ip_gre.c (123922) | ip_gre.c (123992) |
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1/* $NetBSD: ip_gre.c,v 1.21 2002/08/14 00:23:30 itojun Exp $ */ 2/* $FreeBSD: head/sys/netinet/ip_gre.c 123922 2003-12-28 03:56:00Z sam $ */ | 1/* $NetBSD: ip_gre.c,v 1.29 2003/09/05 23:02:43 itojun Exp $ */ 2/* $FreeBSD: head/sys/netinet/ip_gre.c 123992 2003-12-30 11:41:43Z sobomax $ */ |
3 4/* 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Heiko W.Rupp <hwr@pilhuhn.de> 10 * --- 89 unchanged lines hidden (view full) --- 100 * IPPROTO_GRE and a local destination address). 101 * This really is simple 102 */ 103void 104#if __STDC__ 105gre_input(struct mbuf *m, ...) 106#else 107gre_input(m, va_alist) | 3 4/* 5 * Copyright (c) 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Heiko W.Rupp <hwr@pilhuhn.de> 10 * --- 89 unchanged lines hidden (view full) --- 100 * IPPROTO_GRE and a local destination address). 101 * This really is simple 102 */ 103void 104#if __STDC__ 105gre_input(struct mbuf *m, ...) 106#else 107gre_input(m, va_alist) |
108 struct mbuf *m; 109 va_dcl | 108 struct mbuf *m; 109 va_dcl |
110#endif 111{ 112 int off, ret, proto; 113 va_list ap; 114 115 va_start(ap, m); 116 off = va_arg(ap, int); 117 va_end(ap); --- 12 unchanged lines hidden (view full) --- 130/* 131 * decapsulate. 132 * Does the real work and is called from gre_input() (above) 133 * returns 0 if packet is not yet processed 134 * and 1 if it needs no further processing 135 * proto is the protocol number of the "calling" foo_input() 136 * routine. 137 */ | 110#endif 111{ 112 int off, ret, proto; 113 va_list ap; 114 115 va_start(ap, m); 116 off = va_arg(ap, int); 117 va_end(ap); --- 12 unchanged lines hidden (view full) --- 130/* 131 * decapsulate. 132 * Does the real work and is called from gre_input() (above) 133 * returns 0 if packet is not yet processed 134 * and 1 if it needs no further processing 135 * proto is the protocol number of the "calling" foo_input() 136 * routine. 137 */ |
138 | |
139static int 140gre_input2(struct mbuf *m ,int hlen, u_char proto) 141{ | 138static int 139gre_input2(struct mbuf *m ,int hlen, u_char proto) 140{ |
142 struct greip *gip = mtod(m, struct greip *); | 141 struct greip *gip; |
143 int isr; 144 struct gre_softc *sc; | 142 int isr; 143 struct gre_softc *sc; |
145 u_short flags; | 144 u_int16_t flags; |
146 147 if ((sc = gre_lookup(m, proto)) == NULL) { 148 /* No matching tunnel or tunnel is down. */ 149 return (0); 150 } 151 | 145 146 if ((sc = gre_lookup(m, proto)) == NULL) { 147 /* No matching tunnel or tunnel is down. */ 148 return (0); 149 } 150 |
151 if (m->m_len < sizeof(*gip)) { 152 m = m_pullup(m, sizeof(*gip)); 153 if (m == NULL) 154 return (ENOBUFS); 155 } 156 gip = mtod(m, struct greip *); 157 |
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152 sc->sc_if.if_ipackets++; 153 sc->sc_if.if_ibytes += m->m_pkthdr.len; 154 155 switch (proto) { 156 case IPPROTO_GRE: | 158 sc->sc_if.if_ipackets++; 159 sc->sc_if.if_ibytes += m->m_pkthdr.len; 160 161 switch (proto) { 162 case IPPROTO_GRE: |
157 hlen += sizeof (struct gre_h); | 163 hlen += sizeof(struct gre_h); |
158 159 /* process GRE flags as packet can be of variable len */ 160 flags = ntohs(gip->gi_flags); 161 162 /* Checksum & Offset are present */ 163 if ((flags & GRE_CP) | (flags & GRE_RP)) 164 hlen += 4; 165 /* We don't support routing fields (variable length) */ 166 if (flags & GRE_RP) | 164 165 /* process GRE flags as packet can be of variable len */ 166 flags = ntohs(gip->gi_flags); 167 168 /* Checksum & Offset are present */ 169 if ((flags & GRE_CP) | (flags & GRE_RP)) 170 hlen += 4; 171 /* We don't support routing fields (variable length) */ 172 if (flags & GRE_RP) |
167 return(0); | 173 return (0); |
168 if (flags & GRE_KP) 169 hlen += 4; 170 if (flags & GRE_SP) | 174 if (flags & GRE_KP) 175 hlen += 4; 176 if (flags & GRE_SP) |
171 hlen +=4; | 177 hlen += 4; |
172 173 switch (ntohs(gip->gi_ptype)) { /* ethertypes */ 174 case ETHERTYPE_IP: /* shouldn't need a schednetisr(), as */ 175 case WCCP_PROTOCOL_TYPE: /* we are in ip_input */ 176 isr = NETISR_IP; 177 break; 178#ifdef NETATALK 179 case ETHERTYPE_ATALK: 180 isr = NETISR_ATALK1; 181 break; 182#endif 183 case ETHERTYPE_IPV6: 184 /* FALLTHROUGH */ 185 default: /* others not yet supported */ | 178 179 switch (ntohs(gip->gi_ptype)) { /* ethertypes */ 180 case ETHERTYPE_IP: /* shouldn't need a schednetisr(), as */ 181 case WCCP_PROTOCOL_TYPE: /* we are in ip_input */ 182 isr = NETISR_IP; 183 break; 184#ifdef NETATALK 185 case ETHERTYPE_ATALK: 186 isr = NETISR_ATALK1; 187 break; 188#endif 189 case ETHERTYPE_IPV6: 190 /* FALLTHROUGH */ 191 default: /* others not yet supported */ |
186 return(0); | 192 return (0); |
187 } 188 break; 189 default: 190 /* others not yet supported */ | 193 } 194 break; 195 default: 196 /* others not yet supported */ |
191 return(0); | 197 return (0); |
192 } 193 | 198 } 199 |
194 m->m_data += hlen; 195 m->m_len -= hlen; | 200 if (hlen > m->m_pkthdr.len) { 201 m_freem(m); 202 return (EINVAL); 203 } 204 m_adj(m, hlen); |
196 m->m_pkthdr.len -= hlen; 197 198 if (sc->sc_if.if_bpf) { 199 u_int32_t af = AF_INET; 200 bpf_mtap2(sc->sc_if.if_bpf, &af, sizeof(af), m); 201 } 202 203 m->m_pkthdr.rcvif = &sc->sc_if; 204 205 netisr_dispatch(isr, m); 206 | 205 m->m_pkthdr.len -= hlen; 206 207 if (sc->sc_if.if_bpf) { 208 u_int32_t af = AF_INET; 209 bpf_mtap2(sc->sc_if.if_bpf, &af, sizeof(af), m); 210 } 211 212 m->m_pkthdr.rcvif = &sc->sc_if; 213 214 netisr_dispatch(isr, m); 215 |
207 return(1); /* packet is done, no further processing needed */ | 216 return (1); /* packet is done, no further processing needed */ |
208} 209 210/* 211 * input routine for IPPRPOTO_MOBILE 212 * This is a little bit diffrent from the other modes, as the 213 * encapsulating header was not prepended, but instead inserted 214 * between IP header and payload 215 */ 216 217void 218#if __STDC__ 219gre_mobile_input(struct mbuf *m, ...) 220#else 221gre_mobile_input(m, va_alist) 222 struct mbuf *m; 223 va_dcl 224#endif 225{ | 217} 218 219/* 220 * input routine for IPPRPOTO_MOBILE 221 * This is a little bit diffrent from the other modes, as the 222 * encapsulating header was not prepended, but instead inserted 223 * between IP header and payload 224 */ 225 226void 227#if __STDC__ 228gre_mobile_input(struct mbuf *m, ...) 229#else 230gre_mobile_input(m, va_alist) 231 struct mbuf *m; 232 va_dcl 233#endif 234{ |
226 struct ip *ip = mtod(m, struct ip *); 227 struct mobip_h *mip = mtod(m, struct mobip_h *); | 235 struct ip *ip; 236 struct mobip_h *mip; |
228 struct gre_softc *sc; 229 int hlen; 230 va_list ap; | 237 struct gre_softc *sc; 238 int hlen; 239 va_list ap; |
231 u_char osrc = 0; | |
232 int msiz; 233 | 240 int msiz; 241 |
234 va_start(ap,m); | 242 va_start(ap, m); |
235 hlen = va_arg(ap, int); 236 va_end(ap); 237 238 if ((sc = gre_lookup(m, IPPROTO_MOBILE)) == NULL) { 239 /* No matching tunnel or tunnel is down. */ 240 m_freem(m); 241 return; 242 } 243 | 243 hlen = va_arg(ap, int); 244 va_end(ap); 245 246 if ((sc = gre_lookup(m, IPPROTO_MOBILE)) == NULL) { 247 /* No matching tunnel or tunnel is down. */ 248 m_freem(m); 249 return; 250 } 251 |
252 if (m->m_len < sizeof(*mip)) { 253 m = m_pullup(m, sizeof(*mip)); 254 if (m == NULL) 255 return; 256 } 257 ip = mtod(m, struct ip *); 258 mip = mtod(m, struct mobip_h *); 259 |
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244 sc->sc_if.if_ipackets++; 245 sc->sc_if.if_ibytes += m->m_pkthdr.len; 246 | 260 sc->sc_if.if_ipackets++; 261 sc->sc_if.if_ibytes += m->m_pkthdr.len; 262 |
247 if(ntohs(mip->mh.proto) & MOB_H_SBIT) { 248 osrc = 1; | 263 if (ntohs(mip->mh.proto) & MOB_H_SBIT) { |
249 msiz = MOB_H_SIZ_L; 250 mip->mi.ip_src.s_addr = mip->mh.osrc; | 264 msiz = MOB_H_SIZ_L; 265 mip->mi.ip_src.s_addr = mip->mh.osrc; |
251 } else { | 266 } else |
252 msiz = MOB_H_SIZ_S; | 267 msiz = MOB_H_SIZ_S; |
268 269 if (m->m_len < (ip->ip_hl << 2) + msiz) { 270 m = m_pullup(m, (ip->ip_hl << 2) + msiz); 271 if (m == NULL) 272 return; 273 ip = mtod(m, struct ip *); 274 mip = mtod(m, struct mobip_h *); |
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253 } | 275 } |
276 |
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254 mip->mi.ip_dst.s_addr = mip->mh.odst; 255 mip->mi.ip_p = (ntohs(mip->mh.proto) >> 8); 256 | 277 mip->mi.ip_dst.s_addr = mip->mh.odst; 278 mip->mi.ip_p = (ntohs(mip->mh.proto) >> 8); 279 |
257 if (gre_in_cksum((u_short*)&mip->mh,msiz) != 0) { | 280 if (gre_in_cksum((u_int16_t *)&mip->mh, msiz) != 0) { |
258 m_freem(m); 259 return; 260 } 261 262 bcopy((caddr_t)(ip) + (ip->ip_hl << 2) + msiz, (caddr_t)(ip) + 263 (ip->ip_hl << 2), m->m_len - msiz - (ip->ip_hl << 2)); 264 m->m_len -= msiz; 265 m->m_pkthdr.len -= msiz; --- 45 unchanged lines hidden --- | 281 m_freem(m); 282 return; 283 } 284 285 bcopy((caddr_t)(ip) + (ip->ip_hl << 2) + msiz, (caddr_t)(ip) + 286 (ip->ip_hl << 2), m->m_len - msiz - (ip->ip_hl << 2)); 287 m->m_len -= msiz; 288 m->m_pkthdr.len -= msiz; --- 45 unchanged lines hidden --- |