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Annotation of qemu/slirp/udp.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986, 1993
                      3:  *     The Regents of the University of California.  All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
                     33:  *     @(#)udp.h       8.1 (Berkeley) 6/10/93
                     34:  * udp.h,v 1.3 1994/08/21 05:27:41 paul Exp
                     35:  */
                     36: 
                     37: #ifndef _UDP_H_
                     38: #define _UDP_H_
                     39: 
                     40: #define UDP_TTL 0x60
                     41: #define UDP_UDPDATALEN 16192
                     42: 
                     43: extern struct socket *udp_last_so;
                     44: 
                     45: /*
                     46:  * Udp protocol header.
                     47:  * Per RFC 768, September, 1981.
                     48:  */
                     49: struct udphdr {
                     50:        u_int16_t       uh_sport;               /* source port */
                     51:        u_int16_t       uh_dport;               /* destination port */
                     52:        int16_t uh_ulen;                /* udp length */
                     53:        u_int16_t       uh_sum;                 /* udp checksum */
                     54: };
                     55: 
                     56: /*
                     57:  * UDP kernel structures and variables.
                     58:  */
                     59: struct udpiphdr {
                     60:                struct  ipovly ui_i;            /* overlaid ip structure */
                     61:                struct  udphdr ui_u;            /* udp header */
                     62: };
                     63: #define ui_next         ui_i.ih_next
                     64: #define ui_prev         ui_i.ih_prev
                     65: #define ui_x1           ui_i.ih_x1
                     66: #define ui_pr           ui_i.ih_pr
                     67: #define ui_len          ui_i.ih_len
                     68: #define ui_src          ui_i.ih_src
                     69: #define ui_dst          ui_i.ih_dst
                     70: #define ui_sport        ui_u.uh_sport
                     71: #define ui_dport        ui_u.uh_dport
                     72: #define ui_ulen         ui_u.uh_ulen
                     73: #define ui_sum          ui_u.uh_sum
                     74: 
                     75: struct udpstat {
                     76:                                        /* input statistics: */
                     77:                u_long  udps_ipackets;          /* total input packets */
                     78:                u_long  udps_hdrops;            /* packet shorter than header */
                     79:                u_long  udps_badsum;            /* checksum error */
                     80:                u_long  udps_badlen;            /* data length larger than packet */
                     81:                u_long  udps_noport;            /* no socket on port */
                     82:                u_long  udps_noportbcast;       /* of above, arrived as broadcast */
                     83:                u_long  udps_fullsock;          /* not delivered, input socket full */
                     84:                u_long  udpps_pcbcachemiss;     /* input packets missing pcb cache */
                     85:                                        /* output statistics: */
                     86:                u_long  udps_opackets;          /* total output packets */
                     87: };
                     88: 
                     89: /*
                     90:  * Names for UDP sysctl objects
                     91:  */
                     92: #define UDPCTL_CHECKSUM         1       /* checksum UDP packets */
                     93: #define UDPCTL_MAXID            2
                     94: 
                     95: extern struct udpstat udpstat;
                     96: extern struct socket udb;
                     97: struct mbuf;
                     98: 
                     99: void udp_init _P((void));
                    100: void udp_input _P((register struct mbuf *, int));
                    101: int udp_output _P((struct socket *, struct mbuf *, struct sockaddr_in *));
                    102: int udp_attach _P((struct socket *));
                    103: void udp_detach _P((struct socket *));
                    104: u_int8_t udp_tos _P((struct socket *));
                    105: void udp_emu _P((struct socket *, struct mbuf *));
                    106: struct socket * udp_listen _P((u_int, u_int32_t, u_int, int));
                    107: int udp_output2(struct socket *so, struct mbuf *m, 
                    108:                 struct sockaddr_in *saddr, struct sockaddr_in *daddr,
                    109:                 int iptos);
                    110: #endif

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