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Annotation of qemu/slirp/udp.h, revision 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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