diff options
Diffstat (limited to 'slirp')
| -rw-r--r-- | slirp/Makefile.objs | 6 | ||||
| -rw-r--r-- | slirp/cksum.c | 25 | ||||
| -rw-r--r-- | slirp/if.c | 2 | ||||
| -rw-r--r-- | slirp/if.h | 4 | ||||
| -rw-r--r-- | slirp/ip6.h | 141 | ||||
| -rw-r--r-- | slirp/ip6_icmp.c | 416 | ||||
| -rw-r--r-- | slirp/ip6_icmp.h | 213 | ||||
| -rw-r--r-- | slirp/ip6_input.c | 73 | ||||
| -rw-r--r-- | slirp/ip6_output.c | 40 | ||||
| -rw-r--r-- | slirp/ip_icmp.c | 12 | ||||
| -rw-r--r-- | slirp/ip_icmp.h | 4 | ||||
| -rw-r--r-- | slirp/ip_input.c | 10 | ||||
| -rw-r--r-- | slirp/libslirp.h | 8 | ||||
| -rw-r--r-- | slirp/mbuf.c | 4 | ||||
| -rw-r--r-- | slirp/ndp_table.c | 90 | ||||
| -rw-r--r-- | slirp/slirp.c | 81 | ||||
| -rw-r--r-- | slirp/slirp.h | 43 | ||||
| -rw-r--r-- | slirp/socket.c | 90 | ||||
| -rw-r--r-- | slirp/socket.h | 13 | ||||
| -rw-r--r-- | slirp/tcp.h | 2 | ||||
| -rw-r--r-- | slirp/tcp_input.c | 222 | ||||
| -rw-r--r-- | slirp/tcp_output.c | 51 | ||||
| -rw-r--r-- | slirp/tcp_subr.c | 114 | ||||
| -rw-r--r-- | slirp/tcp_timer.c | 3 | ||||
| -rw-r--r-- | slirp/tcpip.h | 40 | ||||
| -rw-r--r-- | slirp/tftp.c | 133 | ||||
| -rw-r--r-- | slirp/tftp.h | 7 | ||||
| -rw-r--r-- | slirp/udp.c | 19 | ||||
| -rw-r--r-- | slirp/udp.h | 5 | ||||
| -rw-r--r-- | slirp/udp6.c | 169 |
30 files changed, 1824 insertions, 216 deletions
diff --git a/slirp/Makefile.objs b/slirp/Makefile.objs index 2daa9dc58d..6748e4f60a 100644 --- a/slirp/Makefile.objs +++ b/slirp/Makefile.objs @@ -1,3 +1,5 @@ -common-obj-y = cksum.o if.o ip_icmp.o ip_input.o ip_output.o dnssearch.o +common-obj-y = cksum.o if.o ip_icmp.o ip6_icmp.o ip6_input.o ip6_output.o \ + ip_input.o ip_output.o dnssearch.o common-obj-y += slirp.o mbuf.o misc.o sbuf.o socket.o tcp_input.o tcp_output.o -common-obj-y += tcp_subr.o tcp_timer.o udp.o bootp.o tftp.o arp_table.o +common-obj-y += tcp_subr.o tcp_timer.o udp.o udp6.o bootp.o tftp.o arp_table.o \ + ndp_table.o diff --git a/slirp/cksum.c b/slirp/cksum.c index bc0d017d24..2ad0e6540d 100644 --- a/slirp/cksum.c +++ b/slirp/cksum.c @@ -138,3 +138,28 @@ cont: REDUCE; return (~sum & 0xffff); } + +int ip6_cksum(struct mbuf *m) +{ + /* TODO: Optimize this by being able to pass the ip6_pseudohdr to cksum + * separately from the mbuf */ + struct ip6 save_ip, *ip = mtod(m, struct ip6 *); + struct ip6_pseudohdr *ih = mtod(m, struct ip6_pseudohdr *); + int sum; + + save_ip = *ip; + + ih->ih_src = save_ip.ip_src; + ih->ih_dst = save_ip.ip_dst; + ih->ih_pl = htonl((uint32_t)ntohs(save_ip.ip_pl)); + ih->ih_zero_hi = 0; + ih->ih_zero_lo = 0; + ih->ih_nh = save_ip.ip_nh; + + sum = cksum(m, ((int)sizeof(struct ip6_pseudohdr)) + + ntohl(ih->ih_pl)); + + *ip = save_ip; + + return sum; +} diff --git a/slirp/if.c b/slirp/if.c index 93d7cc0b43..2e21f438e8 100644 --- a/slirp/if.c +++ b/slirp/if.c @@ -194,7 +194,7 @@ void if_start(Slirp *slirp) /* Try to send packet unless it already expired */ if (ifm->expiration_date >= now && !if_encap(slirp, ifm)) { - /* Packet is delayed due to pending ARP resolution */ + /* Packet is delayed due to pending ARP or NDP resolution */ continue; } diff --git a/slirp/if.h b/slirp/if.h index 33270239fd..c7a5c5724d 100644 --- a/slirp/if.h +++ b/slirp/if.h @@ -17,7 +17,7 @@ #define IF_MRU 1500 #define IF_COMP IF_AUTOCOMP /* Flags for compression */ -/* 2 for alignment, 14 for ethernet, 40 for TCP/IP */ -#define IF_MAXLINKHDR (2 + 14 + 40) +/* 2 for alignment, 14 for ethernet */ +#define IF_MAXLINKHDR (2 + ETH_HLEN) #endif diff --git a/slirp/ip6.h b/slirp/ip6.h new file mode 100644 index 0000000000..8ddfa242c4 --- /dev/null +++ b/slirp/ip6.h @@ -0,0 +1,141 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#ifndef SLIRP_IP6_H_ +#define SLIRP_IP6_H_ + +#include "net/eth.h" + +#define ALLNODES_MULTICAST { .s6_addr = \ + { 0xff, 0x02, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x01 } } + +#define SOLICITED_NODE_PREFIX { .s6_addr = \ + { 0xff, 0x02, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x01,\ + 0xff, 0x00, 0x00, 0x00 } } + +#define LINKLOCAL_ADDR { .s6_addr = \ + { 0xfe, 0x80, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x00,\ + 0x00, 0x00, 0x00, 0x02 } } + +static inline bool in6_equal(const struct in6_addr *a, const struct in6_addr *b) +{ + return memcmp(a, b, sizeof(*a)) == 0; +} + +static inline bool in6_equal_net(const struct in6_addr *a, + const struct in6_addr *b, + int prefix_len) +{ + if (memcmp(a, b, prefix_len / 8) != 0) { + return 0; + } + + if (prefix_len % 8 == 0) { + return 1; + } + + return a->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8)) + == b->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8)); +} + +static inline bool in6_equal_mach(const struct in6_addr *a, + const struct in6_addr *b, + int prefix_len) +{ + if (memcmp(&(a->s6_addr[(prefix_len + 7) / 8]), + &(b->s6_addr[(prefix_len + 7) / 8]), + 16 - (prefix_len + 7) / 8) != 0) { + return 0; + } + + if (prefix_len % 8 == 0) { + return 1; + } + + return (a->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1)) + == (b->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1)); +} + + +#define in6_equal_router(a)\ + ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\ + && in6_equal_mach(a, &slirp->vhost_addr6, slirp->vprefix_len))\ + || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\ + && in6_equal_mach(a, &slirp->vhost_addr6, 64))) + +#define in6_equal_dns(a)\ + ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\ + && in6_equal_mach(a, &slirp->vnameserver_addr6, slirp->vprefix_len))\ + || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\ + && in6_equal_mach(a, &slirp->vnameserver_addr6, 64))) + +#define in6_equal_host(a)\ + (in6_equal_router(a) || in6_equal_dns(a)) + +#define in6_solicitednode_multicast(a)\ + (in6_equal_net(a, &(struct in6_addr)SOLICITED_NODE_PREFIX, 104)) + +/* Compute emulated host MAC address from its ipv6 address */ +static inline void in6_compute_ethaddr(struct in6_addr ip, + uint8_t eth[ETH_ALEN]) +{ + eth[0] = 0x52; + eth[1] = 0x56; + memcpy(ð[2], &ip.s6_addr[16 - (ETH_ALEN - 2)], ETH_ALEN - 2); +} + +/* + * Definitions for internet protocol version 6. + * Per RFC 2460, December 1998. + */ +#define IP6VERSION 6 +#define IP6_HOP_LIMIT 255 + +/* + * Structure of an internet header, naked of options. + */ +struct ip6 { +#ifdef HOST_WORDS_BIGENDIAN + uint32_t + ip_v:4, /* version */ + ip_tc_hi:4, /* traffic class */ + ip_tc_lo:4, + ip_fl_hi:4, /* flow label */ + ip_fl_lo:16; +#else + uint32_t + ip_tc_hi:4, + ip_v:4, + ip_fl_hi:4, + ip_tc_lo:4, + ip_fl_lo:16; +#endif + uint16_t ip_pl; /* payload length */ + uint8_t ip_nh; /* next header */ + uint8_t ip_hl; /* hop limit */ + struct in6_addr ip_src, ip_dst; /* source and dest address */ +} QEMU_PACKED; + +/* + * IPv6 pseudo-header used by upper-layer protocols + */ +struct ip6_pseudohdr { + struct in6_addr ih_src; /* source internet address */ + struct in6_addr ih_dst; /* destination internet address */ + uint32_t ih_pl; /* upper-layer packet length */ + uint16_t ih_zero_hi; /* zero */ + uint8_t ih_zero_lo; /* zero */ + uint8_t ih_nh; /* next header */ +} QEMU_PACKED; + + +#endif diff --git a/slirp/ip6_icmp.c b/slirp/ip6_icmp.c new file mode 100644 index 0000000000..9d61349c7d --- /dev/null +++ b/slirp/ip6_icmp.c @@ -0,0 +1,416 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#include "qemu/osdep.h" +#include "slirp.h" +#include "ip6_icmp.h" +#include "qemu/timer.h" +#include "qemu/error-report.h" +#include "qemu/log.h" +#include <time.h> + +#define NDP_Interval g_rand_int_range(slirp->grand, \ + NDP_MinRtrAdvInterval, NDP_MaxRtrAdvInterval) + +static void ra_timer_handler(void *opaque) +{ + Slirp *slirp = opaque; + timer_mod(slirp->ra_timer, + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval); + ndp_send_ra(slirp); +} + +void icmp6_init(Slirp *slirp) +{ + slirp->ra_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, ra_timer_handler, slirp); + timer_mod(slirp->ra_timer, + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + NDP_Interval); +} + +void icmp6_cleanup(Slirp *slirp) +{ + timer_del(slirp->ra_timer); + timer_free(slirp->ra_timer); +} + +static void icmp6_send_echoreply(struct mbuf *m, Slirp *slirp, struct ip6 *ip, + struct icmp6 *icmp) +{ + struct mbuf *t = m_get(slirp); + t->m_len = sizeof(struct ip6) + ntohs(ip->ip_pl); + memcpy(t->m_data, m->m_data, t->m_len); + + /* IPv6 Packet */ + struct ip6 *rip = mtod(t, struct ip6 *); + rip->ip_dst = ip->ip_src; + rip->ip_src = ip->ip_dst; + + /* ICMPv6 packet */ + t->m_data += sizeof(struct ip6); + struct icmp6 *ricmp = mtod(t, struct icmp6 *); + ricmp->icmp6_type = ICMP6_ECHO_REPLY; + ricmp->icmp6_cksum = 0; + + /* Checksum */ + t->m_data -= sizeof(struct ip6); + ricmp->icmp6_cksum = ip6_cksum(t); + + ip6_output(NULL, t, 0); +} + +void icmp6_send_error(struct mbuf *m, uint8_t type, uint8_t code) +{ + Slirp *slirp = m->slirp; + struct mbuf *t; + struct ip6 *ip = mtod(m, struct ip6 *); + + DEBUG_CALL("icmp6_send_error"); + DEBUG_ARGS((dfd, " type = %d, code = %d\n", type, code)); + + if (IN6_IS_ADDR_MULTICAST(&ip->ip_src) || + IN6_IS_ADDR_UNSPECIFIED(&ip->ip_src)) { + /* TODO icmp error? */ + return; + } + + t = m_get(slirp); + + /* IPv6 packet */ + struct ip6 *rip = mtod(t, struct ip6 *); + rip->ip_src = (struct in6_addr)LINKLOCAL_ADDR; + rip->ip_dst = ip->ip_src; +#if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) + char addrstr[INET6_ADDRSTRLEN]; + inet_ntop(AF_INET6, &rip->ip_dst, addrstr, INET6_ADDRSTRLEN); + DEBUG_ARG("target = %s", addrstr); +#endif + + rip->ip_nh = IPPROTO_ICMPV6; + const int error_data_len = min(m->m_len, + IF_MTU - (sizeof(struct ip6) + ICMP6_ERROR_MINLEN)); + rip->ip_pl = htons(ICMP6_ERROR_MINLEN + error_data_len); + t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); + + /* ICMPv6 packet */ + t->m_data += sizeof(struct ip6); + struct icmp6 *ricmp = mtod(t, struct icmp6 *); + ricmp->icmp6_type = type; + ricmp->icmp6_code = code; + ricmp->icmp6_cksum = 0; + + switch (type) { + case ICMP6_UNREACH: + case ICMP6_TIMXCEED: + ricmp->icmp6_err.unused = 0; + break; + case ICMP6_TOOBIG: + ricmp->icmp6_err.mtu = htonl(IF_MTU); + break; + case ICMP6_PARAMPROB: + /* TODO: Handle this case */ + break; + default: + g_assert_not_reached(); + break; + } + t->m_data += ICMP6_ERROR_MINLEN; + memcpy(t->m_data, m->m_data, error_data_len); + + /* Checksum */ + t->m_data -= ICMP6_ERROR_MINLEN; + t->m_data -= sizeof(struct ip6); + ricmp->icmp6_cksum = ip6_cksum(t); + + ip6_output(NULL, t, 0); +} + +/* + * Send NDP Router Advertisement + */ +void ndp_send_ra(Slirp *slirp) +{ + DEBUG_CALL("ndp_send_ra"); + + /* Build IPv6 packet */ + struct mbuf *t = m_get(slirp); + struct ip6 *rip = mtod(t, struct ip6 *); + rip->ip_src = (struct in6_addr)LINKLOCAL_ADDR; + rip->ip_dst = (struct in6_addr)ALLNODES_MULTICAST; + rip->ip_nh = IPPROTO_ICMPV6; + rip->ip_pl = htons(ICMP6_NDP_RA_MINLEN + + NDPOPT_LINKLAYER_LEN + + NDPOPT_PREFIXINFO_LEN); + t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); + + /* Build ICMPv6 packet */ + t->m_data += sizeof(struct ip6); + struct icmp6 *ricmp = mtod(t, struct icmp6 *); + ricmp->icmp6_type = ICMP6_NDP_RA; + ricmp->icmp6_code = 0; + ricmp->icmp6_cksum = 0; + + /* NDP */ + ricmp->icmp6_nra.chl = NDP_AdvCurHopLimit; + ricmp->icmp6_nra.M = NDP_AdvManagedFlag; + ricmp->icmp6_nra.O = NDP_AdvOtherConfigFlag; + ricmp->icmp6_nra.reserved = 0; + ricmp->icmp6_nra.lifetime = htons(NDP_AdvDefaultLifetime); + ricmp->icmp6_nra.reach_time = htonl(NDP_AdvReachableTime); + ricmp->icmp6_nra.retrans_time = htonl(NDP_AdvRetransTime); + + /* Source link-layer address (NDP option) */ + t->m_data += ICMP6_NDP_RA_MINLEN; + struct ndpopt *opt = mtod(t, struct ndpopt *); + opt->ndpopt_type = NDPOPT_LINKLAYER_SOURCE; + opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; + in6_compute_ethaddr(rip->ip_src, opt->ndpopt_linklayer); + + /* Prefix information (NDP option) */ + t->m_data += NDPOPT_LINKLAYER_LEN; + struct ndpopt *opt2 = mtod(t, struct ndpopt *); + opt2->ndpopt_type = NDPOPT_PREFIX_INFO; + opt2->ndpopt_len = NDPOPT_PREFIXINFO_LEN / 8; + opt2->ndpopt_prefixinfo.prefix_length = slirp->vprefix_len; + opt2->ndpopt_prefixinfo.L = 1; + opt2->ndpopt_prefixinfo.A = 1; + opt2->ndpopt_prefixinfo.reserved1 = 0; + opt2->ndpopt_prefixinfo.valid_lt = htonl(NDP_AdvValidLifetime); + opt2->ndpopt_prefixinfo.pref_lt = htonl(NDP_AdvPrefLifetime); + opt2->ndpopt_prefixinfo.reserved2 = 0; + opt2->ndpopt_prefixinfo.prefix = slirp->vprefix_addr6; + + /* ICMPv6 Checksum */ + t->m_data -= NDPOPT_LINKLAYER_LEN; + t->m_data -= ICMP6_NDP_RA_MINLEN; + t->m_data -= sizeof(struct ip6); + ricmp->icmp6_cksum = ip6_cksum(t); + + ip6_output(NULL, t, 0); +} + +/* + * Send NDP Neighbor Solitication + */ +void ndp_send_ns(Slirp *slirp, struct in6_addr addr) +{ + DEBUG_CALL("ndp_send_ns"); +#if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) + char addrstr[INET6_ADDRSTRLEN]; + inet_ntop(AF_INET6, &addr, addrstr, INET6_ADDRSTRLEN); + DEBUG_ARG("target = %s", addrstr); +#endif + + /* Build IPv6 packet */ + struct mbuf *t = m_get(slirp); + struct ip6 *rip = mtod(t, struct ip6 *); + rip->ip_src = slirp->vhost_addr6; + rip->ip_dst = (struct in6_addr)SOLICITED_NODE_PREFIX; + memcpy(&rip->ip_dst.s6_addr[13], &addr.s6_addr[13], 3); + rip->ip_nh = IPPROTO_ICMPV6; + rip->ip_pl = htons(ICMP6_NDP_NS_MINLEN + NDPOPT_LINKLAYER_LEN); + t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); + + /* Build ICMPv6 packet */ + t->m_data += sizeof(struct ip6); + struct icmp6 *ricmp = mtod(t, struct icmp6 *); + ricmp->icmp6_type = ICMP6_NDP_NS; + ricmp->icmp6_code = 0; + ricmp->icmp6_cksum = 0; + + /* NDP */ + ricmp->icmp6_nns.reserved = 0; + ricmp->icmp6_nns.target = addr; + + /* Build NDP option */ + t->m_data += ICMP6_NDP_NS_MINLEN; + struct ndpopt *opt = mtod(t, struct ndpopt *); + opt->ndpopt_type = NDPOPT_LINKLAYER_SOURCE; + opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; + in6_compute_ethaddr(slirp->vhost_addr6, opt->ndpopt_linklayer); + + /* ICMPv6 Checksum */ + t->m_data -= ICMP6_NDP_NA_MINLEN; + t->m_data -= sizeof(struct ip6); + ricmp->icmp6_cksum = ip6_cksum(t); + + ip6_output(NULL, t, 1); +} + +/* + * Send NDP Neighbor Advertisement + */ +static void ndp_send_na(Slirp *slirp, struct ip6 *ip, struct icmp6 *icmp) +{ + /* Build IPv6 packet */ + struct mbuf *t = m_get(slirp); + struct ip6 *rip = mtod(t, struct ip6 *); + rip->ip_src = icmp->icmp6_nns.target; + if (IN6_IS_ADDR_UNSPECIFIED(&ip->ip_src)) { + rip->ip_dst = (struct in6_addr)ALLNODES_MULTICAST; + } else { + rip->ip_dst = ip->ip_src; + } + rip->ip_nh = IPPROTO_ICMPV6; + rip->ip_pl = htons(ICMP6_NDP_NA_MINLEN + + NDPOPT_LINKLAYER_LEN); + t->m_len = sizeof(struct ip6) + ntohs(rip->ip_pl); + + /* Build ICMPv6 packet */ + t->m_data += sizeof(struct ip6); + struct icmp6 *ricmp = mtod(t, struct icmp6 *); + ricmp->icmp6_type = ICMP6_NDP_NA; + ricmp->icmp6_code = 0; + ricmp->icmp6_cksum = 0; + + /* NDP */ + ricmp->icmp6_nna.R = NDP_IsRouter; + ricmp->icmp6_nna.S = !IN6_IS_ADDR_MULTICAST(&rip->ip_dst); + ricmp->icmp6_nna.O = 1; + ricmp->icmp6_nna.reserved_hi = 0; + ricmp->icmp6_nna.reserved_lo = 0; + ricmp->icmp6_nna.target = icmp->icmp6_nns.target; + + /* Build NDP option */ + t->m_data += ICMP6_NDP_NA_MINLEN; + struct ndpopt *opt = mtod(t, struct ndpopt *); + opt->ndpopt_type = NDPOPT_LINKLAYER_TARGET; + opt->ndpopt_len = NDPOPT_LINKLAYER_LEN / 8; + in6_compute_ethaddr(ricmp->icmp6_nna.target, + opt->ndpopt_linklayer); + + /* ICMPv6 Checksum */ + t->m_data -= ICMP6_NDP_NA_MINLEN; + t->m_data -= sizeof(struct ip6); + ricmp->icmp6_cksum = ip6_cksum(t); + + ip6_output(NULL, t, 0); +} + +/* + * Process a NDP message + */ +static void ndp_input(struct mbuf *m, Slirp *slirp, struct ip6 *ip, + struct icmp6 *icmp) +{ + m->m_len += ETH_HLEN; + m->m_data -= ETH_HLEN; + struct ethhdr *eth = mtod(m, struct ethhdr *); + m->m_len -= ETH_HLEN; + m->m_data += ETH_HLEN; + + switch (icmp->icmp6_type) { + case ICMP6_NDP_RS: + DEBUG_CALL(" type = Router Solicitation"); + if (ip->ip_hl == 255 + && icmp->icmp6_code == 0 + && ntohs(ip->ip_pl) >= ICMP6_NDP_RS_MINLEN) { + /* Gratuitous NDP */ + ndp_table_add(slirp, ip->ip_src, eth->h_source); + + ndp_send_ra(slirp); + } + break; + + case ICMP6_NDP_RA: + DEBUG_CALL(" type = Router Advertisement"); + qemu_log_mask(LOG_GUEST_ERROR, + "Warning: guest sent NDP RA, but shouldn't"); + break; + + case ICMP6_NDP_NS: + DEBUG_CALL(" type = Neighbor Solicitation"); + if (ip->ip_hl == 255 + && icmp->icmp6_code == 0 + && !IN6_IS_ADDR_MULTICAST(&icmp->icmp6_nns.target) + && ntohs(ip->ip_pl) >= ICMP6_NDP_NS_MINLEN + && (!IN6_IS_ADDR_UNSPECIFIED(&ip->ip_src) + || in6_solicitednode_multicast(&ip->ip_dst))) { + if (in6_equal_host(&icmp->icmp6_nns.target)) { + /* Gratuitous NDP */ + ndp_table_add(slirp, ip->ip_src, eth->h_source); + ndp_send_na(slirp, ip, icmp); + } + } + break; + + case ICMP6_NDP_NA: + DEBUG_CALL(" type = Neighbor Advertisement"); + if (ip->ip_hl == 255 + && icmp->icmp6_code == 0 + && ntohs(ip->ip_pl) >= ICMP6_NDP_NA_MINLEN + && !IN6_IS_ADDR_MULTICAST(&icmp->icmp6_nna.target) + && (!IN6_IS_ADDR_MULTICAST(&ip->ip_dst) + || icmp->icmp6_nna.S == 0)) { + ndp_table_add(slirp, ip->ip_src, eth->h_source); + } + break; + + case ICMP6_NDP_REDIRECT: + DEBUG_CALL(" type = Redirect"); + qemu_log_mask(LOG_GUEST_ERROR, + "Warning: guest sent NDP REDIRECT, but shouldn't"); + break; + } +} + +/* + * Process a received ICMPv6 message. + */ +void icmp6_input(struct mbuf *m) +{ + struct icmp6 *icmp; + struct ip6 *ip = mtod(m, struct ip6 *); + Slirp *slirp = m->slirp; + int hlen = sizeof(struct ip6); + + DEBUG_CALL("icmp6_input"); + DEBUG_ARG("m = %lx", (long) m); + DEBUG_ARG("m_len = %d", m->m_len); + + if (ntohs(ip->ip_pl) < ICMP6_MINLEN) { + goto end; + } + + if (ip6_cksum(m)) { + goto end; + } + + m->m_len -= hlen; + m->m_data += hlen; + icmp = mtod(m, struct icmp6 *); + m->m_len += hlen; + m->m_data -= hlen; + + DEBUG_ARG("icmp6_type = %d", icmp->icmp6_type); + switch (icmp->icmp6_type) { + case ICMP6_ECHO_REQUEST: + if (in6_equal_host(&ip->ip_dst)) { + icmp6_send_echoreply(m, slirp, ip, icmp); + } else { + /* TODO */ + error_report("external icmpv6 not supported yet"); + } + break; + + case ICMP6_NDP_RS: + case ICMP6_NDP_RA: + case ICMP6_NDP_NS: + case ICMP6_NDP_NA: + case ICMP6_NDP_REDIRECT: + ndp_input(m, slirp, ip, icmp); + break; + + case ICMP6_UNREACH: + case ICMP6_TOOBIG: + case ICMP6_TIMXCEED: + case ICMP6_PARAMPROB: + /* XXX? report error? close socket? */ + default: + break; + } + +end: + m_free(m); +} diff --git a/slirp/ip6_icmp.h b/slirp/ip6_icmp.h new file mode 100644 index 0000000000..9460bf837a --- /dev/null +++ b/slirp/ip6_icmp.h @@ -0,0 +1,213 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#ifndef SLIRP_NETINET_ICMP6_H_ +#define SLIRP_NETINET_ICMP6_H_ + +/* + * Interface Control Message Protocol version 6 Definitions. + * Per RFC 4443, March 2006. + * + * Network Discover Protocol Definitions. + * Per RFC 4861, September 2007. + */ + +struct icmp6_echo { /* Echo Messages */ + uint16_t id; + uint16_t seq_num; +}; + +union icmp6_error_body { + uint32_t unused; + uint32_t pointer; + uint32_t mtu; +}; + +/* + * NDP Messages + */ +struct ndp_rs { /* Router Solicitation Message */ + uint32_t reserved; +}; + +struct ndp_ra { /* Router Advertisement Message */ + uint8_t chl; /* Cur Hop Limit */ +#ifdef HOST_WORDS_BIGENDIAN + uint8_t + M:1, + O:1, + reserved:6; +#else + uint8_t + reserved:6, + O:1, + M:1; +#endif + uint16_t lifetime; /* Router Lifetime */ + uint32_t reach_time; /* Reachable Time */ + uint32_t retrans_time; /* Retrans Timer */ +} QEMU_PACKED; + +struct ndp_ns { /* Neighbor Solicitation Message */ + uint32_t reserved; + struct in6_addr target; /* Target Address */ +} QEMU_PACKED; + +struct ndp_na { /* Neighbor Advertisement Message */ +#ifdef HOST_WORDS_BIGENDIAN + uint32_t + R:1, /* Router Flag */ + S:1, /* Solicited Flag */ + O:1, /* Override Flag */ + reserved_hi:5, + reserved_lo:24; +#else + uint32_t + reserved_hi:5, + O:1, + S:1, + R:1, + reserved_lo:24; +#endif + struct in6_addr target; /* Target Address */ +} QEMU_PACKED; + +struct ndp_redirect { + uint32_t reserved; + struct in6_addr target; /* Target Address */ + struct in6_addr dest; /* Destination Address */ +} QEMU_PACKED; + +/* + * Structure of an icmpv6 header. + */ +struct icmp6 { + uint8_t icmp6_type; /* type of message, see below */ + uint8_t icmp6_code; /* type sub code */ + uint16_t icmp6_cksum; /* ones complement cksum of struct */ + union { + union icmp6_error_body error_body; + struct icmp6_echo echo; + struct ndp_rs ndp_rs; + struct ndp_ra ndp_ra; + struct ndp_ns ndp_ns; + struct ndp_na ndp_na; + struct ndp_redirect ndp_redirect; + } icmp6_body; +#define icmp6_err icmp6_body.error_body +#define icmp6_echo icmp6_body.echo +#define icmp6_nrs icmp6_body.ndp_rs +#define icmp6_nra icmp6_body.ndp_ra +#define icmp6_nns icmp6_body.ndp_ns +#define icmp6_nna icmp6_body.ndp_na +#define icmp6_redirect icmp6_body.ndp_redirect +} QEMU_PACKED; + +#define ICMP6_MINLEN 4 +#define ICMP6_ERROR_MINLEN 8 +#define ICMP6_ECHO_MINLEN 8 +#define ICMP6_NDP_RS_MINLEN 8 +#define ICMP6_NDP_RA_MINLEN 16 +#define ICMP6_NDP_NS_MINLEN 24 +#define ICMP6_NDP_NA_MINLEN 24 +#define ICMP6_NDP_REDIRECT_MINLEN 40 + +/* + * NDP Options + */ +struct ndpopt { + uint8_t ndpopt_type; /* Option type */ + uint8_t ndpopt_len; /* /!\ In units of 8 octets */ + union { + unsigned char linklayer_addr[6]; /* Source/Target Link-layer */ + struct prefixinfo { /* Prefix Information */ + uint8_t prefix_length; +#ifdef HOST_WORDS_BIGENDIAN + uint8_t L:1, A:1, reserved1:6; +#else + uint8_t reserved1:6, A:1, L:1; +#endif + uint32_t valid_lt; /* Valid Lifetime */ + uint32_t pref_lt; /* Preferred Lifetime */ + uint32_t reserved2; + struct in6_addr prefix; + } QEMU_PACKED prefixinfo; + } ndpopt_body; +#define ndpopt_linklayer ndpopt_body.linklayer_addr +#define ndpopt_prefixinfo ndpopt_body.prefixinfo +} QEMU_PACKED; + +/* NDP options type */ +#define NDPOPT_LINKLAYER_SOURCE 1 /* Source Link-Layer Address */ +#define NDPOPT_LINKLAYER_TARGET 2 /* Target Link-Layer Address */ +#define NDPOPT_PREFIX_INFO 3 /* Prefix Information */ + +/* NDP options size, in octets. */ +#define NDPOPT_LINKLAYER_LEN 8 +#define NDPOPT_PREFIXINFO_LEN 32 + +/* + * Definition of type and code field values. + * Per https://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml + * Last Updated 2012-11-12 + */ + +/* Errors */ +#define ICMP6_UNREACH 1 /* Destination Unreachable */ +#define ICMP6_UNREACH_NO_ROUTE 0 /* no route to dest */ +#define ICMP6_UNREACH_DEST_PROHIB 1 /* com with dest prohibited */ +#define ICMP6_UNREACH_SCOPE 2 /* beyond scope of src addr */ +#define ICMP6_UNREACH_ADDRESS 3 /* address unreachable */ +#define ICMP6_UNREACH_PORT 4 /* port unreachable */ +#define ICMP6_UNREACH_SRC_FAIL 5 /* src addr failed */ +#define ICMP6_UNREACH_REJECT_ROUTE 6 /* reject route to dest */ +#define ICMP6_UNREACH_SRC_HDR_ERROR 7 /* error in src routing header */ +#define ICMP6_TOOBIG 2 /* Packet Too Big */ +#define ICMP6_TIMXCEED 3 /* Time Exceeded */ +#define ICMP6_TIMXCEED_INTRANS 0 /* hop limit exceeded in transit */ +#define ICMP6_TIMXCEED_REASS 1 /* ttl=0 in reass */ +#define ICMP6_PARAMPROB 4 /* Parameter Problem */ +#define ICMP6_PARAMPROB_HDR_FIELD 0 /* err header field */ +#define ICMP6_PARAMPROB_NXTHDR_TYPE 1 /* unrecognized Next Header type */ +#define ICMP6_PARAMPROB_IPV6_OPT 2 /* unrecognized IPv6 option */ + +/* Informational Messages */ +#define ICMP6_ECHO_REQUEST 128 /* Echo Request */ +#define ICMP6_ECHO_REPLY 129 /* Echo Reply */ +#define ICMP6_NDP_RS 133 /* Router Solicitation (NDP) */ +#define ICMP6_NDP_RA 134 /* Router Advertisement (NDP) */ +#define ICMP6_NDP_NS 135 /* Neighbor Solicitation (NDP) */ +#define ICMP6_NDP_NA 136 /* Neighbor Advertisement (NDP) */ +#define ICMP6_NDP_REDIRECT 137 /* Redirect Message (NDP) */ + +/* + * Router Configuration Variables (rfc4861#section-6) + */ +#define NDP_IsRouter 1 +#define NDP_AdvSendAdvertisements 1 +#define NDP_MaxRtrAdvInterval 600000 +#define NDP_MinRtrAdvInterval ((NDP_MaxRtrAdvInterval >= 9) ? \ + NDP_MaxRtrAdvInterval / 3 : \ + NDP_MaxRtrAdvInterval) +#define NDP_AdvManagedFlag 0 +#define NDP_AdvOtherConfigFlag 0 +#define NDP_AdvLinkMTU 0 +#define NDP_AdvReachableTime 0 +#define NDP_AdvRetransTime 0 +#define NDP_AdvCurHopLimit 64 +#define NDP_AdvDefaultLifetime ((3 * NDP_MaxRtrAdvInterval) / 1000) +#define NDP_AdvValidLifetime 86400 +#define NDP_AdvOnLinkFlag 1 +#define NDP_AdvPrefLifetime 14400 +#define NDP_AdvAutonomousFlag 1 + +void icmp6_init(Slirp *slirp); +void icmp6_cleanup(Slirp *slirp); +void icmp6_input(struct mbuf *); +void icmp6_send_error(struct mbuf *m, uint8_t type, uint8_t code); +void ndp_send_ra(Slirp *slirp); +void ndp_send_ns(Slirp *slirp, struct in6_addr addr); + +#endif diff --git a/slirp/ip6_input.c b/slirp/ip6_input.c new file mode 100644 index 0000000000..c0b11e73cd --- /dev/null +++ b/slirp/ip6_input.c @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#include "qemu/osdep.h" +#include "slirp.h" +#include "ip6_icmp.h" + +/* + * IP initialization: fill in IP protocol switch table. + * All protocols not implemented in kernel go to raw IP protocol handler. + */ +void ip6_init(Slirp *slirp) +{ + icmp6_init(slirp); +} + +void ip6_cleanup(Slirp *slirp) +{ + icmp6_cleanup(slirp); +} + +void ip6_input(struct mbuf *m) +{ + struct ip6 *ip6; + + DEBUG_CALL("ip6_input"); + DEBUG_ARG("m = %lx", (long)m); + DEBUG_ARG("m_len = %d", m->m_len); + + if (m->m_len < sizeof(struct ip6)) { + goto bad; + } + + ip6 = mtod(m, struct ip6 *); + + if (ip6->ip_v != IP6VERSION) { + goto bad; + } + + if (ntohs(ip6->ip_pl) > IF_MTU) { + icmp6_send_error(m, ICMP6_TOOBIG, 0); + goto bad; + } + + /* check ip_ttl for a correct ICMP reply */ + if (ip6->ip_hl == 0) { + icmp6_send_error(m, ICMP6_TIMXCEED, ICMP6_TIMXCEED_INTRANS); + goto bad; + } + + /* + * Switch out to protocol's input routine. + */ + switch (ip6->ip_nh) { + case IPPROTO_TCP: + NTOHS(ip6->ip_pl); + tcp_input(m, sizeof(struct ip6), (struct socket *)NULL, AF_INET6); + break; + case IPPROTO_UDP: + udp6_input(m); + break; + case IPPROTO_ICMPV6: + icmp6_input(m); + break; + default: + m_free(m); + } + return; +bad: + m_free(m); +} diff --git a/slirp/ip6_output.c b/slirp/ip6_output.c new file mode 100644 index 0000000000..762cbfe89c --- /dev/null +++ b/slirp/ip6_output.c @@ -0,0 +1,40 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "slirp.h" + +/* Number of packets queued before we start sending + * (to prevent allocing too many mbufs) */ +#define IF6_THRESH 10 + +/* + * IPv6 output. The packet in mbuf chain m contains a IP header + */ +int ip6_output(struct socket *so, struct mbuf *m, int fast) +{ + struct ip6 *ip = mtod(m, struct ip6 *); + + DEBUG_CALL("ip6_output"); + DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("m = %lx", (long)m); + + /* Fill IPv6 header */ + ip->ip_v = IP6VERSION; + ip->ip_hl = IP6_HOP_LIMIT; + ip->ip_tc_hi = 0; + ip->ip_tc_lo = 0; + ip->ip_fl_hi = 0; + ip->ip_fl_lo = 0; + + if (fast) { + if_encap(m->slirp, m); + } else { + if_output(so, m); + } + + return 0; +} diff --git a/slirp/ip_icmp.c b/slirp/ip_icmp.c index ace39821d9..590dada0aa 100644 --- a/slirp/ip_icmp.c +++ b/slirp/ip_icmp.c @@ -38,7 +38,7 @@ /* Be nice and tell them it's just a pseudo-ping packet */ static const char icmp_ping_msg[] = "This is a pseudo-PING packet used by Slirp to emulate ICMP ECHO-REQUEST packets.\n"; -/* list of actions for icmp_error() on RX of an icmp message */ +/* list of actions for icmp_send_error() on RX of an icmp message */ static const int icmp_flush[19] = { /* ECHO REPLY (0) */ 0, 1, @@ -101,7 +101,7 @@ static int icmp_send(struct socket *so, struct mbuf *m, int hlen) (struct sockaddr *)&addr, sizeof(addr)) == -1) { DEBUG_MISC((dfd, "icmp_input icmp sendto tx errno = %d-%s\n", errno, strerror(errno))); - icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, strerror(errno)); + icmp_send_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, strerror(errno)); icmp_detach(so); } @@ -189,7 +189,7 @@ icmp_input(struct mbuf *m, int hlen) (struct sockaddr *)&addr, sizeof(addr)) == -1) { DEBUG_MISC((dfd,"icmp_input udp sendto tx errno = %d-%s\n", errno,strerror(errno))); - icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno)); + icmp_send_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, strerror(errno)); udp_detach(so); } } /* if ip->ip_dst.s_addr == alias_addr.s_addr */ @@ -235,7 +235,7 @@ end_error: #define ICMP_MAXDATALEN (IP_MSS-28) void -icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize, +icmp_send_error(struct mbuf *msrc, u_char type, u_char code, int minsize, const char *message) { unsigned hlen, shlen, s_ip_len; @@ -243,7 +243,7 @@ icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize, register struct icmp *icp; register struct mbuf *m; - DEBUG_CALL("icmp_error"); + DEBUG_CALL("icmp_send_error"); DEBUG_ARG("msrc = %p", msrc); DEBUG_ARG("msrc_len = %d", msrc->m_len); @@ -433,7 +433,7 @@ void icmp_receive(struct socket *so) } DEBUG_MISC((dfd, " udp icmp rx errno = %d-%s\n", errno, strerror(errno))); - icmp_error(so->so_m, ICMP_UNREACH, error_code, 0, strerror(errno)); + icmp_send_error(so->so_m, ICMP_UNREACH, error_code, 0, strerror(errno)); } else { icmp_reflect(so->so_m); so->so_m = NULL; /* Don't m_free() it again! */ diff --git a/slirp/ip_icmp.h b/slirp/ip_icmp.h index be4426b8e7..846761d08e 100644 --- a/slirp/ip_icmp.h +++ b/slirp/ip_icmp.h @@ -156,8 +156,8 @@ struct icmp { void icmp_init(Slirp *slirp); void icmp_cleanup(Slirp *slirp); void icmp_input(struct mbuf *, int); -void icmp_error(struct mbuf *msrc, u_char type, u_char code, int minsize, - const char *message); +void icmp_send_error(struct mbuf *msrc, u_char type, u_char code, int minsize, + const char *message); void icmp_reflect(struct mbuf *); void icmp_receive(struct socket *so); void icmp_detach(struct socket *so); diff --git a/slirp/ip_input.c b/slirp/ip_input.c index e4855ae0f0..12f173de6c 100644 --- a/slirp/ip_input.c +++ b/slirp/ip_input.c @@ -132,9 +132,9 @@ ip_input(struct mbuf *m) m_adj(m, ip->ip_len - m->m_len); /* check ip_ttl for a correct ICMP reply */ - if(ip->ip_ttl==0) { - icmp_error(m, ICMP_TIMXCEED,ICMP_TIMXCEED_INTRANS, 0,"ttl"); - goto bad; + if (ip->ip_ttl == 0) { + icmp_send_error(m, ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS, 0, "ttl"); + goto bad; } /* @@ -200,7 +200,7 @@ ip_input(struct mbuf *m) */ switch (ip->ip_p) { case IPPROTO_TCP: - tcp_input(m, hlen, (struct socket *)NULL); + tcp_input(m, hlen, (struct socket *)NULL, AF_INET); break; case IPPROTO_UDP: udp_input(m, hlen); @@ -637,7 +637,7 @@ typedef uint32_t n_time; } return (0); bad: - icmp_error(m, type, code, 0, 0); + icmp_send_error(m, type, code, 0, 0); return (1); } diff --git a/slirp/libslirp.h b/slirp/libslirp.h index 5bdcbd50f7..c4b25c90e6 100644 --- a/slirp/libslirp.h +++ b/slirp/libslirp.h @@ -10,9 +10,11 @@ int get_dns_addr(struct in_addr *pdns_addr); Slirp *slirp_init(int restricted, struct in_addr vnetwork, struct in_addr vnetmask, struct in_addr vhost, - const char *vhostname, const char *tftp_path, - const char *bootfile, struct in_addr vdhcp_start, - struct in_addr vnameserver, const char **vdnssearch, + struct in6_addr vprefix_addr6, uint8_t vprefix_len, + struct in6_addr vhost6, const char *vhostname, + const char *tftp_path, const char *bootfile, + struct in_addr vdhcp_start, struct in_addr vnameserver, + struct in6_addr vnameserver6, const char **vdnssearch, void *opaque); void slirp_cleanup(Slirp *slirp); diff --git a/slirp/mbuf.c b/slirp/mbuf.c index c959758465..d688dd43f7 100644 --- a/slirp/mbuf.c +++ b/slirp/mbuf.c @@ -22,9 +22,9 @@ /* * Find a nice value for msize - * XXX if_maxlinkhdr already in mtu */ -#define SLIRP_MSIZE (IF_MTU + IF_MAXLINKHDR + offsetof(struct mbuf, m_dat) + 6) +#define SLIRP_MSIZE\ + (offsetof(struct mbuf, m_dat) + IF_MAXLINKHDR + TCPIPHDR_DELTA + IF_MTU) void m_init(Slirp *slirp) diff --git a/slirp/ndp_table.c b/slirp/ndp_table.c new file mode 100644 index 0000000000..9d4c39b45c --- /dev/null +++ b/slirp/ndp_table.c @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne. + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "slirp.h" + +void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr, + uint8_t ethaddr[ETH_ALEN]) +{ + NdpTable *ndp_table = &slirp->ndp_table; + int i; + + DEBUG_CALL("ndp_table_add"); +#if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) + char addrstr[INET6_ADDRSTRLEN]; + inet_ntop(AF_INET6, &(ip_addr), addrstr, INET6_ADDRSTRLEN); + DEBUG_ARG("ip = %s", addrstr); +#endif + DEBUG_ARGS((dfd, " hw addr = %02x:%02x:%02x:%02x:%02x:%02x\n", + ethaddr[0], ethaddr[1], ethaddr[2], + ethaddr[3], ethaddr[4], ethaddr[5])); + + if (IN6_IS_ADDR_MULTICAST(&ip_addr) || IN6_IS_ADDR_UNSPECIFIED(&ip_addr)) { + /* Do not register multicast or unspecified addresses */ + DEBUG_CALL(" abort: do not register multicast or unspecified address"); + return; + } + + /* Search for an entry */ + for (i = 0; i < NDP_TABLE_SIZE; i++) { + if (in6_equal(&ndp_table->table[i].ip_addr, &ip_addr)) { + DEBUG_CALL(" already in table: update the entry"); + /* Update the entry */ + memcpy(ndp_table->table[i].eth_addr, ethaddr, ETH_ALEN); + return; + } + } + + /* No entry found, create a new one */ + DEBUG_CALL(" create new entry"); + ndp_table->table[ndp_table->next_victim].ip_addr = ip_addr; + memcpy(ndp_table->table[ndp_table->next_victim].eth_addr, + ethaddr, ETH_ALEN); + ndp_table->next_victim = (ndp_table->next_victim + 1) % NDP_TABLE_SIZE; +} + +bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr, + uint8_t out_ethaddr[ETH_ALEN]) +{ + NdpTable *ndp_table = &slirp->ndp_table; + int i; + + DEBUG_CALL("ndp_table_search"); +#if !defined(_WIN32) || (_WIN32_WINNT >= 0x0600) + char addrstr[INET6_ADDRSTRLEN]; + inet_ntop(AF_INET6, &(ip_addr), addrstr, INET6_ADDRSTRLEN); + DEBUG_ARG("ip = %s", addrstr); +#endif + + assert(!IN6_IS_ADDR_UNSPECIFIED(&ip_addr)); + + /* Multicast address: fec0::abcd:efgh/8 -> 33:33:ab:cd:ef:gh */ + if (IN6_IS_ADDR_MULTICAST(&ip_addr)) { + out_ethaddr[0] = 0x33; out_ethaddr[1] = 0x33; + out_ethaddr[2] = ip_addr.s6_addr[12]; + out_ethaddr[3] = ip_addr.s6_addr[13]; + out_ethaddr[4] = ip_addr.s6_addr[14]; + out_ethaddr[5] = ip_addr.s6_addr[15]; + DEBUG_ARGS((dfd, " multicast addr = %02x:%02x:%02x:%02x:%02x:%02x\n", + out_ethaddr[0], out_ethaddr[1], out_ethaddr[2], + out_ethaddr[3], out_ethaddr[4], out_ethaddr[5])); + return 1; + } + + for (i = 0; i < NDP_TABLE_SIZE; i++) { + if (in6_equal(&ndp_table->table[i].ip_addr, &ip_addr)) { + memcpy(out_ethaddr, ndp_table->table[i].eth_addr, ETH_ALEN); + DEBUG_ARGS((dfd, " found hw addr = %02x:%02x:%02x:%02x:%02x:%02x\n", + out_ethaddr[0], out_ethaddr[1], out_ethaddr[2], + out_ethaddr[3], out_ethaddr[4], out_ethaddr[5])); + return 1; + } + } + + DEBUG_CALL(" ip not found in table"); + return 0; +} diff --git a/slirp/slirp.c b/slirp/slirp.c index 0466d330da..9ccf4157d8 100644 --- a/slirp/slirp.c +++ b/slirp/slirp.c @@ -201,19 +201,23 @@ static int slirp_state_load(QEMUFile *f, void *opaque, int version_id); Slirp *slirp_init(int restricted, struct in_addr vnetwork, struct in_addr vnetmask, struct in_addr vhost, - const char *vhostname, const char *tftp_path, - const char *bootfile, struct in_addr vdhcp_start, - struct in_addr vnameserver, const char **vdnssearch, + struct in6_addr vprefix_addr6, uint8_t vprefix_len, + struct in6_addr vhost6, const char *vhostname, + const char *tftp_path, const char *bootfile, + struct in_addr vdhcp_start, struct in_addr vnameserver, + struct in6_addr vnameserver6, const char **vdnssearch, void *opaque) { Slirp *slirp = g_malloc0(sizeof(Slirp)); slirp_init_once(); + slirp->grand = g_rand_new(); slirp->restricted = restricted; if_init(slirp); ip_init(slirp); + ip6_init(slirp); /* Initialise mbufs *after* setting the MTU */ m_init(slirp); @@ -221,6 +225,9 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork, slirp->vnetwork_addr = vnetwork; slirp->vnetwork_mask = vnetmask; slirp->vhost_addr = vhost; + slirp->vprefix_addr6 = vprefix_addr6; + slirp->vprefix_len = vprefix_len; + slirp->vhost_addr6 = vhost6; if (vhostname) { pstrcpy(slirp->client_hostname, sizeof(slirp->client_hostname), vhostname); @@ -229,6 +236,7 @@ Slirp *slirp_init(int restricted, struct in_addr vnetwork, slirp->bootp_filename = g_strdup(bootfile); slirp->vdhcp_startaddr = vdhcp_start; slirp->vnameserver_addr = vnameserver; + slirp->vnameserver_addr6 = vnameserver6; if (vdnssearch) { translate_dnssearch(slirp, vdnssearch); @@ -251,8 +259,11 @@ void slirp_cleanup(Slirp *slirp) unregister_savevm(NULL, "slirp", slirp); ip_cleanup(slirp); + ip6_cleanup(slirp); m_cleanup(slirp); + g_rand_free(slirp->grand); + g_free(slirp->vdnssearch); g_free(slirp->tftp_prefix); g_free(slirp->bootp_filename); @@ -568,7 +579,8 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error) /* * Continue tcp_input */ - tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); + tcp_input((struct mbuf *)NULL, sizeof(struct ip), so, + so->so_ffamily); /* continue; */ } else { ret = sowrite(so); @@ -617,7 +629,8 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error) } } - tcp_input((struct mbuf *)NULL, sizeof(struct ip), so); + tcp_input((struct mbuf *)NULL, sizeof(struct ip), so, + so->so_ffamily); } /* SS_ISFCONNECTING */ #endif } @@ -744,21 +757,28 @@ void slirp_input(Slirp *slirp, const uint8_t *pkt, int pkt_len) arp_input(slirp, pkt, pkt_len); break; case ETH_P_IP: + case ETH_P_IPV6: m = m_get(slirp); if (!m) return; - /* Note: we add to align the IP header */ - if (M_FREEROOM(m) < pkt_len + 2) { - m_inc(m, pkt_len + 2); + /* Note: we add 2 to align the IP header on 4 bytes, + * and add the margin for the tcpiphdr overhead */ + if (M_FREEROOM(m) < pkt_len + TCPIPHDR_DELTA + 2) { + m_inc(m, pkt_len + TCPIPHDR_DELTA + 2); } - m->m_len = pkt_len + 2; - memcpy(m->m_data + 2, pkt, pkt_len); + m->m_len = pkt_len + TCPIPHDR_DELTA + 2; + memcpy(m->m_data + TCPIPHDR_DELTA + 2, pkt, pkt_len); - m->m_data += 2 + ETH_HLEN; - m->m_len -= 2 + ETH_HLEN; + m->m_data += TCPIPHDR_DELTA + 2 + ETH_HLEN; + m->m_len -= TCPIPHDR_DELTA + 2 + ETH_HLEN; - ip_input(m); + if (proto == ETH_P_IP) { + ip_input(m); + } else if (proto == ETH_P_IPV6) { + ip6_input(m); + } break; + default: break; } @@ -826,6 +846,31 @@ static int if_encap4(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh, } } +/* Prepare the IPv6 packet to be sent to the ethernet device. Returns 1 if no + * packet should be sent, 0 if the packet must be re-queued, 2 if the packet + * is ready to go. + */ +static int if_encap6(Slirp *slirp, struct mbuf *ifm, struct ethhdr *eh, + uint8_t ethaddr[ETH_ALEN]) +{ + const struct ip6 *ip6h = mtod(ifm, const struct ip6 *); + if (!ndp_table_search(slirp, ip6h->ip_dst, ethaddr)) { + if (!ifm->resolution_requested) { + ndp_send_ns(slirp, ip6h->ip_dst); + ifm->resolution_requested = true; + ifm->expiration_date = + qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + 1000000000ULL; + } + return 0; + } else { + eh->h_proto = htons(ETH_P_IPV6); + in6_compute_ethaddr(ip6h->ip_src, eh->h_source); + + /* Send this */ + return 2; + } +} + /* Output the IP packet to the ethernet device. Returns 0 if the packet must be * re-queued. */ @@ -849,9 +894,15 @@ int if_encap(Slirp *slirp, struct mbuf *ifm) } break; + case IP6VERSION: + ret = if_encap6(slirp, ifm, eh, ethaddr); + if (ret < 2) { + return ret; + } + break; + default: - /* Do not assert while we don't manage IP6VERSION */ - /* assert(0); */ + g_assert_not_reached(); break; } diff --git a/slirp/slirp.h b/slirp/slirp.h index a6741e77b1..71f2439461 100644 --- a/slirp/slirp.h +++ b/slirp/slirp.h @@ -111,6 +111,8 @@ void free(void *ptr); #include <sys/stropts.h> #endif +#include <glib.h> + #include "debug.h" #include "qemu/queue.h" @@ -119,12 +121,14 @@ void free(void *ptr); #include "libslirp.h" #include "ip.h" +#include "ip6.h" #include "tcp.h" #include "tcp_timer.h" #include "tcp_var.h" #include "tcpip.h" #include "udp.h" #include "ip_icmp.h" +#include "ip6_icmp.h" #include "mbuf.h" #include "sbuf.h" #include "socket.h" @@ -176,6 +180,23 @@ void arp_table_add(Slirp *slirp, uint32_t ip_addr, uint8_t ethaddr[ETH_ALEN]); bool arp_table_search(Slirp *slirp, uint32_t ip_addr, uint8_t out_ethaddr[ETH_ALEN]); +struct ndpentry { + unsigned char eth_addr[ETH_ALEN]; /* sender hardware address */ + struct in6_addr ip_addr; /* sender IP address */ +} QEMU_PACKED; + +#define NDP_TABLE_SIZE 16 + +typedef struct NdpTable { + struct ndpentry table[NDP_TABLE_SIZE]; + int next_victim; +} NdpTable; + +void ndp_table_add(Slirp *slirp, struct in6_addr ip_addr, + uint8_t ethaddr[ETH_ALEN]); +bool ndp_table_search(Slirp *slirp, struct in6_addr ip_addr, + uint8_t out_ethaddr[ETH_ALEN]); + struct Slirp { QTAILQ_ENTRY(Slirp) entry; u_int time_fasttimo; @@ -186,8 +207,12 @@ struct Slirp { struct in_addr vnetwork_addr; struct in_addr vnetwork_mask; struct in_addr vhost_addr; + struct in6_addr vprefix_addr6; + uint8_t vprefix_len; + struct in6_addr vhost_addr6; struct in_addr vdhcp_startaddr; struct in_addr vnameserver_addr; + struct in6_addr vnameserver_addr6; struct in_addr client_ipaddr; char client_hostname[33]; @@ -234,6 +259,10 @@ struct Slirp { struct tftp_session tftp_sessions[TFTP_SESSIONS_MAX]; ArpTable arp_table; + NdpTable ndp_table; + + GRand *grand; + QEMUTimer *ra_timer; void *opaque; }; @@ -276,6 +305,7 @@ int translate_dnssearch(Slirp *s, const char ** names); /* cksum.c */ int cksum(struct mbuf *m, int len); +int ip6_cksum(struct mbuf *m); /* if.c */ void if_init(Slirp *); @@ -291,8 +321,16 @@ void ip_stripoptions(register struct mbuf *, struct mbuf *); /* ip_output.c */ int ip_output(struct socket *, struct mbuf *); +/* ip6_input.c */ +void ip6_init(Slirp *); +void ip6_cleanup(Slirp *); +void ip6_input(struct mbuf *); + +/* ip6_output */ +int ip6_output(struct socket *, struct mbuf *, int fast); + /* tcp_input.c */ -void tcp_input(register struct mbuf *, int, struct socket *); +void tcp_input(register struct mbuf *, int, struct socket *, unsigned short af); int tcp_mss(register struct tcpcb *, u_int); /* tcp_output.c */ @@ -303,7 +341,8 @@ void tcp_setpersist(register struct tcpcb *); void tcp_init(Slirp *); void tcp_cleanup(Slirp *); void tcp_template(struct tcpcb *); -void tcp_respond(struct tcpcb *, register struct tcpiphdr *, register struct mbuf *, tcp_seq, tcp_seq, int); +void tcp_respond(struct tcpcb *, register struct tcpiphdr *, + register struct mbuf *, tcp_seq, tcp_seq, int, unsigned short); struct tcpcb * tcp_newtcpcb(struct socket *); struct tcpcb * tcp_close(register struct tcpcb *); void tcp_sockclosed(struct tcpcb *); diff --git a/slirp/socket.c b/slirp/socket.c index 2b5453e020..b836c42b8e 100644 --- a/slirp/socket.c +++ b/slirp/socket.c @@ -463,7 +463,7 @@ sorecvfrom(struct socket *so) DEBUG_MISC((dfd," udp icmp rx errno = %d-%s\n", errno,strerror(errno))); - icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); + icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno)); } else { icmp_reflect(so->so_m); so->so_m = NULL; /* Don't m_free() it again! */ @@ -483,7 +483,18 @@ sorecvfrom(struct socket *so) if (!m) { return; } - m->m_data += IF_MAXLINKHDR; + switch (so->so_ffamily) { + case AF_INET: + m->m_data += IF_MAXLINKHDR + sizeof(struct udpiphdr); + break; + case AF_INET6: + m->m_data += IF_MAXLINKHDR + sizeof(struct ip6) + + sizeof(struct udphdr); + break; + default: + g_assert_not_reached(); + break; + } /* * XXX Shouldn't FIONREAD packets destined for port 53, @@ -505,13 +516,37 @@ sorecvfrom(struct socket *so) DEBUG_MISC((dfd, " did recvfrom %d, errno = %d-%s\n", m->m_len, errno,strerror(errno))); if(m->m_len<0) { - u_char code=ICMP_UNREACH_PORT; - - if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; - else if(errno == ENETUNREACH) code=ICMP_UNREACH_NET; - - DEBUG_MISC((dfd," rx error, tx icmp ICMP_UNREACH:%i\n", code)); - icmp_error(so->so_m, ICMP_UNREACH,code, 0,strerror(errno)); + /* Report error as ICMP */ + switch (so->so_lfamily) { + uint8_t code; + case AF_INET: + code = ICMP_UNREACH_PORT; + + if (errno == EHOSTUNREACH) { + code = ICMP_UNREACH_HOST; + } else if (errno == ENETUNREACH) { + code = ICMP_UNREACH_NET; + } + + DEBUG_MISC((dfd, " rx error, tx icmp ICMP_UNREACH:%i\n", code)); + icmp_send_error(so->so_m, ICMP_UNREACH, code, 0, strerror(errno)); + break; + case AF_INET6: + code = ICMP6_UNREACH_PORT; + + if (errno == EHOSTUNREACH) { + code = ICMP6_UNREACH_ADDRESS; + } else if (errno == ENETUNREACH) { + code = ICMP6_UNREACH_NO_ROUTE; + } + + DEBUG_MISC((dfd, " rx error, tx icmp6 ICMP_UNREACH:%i\n", code)); + icmp6_send_error(so->so_m, ICMP6_UNREACH, code); + break; + default: + g_assert_not_reached(); + break; + } m_free(m); } else { /* @@ -541,7 +576,12 @@ sorecvfrom(struct socket *so) (struct sockaddr_in *) &daddr, so->so_iptos); break; + case AF_INET6: + udp6_output(so, m, (struct sockaddr_in6 *) &saddr, + (struct sockaddr_in6 *) &daddr); + break; default: + g_assert_not_reached(); break; } } /* rx error */ @@ -731,6 +771,7 @@ void sotranslate_out(struct socket *so, struct sockaddr_storage *addr) { Slirp *slirp = so->slirp; struct sockaddr_in *sin = (struct sockaddr_in *)addr; + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; switch (addr->ss_family) { case AF_INET: @@ -751,6 +792,19 @@ void sotranslate_out(struct socket *so, struct sockaddr_storage *addr) ntohs(sin->sin_port), inet_ntoa(sin->sin_addr))); break; + case AF_INET6: + if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6, + slirp->vprefix_len)) { + if (in6_equal(&so->so_faddr6, &slirp->vnameserver_addr6)) { + /*if (get_dns_addr(&addr) < 0) {*/ /* TODO */ + sin6->sin6_addr = in6addr_loopback; + /*}*/ + } else { + sin6->sin6_addr = in6addr_loopback; + } + } + break; + default: break; } @@ -760,6 +814,7 @@ void sotranslate_in(struct socket *so, struct sockaddr_storage *addr) { Slirp *slirp = so->slirp; struct sockaddr_in *sin = (struct sockaddr_in *)addr; + struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr; switch (addr->ss_family) { case AF_INET: @@ -776,6 +831,16 @@ void sotranslate_in(struct socket *so, struct sockaddr_storage *addr) } break; + case AF_INET6: + if (in6_equal_net(&so->so_faddr6, &slirp->vprefix_addr6, + slirp->vprefix_len)) { + if (in6_equal(&sin6->sin6_addr, &in6addr_loopback) + || !in6_equal(&so->so_faddr6, &slirp->vhost_addr6)) { + sin6->sin6_addr = so->so_faddr6; + } + } + break; + default: break; } @@ -797,6 +862,13 @@ void sotranslate_accept(struct socket *so) } break; + case AF_INET6: + if (in6_equal(&so->so_faddr6, &in6addr_any) || + in6_equal(&so->so_faddr6, &in6addr_loopback)) { + so->so_faddr6 = slirp->vhost_addr6; + } + break; + default: break; } diff --git a/slirp/socket.h b/slirp/socket.h index c4afc9494f..e9c9b053dc 100644 --- a/slirp/socket.h +++ b/slirp/socket.h @@ -34,17 +34,23 @@ struct socket { union { /* foreign host */ struct sockaddr_storage ss; struct sockaddr_in sin; + struct sockaddr_in6 sin6; } fhost; #define so_faddr fhost.sin.sin_addr #define so_fport fhost.sin.sin_port +#define so_faddr6 fhost.sin6.sin6_addr +#define so_fport6 fhost.sin6.sin6_port #define so_ffamily fhost.ss.ss_family union { /* local host */ struct sockaddr_storage ss; struct sockaddr_in sin; + struct sockaddr_in6 sin6; } lhost; #define so_laddr lhost.sin.sin_addr #define so_lport lhost.sin.sin_port +#define so_laddr6 lhost.sin6.sin6_addr +#define so_lport6 lhost.sin6.sin6_port #define so_lfamily lhost.ss.ss_family uint8_t so_iptos; /* Type of service */ @@ -102,6 +108,13 @@ static inline int sockaddr_equal(struct sockaddr_storage *a, return a4->sin_addr.s_addr == b4->sin_addr.s_addr && a4->sin_port == b4->sin_port; } + case AF_INET6: + { + struct sockaddr_in6 *a6 = (struct sockaddr_in6 *) a; + struct sockaddr_in6 *b6 = (struct sockaddr_in6 *) b; + return (in6_equal(&a6->sin6_addr, &b6->sin6_addr) + && a6->sin6_port == b6->sin6_port); + } default: g_assert_not_reached(); } diff --git a/slirp/tcp.h b/slirp/tcp.h index 2e2b4033a6..61befcde57 100644 --- a/slirp/tcp.h +++ b/slirp/tcp.h @@ -106,6 +106,8 @@ struct tcphdr { */ #undef TCP_MSS #define TCP_MSS 1460 +#undef TCP6_MSS +#define TCP6_MSS 1440 #undef TCP_MAXWIN #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c index 03be56eaab..1fcca3040e 100644 --- a/slirp/tcp_input.c +++ b/slirp/tcp_input.c @@ -214,9 +214,10 @@ present: * protocol specification dated September, 1981 very closely. */ void -tcp_input(struct mbuf *m, int iphlen, struct socket *inso) +tcp_input(struct mbuf *m, int iphlen, struct socket *inso, unsigned short af) { - struct ip save_ip, *ip; + struct ip save_ip, *ip; + struct ip6 save_ip6, *ip6; register struct tcpiphdr *ti; caddr_t optp = NULL; int optlen = 0; @@ -230,6 +231,7 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso) int ret; struct sockaddr_storage lhost, fhost; struct sockaddr_in *lhost4, *fhost4; + struct sockaddr_in6 *lhost6, *fhost6; struct ex_list *ex_ptr; Slirp *slirp; @@ -256,37 +258,83 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso) } slirp = m->slirp; - /* - * Get IP and TCP header together in first mbuf. - * Note: IP leaves IP header in first mbuf. - */ - ti = mtod(m, struct tcpiphdr *); - if (iphlen > sizeof(struct ip )) { - ip_stripoptions(m, (struct mbuf *)0); - iphlen=sizeof(struct ip ); - } - /* XXX Check if too short */ + ip = mtod(m, struct ip *); + ip6 = mtod(m, struct ip6 *); + switch (af) { + case AF_INET: + if (iphlen > sizeof(struct ip)) { + ip_stripoptions(m, (struct mbuf *)0); + iphlen = sizeof(struct ip); + } + /* XXX Check if too short */ - /* - * Save a copy of the IP header in case we want restore it - * for sending an ICMP error message in response. - */ - ip=mtod(m, struct ip *); - save_ip = *ip; - save_ip.ip_len+= iphlen; - /* - * Checksum extended TCP header and data. - */ - tlen = ((struct ip *)ti)->ip_len; - tcpiphdr2qlink(ti)->next = tcpiphdr2qlink(ti)->prev = NULL; - memset(&ti->ti_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr)); - ti->ti_x1 = 0; - ti->ti_len = htons((uint16_t)tlen); - len = sizeof(struct ip ) + tlen; - if(cksum(m, len)) { - goto drop; + /* + * Save a copy of the IP header in case we want restore it + * for sending an ICMP error message in response. + */ + save_ip = *ip; + save_ip.ip_len += iphlen; + + /* + * Get IP and TCP header together in first mbuf. + * Note: IP leaves IP header in first mbuf. + */ + m->m_data -= sizeof(struct tcpiphdr) - sizeof(struct ip) + - sizeof(struct tcphdr); + m->m_len += sizeof(struct tcpiphdr) - sizeof(struct ip) + - sizeof(struct tcphdr); + ti = mtod(m, struct tcpiphdr *); + + /* + * Checksum extended TCP header and data. + */ + tlen = ip->ip_len; + tcpiphdr2qlink(ti)->next = tcpiphdr2qlink(ti)->prev = NULL; + memset(&ti->ih_mbuf, 0 , sizeof(struct mbuf_ptr)); + memset(&ti->ti, 0, sizeof(ti->ti)); + ti->ti_x0 = 0; + ti->ti_src = save_ip.ip_src; + ti->ti_dst = save_ip.ip_dst; + ti->ti_pr = save_ip.ip_p; + ti->ti_len = htons((uint16_t)tlen); + break; + + case AF_INET6: + /* + * Save a copy of the IP header in case we want restore it + * for sending an ICMP error message in response. + */ + save_ip6 = *ip6; + /* + * Get IP and TCP header together in first mbuf. + * Note: IP leaves IP header in first mbuf. + */ + m->m_data -= sizeof(struct tcpiphdr) - (sizeof(struct ip6) + + sizeof(struct tcphdr)); + m->m_len += sizeof(struct tcpiphdr) - (sizeof(struct ip6) + + sizeof(struct tcphdr)); + ti = mtod(m, struct tcpiphdr *); + + tlen = ip6->ip_pl; + tcpiphdr2qlink(ti)->next = tcpiphdr2qlink(ti)->prev = NULL; + memset(&ti->ih_mbuf, 0 , sizeof(struct mbuf_ptr)); + memset(&ti->ti, 0, sizeof(ti->ti)); + ti->ti_x0 = 0; + ti->ti_src6 = save_ip6.ip_src; + ti->ti_dst6 = save_ip6.ip_dst; + ti->ti_nh6 = save_ip6.ip_nh; + ti->ti_len = htons((uint16_t)tlen); + break; + + default: + g_assert_not_reached(); + } + + len = ((sizeof(struct tcpiphdr) - sizeof(struct tcphdr)) + tlen); + if (cksum(m, len)) { + goto drop; } /* @@ -323,14 +371,28 @@ tcp_input(struct mbuf *m, int iphlen, struct socket *inso) * Locate pcb for segment. */ findso: - lhost.ss_family = AF_INET; - lhost4 = (struct sockaddr_in *) &lhost; - lhost4->sin_addr = ti->ti_src; - lhost4->sin_port = ti->ti_sport; - fhost.ss_family = AF_INET; - fhost4 = (struct sockaddr_in *) &fhost; - fhost4->sin_addr = ti->ti_dst; - fhost4->sin_port = ti->ti_dport; + lhost.ss_family = af; + fhost.ss_family = af; + switch (af) { + case AF_INET: + lhost4 = (struct sockaddr_in *) &lhost; + lhost4->sin_addr = ti->ti_src; + lhost4->sin_port = ti->ti_sport; + fhost4 = (struct sockaddr_in *) &fhost; + fhost4->sin_addr = ti->ti_dst; + fhost4->sin_port = ti->ti_dport; + break; + case AF_INET6: + lhost6 = (struct sockaddr_in6 *) &lhost; + lhost6->sin6_addr = ti->ti_src6; + lhost6->sin6_port = ti->ti_sport; + fhost6 = (struct sockaddr_in6 *) &fhost; + fhost6->sin6_addr = ti->ti_dst6; + fhost6->sin6_port = ti->ti_dport; + break; + default: + g_assert_not_reached(); + } so = solookup(&slirp->tcp_last_so, &slirp->tcb, &lhost, &fhost); @@ -380,8 +442,18 @@ findso: so->lhost.ss = lhost; so->fhost.ss = fhost; - if ((so->so_iptos = tcp_tos(so)) == 0) - so->so_iptos = ((struct ip *)ti)->ip_tos; + so->so_iptos = tcp_tos(so); + if (so->so_iptos == 0) { + switch (af) { + case AF_INET: + so->so_iptos = ((struct ip *)ti)->ip_tos; + break; + case AF_INET6: + break; + default: + g_assert_not_reached(); + } + } tp = sototcpcb(so); tp->t_state = TCPS_LISTEN; @@ -560,8 +632,9 @@ findso: * If this is destined for the control address, then flag to * tcp_ctl once connected, otherwise connect */ - if ((so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == - slirp->vnetwork_addr.s_addr) { + if (af == AF_INET && + (so->so_faddr.s_addr & slirp->vnetwork_mask.s_addr) == + slirp->vnetwork_addr.s_addr) { if (so->so_faddr.s_addr != slirp->vhost_addr.s_addr && so->so_faddr.s_addr != slirp->vnameserver_addr.s_addr) { /* May be an add exec */ @@ -588,23 +661,56 @@ findso: if ((tcp_fconnect(so, so->so_ffamily) == -1) && (errno != EINPROGRESS) && (errno != EWOULDBLOCK) ) { - u_char code=ICMP_UNREACH_NET; + uint8_t code; DEBUG_MISC((dfd, " tcp fconnect errno = %d-%s\n", errno,strerror(errno))); if(errno == ECONNREFUSED) { /* ACK the SYN, send RST to refuse the connection */ - tcp_respond(tp, ti, m, ti->ti_seq+1, (tcp_seq)0, - TH_RST|TH_ACK); + tcp_respond(tp, ti, m, ti->ti_seq + 1, (tcp_seq) 0, + TH_RST | TH_ACK, af); } else { - if(errno == EHOSTUNREACH) code=ICMP_UNREACH_HOST; + switch (af) { + case AF_INET: + code = ICMP_UNREACH_NET; + if (errno == EHOSTUNREACH) { + code = ICMP_UNREACH_HOST; + } + break; + case AF_INET6: + code = ICMP6_UNREACH_NO_ROUTE; + if (errno == EHOSTUNREACH) { + code = ICMP6_UNREACH_ADDRESS; + } + break; + default: + g_assert_not_reached(); + } HTONL(ti->ti_seq); /* restore tcp header */ HTONL(ti->ti_ack); HTONS(ti->ti_win); HTONS(ti->ti_urp); m->m_data -= sizeof(struct tcpiphdr)+off-sizeof(struct tcphdr); m->m_len += sizeof(struct tcpiphdr)+off-sizeof(struct tcphdr); - *ip=save_ip; - icmp_error(m, ICMP_UNREACH,code, 0,strerror(errno)); + switch (af) { + case AF_INET: + m->m_data += sizeof(struct tcpiphdr) - sizeof(struct ip) + - sizeof(struct tcphdr); + m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct ip) + - sizeof(struct tcphdr); + *ip = save_ip; + icmp_send_error(m, ICMP_UNREACH, code, 0, strerror(errno)); + break; + case AF_INET6: + m->m_data += sizeof(struct tcpiphdr) - (sizeof(struct ip6) + + sizeof(struct tcphdr)); + m->m_len -= sizeof(struct tcpiphdr) - (sizeof(struct ip6) + + sizeof(struct tcphdr)); + *ip6 = save_ip6; + icmp6_send_error(m, ICMP6_UNREACH, code); + break; + default: + g_assert_not_reached(); + } } tcp_close(tp); m_free(m); @@ -1276,11 +1382,11 @@ dropafterack: dropwithreset: /* reuses m if m!=NULL, m_free() unnecessary */ if (tiflags & TH_ACK) - tcp_respond(tp, ti, m, (tcp_seq)0, ti->ti_ack, TH_RST); + tcp_respond(tp, ti, m, (tcp_seq)0, ti->ti_ack, TH_RST, af); else { if (tiflags & TH_SYN) ti->ti_len++; - tcp_respond(tp, ti, m, ti->ti_seq+ti->ti_len, (tcp_seq)0, - TH_RST|TH_ACK); + tcp_respond(tp, ti, m, ti->ti_seq + ti->ti_len, (tcp_seq) 0, + TH_RST | TH_ACK, af); } return; @@ -1471,7 +1577,19 @@ tcp_mss(struct tcpcb *tp, u_int offer) DEBUG_ARG("tp = %p", tp); DEBUG_ARG("offer = %d", offer); - mss = min(IF_MTU, IF_MRU) - sizeof(struct tcpiphdr); + switch (so->so_ffamily) { + case AF_INET: + mss = min(IF_MTU, IF_MRU) - sizeof(struct tcphdr) + + sizeof(struct ip); + break; + case AF_INET6: + mss = min(IF_MTU, IF_MRU) - sizeof(struct tcphdr) + + sizeof(struct ip6); + break; + default: + g_assert_not_reached(); + } + if (offer) mss = min(mss, offer); mss = max(mss, 32); diff --git a/slirp/tcp_output.c b/slirp/tcp_output.c index 34e4d2e5d4..99b0a9b1cb 100644 --- a/slirp/tcp_output.c +++ b/slirp/tcp_output.c @@ -61,7 +61,9 @@ tcp_output(struct tcpcb *tp) register long len, win; int off, flags, error; register struct mbuf *m; - register struct tcpiphdr *ti; + register struct tcpiphdr *ti, tcpiph_save; + struct ip *ip; + struct ip6 *ip6; u_char opt[MAX_TCPOPTLEN]; unsigned optlen, hdrlen; int idle, sendalot; @@ -447,16 +449,45 @@ send: * the template, but need a way to checksum without them. */ m->m_len = hdrlen + len; /* XXX Needed? m_len should be correct */ + tcpiph_save = *mtod(m, struct tcpiphdr *); + + switch (so->so_ffamily) { + case AF_INET: + m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip); + m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip); + ip = mtod(m, struct ip *); + + ip->ip_len = m->m_len; + ip->ip_dst = tcpiph_save.ti_dst; + ip->ip_src = tcpiph_save.ti_src; + ip->ip_p = tcpiph_save.ti_pr; + + ip->ip_ttl = IPDEFTTL; + ip->ip_tos = so->so_iptos; + error = ip_output(so, m); + break; + + case AF_INET6: + m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip6); + m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip6); + ip6 = mtod(m, struct ip6 *); + + ip6->ip_pl = tcpiph_save.ti_len; + ip6->ip_dst = tcpiph_save.ti_dst6; + ip6->ip_src = tcpiph_save.ti_src6; + ip6->ip_nh = tcpiph_save.ti_nh6; + + error = ip6_output(so, m, 0); + break; + + default: + g_assert_not_reached(); + } - { - - ((struct ip *)ti)->ip_len = m->m_len; - - ((struct ip *)ti)->ip_ttl = IPDEFTTL; - ((struct ip *)ti)->ip_tos = so->so_iptos; - - error = ip_output(so, m); - } if (error) { out: return (error); diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c index b1aa1f23f4..dbfd2c673b 100644 --- a/slirp/tcp_subr.c +++ b/slirp/tcp_subr.c @@ -76,13 +76,30 @@ tcp_template(struct tcpcb *tp) register struct tcpiphdr *n = &tp->t_template; n->ti_mbuf = NULL; - n->ti_x1 = 0; - n->ti_pr = IPPROTO_TCP; - n->ti_len = htons(sizeof (struct tcpiphdr) - sizeof (struct ip)); - n->ti_src = so->so_faddr; - n->ti_dst = so->so_laddr; - n->ti_sport = so->so_fport; - n->ti_dport = so->so_lport; + memset(&n->ti, 0, sizeof(n->ti)); + n->ti_x0 = 0; + switch (so->so_ffamily) { + case AF_INET: + n->ti_pr = IPPROTO_TCP; + n->ti_len = htons(sizeof(struct tcphdr)); + n->ti_src = so->so_faddr; + n->ti_dst = so->so_laddr; + n->ti_sport = so->so_fport; + n->ti_dport = so->so_lport; + break; + + case AF_INET6: + n->ti_nh6 = IPPROTO_TCP; + n->ti_len = htons(sizeof(struct tcphdr)); + n->ti_src6 = so->so_faddr6; + n->ti_dst6 = so->so_laddr6; + n->ti_sport = so->so_fport6; + n->ti_dport = so->so_lport6; + break; + + default: + g_assert_not_reached(); + } n->ti_seq = 0; n->ti_ack = 0; @@ -109,7 +126,7 @@ tcp_template(struct tcpcb *tp) */ void tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, - tcp_seq ack, tcp_seq seq, int flags) + tcp_seq ack, tcp_seq seq, int flags, unsigned short af) { register int tlen; int win = 0; @@ -131,6 +148,7 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, m->m_data += IF_MAXLINKHDR; *mtod(m, struct tcpiphdr *) = *ti; ti = mtod(m, struct tcpiphdr *); + memset(&ti->ti, 0, sizeof(ti->ti)); flags = TH_ACK; } else { /* @@ -142,16 +160,26 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, m->m_len = sizeof (struct tcpiphdr); tlen = 0; #define xchg(a,b,type) { type t; t=a; a=b; b=t; } - xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, uint32_t); - xchg(ti->ti_dport, ti->ti_sport, uint16_t); + switch (af) { + case AF_INET: + xchg(ti->ti_dst.s_addr, ti->ti_src.s_addr, uint32_t); + xchg(ti->ti_dport, ti->ti_sport, uint16_t); + break; + case AF_INET6: + xchg(ti->ti_dst6, ti->ti_src6, struct in6_addr); + xchg(ti->ti_dport, ti->ti_sport, uint16_t); + break; + default: + g_assert_not_reached(); + } #undef xchg } ti->ti_len = htons((u_short)(sizeof (struct tcphdr) + tlen)); tlen += sizeof (struct tcpiphdr); m->m_len = tlen; - ti->ti_mbuf = NULL; - ti->ti_x1 = 0; + ti->ti_mbuf = NULL; + ti->ti_x0 = 0; ti->ti_seq = htonl(seq); ti->ti_ack = htonl(ack); ti->ti_x2 = 0; @@ -164,14 +192,49 @@ tcp_respond(struct tcpcb *tp, struct tcpiphdr *ti, struct mbuf *m, ti->ti_urp = 0; ti->ti_sum = 0; ti->ti_sum = cksum(m, tlen); - ((struct ip *)ti)->ip_len = tlen; - - if(flags & TH_RST) - ((struct ip *)ti)->ip_ttl = MAXTTL; - else - ((struct ip *)ti)->ip_ttl = IPDEFTTL; - (void) ip_output((struct socket *)0, m); + struct tcpiphdr tcpiph_save = *(mtod(m, struct tcpiphdr *)); + struct ip *ip; + struct ip6 *ip6; + + switch (af) { + case AF_INET: + m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip); + m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip); + ip = mtod(m, struct ip *); + ip->ip_len = tlen; + ip->ip_dst = tcpiph_save.ti_dst; + ip->ip_src = tcpiph_save.ti_src; + ip->ip_p = tcpiph_save.ti_pr; + + if (flags & TH_RST) { + ip->ip_ttl = MAXTTL; + } else { + ip->ip_ttl = IPDEFTTL; + } + + ip_output(NULL, m); + break; + + case AF_INET6: + m->m_data += sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip6); + m->m_len -= sizeof(struct tcpiphdr) - sizeof(struct tcphdr) + - sizeof(struct ip6); + ip6 = mtod(m, struct ip6 *); + ip6->ip_pl = tlen; + ip6->ip_dst = tcpiph_save.ti_dst6; + ip6->ip_src = tcpiph_save.ti_src6; + ip6->ip_nh = tcpiph_save.ti_nh6; + + ip6_output(NULL, m, 0); + break; + + default: + g_assert_not_reached(); + } } /* @@ -190,7 +253,7 @@ tcp_newtcpcb(struct socket *so) memset((char *) tp, 0, sizeof(struct tcpcb)); tp->seg_next = tp->seg_prev = (struct tcpiphdr*)tp; - tp->t_maxseg = TCP_MSS; + tp->t_maxseg = (so->so_ffamily == AF_INET) ? TCP_MSS : TCP6_MSS; tp->t_flags = TCP_DO_RFC1323 ? (TF_REQ_SCALE|TF_REQ_TSTMP) : 0; tp->t_socket = so; @@ -375,8 +438,8 @@ void tcp_connect(struct socket *inso) { Slirp *slirp = inso->slirp; struct socket *so; - struct sockaddr_in addr; - socklen_t addrlen = sizeof(struct sockaddr_in); + struct sockaddr_storage addr; + socklen_t addrlen = sizeof(struct sockaddr_storage); struct tcpcb *tp; int s, opt; @@ -401,9 +464,8 @@ void tcp_connect(struct socket *inso) free(so); /* NOT sofree */ return; } - so->so_lfamily = AF_INET; - so->so_laddr = inso->so_laddr; - so->so_lport = inso->so_lport; + so->lhost = inso->lhost; + so->so_ffamily = inso->so_ffamily; } tcp_mss(sototcpcb(so), 0); @@ -419,7 +481,7 @@ void tcp_connect(struct socket *inso) qemu_setsockopt(s, SOL_SOCKET, SO_OOBINLINE, &opt, sizeof(int)); socket_set_nodelay(s); - so->fhost.sin = addr; + so->fhost.ss = addr; sotranslate_accept(so); /* Close the accept() socket, set right state */ diff --git a/slirp/tcp_timer.c b/slirp/tcp_timer.c index 1214c2e6fa..8f5dd772ad 100644 --- a/slirp/tcp_timer.c +++ b/slirp/tcp_timer.c @@ -278,7 +278,8 @@ tcp_timers(register struct tcpcb *tp, int timer) * correspondent TCP to respond. */ tcp_respond(tp, &tp->t_template, (struct mbuf *)NULL, - tp->rcv_nxt, tp->snd_una - 1, 0); + tp->rcv_nxt, tp->snd_una - 1, 0, + tp->t_socket->so_ffamily); tp->t_timer[TCPT_KEEP] = TCPTV_KEEPINTVL; } else tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_IDLE; diff --git a/slirp/tcpip.h b/slirp/tcpip.h index 7974ce3d52..124b4a9f62 100644 --- a/slirp/tcpip.h +++ b/slirp/tcpip.h @@ -37,15 +37,32 @@ * Tcp+ip header, after ip options removed. */ struct tcpiphdr { - struct ipovly ti_i; /* overlaid ip structure */ - struct tcphdr ti_t; /* tcp header */ + struct mbuf_ptr ih_mbuf; /* backpointer to mbuf */ + union { + struct { + struct in_addr ih_src; /* source internet address */ + struct in_addr ih_dst; /* destination internet address */ + uint8_t ih_x1; /* (unused) */ + uint8_t ih_pr; /* protocol */ + } ti_i4; + struct { + struct in6_addr ih_src; + struct in6_addr ih_dst; + uint8_t ih_x1; + uint8_t ih_nh; + } ti_i6; + } ti; + uint16_t ti_x0; + uint16_t ti_len; /* protocol length */ + struct tcphdr ti_t; /* tcp header */ }; -#define ti_mbuf ti_i.ih_mbuf.mptr -#define ti_x1 ti_i.ih_x1 -#define ti_pr ti_i.ih_pr -#define ti_len ti_i.ih_len -#define ti_src ti_i.ih_src -#define ti_dst ti_i.ih_dst +#define ti_mbuf ih_mbuf.mptr +#define ti_pr ti.ti_i4.ih_pr +#define ti_src ti.ti_i4.ih_src +#define ti_dst ti.ti_i4.ih_dst +#define ti_src6 ti.ti_i6.ih_src +#define ti_dst6 ti.ti_i6.ih_dst +#define ti_nh6 ti.ti_i6.ih_nh #define ti_sport ti_t.th_sport #define ti_dport ti_t.th_dport #define ti_seq ti_t.th_seq @@ -65,6 +82,13 @@ struct tcpiphdr { #define tcpfrag_list_end(F, T) (tcpiphdr2qlink(F) == (struct qlink*)(T)) #define tcpfrag_list_empty(T) ((T)->seg_next == (struct tcpiphdr*)(T)) +/* This is the difference between the size of a tcpiphdr structure, and the + * size of actual ip+tcp headers, rounded up since we need to align data. */ +#define TCPIPHDR_DELTA\ + (max(0,\ + (sizeof(struct tcpiphdr)\ + - sizeof(struct ip) - sizeof(struct tcphdr) + 3) & ~3)) + /* * Just a clean way to get to the first byte * of the packet diff --git a/slirp/tftp.c b/slirp/tftp.c index abb010621c..25ad6efdf8 100644 --- a/slirp/tftp.c +++ b/slirp/tftp.c @@ -46,7 +46,8 @@ static void tftp_session_terminate(struct tftp_session *spt) spt->slirp = NULL; } -static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) +static int tftp_session_allocate(Slirp *slirp, struct sockaddr_storage *srcsas, + struct tftp_t *tp) { struct tftp_session *spt; int k; @@ -68,7 +69,7 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) found: memset(spt, 0, sizeof(*spt)); - memcpy(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip)); + spt->client_addr = *srcsas; spt->fd = -1; spt->client_port = tp->udp.uh_sport; spt->slirp = slirp; @@ -78,7 +79,8 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) return k; } -static int tftp_session_find(Slirp *slirp, struct tftp_t *tp) +static int tftp_session_find(Slirp *slirp, struct sockaddr_storage *srcsas, + struct tftp_t *tp) { struct tftp_session *spt; int k; @@ -87,7 +89,7 @@ static int tftp_session_find(Slirp *slirp, struct tftp_t *tp) spt = &slirp->tftp_sessions[k]; if (tftp_session_in_use(spt)) { - if (!memcmp(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip))) { + if (sockaddr_equal(&spt->client_addr, srcsas)) { if (spt->client_port == tp->udp.uh_sport) { return k; } @@ -120,11 +122,53 @@ static int tftp_read_data(struct tftp_session *spt, uint32_t block_nr, return bytes_read; } +static struct tftp_t *tftp_prep_mbuf_data(struct tftp_session *spt, + struct mbuf *m) +{ + struct tftp_t *tp; + + memset(m->m_data, 0, m->m_size); + + m->m_data += IF_MAXLINKHDR; + if (spt->client_addr.ss_family == AF_INET6) { + m->m_data += sizeof(struct ip6); + } else { + m->m_data += sizeof(struct ip); + } + tp = (void *)m->m_data; + m->m_data += sizeof(struct udphdr); + + return tp; +} + +static void tftp_udp_output(struct tftp_session *spt, struct mbuf *m, + struct tftp_t *recv_tp) +{ + if (spt->client_addr.ss_family == AF_INET6) { + struct sockaddr_in6 sa6, da6; + + sa6.sin6_addr = spt->slirp->vhost_addr6; + sa6.sin6_port = recv_tp->udp.uh_dport; + da6.sin6_addr = ((struct sockaddr_in6 *)&spt->client_addr)->sin6_addr; + da6.sin6_port = spt->client_port; + + udp6_output(NULL, m, &sa6, &da6); + } else { + struct sockaddr_in sa4, da4; + + sa4.sin_addr = spt->slirp->vhost_addr; + sa4.sin_port = recv_tp->udp.uh_dport; + da4.sin_addr = ((struct sockaddr_in *)&spt->client_addr)->sin_addr; + da4.sin_port = spt->client_port; + + udp_output(NULL, m, &sa4, &da4, IPTOS_LOWDELAY); + } +} + static int tftp_send_oack(struct tftp_session *spt, const char *keys[], uint32_t values[], int nb, struct tftp_t *recv_tp) { - struct sockaddr_in saddr, daddr; struct mbuf *m; struct tftp_t *tp; int i, n = 0; @@ -132,13 +176,9 @@ static int tftp_send_oack(struct tftp_session *spt, m = m_get(spt->slirp); if (!m) - return -1; - - memset(m->m_data, 0, m->m_size); + return -1; - m->m_data += IF_MAXLINKHDR; - tp = (void *)m->m_data; - m->m_data += sizeof(struct udpiphdr); + tp = tftp_prep_mbuf_data(spt, m); tp->tp_op = htons(TFTP_OACK); for (i = 0; i < nb; i++) { @@ -148,15 +188,8 @@ static int tftp_send_oack(struct tftp_session *spt, values[i]) + 1; } - saddr.sin_addr = recv_tp->ip.ip_dst; - saddr.sin_port = recv_tp->udp.uh_dport; - - daddr.sin_addr = spt->client_ip; - daddr.sin_port = spt->client_port; - - m->m_len = sizeof(struct tftp_t) - 514 + n - - sizeof(struct ip) - sizeof(struct udphdr); - udp_output(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); + m->m_len = sizeof(struct tftp_t) - 514 + n - sizeof(struct udphdr); + tftp_udp_output(spt, m, recv_tp); return 0; } @@ -165,7 +198,6 @@ static void tftp_send_error(struct tftp_session *spt, uint16_t errorcode, const char *msg, struct tftp_t *recv_tp) { - struct sockaddr_in saddr, daddr; struct mbuf *m; struct tftp_t *tp; @@ -177,24 +209,15 @@ static void tftp_send_error(struct tftp_session *spt, memset(m->m_data, 0, m->m_size); - m->m_data += IF_MAXLINKHDR; - tp = (void *)m->m_data; - m->m_data += sizeof(struct udpiphdr); + tp = tftp_prep_mbuf_data(spt, m); tp->tp_op = htons(TFTP_ERROR); tp->x.tp_error.tp_error_code = htons(errorcode); pstrcpy((char *)tp->x.tp_error.tp_msg, sizeof(tp->x.tp_error.tp_msg), msg); - saddr.sin_addr = recv_tp->ip.ip_dst; - saddr.sin_port = recv_tp->udp.uh_dport; - - daddr.sin_addr = spt->client_ip; - daddr.sin_port = spt->client_port; - - m->m_len = sizeof(struct tftp_t) - 514 + 3 + strlen(msg) - - sizeof(struct ip) - sizeof(struct udphdr); - - udp_output(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); + m->m_len = sizeof(struct tftp_t) - 514 + 3 + strlen(msg) + - sizeof(struct udphdr); + tftp_udp_output(spt, m, recv_tp); out: tftp_session_terminate(spt); @@ -203,7 +226,6 @@ out: static void tftp_send_next_block(struct tftp_session *spt, struct tftp_t *recv_tp) { - struct sockaddr_in saddr, daddr; struct mbuf *m; struct tftp_t *tp; int nobytes; @@ -216,19 +238,11 @@ static void tftp_send_next_block(struct tftp_session *spt, memset(m->m_data, 0, m->m_size); - m->m_data += IF_MAXLINKHDR; - tp = (void *)m->m_data; - m->m_data += sizeof(struct udpiphdr); + tp = tftp_prep_mbuf_data(spt, m); tp->tp_op = htons(TFTP_DATA); tp->x.tp_data.tp_block_nr = htons((spt->block_nr + 1) & 0xffff); - saddr.sin_addr = recv_tp->ip.ip_dst; - saddr.sin_port = recv_tp->udp.uh_dport; - - daddr.sin_addr = spt->client_ip; - daddr.sin_port = spt->client_port; - nobytes = tftp_read_data(spt, spt->block_nr, tp->x.tp_data.tp_buf, 512); if (nobytes < 0) { @@ -241,10 +255,8 @@ static void tftp_send_next_block(struct tftp_session *spt, return; } - m->m_len = sizeof(struct tftp_t) - (512 - nobytes) - - sizeof(struct ip) - sizeof(struct udphdr); - - udp_output(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY); + m->m_len = sizeof(struct tftp_t) - (512 - nobytes) - sizeof(struct udphdr); + tftp_udp_output(spt, m, recv_tp); if (nobytes == 512) { tftp_session_update(spt); @@ -256,7 +268,8 @@ static void tftp_send_next_block(struct tftp_session *spt, spt->block_nr++; } -static void tftp_handle_rrq(Slirp *slirp, struct tftp_t *tp, int pktlen) +static void tftp_handle_rrq(Slirp *slirp, struct sockaddr_storage *srcsas, + struct tftp_t *tp, int pktlen) { struct tftp_session *spt; int s, k; @@ -267,12 +280,12 @@ static void tftp_handle_rrq(Slirp *slirp, struct tftp_t *tp, int pktlen) int nb_options = 0; /* check if a session already exists and if so terminate it */ - s = tftp_session_find(slirp, tp); + s = tftp_session_find(slirp, srcsas, tp); if (s >= 0) { tftp_session_terminate(&slirp->tftp_sessions[s]); } - s = tftp_session_allocate(slirp, tp); + s = tftp_session_allocate(slirp, srcsas, tp); if (s < 0) { return; @@ -397,11 +410,12 @@ static void tftp_handle_rrq(Slirp *slirp, struct tftp_t *tp, int pktlen) tftp_send_next_block(spt, tp); } -static void tftp_handle_ack(Slirp *slirp, struct tftp_t *tp, int pktlen) +static void tftp_handle_ack(Slirp *slirp, struct sockaddr_storage *srcsas, + struct tftp_t *tp, int pktlen) { int s; - s = tftp_session_find(slirp, tp); + s = tftp_session_find(slirp, srcsas, tp); if (s < 0) { return; @@ -410,11 +424,12 @@ static void tftp_handle_ack(Slirp *slirp, struct tftp_t *tp, int pktlen) tftp_send_next_block(&slirp->tftp_sessions[s], tp); } -static void tftp_handle_error(Slirp *slirp, struct tftp_t *tp, int pktlen) +static void tftp_handle_error(Slirp *slirp, struct sockaddr_storage *srcsas, + struct tftp_t *tp, int pktlen) { int s; - s = tftp_session_find(slirp, tp); + s = tftp_session_find(slirp, srcsas, tp); if (s < 0) { return; @@ -423,21 +438,21 @@ static void tftp_handle_error(Slirp *slirp, struct tftp_t *tp, int pktlen) tftp_session_terminate(&slirp->tftp_sessions[s]); } -void tftp_input(struct mbuf *m) +void tftp_input(struct sockaddr_storage *srcsas, struct mbuf *m) { struct tftp_t *tp = (struct tftp_t *)m->m_data; switch(ntohs(tp->tp_op)) { case TFTP_RRQ: - tftp_handle_rrq(m->slirp, tp, m->m_len); + tftp_handle_rrq(m->slirp, srcsas, tp, m->m_len); break; case TFTP_ACK: - tftp_handle_ack(m->slirp, tp, m->m_len); + tftp_handle_ack(m->slirp, srcsas, tp, m->m_len); break; case TFTP_ERROR: - tftp_handle_error(m->slirp, tp, m->m_len); + tftp_handle_error(m->slirp, srcsas, tp, m->m_len); break; } } diff --git a/slirp/tftp.h b/slirp/tftp.h index e1cc24b9bf..1cb1adf591 100644 --- a/slirp/tftp.h +++ b/slirp/tftp.h @@ -16,7 +16,6 @@ #define TFTP_FILENAME_MAX 512 struct tftp_t { - struct ip ip; struct udphdr udp; uint16_t tp_op; union { @@ -30,20 +29,20 @@ struct tftp_t { } tp_error; char tp_buf[512 + 2]; } x; -}; +} __attribute__((packed)); struct tftp_session { Slirp *slirp; char *filename; int fd; - struct in_addr client_ip; + struct sockaddr_storage client_addr; uint16_t client_port; uint32_t block_nr; int timestamp; }; -void tftp_input(struct mbuf *m); +void tftp_input(struct sockaddr_storage *srcsas, struct mbuf *m); #endif diff --git a/slirp/udp.c b/slirp/udp.c index 6b39cab0c6..247024fd86 100644 --- a/slirp/udp.c +++ b/slirp/udp.c @@ -128,6 +128,11 @@ udp_input(register struct mbuf *m, int iphlen) } } + lhost.ss_family = AF_INET; + lhost4 = (struct sockaddr_in *) &lhost; + lhost4->sin_addr = ip->ip_src; + lhost4->sin_port = uh->uh_sport; + /* * handle DHCP/BOOTP */ @@ -143,7 +148,11 @@ udp_input(register struct mbuf *m, int iphlen) */ if (ntohs(uh->uh_dport) == TFTP_SERVER && ip->ip_dst.s_addr == slirp->vhost_addr.s_addr) { - tftp_input(m); + m->m_data += iphlen; + m->m_len -= iphlen; + tftp_input(&lhost, m); + m->m_data -= iphlen; + m->m_len += iphlen; goto bad; } @@ -154,11 +163,6 @@ udp_input(register struct mbuf *m, int iphlen) /* * Locate pcb for datagram. */ - lhost.ss_family = AF_INET; - lhost4 = (struct sockaddr_in *) &lhost; - lhost4->sin_addr = ip->ip_src; - lhost4->sin_port = uh->uh_sport; - so = solookup(&slirp->udp_last_so, &slirp->udb, &lhost, NULL); if (so == NULL) { @@ -209,7 +213,8 @@ udp_input(register struct mbuf *m, int iphlen) m->m_data -= iphlen; *ip=save_ip; DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno))); - icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno)); + icmp_send_error(m, ICMP_UNREACH, ICMP_UNREACH_NET, 0, + strerror(errno)); goto bad; } diff --git a/slirp/udp.h b/slirp/udp.h index 2f9de3886c..10cc7809b1 100644 --- a/slirp/udp.h +++ b/slirp/udp.h @@ -83,4 +83,9 @@ struct socket * udp_listen(Slirp *, uint32_t, u_int, uint32_t, u_int, int udp_output(struct socket *so, struct mbuf *m, struct sockaddr_in *saddr, struct sockaddr_in *daddr, int iptos); + +void udp6_input(register struct mbuf *); +int udp6_output(struct socket *so, struct mbuf *m, + struct sockaddr_in6 *saddr, struct sockaddr_in6 *daddr); + #endif diff --git a/slirp/udp6.c b/slirp/udp6.c new file mode 100644 index 0000000000..60a91c9532 --- /dev/null +++ b/slirp/udp6.c @@ -0,0 +1,169 @@ +/* + * Copyright (c) 2013 + * Guillaume Subiron + */ + +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "slirp.h" +#include "qemu/osdep.h" +#include "udp.h" + +void udp6_input(struct mbuf *m) +{ + Slirp *slirp = m->slirp; + struct ip6 *ip, save_ip; + struct udphdr *uh; + int iphlen = sizeof(struct ip6); + int len; + struct socket *so; + struct sockaddr_in6 lhost; + + DEBUG_CALL("udp6_input"); + DEBUG_ARG("m = %lx", (long)m); + + if (slirp->restricted) { + goto bad; + } + + ip = mtod(m, struct ip6 *); + m->m_len -= iphlen; + m->m_data += iphlen; + uh = mtod(m, struct udphdr *); + m->m_len += iphlen; + m->m_data -= iphlen; + + if (ip6_cksum(m)) { + goto bad; + } + + len = ntohs((uint16_t)uh->uh_ulen); + + /* + * Make mbuf data length reflect UDP length. + * If not enough data to reflect UDP length, drop. + */ + if (ntohs(ip->ip_pl) != len) { + if (len > ntohs(ip->ip_pl)) { + goto bad; + } + m_adj(m, len - ntohs(ip->ip_pl)); + ip->ip_pl = htons(len); + } + + /* + * Save a copy of the IP header in case we want restore it + * for sending an ICMP error message in response. + */ + save_ip = *ip; + + /* Locate pcb for datagram. */ + lhost.sin6_family = AF_INET6; + lhost.sin6_addr = ip->ip_src; + lhost.sin6_port = uh->uh_sport; + + /* TODO handle DHCP/BOOTP */ + + /* handle TFTP */ + if (ntohs(uh->uh_dport) == TFTP_SERVER && + !memcmp(ip->ip_dst.s6_addr, slirp->vhost_addr6.s6_addr, 16)) { + m->m_data += iphlen; + m->m_len -= iphlen; + tftp_input((struct sockaddr_storage *)&lhost, m); + m->m_data -= iphlen; + m->m_len += iphlen; + goto bad; + } + + so = solookup(&slirp->udp_last_so, &slirp->udb, + (struct sockaddr_storage *) &lhost, NULL); + + if (so == NULL) { + /* If there's no socket for this packet, create one. */ + so = socreate(slirp); + if (!so) { + goto bad; + } + if (udp_attach(so, AF_INET6) == -1) { + DEBUG_MISC((dfd, " udp6_attach errno = %d-%s\n", + errno, strerror(errno))); + sofree(so); + goto bad; + } + + /* Setup fields */ + so->so_lfamily = AF_INET6; + so->so_laddr6 = ip->ip_src; + so->so_lport6 = uh->uh_sport; + } + + so->so_ffamily = AF_INET6; + so->so_faddr6 = ip->ip_dst; /* XXX */ + so->so_fport6 = uh->uh_dport; /* XXX */ + + iphlen += sizeof(struct udphdr); + m->m_len -= iphlen; + m->m_data += iphlen; + + /* + * Now we sendto() the packet. + */ + if (sosendto(so, m) == -1) { + m->m_len += iphlen; + m->m_data -= iphlen; + *ip = save_ip; + DEBUG_MISC((dfd, "udp tx errno = %d-%s\n", errno, strerror(errno))); + /* TODO: ICMPv6 error */ + /*icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));*/ + goto bad; + } + + m_free(so->so_m); /* used for ICMP if error on sorecvfrom */ + + /* restore the orig mbuf packet */ + m->m_len += iphlen; + m->m_data -= iphlen; + *ip = save_ip; + so->so_m = m; + + return; +bad: + m_free(m); +} + +int udp6_output(struct socket *so, struct mbuf *m, + struct sockaddr_in6 *saddr, struct sockaddr_in6 *daddr) +{ + struct ip6 *ip; + struct udphdr *uh; + + DEBUG_CALL("udp6_output"); + DEBUG_ARG("so = %lx", (long)so); + DEBUG_ARG("m = %lx", (long)m); + + /* adjust for header */ + m->m_data -= sizeof(struct udphdr); + m->m_len += sizeof(struct udphdr); + uh = mtod(m, struct udphdr *); + m->m_data -= sizeof(struct ip6); + m->m_len += sizeof(struct ip6); + ip = mtod(m, struct ip6 *); + + /* Build IP header */ + ip->ip_pl = htons(m->m_len - sizeof(struct ip6)); + ip->ip_nh = IPPROTO_UDP; + ip->ip_src = saddr->sin6_addr; + ip->ip_dst = daddr->sin6_addr; + + /* Build UDP header */ + uh->uh_sport = saddr->sin6_port; + uh->uh_dport = daddr->sin6_port; + uh->uh_ulen = ip->ip_pl; + uh->uh_sum = 0; + uh->uh_sum = ip6_cksum(m); + if (uh->uh_sum == 0) { + uh->uh_sum = 0xffff; + } + + return ip6_output(so, m, 0); +} |