[BACK]Return to raw_ip.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / sys / netinet

Annotation of src/sys/netinet/raw_ip.c, Revision 1.2

1.1       cgd         1: /*
                      2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
                      3:  * 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:  *     @(#)raw_ip.c    7.8 (Berkeley) 7/25/90
1.2     ! cgd        34:  *
        !            35:  * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
        !            36:  * --------------------         -----   ----------------------
        !            37:  * CURRENT PATCH LEVEL:         1       00020
        !            38:  * --------------------         -----   ----------------------
        !            39:  *
        !            40:  * 03 Nov 92   Julian Elischer         Fixed memory leak that caused ping
        !            41:  *                                     and traceroute to cause panic
1.1       cgd        42:  */
                     43:
                     44: #include "param.h"
                     45: #include "malloc.h"
                     46: #include "mbuf.h"
                     47: #include "socket.h"
                     48: #include "protosw.h"
                     49: #include "socketvar.h"
                     50: #include "errno.h"
                     51:
                     52: #include "../net/if.h"
                     53: #include "../net/route.h"
                     54: #include "../net/raw_cb.h"
                     55:
                     56: #include "in.h"
                     57: #include "in_systm.h"
                     58: #include "ip.h"
                     59: #include "ip_var.h"
                     60: #include "in_pcb.h"
                     61:
                     62: /*
                     63:  * Raw interface to IP protocol.
                     64:  */
                     65:
                     66: struct sockaddr_in ripdst = { sizeof(ripdst), AF_INET };
                     67: struct sockaddr_in ripsrc = { sizeof(ripsrc), AF_INET };
                     68: struct sockproto ripproto = { PF_INET };
                     69: /*
                     70:  * Setup generic address and protocol structures
                     71:  * for raw_input routine, then pass them along with
                     72:  * mbuf chain.
                     73:  */
                     74: rip_input(m)
                     75:        struct mbuf *m;
                     76: {
                     77:        register struct ip *ip = mtod(m, struct ip *);
                     78:
                     79:        ripproto.sp_protocol = ip->ip_p;
                     80:        ripdst.sin_addr = ip->ip_dst;
                     81:        ripsrc.sin_addr = ip->ip_src;
                     82:        if (raw_input(m, &ripproto, (struct sockaddr *)&ripsrc,
                     83:          (struct sockaddr *)&ripdst) == 0) {
                     84:                ipstat.ips_noproto++;
                     85:                ipstat.ips_delivered--;
                     86:        }
                     87: }
                     88:
                     89: /*
                     90:  * Generate IP header and pass packet to ip_output.
                     91:  * Tack on options user may have setup with control call.
                     92:  */
                     93: #define        satosin(sa)     ((struct sockaddr_in *)(sa))
                     94: rip_output(m, so)
                     95:        register struct mbuf *m;
                     96:        struct socket *so;
                     97: {
                     98:        register struct ip *ip;
                     99:        register struct raw_inpcb *rp = sotorawinpcb(so);
                    100:        register struct sockaddr_in *sin;
                    101:
                    102:        /*
                    103:         * If the user handed us a complete IP packet, use it.
                    104:         * Otherwise, allocate an mbuf for a header and fill it in.
                    105:         */
                    106:        if (rp->rinp_flags & RINPF_HDRINCL)
                    107:                ip = mtod(m, struct ip *);
                    108:        else {
                    109:                M_PREPEND(m, sizeof(struct ip), M_WAIT);
                    110:                ip = mtod(m, struct ip *);
                    111:                ip->ip_tos = 0;
                    112:                ip->ip_off = 0;
                    113:                ip->ip_p = rp->rinp_rcb.rcb_proto.sp_protocol;
                    114:                ip->ip_len = m->m_pkthdr.len;
                    115:                if (sin = satosin(rp->rinp_rcb.rcb_laddr)) {
                    116:                        ip->ip_src = sin->sin_addr;
                    117:                } else
                    118:                        ip->ip_src.s_addr = 0;
                    119:                if (sin = satosin(rp->rinp_rcb.rcb_faddr))
                    120:                    ip->ip_dst = sin->sin_addr;
                    121:                ip->ip_ttl = MAXTTL;
                    122:        }
                    123:        return (ip_output(m,
                    124:           (rp->rinp_flags & RINPF_HDRINCL)? (struct mbuf *)0: rp->rinp_options,
                    125:            &rp->rinp_route,
                    126:           (so->so_options & SO_DONTROUTE) | IP_ALLOWBROADCAST));
                    127: }
                    128:
                    129: /*
                    130:  * Raw IP socket option processing.
                    131:  */
                    132: rip_ctloutput(op, so, level, optname, m)
                    133:        int op;
                    134:        struct socket *so;
                    135:        int level, optname;
                    136:        struct mbuf **m;
                    137: {
                    138:        int error = 0;
                    139:        register struct raw_inpcb *rp = sotorawinpcb(so);
                    140:
                    141:        if (level != IPPROTO_IP)
                    142:                error = EINVAL;
                    143:        else switch (op) {
                    144:
                    145:        case PRCO_SETOPT:
                    146:                switch (optname) {
                    147:
                    148:                case IP_OPTIONS:
                    149:                        return (ip_pcbopts(&rp->rinp_options, *m));
                    150:
                    151:                case IP_HDRINCL:
                    152:                        if (m == 0 || *m == 0 || (*m)->m_len < sizeof (int)) {
                    153:                                error = EINVAL;
                    154:                                break;
                    155:                        }
                    156:                        if (*mtod(*m, int *))
                    157:                                rp->rinp_flags |= RINPF_HDRINCL;
                    158:                        else
                    159:                                rp->rinp_flags &= ~RINPF_HDRINCL;
                    160:                        break;
                    161:
                    162:                default:
                    163:                        error = EINVAL;
                    164:                        break;
                    165:                }
                    166:                break;
                    167:
                    168:        case PRCO_GETOPT:
                    169:                *m = m_get(M_WAIT, MT_SOOPTS);
                    170:                switch (optname) {
                    171:
                    172:                case IP_OPTIONS:
                    173:                        if (rp->rinp_options) {
                    174:                                (*m)->m_len = rp->rinp_options->m_len;
                    175:                                bcopy(mtod(rp->rinp_options, caddr_t),
                    176:                                    mtod(*m, caddr_t), (unsigned)(*m)->m_len);
                    177:                        } else
                    178:                                (*m)->m_len = 0;
                    179:                        break;
                    180:
                    181:                case IP_HDRINCL:
                    182:                        (*m)->m_len = sizeof (int);
                    183:                        *mtod(*m, int *) = rp->rinp_flags & RINPF_HDRINCL;
                    184:                        break;
                    185:
                    186:                default:
                    187:                        error = EINVAL;
                    188:                        m_freem(*m);
                    189:                        *m = 0;
                    190:                        break;
                    191:                }
                    192:                break;
                    193:        }
                    194:        if (op == PRCO_SETOPT && *m)
                    195:                (void)m_free(*m);
                    196:        return (error);
                    197: }
                    198:
                    199: /*ARGSUSED*/
1.2     ! cgd       200: rip_usrreq(so, req, m, nam, control)
1.1       cgd       201:        register struct socket *so;
                    202:        int req;
1.2     ! cgd       203:        struct mbuf *m, *nam, *control;
1.1       cgd       204: {
                    205:        register int error = 0;
                    206:        register struct raw_inpcb *rp = sotorawinpcb(so);
                    207:
                    208:        switch (req) {
                    209:
                    210:        case PRU_ATTACH:
                    211:                if (rp)
                    212:                        panic("rip_attach");
                    213:                MALLOC(rp, struct raw_inpcb *, sizeof *rp, M_PCB, M_WAITOK);
                    214:                if (rp == 0)
                    215:                        return (ENOBUFS);
                    216:                bzero((caddr_t)rp, sizeof *rp);
                    217:                so->so_pcb = (caddr_t)rp;
                    218:                break;
                    219:
                    220:        case PRU_DETACH:
                    221:                if (rp == 0)
                    222:                        panic("rip_detach");
                    223:                if (rp->rinp_options)
                    224:                        m_freem(rp->rinp_options);
                    225:                if (rp->rinp_route.ro_rt)
                    226:                        RTFREE(rp->rinp_route.ro_rt);
                    227:                if (rp->rinp_rcb.rcb_laddr)
                    228:                        rp->rinp_rcb.rcb_laddr = 0;
                    229:                break;
                    230:
                    231:        case PRU_BIND:
                    232:            {
                    233:                struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    234:
                    235:                if (nam->m_len != sizeof(*addr))
                    236:                        return (EINVAL);
                    237:                if ((ifnet == 0) ||
                    238:                    ((addr->sin_family != AF_INET) &&
                    239:                     (addr->sin_family != AF_IMPLINK)) ||
                    240:                    (addr->sin_addr.s_addr &&
                    241:                     ifa_ifwithaddr((struct sockaddr *)addr) == 0))
                    242:                        return (EADDRNOTAVAIL);
                    243:                rp->rinp_rcb.rcb_laddr = (struct sockaddr *)&rp->rinp_laddr;
                    244:                rp->rinp_laddr = *addr;
                    245:                return (0);
                    246:            }
                    247:        case PRU_CONNECT:
                    248:            {
                    249:                struct sockaddr_in *addr = mtod(nam, struct sockaddr_in *);
                    250:
                    251:                if (nam->m_len != sizeof(*addr))
                    252:                        return (EINVAL);
                    253:                if (ifnet == 0)
                    254:                        return (EADDRNOTAVAIL);
                    255:                if ((addr->sin_family != AF_INET) &&
                    256:                     (addr->sin_family != AF_IMPLINK))
                    257:                        return (EAFNOSUPPORT);
                    258:                rp->rinp_rcb.rcb_faddr = (struct sockaddr *)&rp->rinp_faddr;
                    259:                rp->rinp_faddr = *addr;
                    260:                soisconnected(so);
                    261:                return (0);
                    262:            }
                    263:        }
                    264:        error =  raw_usrreq(so, req, m, nam, control);
                    265:
                    266:        if (error && (req == PRU_ATTACH) && so->so_pcb)
                    267:                free(so->so_pcb, M_PCB);
                    268:        return (error);
                    269: }

CVSweb <webmaster@jp.NetBSD.org>