Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 |
| 3 | * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. |
| 4 | */ |
| 5 | |
| 6 | #include "qemu/osdep.h" |
| 7 | #include "slirp.h" |
| 8 | #include "ip6_icmp.h" |
| 9 | #include "qemu/timer.h" |
| 10 | #include "qemu/error-report.h" |
| 11 | #include "qemu/log.h" |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 12 | |
| 13 | #define NDP_Interval g_rand_int_range(slirp->grand, \ |
| 14 | NDP_MinRtrAdvInterval, NDP_MaxRtrAdvInterval) |
| 15 | |
| 16 | static void ra_timer_handler(void *opaque) |
| 17 | { |
| 18 | Slirp *slirp = opaque; |
| 19 | timer_mod(slirp->ra_timer, |
| 20 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval); |
| 21 | ndp_send_ra(slirp); |
| 22 | } |
| 23 | |
| 24 | void icmp6_init(Slirp *slirp) |
| 25 | { |
Samuel Thibault | 0b11c03 | 2016-03-20 12:29:54 +0100 | [diff] [blame] | 26 | if (!slirp->in6_enabled) { |
| 27 | return; |
| 28 | } |
| 29 | |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 30 | slirp->ra_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, ra_timer_handler, slirp); |
| 31 | timer_mod(slirp->ra_timer, |
| 32 | qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval); |
| 33 | } |
| 34 | |
| 35 | void icmp6_cleanup(Slirp *slirp) |
| 36 | { |
Samuel Thibault | 0b11c03 | 2016-03-20 12:29:54 +0100 | [diff] [blame] | 37 | if (!slirp->in6_enabled) { |
| 38 | return; |
| 39 | } |
| 40 | |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 41 | timer_del(slirp->ra_timer); |
| 42 | timer_free(slirp->ra_timer); |
| 43 | } |
| 44 | |
| 45 | static void icmp6_send_echoreply(struct mbuf *m, Slirp *slirp, struct ip6 *ip, |
| 46 | struct icmp6 *icmp) |
| 47 | { |
| 48 | struct mbuf *t = m_get(slirp); |
| 49 | t->m_len = sizeof(struct ip6) + ntohs(ip->ip_pl); |
| 50 | memcpy(t->m_data, m->m_data, t->m_len); |
| 51 | |
| 52 | /* IPv6 Packet */ |
| 53 | struct ip6 *rip = mtod(t, struct ip6 *); |
| 54 | rip->ip_dst = ip->ip_src; |
| 55 | rip->ip_src = ip->ip_dst; |
| 56 | |
| 57 | /* ICMPv6 packet */ |
| 58 | t->m_data += sizeof(struct ip6); |
| 59 | struct icmp6 *ricmp = mtod(t, struct icmp6 *); |
| 60 | ricmp->icmp6_type = ICMP6_ECHO_REPLY; |
| 61 | ricmp->icmp6_cksum = 0; |
| 62 | |
| 63 | /* Checksum */ |
| 64 | t->m_data -= sizeof(struct ip6); |
| 65 | ricmp->icmp6_cksum = ip6_cksum(t); |
| 66 | |
| 67 | ip6_output(NULL, t, 0); |
| 68 | } |
| 69 | |
Yann Bordenave | fc6c925 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 70 | void icmp6_send_error(struct mbuf *m, uint8_t type, uint8_t code) |
| 71 | { |
| 72 | Slirp *slirp = m->slirp; |
| 73 | struct mbuf *t; |
| 74 | struct ip6 *ip = mtod(m, struct ip6 *); |
| 75 | |
| 76 | DEBUG_CALL("icmp6_send_error"); |
| 77 | DEBUG_ARGS((dfd, " type = %d, code = %d\n", type, code)); |
| 78 | |
| 79 | if (IN6_IS_ADDR_MULTICAST(&ip->ip_src) || |
Philippe Mathieu-Daudé | 1120fae | 2018-01-08 14:28:55 -0300 | [diff] [blame] | 80 | in6_zero(&ip->ip_src)) { |
Yann Bordenave | fc6c925 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 81 | /* TODO icmp error? */ |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | t = m_get(slirp); |
| 86 | |
| 87 | /* IPv6 packet */ |
| 88 | struct ip6 *rip = mtod(t, struct ip6 *); |
| 89 | rip->ip_src = (struct in6_addr)LINKLOCAL_ADDR; |
| 90 | rip->ip_dst = ip->ip_src; |
| 91 | #if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) |
| 92 | char addrstr[INET6_ADDRSTRLEN]; |
| 93 | inet_ntop(AF_INET6, &rip->ip_dst, addrstr, INET6_ADDRSTRLEN); |
| 94 | DEBUG_ARG("target = %s", addrstr); |
| 95 | #endif |
| 96 | |
| 97 | rip->ip_nh = IPPROTO_ICMPV6; |
Yuval Shaia | 893dcdb | 2016-11-29 17:07:34 +0200 | [diff] [blame] | 98 | const int error_data_len = MIN(m->m_len, |
Yann Bordenave | fc6c925 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 99 | IF_MTU - (sizeof(struct ip6) + ICMP6_ERROR_MINLEN)); |
| 100 | rip->ip_pl = htons(ICMP6_ERROR_MINLEN + error_data_len); |
| 101 | t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); |
| 102 | |
| 103 | /* ICMPv6 packet */ |
| 104 | t->m_data += sizeof(struct ip6); |
| 105 | struct icmp6 *ricmp = mtod(t, struct icmp6 *); |
| 106 | ricmp->icmp6_type = type; |
| 107 | ricmp->icmp6_code = code; |
| 108 | ricmp->icmp6_cksum = 0; |
| 109 | |
| 110 | switch (type) { |
| 111 | case ICMP6_UNREACH: |
| 112 | case ICMP6_TIMXCEED: |
| 113 | ricmp->icmp6_err.unused = 0; |
| 114 | break; |
| 115 | case ICMP6_TOOBIG: |
| 116 | ricmp->icmp6_err.mtu = htonl(IF_MTU); |
| 117 | break; |
| 118 | case ICMP6_PARAMPROB: |
| 119 | /* TODO: Handle this case */ |
| 120 | break; |
| 121 | default: |
| 122 | g_assert_not_reached(); |
| 123 | break; |
| 124 | } |
| 125 | t->m_data += ICMP6_ERROR_MINLEN; |
| 126 | memcpy(t->m_data, m->m_data, error_data_len); |
| 127 | |
| 128 | /* Checksum */ |
| 129 | t->m_data -= ICMP6_ERROR_MINLEN; |
| 130 | t->m_data -= sizeof(struct ip6); |
| 131 | ricmp->icmp6_cksum = ip6_cksum(t); |
| 132 | |
| 133 | ip6_output(NULL, t, 0); |
| 134 | } |
| 135 | |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 136 | /* |
| 137 | * Send NDP Router Advertisement |
| 138 | */ |
| 139 | void ndp_send_ra(Slirp *slirp) |
| 140 | { |
| 141 | DEBUG_CALL("ndp_send_ra"); |
| 142 | |
| 143 | /* Build IPv6 packet */ |
| 144 | struct mbuf *t = m_get(slirp); |
| 145 | struct ip6 *rip = mtod(t, struct ip6 *); |
Samuel Thibault | e42f869 | 2017-03-26 20:28:11 +0200 | [diff] [blame] | 146 | size_t pl_size = 0; |
Samuel Thibault | a2f80fd | 2017-03-26 20:46:34 +0200 | [diff] [blame] | 147 | struct in6_addr addr; |
| 148 | uint32_t scope_id; |
| 149 | |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 150 | rip->ip_src = (struct in6_addr)LINKLOCAL_ADDR; |
| 151 | rip->ip_dst = (struct in6_addr)ALLNODES_MULTICAST; |
| 152 | rip->ip_nh = IPPROTO_ICMPV6; |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 153 | |
| 154 | /* Build ICMPv6 packet */ |
| 155 | t->m_data += sizeof(struct ip6); |
| 156 | struct icmp6 *ricmp = mtod(t, struct icmp6 *); |
| 157 | ricmp->icmp6_type = ICMP6_NDP_RA; |
| 158 | ricmp->icmp6_code = 0; |
| 159 | ricmp->icmp6_cksum = 0; |
| 160 | |
| 161 | /* NDP */ |
| 162 | ricmp->icmp6_nra.chl = NDP_AdvCurHopLimit; |
| 163 | ricmp->icmp6_nra.M = NDP_AdvManagedFlag; |
| 164 | ricmp->icmp6_nra.O = NDP_AdvOtherConfigFlag; |
| 165 | ricmp->icmp6_nra.reserved = 0; |
| 166 | ricmp->icmp6_nra.lifetime = htons(NDP_AdvDefaultLifetime); |
| 167 | ricmp->icmp6_nra.reach_time = htonl(NDP_AdvReachableTime); |
| 168 | ricmp->icmp6_nra.retrans_time = htonl(NDP_AdvRetransTime); |
Samuel Thibault | f7725df | 2016-03-20 16:02:52 +0100 | [diff] [blame] | 169 | t->m_data += ICMP6_NDP_RA_MINLEN; |
Samuel Thibault | e42f869 | 2017-03-26 20:28:11 +0200 | [diff] [blame] | 170 | pl_size += ICMP6_NDP_RA_MINLEN; |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 171 | |
| 172 | /* Source link-layer address (NDP option) */ |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 173 | struct ndpopt *opt = mtod(t, struct ndpopt *); |
| 174 | opt->ndpopt_type = NDPOPT_LINKLAYER_SOURCE; |
| 175 | opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; |
| 176 | in6_compute_ethaddr(rip->ip_src, opt->ndpopt_linklayer); |
Samuel Thibault | f7725df | 2016-03-20 16:02:52 +0100 | [diff] [blame] | 177 | t->m_data += NDPOPT_LINKLAYER_LEN; |
Samuel Thibault | e42f869 | 2017-03-26 20:28:11 +0200 | [diff] [blame] | 178 | pl_size += NDPOPT_LINKLAYER_LEN; |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 179 | |
| 180 | /* Prefix information (NDP option) */ |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 181 | struct ndpopt *opt2 = mtod(t, struct ndpopt *); |
| 182 | opt2->ndpopt_type = NDPOPT_PREFIX_INFO; |
| 183 | opt2->ndpopt_len = NDPOPT_PREFIXINFO_LEN / 8; |
| 184 | opt2->ndpopt_prefixinfo.prefix_length = slirp->vprefix_len; |
| 185 | opt2->ndpopt_prefixinfo.L = 1; |
| 186 | opt2->ndpopt_prefixinfo.A = 1; |
| 187 | opt2->ndpopt_prefixinfo.reserved1 = 0; |
| 188 | opt2->ndpopt_prefixinfo.valid_lt = htonl(NDP_AdvValidLifetime); |
| 189 | opt2->ndpopt_prefixinfo.pref_lt = htonl(NDP_AdvPrefLifetime); |
| 190 | opt2->ndpopt_prefixinfo.reserved2 = 0; |
| 191 | opt2->ndpopt_prefixinfo.prefix = slirp->vprefix_addr6; |
Samuel Thibault | f7725df | 2016-03-20 16:02:52 +0100 | [diff] [blame] | 192 | t->m_data += NDPOPT_PREFIXINFO_LEN; |
Samuel Thibault | e42f869 | 2017-03-26 20:28:11 +0200 | [diff] [blame] | 193 | pl_size += NDPOPT_PREFIXINFO_LEN; |
Samuel Thibault | f7725df | 2016-03-20 16:02:52 +0100 | [diff] [blame] | 194 | |
Samuel Thibault | f7725df | 2016-03-20 16:02:52 +0100 | [diff] [blame] | 195 | /* Prefix information (NDP option) */ |
Samuel Thibault | a2f80fd | 2017-03-26 20:46:34 +0200 | [diff] [blame] | 196 | if (get_dns6_addr(&addr, &scope_id) >= 0) { |
| 197 | /* Host system does have an IPv6 DNS server, announce our proxy. */ |
| 198 | struct ndpopt *opt3 = mtod(t, struct ndpopt *); |
| 199 | opt3->ndpopt_type = NDPOPT_RDNSS; |
| 200 | opt3->ndpopt_len = NDPOPT_RDNSS_LEN / 8; |
| 201 | opt3->ndpopt_rdnss.reserved = 0; |
| 202 | opt3->ndpopt_rdnss.lifetime = htonl(2 * NDP_MaxRtrAdvInterval); |
| 203 | opt3->ndpopt_rdnss.addr = slirp->vnameserver_addr6; |
| 204 | t->m_data += NDPOPT_RDNSS_LEN; |
| 205 | pl_size += NDPOPT_RDNSS_LEN; |
| 206 | } |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 207 | |
Samuel Thibault | e42f869 | 2017-03-26 20:28:11 +0200 | [diff] [blame] | 208 | rip->ip_pl = htons(pl_size); |
| 209 | t->m_data -= sizeof(struct ip6) + pl_size; |
| 210 | t->m_len = sizeof(struct ip6) + pl_size; |
| 211 | |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 212 | /* ICMPv6 Checksum */ |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 213 | ricmp->icmp6_cksum = ip6_cksum(t); |
| 214 | |
| 215 | ip6_output(NULL, t, 0); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * Send NDP Neighbor Solitication |
| 220 | */ |
| 221 | void ndp_send_ns(Slirp *slirp, struct in6_addr addr) |
| 222 | { |
| 223 | DEBUG_CALL("ndp_send_ns"); |
| 224 | #if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) |
| 225 | char addrstr[INET6_ADDRSTRLEN]; |
| 226 | inet_ntop(AF_INET6, &addr, addrstr, INET6_ADDRSTRLEN); |
| 227 | DEBUG_ARG("target = %s", addrstr); |
| 228 | #endif |
| 229 | |
| 230 | /* Build IPv6 packet */ |
| 231 | struct mbuf *t = m_get(slirp); |
| 232 | struct ip6 *rip = mtod(t, struct ip6 *); |
| 233 | rip->ip_src = slirp->vhost_addr6; |
| 234 | rip->ip_dst = (struct in6_addr)SOLICITED_NODE_PREFIX; |
| 235 | memcpy(&rip->ip_dst.s6_addr[13], &addr.s6_addr[13], 3); |
| 236 | rip->ip_nh = IPPROTO_ICMPV6; |
| 237 | rip->ip_pl = htons(ICMP6_NDP_NS_MINLEN + NDPOPT_LINKLAYER_LEN); |
| 238 | t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); |
| 239 | |
| 240 | /* Build ICMPv6 packet */ |
| 241 | t->m_data += sizeof(struct ip6); |
| 242 | struct icmp6 *ricmp = mtod(t, struct icmp6 *); |
| 243 | ricmp->icmp6_type = ICMP6_NDP_NS; |
| 244 | ricmp->icmp6_code = 0; |
| 245 | ricmp->icmp6_cksum = 0; |
| 246 | |
| 247 | /* NDP */ |
| 248 | ricmp->icmp6_nns.reserved = 0; |
| 249 | ricmp->icmp6_nns.target = addr; |
| 250 | |
| 251 | /* Build NDP option */ |
| 252 | t->m_data += ICMP6_NDP_NS_MINLEN; |
| 253 | struct ndpopt *opt = mtod(t, struct ndpopt *); |
| 254 | opt->ndpopt_type = NDPOPT_LINKLAYER_SOURCE; |
| 255 | opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; |
| 256 | in6_compute_ethaddr(slirp->vhost_addr6, opt->ndpopt_linklayer); |
| 257 | |
| 258 | /* ICMPv6 Checksum */ |
| 259 | t->m_data -= ICMP6_NDP_NA_MINLEN; |
| 260 | t->m_data -= sizeof(struct ip6); |
| 261 | ricmp->icmp6_cksum = ip6_cksum(t); |
| 262 | |
| 263 | ip6_output(NULL, t, 1); |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * Send NDP Neighbor Advertisement |
| 268 | */ |
| 269 | static void ndp_send_na(Slirp *slirp, struct ip6 *ip, struct icmp6 *icmp) |
| 270 | { |
| 271 | /* Build IPv6 packet */ |
| 272 | struct mbuf *t = m_get(slirp); |
| 273 | struct ip6 *rip = mtod(t, struct ip6 *); |
| 274 | rip->ip_src = icmp->icmp6_nns.target; |
Philippe Mathieu-Daudé | 1120fae | 2018-01-08 14:28:55 -0300 | [diff] [blame] | 275 | if (in6_zero(&ip->ip_src)) { |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 276 | rip->ip_dst = (struct in6_addr)ALLNODES_MULTICAST; |
| 277 | } else { |
| 278 | rip->ip_dst = ip->ip_src; |
| 279 | } |
| 280 | rip->ip_nh = IPPROTO_ICMPV6; |
| 281 | rip->ip_pl = htons(ICMP6_NDP_NA_MINLEN |
| 282 | + NDPOPT_LINKLAYER_LEN); |
| 283 | t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); |
| 284 | |
| 285 | /* Build ICMPv6 packet */ |
| 286 | t->m_data += sizeof(struct ip6); |
| 287 | struct icmp6 *ricmp = mtod(t, struct icmp6 *); |
| 288 | ricmp->icmp6_type = ICMP6_NDP_NA; |
| 289 | ricmp->icmp6_code = 0; |
| 290 | ricmp->icmp6_cksum = 0; |
| 291 | |
| 292 | /* NDP */ |
| 293 | ricmp->icmp6_nna.R = NDP_IsRouter; |
| 294 | ricmp->icmp6_nna.S = !IN6_IS_ADDR_MULTICAST(&rip->ip_dst); |
| 295 | ricmp->icmp6_nna.O = 1; |
| 296 | ricmp->icmp6_nna.reserved_hi = 0; |
| 297 | ricmp->icmp6_nna.reserved_lo = 0; |
| 298 | ricmp->icmp6_nna.target = icmp->icmp6_nns.target; |
| 299 | |
| 300 | /* Build NDP option */ |
| 301 | t->m_data += ICMP6_NDP_NA_MINLEN; |
| 302 | struct ndpopt *opt = mtod(t, struct ndpopt *); |
| 303 | opt->ndpopt_type = NDPOPT_LINKLAYER_TARGET; |
| 304 | opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; |
| 305 | in6_compute_ethaddr(ricmp->icmp6_nna.target, |
| 306 | opt->ndpopt_linklayer); |
| 307 | |
| 308 | /* ICMPv6 Checksum */ |
| 309 | t->m_data -= ICMP6_NDP_NA_MINLEN; |
| 310 | t->m_data -= sizeof(struct ip6); |
| 311 | ricmp->icmp6_cksum = ip6_cksum(t); |
| 312 | |
| 313 | ip6_output(NULL, t, 0); |
| 314 | } |
| 315 | |
| 316 | /* |
| 317 | * Process a NDP message |
| 318 | */ |
| 319 | static void ndp_input(struct mbuf *m, Slirp *slirp, struct ip6 *ip, |
| 320 | struct icmp6 *icmp) |
| 321 | { |
| 322 | m->m_len += ETH_HLEN; |
| 323 | m->m_data -= ETH_HLEN; |
| 324 | struct ethhdr *eth = mtod(m, struct ethhdr *); |
| 325 | m->m_len -= ETH_HLEN; |
| 326 | m->m_data += ETH_HLEN; |
| 327 | |
| 328 | switch (icmp->icmp6_type) { |
| 329 | case ICMP6_NDP_RS: |
| 330 | DEBUG_CALL(" type = Router Solicitation"); |
| 331 | if (ip->ip_hl == 255 |
| 332 | && icmp->icmp6_code == 0 |
| 333 | && ntohs(ip->ip_pl) >= ICMP6_NDP_RS_MINLEN) { |
| 334 | /* Gratuitous NDP */ |
| 335 | ndp_table_add(slirp, ip->ip_src, eth->h_source); |
| 336 | |
| 337 | ndp_send_ra(slirp); |
| 338 | } |
| 339 | break; |
| 340 | |
| 341 | case ICMP6_NDP_RA: |
| 342 | DEBUG_CALL(" type = Router Advertisement"); |
| 343 | qemu_log_mask(LOG_GUEST_ERROR, |
| 344 | "Warning: guest sent NDP RA, but shouldn't"); |
| 345 | break; |
| 346 | |
| 347 | case ICMP6_NDP_NS: |
| 348 | DEBUG_CALL(" type = Neighbor Solicitation"); |
| 349 | if (ip->ip_hl == 255 |
| 350 | && icmp->icmp6_code == 0 |
| 351 | && !IN6_IS_ADDR_MULTICAST(&icmp->icmp6_nns.target) |
| 352 | && ntohs(ip->ip_pl) >= ICMP6_NDP_NS_MINLEN |
Philippe Mathieu-Daudé | 1120fae | 2018-01-08 14:28:55 -0300 | [diff] [blame] | 353 | && (!in6_zero(&ip->ip_src) |
Guillaume Subiron | 0d6ff71 | 2016-03-15 10:31:19 +0100 | [diff] [blame] | 354 | || in6_solicitednode_multicast(&ip->ip_dst))) { |
| 355 | if (in6_equal_host(&icmp->icmp6_nns.target)) { |
| 356 | /* Gratuitous NDP */ |
| 357 | ndp_table_add(slirp, ip->ip_src, eth->h_source); |
| 358 | ndp_send_na(slirp, ip, icmp); |
| 359 | } |
| 360 | } |
| 361 | break; |
| 362 | |
| 363 | case ICMP6_NDP_NA: |
| 364 | DEBUG_CALL(" type = Neighbor Advertisement"); |
| 365 | if (ip->ip_hl == 255 |
| 366 | && icmp->icmp6_code == 0 |
| 367 | && ntohs(ip->ip_pl) >= ICMP6_NDP_NA_MINLEN |
| 368 | && !IN6_IS_ADDR_MULTICAST(&icmp->icmp6_nna.target) |
| 369 | && (!IN6_IS_ADDR_MULTICAST(&ip->ip_dst) |
| 370 | || icmp->icmp6_nna.S == 0)) { |
| 371 | ndp_table_add(slirp, ip->ip_src, eth->h_source); |
| 372 | } |
| 373 | break; |
| 374 | |
| 375 | case ICMP6_NDP_REDIRECT: |
| 376 | DEBUG_CALL(" type = Redirect"); |
| 377 | qemu_log_mask(LOG_GUEST_ERROR, |
| 378 | "Warning: guest sent NDP REDIRECT, but shouldn't"); |
| 379 | break; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* |
| 384 | * Process a received ICMPv6 message. |
| 385 | */ |
| 386 | void icmp6_input(struct mbuf *m) |
| 387 | { |
| 388 | struct icmp6 *icmp; |
| 389 | struct ip6 *ip = mtod(m, struct ip6 *); |
| 390 | Slirp *slirp = m->slirp; |
| 391 | int hlen = sizeof(struct ip6); |
| 392 | |
| 393 | DEBUG_CALL("icmp6_input"); |
| 394 | DEBUG_ARG("m = %lx", (long) m); |
| 395 | DEBUG_ARG("m_len = %d", m->m_len); |
| 396 | |
| 397 | if (ntohs(ip->ip_pl) < ICMP6_MINLEN) { |
| 398 | goto end; |
| 399 | } |
| 400 | |
| 401 | if (ip6_cksum(m)) { |
| 402 | goto end; |
| 403 | } |
| 404 | |
| 405 | m->m_len -= hlen; |
| 406 | m->m_data += hlen; |
| 407 | icmp = mtod(m, struct icmp6 *); |
| 408 | m->m_len += hlen; |
| 409 | m->m_data -= hlen; |
| 410 | |
| 411 | DEBUG_ARG("icmp6_type = %d", icmp->icmp6_type); |
| 412 | switch (icmp->icmp6_type) { |
| 413 | case ICMP6_ECHO_REQUEST: |
| 414 | if (in6_equal_host(&ip->ip_dst)) { |
| 415 | icmp6_send_echoreply(m, slirp, ip, icmp); |
| 416 | } else { |
| 417 | /* TODO */ |
| 418 | error_report("external icmpv6 not supported yet"); |
| 419 | } |
| 420 | break; |
| 421 | |
| 422 | case ICMP6_NDP_RS: |
| 423 | case ICMP6_NDP_RA: |
| 424 | case ICMP6_NDP_NS: |
| 425 | case ICMP6_NDP_NA: |
| 426 | case ICMP6_NDP_REDIRECT: |
| 427 | ndp_input(m, slirp, ip, icmp); |
| 428 | break; |
| 429 | |
| 430 | case ICMP6_UNREACH: |
| 431 | case ICMP6_TOOBIG: |
| 432 | case ICMP6_TIMXCEED: |
| 433 | case ICMP6_PARAMPROB: |
| 434 | /* XXX? report error? close socket? */ |
| 435 | default: |
| 436 | break; |
| 437 | } |
| 438 | |
| 439 | end: |
| 440 | m_free(m); |
| 441 | } |