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Annotation of embedaddon/dnsmasq/src/outpacket.c, revision 1.1

1.1     ! misho       1: /* dnsmasq is Copyright (c) 2000-2013 Simon Kelley
        !             2: 
        !             3:    This program is free software; you can redistribute it and/or modify
        !             4:    it under the terms of the GNU General Public License as published by
        !             5:    the Free Software Foundation; version 2 dated June, 1991, or
        !             6:    (at your option) version 3 dated 29 June, 2007.
        !             7:  
        !             8:    This program is distributed in the hope that it will be useful,
        !             9:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            10:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            11:    GNU General Public License for more details.
        !            12:      
        !            13:    You should have received a copy of the GNU General Public License
        !            14:    along with this program.  If not, see <http://www.gnu.org/licenses/>.
        !            15: */
        !            16: 
        !            17: 
        !            18: #include "dnsmasq.h"
        !            19:  
        !            20: #ifdef HAVE_DHCP6
        !            21: 
        !            22: static size_t outpacket_counter;
        !            23: 
        !            24: void end_opt6(int container)
        !            25: {
        !            26:    void *p = daemon->outpacket.iov_base + container + 2;
        !            27:    u16 len = outpacket_counter - container - 4 ;
        !            28:    
        !            29:    PUTSHORT(len, p);
        !            30: }
        !            31: 
        !            32: int save_counter(int newval)
        !            33: {
        !            34:   int ret = outpacket_counter;
        !            35:   if (newval != -1)
        !            36:     outpacket_counter = newval;
        !            37: 
        !            38:   return ret;
        !            39: }
        !            40: 
        !            41: void *expand(size_t headroom)
        !            42: {
        !            43:   void *ret;
        !            44: 
        !            45:   if (expand_buf(&daemon->outpacket, outpacket_counter + headroom))
        !            46:     {
        !            47:       ret = daemon->outpacket.iov_base + outpacket_counter;
        !            48:       outpacket_counter += headroom;
        !            49:       return ret;
        !            50:     }
        !            51:   
        !            52:   return NULL;
        !            53: }
        !            54:     
        !            55: int new_opt6(int opt)
        !            56: {
        !            57:   int ret = outpacket_counter;
        !            58:   void *p;
        !            59: 
        !            60:   if ((p = expand(4)))
        !            61:     {
        !            62:       PUTSHORT(opt, p);
        !            63:       PUTSHORT(0, p);
        !            64:     }
        !            65: 
        !            66:   return ret;
        !            67: }
        !            68: 
        !            69: void *put_opt6(void *data, size_t len)
        !            70: {
        !            71:   void *p;
        !            72: 
        !            73:   if ((p = expand(len)))
        !            74:     memcpy(p, data, len);   
        !            75: 
        !            76:   return p;
        !            77: }
        !            78:   
        !            79: void put_opt6_long(unsigned int val)
        !            80: {
        !            81:   void *p;
        !            82:   
        !            83:   if ((p = expand(4)))  
        !            84:     PUTLONG(val, p);
        !            85: }
        !            86: 
        !            87: void put_opt6_short(unsigned int val)
        !            88: {
        !            89:   void *p;
        !            90: 
        !            91:   if ((p = expand(2)))
        !            92:     PUTSHORT(val, p);   
        !            93: }
        !            94: 
        !            95: void put_opt6_char(unsigned int val)
        !            96: {
        !            97:   unsigned char *p;
        !            98: 
        !            99:   if ((p = expand(1)))
        !           100:     *p = val;   
        !           101: }
        !           102: 
        !           103: void put_opt6_string(char *s)
        !           104: {
        !           105:   put_opt6(s, strlen(s));
        !           106: }
        !           107: 
        !           108: #endif