP6 |
| |
| static size_t outpacket_counter; |
| |
| void end_opt6(int container) |
| { |
| void *p = daemon->outpacket.iov_base + container + 2; |
| u16 len = outpacket_counter - container - 4 ; |
| |
| PUTSHORT(len, p); |
| } |
| |
| int save_counter(int newval) |
| { |
| int ret = outpacket_counter; |
| if (newval != -1) |
| outpacket_counter = newval; |
| |
| return ret; |
| } |
| |
| void *expand(size_t headroom) |
| { |
| void *ret; |
| |
| if (expand_buf(&daemon->outpacket, outpacket_counter + headroom)) |
| { |
| ret = daemon->outpacket.iov_base + outpacket_counter; |
| outpacket_counter += headroom; |
| return ret; |
| } |
| |
| return NULL; |
| } |
| |
| int new_opt6(int opt) |
| { |
| int ret = outpacket_counter; |
| void *p; |
| |
| if ((p = expand(4))) |
| { |
| PUTSHORT(opt, p); |
| PUTSHORT(0, p); |
| } |
| |
| return ret; |
| } |
| |
| void *put_opt6(void *data, size_t len) |
| { |
| void *p; |
| |
| if ((p = expand(len))) |
| memcpy(p, data, len); |
| |
| return p; |
| } |
| |
| void put_opt6_long(unsigned int val) |
| { |
| void *p; |
| |
| if ((p = expand(4))) |
| PUTLONG(val, p); |
| } |
| |
| void put_opt6_short(unsigned int val) |
| { |
| void *p; |
| |
| if ((p = expand(2))) |
| PUTSHORT(val, p); |
| } |
| |
| void put_opt6_char(unsigned int val) |
| { |
| unsigned char *p; |
| |
| if ((p = expand(1))) |
| *p = val; |
| } |
| |
| void put_opt6_string(char *s) |
| { |
| put_opt6(s, strlen(s)); |
| } |
| |
| #endif |