From: <rob...@us...> - 2004-12-29 11:46:18
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Update of /cvsroot/gc-linux/ipl/lwip/core/ipv6 In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv24482 Added Files: README icmp6.c ip6.c ip6_addr.c Log Message: adding lwip/core/ipv6 --- NEW FILE: README --- IPv6 support in lwIP is very experimental. --- NEW FILE: icmp6.c --- /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <ad...@si...> * */ /* Some ICMP messages should be passed to the transport protocols. This is not implemented. */ #include "lwip/opt.h" #include "lwip/icmp.h" #include "lwip/inet.h" #include "lwip/ip.h" #include "lwip/def.h" #include "lwip/stats.h" void icmp_input(struct pbuf *p, struct netif *inp) { unsigned char type; struct icmp_echo_hdr *iecho; struct ip_hdr *iphdr; struct ip_addr tmpaddr; #ifdef ICMP_STATS ++lwip_stats.icmp.recv; #endif /* ICMP_STATS */ /* TODO: check length before accessing payload! */ type = ((char *)p->payload)[0]; switch (type) { case ICMP6_ECHO: LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n")); if (p->tot_len < sizeof(struct icmp_echo_hdr)) { LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n")); pbuf_free(p); #ifdef ICMP_STATS ++lwip_stats.icmp.lenerr; #endif /* ICMP_STATS */ return; } iecho = p->payload; iphdr = (struct ip_hdr *)((char *)p->payload - IP_HLEN); if (inet_chksum_pbuf(p) != 0) { LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%x)\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len))); #ifdef ICMP_STATS ++lwip_stats.icmp.chkerr; #endif /* ICMP_STATS */ /* return;*/ } LWIP_DEBUGF(ICMP_DEBUG, ("icmp: p->len %d p->tot_len %d\n", p->len, p->tot_len)); ip_addr_set(&tmpaddr, &(iphdr->src)); ip_addr_set(&(iphdr->src), &(iphdr->dest)); ip_addr_set(&(iphdr->dest), &tmpaddr); iecho->type = ICMP6_ER; /* adjust the checksum */ if (iecho->chksum >= htons(0xffff - (ICMP6_ECHO << 8))) { iecho->chksum += htons(ICMP6_ECHO << 8) + 1; } else { iecho->chksum += htons(ICMP6_ECHO << 8); } LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%x)\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len))); #ifdef ICMP_STATS ++lwip_stats.icmp.xmit; #endif /* ICMP_STATS */ /* LWIP_DEBUGF("icmp: p->len %u p->tot_len %u\n", p->len, p->tot_len);*/ ip_output_if (p, &(iphdr->src), IP_HDRINCL, iphdr->hoplim, IP_PROTO_ICMP, inp); break; default: LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %d not supported.\n", (int)type)); #ifdef ICMP_STATS ++lwip_stats.icmp.proterr; ++lwip_stats.icmp.drop; #endif /* ICMP_STATS */ } pbuf_free(p); } void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t) { struct pbuf *q; struct ip_hdr *iphdr; struct icmp_dur_hdr *idur; q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM); /* ICMP header + IP header + 8 bytes of data */ iphdr = p->payload; idur = q->payload; idur->type = (char)ICMP6_DUR; idur->icode = (char)t; memcpy((char *)q->payload + 8, p->payload, IP_HLEN + 8); /* calculate checksum */ idur->chksum = 0; idur->chksum = inet_chksum(idur, q->len); #ifdef ICMP_STATS ++lwip_stats.icmp.xmit; #endif /* ICMP_STATS */ ip_output(q, NULL, (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP); pbuf_free(q); } void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t) { struct pbuf *q; struct ip_hdr *iphdr; struct icmp_te_hdr *tehdr; LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded\n")); q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM); iphdr = p->payload; tehdr = q->payload; tehdr->type = (char)ICMP6_TE; tehdr->icode = (char)t; /* copy fields from original packet */ memcpy((char *)q->payload + 8, (char *)p->payload, IP_HLEN + 8); /* calculate checksum */ tehdr->chksum = 0; tehdr->chksum = inet_chksum(tehdr, q->len); #ifdef ICMP_STATS ++lwip_stats.icmp.xmit; #endif /* ICMP_STATS */ ip_output(q, NULL, (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP); pbuf_free(q); } --- NEW FILE: ip6.c --- /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <ad...@si...> * */ /* ip.c * * This is the code for the IP layer for IPv6. * */ #include "lwip/opt.h" #include "lwip/def.h" #include "lwip/mem.h" #include "lwip/ip.h" #include "lwip/inet.h" #include "lwip/netif.h" #include "lwip/icmp.h" #include "lwip/udp.h" #include "lwip/tcp.h" #include "lwip/stats.h" #include "arch/perf.h" /* ip_init: * * Initializes the IP layer. */ void ip_init(void) { } /* ip_route: * * Finds the appropriate network interface for a given IP address. It searches the * list of network interfaces linearly. A match is found if the masked IP address of * the network interface equals the masked IP address given to the function. */ struct netif * ip_route(struct ip_addr *dest) { struct netif *netif; for(netif = netif_list; netif != NULL; netif = netif->next) { if (ip_addr_maskcmp(dest, &(netif->ip_addr), &(netif->netmask))) { return netif; } } return netif_default; } /* ip_forward: * * Forwards an IP packet. It finds an appropriate route for the packet, decrements * the TTL value of the packet, adjusts the checksum and outputs the packet on the * appropriate interface. */ static void ip_forward(struct pbuf *p, struct ip_hdr *iphdr) { struct netif *netif; PERF_START; if ((netif = ip_route((struct ip_addr *)&(iphdr->dest))) == NULL) { LWIP_DEBUGF(IP_DEBUG, ("ip_input: no forwarding route found for ")); #if IP_DEBUG ip_addr_debug_print(IP_DEBUG, &(iphdr->dest)); #endif /* IP_DEBUG */ LWIP_DEBUGF(IP_DEBUG, ("\n")); pbuf_free(p); return; } /* Decrement TTL and send ICMP if ttl == 0. */ if (--iphdr->hoplim == 0) { /* Don't send ICMP messages in response to ICMP messages */ if (iphdr->nexthdr != IP_PROTO_ICMP) { icmp_time_exceeded(p, ICMP_TE_TTL); } pbuf_free(p); return; } /* Incremental update of the IP checksum. */ /* if (iphdr->chksum >= htons(0xffff - 0x100)) { iphdr->chksum += htons(0x100) + 1; } else { iphdr->chksum += htons(0x100); }*/ LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to ")); #if IP_DEBUG ip_addr_debug_print(IP_DEBUG, &(iphdr->dest)); #endif /* IP_DEBUG */ LWIP_DEBUGF(IP_DEBUG, ("\n")); #ifdef IP_STATS ++lwip_stats.ip.fw; ++lwip_stats.ip.xmit; #endif /* IP_STATS */ PERF_STOP("ip_forward"); netif->output(netif, p, (struct ip_addr *)&(iphdr->dest)); } /* ip_input: * * This function is called by the network interface device driver when an IP packet is * received. The function does the basic checks of the IP header such as packet size * being at least larger than the header size etc. If the packet was not destined for * us, the packet is forwarded (using ip_forward). The IP checksum is always checked. * * Finally, the packet is sent to the upper layer protocol input function. */ void ip_input(struct pbuf *p, struct netif *inp) { struct ip_hdr *iphdr; struct netif *netif; PERF_START; #if IP_DEBUG ip_debug_print(p); #endif /* IP_DEBUG */ #ifdef IP_STATS ++lwip_stats.ip.recv; #endif /* IP_STATS */ /* identify the IP header */ iphdr = p->payload; if (iphdr->v != 6) { LWIP_DEBUGF(IP_DEBUG, ("IP packet dropped due to bad version number\n")); #if IP_DEBUG ip_debug_print(p); #endif /* IP_DEBUG */ pbuf_free(p); #ifdef IP_STATS ++lwip_stats.ip.err; ++lwip_stats.ip.drop; #endif /* IP_STATS */ return; } /* is this packet for us? */ for(netif = netif_list; netif != NULL; netif = netif->next) { #if IP_DEBUG LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest ")); ip_addr_debug_print(IP_DEBUG, &(iphdr->dest)); LWIP_DEBUGF(IP_DEBUG, ("netif->ip_addr ")); ip_addr_debug_print(IP_DEBUG, &(netif->ip_addr)); LWIP_DEBUGF(IP_DEBUG, ("\n")); #endif /* IP_DEBUG */ if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr))) { break; } } if (netif == NULL) { /* packet not for us, route or discard */ #ifdef IP_FORWARD ip_forward(p, iphdr); #endif pbuf_free(p); return; } pbuf_realloc(p, IP_HLEN + ntohs(iphdr->len)); /* send to upper layers */ #if IP_DEBUG /* LWIP_DEBUGF("ip_input: \n"); ip_debug_print(p); LWIP_DEBUGF("ip_input: p->len %u p->tot_len %u\n", p->len, p->tot_len);*/ #endif /* IP_DEBUG */ pbuf_header(p, -IP_HLEN); switch (iphdr->nexthdr) { case IP_PROTO_UDP: udp_input(p); break; case IP_PROTO_TCP: tcp_input(p); break; case IP_PROTO_ICMP: icmp_input(p, inp); break; default: /* send ICMP destination protocol unreachable */ icmp_dest_unreach(p, ICMP_DUR_PROTO); pbuf_free(p); LWIP_DEBUGF(IP_DEBUG, ("Unsupported transport protocol %u\n", iphdr->nexthdr)); #ifdef IP_STATS ++lwip_stats.ip.proterr; ++lwip_stats.ip.drop; #endif /* IP_STATS */ } PERF_STOP("ip_input"); } /* ip_output_if: * * Sends an IP packet on a network interface. This function constructs the IP header * and calculates the IP header checksum. If the source IP address is NULL, * the IP address of the outgoing network interface is filled in as source address. */ err_t ip_output_if (struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto, struct netif *netif) { struct ip_hdr *iphdr; PERF_START; printf("len %u tot_len %u\n", p->len, p->tot_len); if (pbuf_header(p, IP_HLEN)) { LWIP_DEBUGF(IP_DEBUG, ("ip_output: not enough room for IP header in pbuf\n")); #ifdef IP_STATS ++lwip_stats.ip.err; #endif /* IP_STATS */ return ERR_BUF; } printf("len %u tot_len %u\n", p->len, p->tot_len); iphdr = p->payload; if (dest != IP_HDRINCL) { printf("!IP_HDRLINCL\n"); iphdr->hoplim = ttl; iphdr->nexthdr = proto; iphdr->len = htons(p->tot_len - IP_HLEN); ip_addr_set(&(iphdr->dest), dest); iphdr->v = 6; if (ip_addr_isany(src)) { ip_addr_set(&(iphdr->src), &(netif->ip_addr)); } else { ip_addr_set(&(iphdr->src), src); } } else { dest = &(iphdr->dest); } #ifdef IP_STATS ++lwip_stats.ip.xmit; #endif /* IP_STATS */ LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c (len %u)\n", netif->name[0], netif->name[1], p->tot_len)); #if IP_DEBUG ip_debug_print(p); #endif /* IP_DEBUG */ PERF_STOP("ip_output_if"); return netif->output(netif, p, dest); } /* ip_output: * * Simple interface to ip_output_if. It finds the outgoing network interface and * calls upon ip_output_if to do the actual work. */ err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto) { struct netif *netif; if ((netif = ip_route(dest)) == NULL) { LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%lx\n", dest->addr)); #ifdef IP_STATS ++lwip_stats.ip.rterr; #endif /* IP_STATS */ return ERR_RTE; } return ip_output_if (p, src, dest, ttl, proto, netif); } #if IP_DEBUG void ip_debug_print(struct pbuf *p) { struct ip_hdr *iphdr = p->payload; char *payload; payload = (char *)iphdr + IP_HLEN; LWIP_DEBUGF(IP_DEBUG, ("IP header:\n")); LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(IP_DEBUG, ("|%2d | %x%x | %x%x | (v, traffic class, flow label)\n", iphdr->v, iphdr->tclass1, iphdr->tclass2, iphdr->flow1, iphdr->flow2)); LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(IP_DEBUG, ("| %5u | %2u | %2u | (len, nexthdr, hoplim)\n", ntohs(iphdr->len), iphdr->nexthdr, iphdr->hoplim)); LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (src)\n", ntohl(iphdr->src.addr[0]) >> 16 & 0xffff, ntohl(iphdr->src.addr[0]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (src)\n", ntohl(iphdr->src.addr[1]) >> 16 & 0xffff, ntohl(iphdr->src.addr[1]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (src)\n", ntohl(iphdr->src.addr[2]) >> 16 & 0xffff, ntohl(iphdr->src.addr[2]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (src)\n", ntohl(iphdr->src.addr[3]) >> 16 & 0xffff, ntohl(iphdr->src.addr[3]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (dest)\n", ntohl(iphdr->dest.addr[0]) >> 16 & 0xffff, ntohl(iphdr->dest.addr[0]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (dest)\n", ntohl(iphdr->dest.addr[1]) >> 16 & 0xffff, ntohl(iphdr->dest.addr[1]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (dest)\n", ntohl(iphdr->dest.addr[2]) >> 16 & 0xffff, ntohl(iphdr->dest.addr[2]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("| %4lx | %4lx | (dest)\n", ntohl(iphdr->dest.addr[3]) >> 16 & 0xffff, ntohl(iphdr->dest.addr[3]) & 0xffff)); LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n")); } #endif /* IP_DEBUG */ --- NEW FILE: ip6_addr.c --- /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <ad...@si...> * */ #include "lwip/ip_addr.h" #include "lwip/inet.h" int ip_addr_maskcmp(struct ip_addr *addr1, struct ip_addr *addr2, struct ip_addr *mask) { return((addr1->addr[0] & mask->addr[0]) == (addr2->addr[0] & mask->addr[0]) && (addr1->addr[1] & mask->addr[1]) == (addr2->addr[1] & mask->addr[1]) && (addr1->addr[2] & mask->addr[2]) == (addr2->addr[2] & mask->addr[2]) && (addr1->addr[3] & mask->addr[3]) == (addr2->addr[3] & mask->addr[3])); } int ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2) { return(addr1->addr[0] == addr2->addr[0] && addr1->addr[1] == addr2->addr[1] && addr1->addr[2] == addr2->addr[2] && addr1->addr[3] == addr2->addr[3]); } void ip_addr_set(struct ip_addr *dest, struct ip_addr *src) { memcpy(dest, src, sizeof(struct ip_addr)); /* dest->addr[0] = src->addr[0]; dest->addr[1] = src->addr[1]; dest->addr[2] = src->addr[2]; dest->addr[3] = src->addr[3];*/ } int ip_addr_isany(struct ip_addr *addr) { if (addr == NULL) return 1; return((addr->addr[0] | addr->addr[1] | addr->addr[2] | addr->addr[3]) == 0); } /*#if IP_DEBUG*/ void ip_addr_debug_print(struct ip_addr *addr) { printf("%lx:%lx:%lx:%lx:%lx:%lx:%lx:%lx", ntohl(addr->addr[0]) >> 16 & 0xffff, ntohl(addr->addr[0]) & 0xffff, ntohl(addr->addr[1]) >> 16 & 0xffff, ntohl(addr->addr[1]) & 0xffff, ntohl(addr->addr[2]) >> 16 & 0xffff, ntohl(addr->addr[2]) & 0xffff, ntohl(addr->addr[3]) >> 16 & 0xffff, ntohl(addr->addr[3]) & 0xffff); } /*#endif*/ /* IP_DEBUG */ |