net: Refactored ARP packet header handling
The ARP packet header contained ethernet header. This is very confusing so separate the link layer header. Fixed also the unit tests to run properly. Change-Id: I8b00bde280ad9f49494766370acb2a8e9cade033 Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen
parent
aab6665f2f
commit
53caa13652
4 changed files with 83 additions and 63 deletions
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@ -27,10 +27,9 @@
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#include <net/ethernet.h>
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#define NET_ARP_BUF(buf) ((struct net_arp_hdr *)net_nbuf_ll(buf))
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#define NET_ARP_BUF(buf) ((struct net_arp_hdr *)net_nbuf_ip_data(buf))
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struct net_arp_hdr {
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struct net_eth_hdr eth_hdr;
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uint16_t hwtype; /* HTYPE */
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uint16_t protocol; /* PTYPE */
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uint8_t hwlen; /* HLEN */
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@ -113,6 +113,7 @@ static inline struct net_buf *prepare_arp(struct net_if *iface,
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{
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struct net_buf *buf, *frag;
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struct net_arp_hdr *hdr;
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struct net_eth_hdr *eth;
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struct in_addr *my_addr;
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buf = net_nbuf_get_reserve_tx(0);
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@ -131,6 +132,7 @@ static inline struct net_buf *prepare_arp(struct net_if *iface,
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net_nbuf_ll_reserve(buf) = sizeof(struct net_eth_hdr);
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hdr = NET_ARP_BUF(buf);
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eth = NET_ETH_BUF(buf);
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/* If entry is not set, then we are just about to send
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* an ARP request using the data in pending net_buf.
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@ -143,17 +145,17 @@ static inline struct net_buf *prepare_arp(struct net_if *iface,
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net_ipaddr_copy(&entry->ip, &NET_IPV4_BUF(pending)->dst);
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memcpy(&hdr->eth_hdr.src.addr,
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memcpy(ð->src.addr,
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net_if_get_link_addr(entry->iface)->addr,
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sizeof(struct net_eth_addr));
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} else {
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memcpy(&hdr->eth_hdr.src.addr,
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memcpy(ð->src.addr,
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net_if_get_link_addr(iface)->addr,
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sizeof(struct net_eth_addr));
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}
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hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
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memset(&hdr->eth_hdr.dst.addr, 0xff, sizeof(struct net_eth_addr));
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eth->type = htons(NET_ETH_PTYPE_ARP);
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memset(ð->dst.addr, 0xff, sizeof(struct net_eth_addr));
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hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
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hdr->protocol = htons(NET_ETH_PTYPE_IP);
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@ -170,7 +172,7 @@ static inline struct net_buf *prepare_arp(struct net_if *iface,
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net_ipaddr_copy(&hdr->dst_ipaddr, &NET_IPV4_BUF(pending)->dst);
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}
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memcpy(hdr->src_hwaddr.addr, hdr->eth_hdr.src.addr,
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memcpy(hdr->src_hwaddr.addr, eth->src.addr,
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sizeof(struct net_eth_addr));
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if (entry) {
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@ -185,8 +187,7 @@ static inline struct net_buf *prepare_arp(struct net_if *iface,
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memset(&hdr->src_ipaddr, 0, sizeof(struct in_addr));
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}
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net_buf_add(frag,
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sizeof(struct net_arp_hdr) - sizeof(struct net_eth_hdr));
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net_buf_add(frag, sizeof(struct net_arp_hdr));
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return buf;
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@ -311,8 +312,9 @@ static inline void send_pending(struct net_if *iface, struct net_buf **buf)
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{
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struct net_buf *pending = *buf;
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NET_DBG("dst %s pending %p",
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net_sprint_ipv4_addr(&NET_IPV4_BUF(pending)->dst), pending);
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NET_DBG("dst %s pending %p frag %p",
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net_sprint_ipv4_addr(&NET_IPV4_BUF(pending)->dst), pending,
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pending->frags);
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*buf = NULL;
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@ -355,6 +357,13 @@ static inline void arp_update(struct net_if *iface,
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memcpy(&arp_table[i].eth, hwaddr,
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sizeof(struct net_eth_addr));
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/* Set the dst in the pending packet */
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net_nbuf_ll_dst(arp_table[i].pending)->len =
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sizeof(struct net_eth_addr);
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net_nbuf_ll_dst(arp_table[i].pending)->addr =
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(uint8_t *)
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&NET_ETH_BUF(arp_table[i].pending)->dst.addr;
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send_pending(iface, &arp_table[i].pending);
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}
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@ -368,6 +377,7 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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{
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struct net_buf *buf, *frag;
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struct net_arp_hdr *hdr, *query;
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struct net_eth_hdr *eth, *eth_query;
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buf = net_nbuf_get_reserve_tx(0);
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if (!buf) {
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@ -385,13 +395,15 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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net_nbuf_ll_reserve(buf) = sizeof(struct net_eth_hdr);
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hdr = NET_ARP_BUF(buf);
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eth = NET_ETH_BUF(buf);
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query = NET_ARP_BUF(req);
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eth_query = NET_ETH_BUF(req);
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hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
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eth->type = htons(NET_ETH_PTYPE_ARP);
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memcpy(&hdr->eth_hdr.dst.addr, &query->eth_hdr.src.addr,
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memcpy(ð->dst.addr, ð_query->src.addr,
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sizeof(struct net_eth_addr));
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memcpy(&hdr->eth_hdr.src.addr, net_if_get_link_addr(iface)->addr,
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memcpy(ð->src.addr, net_if_get_link_addr(iface)->addr,
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sizeof(struct net_eth_addr));
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hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
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@ -400,19 +412,15 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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hdr->protolen = sizeof(struct in_addr);
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hdr->opcode = htons(NET_ARP_REPLY);
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memcpy(&hdr->dst_hwaddr.addr, &query->eth_hdr.src.addr,
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memcpy(&hdr->dst_hwaddr.addr, ð_query->src.addr,
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sizeof(struct net_eth_addr));
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memcpy(&hdr->src_hwaddr.addr, &hdr->eth_hdr.src.addr,
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memcpy(&hdr->src_hwaddr.addr, ð->src.addr,
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sizeof(struct net_eth_addr));
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net_ipaddr_copy(&hdr->dst_ipaddr, &query->src_ipaddr);
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net_ipaddr_copy(&hdr->src_ipaddr, &query->dst_ipaddr);
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/* The ethernet header is already added to fragment length (because
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* of the reserve) so we must not add it again.
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*/
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net_buf_add(frag,
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sizeof(struct net_arp_hdr) - sizeof(struct net_eth_hdr));
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net_buf_add(frag, sizeof(struct net_arp_hdr));
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return buf;
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@ -5,13 +5,15 @@ CONFIG_NET_IPV4=y
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CONFIG_NET_YAIP=y
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CONFIG_NET_BUF=y
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CONFIG_MAIN_STACK_SIZE=2048
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CONFIG_NET_NBUF_RX_COUNT=3
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CONFIG_NET_NBUF_TX_COUNT=4
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CONFIG_NET_NBUF_DATA_COUNT=7
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CONFIG_NET_NBUF_RX_COUNT=5
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CONFIG_NET_NBUF_TX_COUNT=5
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CONFIG_NET_NBUF_DATA_COUNT=10
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CONFIG_NET_LOG=y
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CONFIG_SYS_LOG_SHOW_COLOR=y
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CONFIG_TEST_RANDOM_GENERATOR=y
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CONFIG_NET_IFACE_UNICAST_IPV4_ADDR_COUNT=3
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CONFIG_NETWORK_IP_STACK_DEBUG_IPV4_ARP=y
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CONFIG_NETWORK_IP_STACK_DEBUG_NET_BUF=y
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CONFIG_NETWORK_IP_STACK_DEBUG_IF=y
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CONFIG_NETWORK_IP_STACK_DEBUG_CORE=y
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CONFIG_NETWORK_IP_STACK_DEBUG_L2=y
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@ -48,8 +48,6 @@ static bool req_test;
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static char *app_data = "0123456789";
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static const struct net_eth_addr broadcast_eth_addr = {
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{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff } };
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static const struct net_eth_addr multicast_eth_addr = {
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{ 0x01, 0x00, 0x5e, 0x01, 0x02, 0x03 } };
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@ -98,14 +96,12 @@ static struct net_eth_addr hwaddr = { { 0x42, 0x11, 0x69, 0xde, 0xfa, 0xec } };
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static int send_status = -EINVAL;
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#define NET_ARP_BUF(buf) ((struct net_arp_hdr *)net_nbuf_ll(buf))
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static int tester_send(struct net_if *iface, struct net_buf *buf)
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{
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struct net_eth_hdr *hdr;
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if (!buf->frags) {
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printk("No data to send!");
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printk("No data to send!\n");
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return -ENODATA;
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}
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@ -119,8 +115,7 @@ static int tester_send(struct net_if *iface, struct net_buf *buf)
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hdr = (struct net_eth_hdr *)net_nbuf_ll(buf);
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if (ntohs(hdr->type) == NET_ETH_PTYPE_ARP) {
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struct net_arp_hdr *arp_hdr =
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(struct net_arp_hdr *)net_nbuf_ll(buf);
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struct net_arp_hdr *arp_hdr = NET_ARP_BUF(buf);
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if (ntohs(arp_hdr->opcode) == NET_ARP_REPLY) {
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if (!req_test && buf != pending_buf) {
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@ -195,6 +190,7 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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{
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struct net_buf *buf, *frag;
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struct net_arp_hdr *hdr;
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struct net_eth_hdr *eth;
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buf = net_nbuf_get_reserve_tx(0);
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if (!buf) {
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@ -210,12 +206,13 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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net_nbuf_iface(buf) = iface;
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net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
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hdr = (struct net_arp_hdr *)net_nbuf_ll(buf);
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hdr = NET_ARP_BUF(buf);
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eth = NET_ETH_BUF(buf);
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hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
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eth->type = htons(NET_ETH_PTYPE_ARP);
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memset(&hdr->eth_hdr.dst.addr, 0xff, sizeof(struct net_eth_addr));
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memcpy(&hdr->eth_hdr.src.addr, net_if_get_link_addr(iface)->addr,
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memset(ð->dst.addr, 0xff, sizeof(struct net_eth_addr));
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memcpy(ð->src.addr, net_if_get_link_addr(iface)->addr,
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sizeof(struct net_eth_addr));
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hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
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@ -224,7 +221,7 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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hdr->protolen = sizeof(struct in_addr);
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hdr->opcode = htons(NET_ARP_REPLY);
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memcpy(&hdr->dst_hwaddr.addr, &hdr->eth_hdr.src.addr,
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memcpy(&hdr->dst_hwaddr.addr, ð->src.addr,
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sizeof(struct net_eth_addr));
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memcpy(&hdr->src_hwaddr.addr, addr,
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sizeof(struct net_eth_addr));
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@ -232,7 +229,7 @@ static inline struct net_buf *prepare_arp_reply(struct net_if *iface,
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net_ipaddr_copy(&hdr->dst_ipaddr, &NET_ARP_BUF(req)->src_ipaddr);
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net_ipaddr_copy(&hdr->src_ipaddr, &NET_ARP_BUF(req)->dst_ipaddr);
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net_buf_add(frag, sizeof(struct net_arp_hdr) - net_buf_headroom(frag));
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net_buf_add(frag, sizeof(struct net_arp_hdr));
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return buf;
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@ -247,6 +244,7 @@ static inline struct net_buf *prepare_arp_request(struct net_if *iface,
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{
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struct net_buf *buf, *frag;
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struct net_arp_hdr *hdr, *req_hdr;
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struct net_eth_hdr *eth, *eth_req;
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buf = net_nbuf_get_reserve_rx(0);
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if (!buf) {
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@ -262,13 +260,15 @@ static inline struct net_buf *prepare_arp_request(struct net_if *iface,
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net_nbuf_iface(buf) = iface;
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net_nbuf_ll_reserve(buf) = sizeof(struct net_eth_hdr);
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hdr = (struct net_arp_hdr *)net_nbuf_ll(buf);
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req_hdr = (struct net_arp_hdr *)net_nbuf_ll(req);
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hdr = NET_ARP_BUF(buf);
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eth = NET_ETH_BUF(buf);
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req_hdr = NET_ARP_BUF(req);
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eth_req = NET_ETH_BUF(req);
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hdr->eth_hdr.type = htons(NET_ETH_PTYPE_ARP);
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eth->type = htons(NET_ETH_PTYPE_ARP);
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memset(&hdr->eth_hdr.dst.addr, 0xff, sizeof(struct net_eth_addr));
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memcpy(&hdr->eth_hdr.src.addr, addr, sizeof(struct net_eth_addr));
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memset(ð->dst.addr, 0xff, sizeof(struct net_eth_addr));
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memcpy(ð->src.addr, addr, sizeof(struct net_eth_addr));
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hdr->hwtype = htons(NET_ARP_HTYPE_ETH);
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hdr->protocol = htons(NET_ETH_PTYPE_IP);
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@ -282,7 +282,7 @@ static inline struct net_buf *prepare_arp_request(struct net_if *iface,
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net_ipaddr_copy(&hdr->src_ipaddr, &req_hdr->src_ipaddr);
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net_ipaddr_copy(&hdr->dst_ipaddr, &req_hdr->dst_ipaddr);
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net_buf_add(frag, sizeof(struct net_arp_hdr) - net_buf_headroom(frag));
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net_buf_add(frag, sizeof(struct net_arp_hdr));
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return buf;
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@ -383,15 +383,15 @@ void main(void)
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eth_hdr = (struct net_eth_hdr *)net_nbuf_ll(buf);
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if (memcmp(ð_hdr->dst.addr, &broadcast_eth_addr,
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if (memcmp(ð_hdr->dst.addr, net_eth_broadcast_addr(),
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sizeof(struct net_eth_addr))) {
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char out[sizeof("xx:xx:xx:xx:xx:xx")];
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snprintf(out, sizeof(out),
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net_sprint_ll_addr((uint8_t *)ð_hdr->dst.addr,
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sizeof(struct net_eth_addr)));
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printk("ETH addr dest invalid %s, should be %s", out,
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net_sprint_ll_addr((uint8_t *)&broadcast_eth_addr,
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sizeof(broadcast_eth_addr)));
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net_sprint_ll_addr((uint8_t *)net_eth_broadcast_addr(),
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sizeof(struct net_eth_addr)));
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return;
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}
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@ -412,7 +412,7 @@ void main(void)
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sizeof(struct net_eth_addr)));
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printk("ETH maddr dest invalid %s, should be %s", out,
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net_sprint_ll_addr((uint8_t *)&multicast_eth_addr,
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sizeof(broadcast_eth_addr)));
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sizeof(struct net_eth_addr)));
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return;
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}
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@ -489,12 +489,13 @@ void main(void)
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pending_buf = buf;
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/* buf2 should contain the arp header, verify it */
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if (memcmp(net_nbuf_ll(buf2), &broadcast_eth_addr,
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if (memcmp(net_nbuf_ll(buf2), net_eth_broadcast_addr(),
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sizeof(struct net_eth_addr))) {
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printk("ARP ETH dest address invalid\n");
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net_hexdump("ETH dest correct", net_nbuf_ll(buf2),
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net_hexdump("ETH dest wrong ", net_nbuf_ll(buf2),
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sizeof(struct net_eth_addr));
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net_hexdump("ETH dest wrong ", (uint8_t *)&broadcast_eth_addr,
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net_hexdump("ETH dest correct",
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(uint8_t *)net_eth_broadcast_addr(),
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sizeof(struct net_eth_addr));
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return;
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}
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@ -512,11 +513,12 @@ void main(void)
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return;
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}
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arp_hdr = (struct net_arp_hdr *)net_nbuf_ll(buf2);
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arp_hdr = NET_ARP_BUF(buf2);
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eth_hdr = NET_ETH_BUF(buf2);
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if (arp_hdr->eth_hdr.type != htons(NET_ETH_PTYPE_ARP)) {
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if (eth_hdr->type != htons(NET_ETH_PTYPE_ARP)) {
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printk("ETH type 0x%x, should be 0x%x\n",
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arp_hdr->eth_hdr.type, htons(NET_ETH_PTYPE_ARP));
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eth_hdr->type, htons(NET_ETH_PTYPE_ARP));
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return;
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}
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@ -570,6 +572,11 @@ void main(void)
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return;
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}
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/* We could have send the new ARP request but for this test we
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* just free it.
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*/
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net_nbuf_unref(buf2);
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if (buf->ref != 2) {
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printk("ARP cache should own the original buffer\n");
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return;
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@ -590,7 +597,7 @@ void main(void)
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return;
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}
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arp_hdr = (struct net_arp_hdr *)net_nbuf_ll(buf2);
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arp_hdr = NET_ARP_BUF(buf2);
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if (!net_ipv4_addr_cmp(&arp_hdr->dst_ipaddr, &iface->ipv4.gw)) {
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char out[sizeof("xxx.xxx.xxx.xxx")];
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@ -614,11 +621,13 @@ void main(void)
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net_buf_ref(buf);
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buf2 = net_arp_prepare(buf);
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if (buf2) {
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printk("ARP cache should fail now\n");
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if (!buf2) {
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printk("ARP cache is not sending the request again\n");
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return;
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}
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net_nbuf_unref(buf2);
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/* Try to find the different destination, this should fail too
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* as the cache table should be full.
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*/
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@ -630,8 +639,8 @@ void main(void)
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net_buf_ref(buf);
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buf2 = net_arp_prepare(buf);
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if (buf2) {
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printk("ARP cache should fail again\n");
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if (!buf2) {
|
||||
printk("ARP cache did not send a req\n");
|
||||
return;
|
||||
}
|
||||
|
||||
|
|
@ -648,20 +657,22 @@ void main(void)
|
|||
printk("Out of mem RX reply\n");
|
||||
return;
|
||||
}
|
||||
printk("%d buf %p\n", __LINE__, buf);
|
||||
|
||||
frag = net_nbuf_get_reserve_data(sizeof(struct net_eth_hdr));
|
||||
if (!frag) {
|
||||
printk("Out of mem DATA reply\n");
|
||||
return;
|
||||
}
|
||||
printk("%d frag %p\n", __LINE__, frag);
|
||||
|
||||
net_buf_frag_add(buf, frag);
|
||||
|
||||
net_nbuf_ll_reserve(buf) = net_buf_headroom(frag);
|
||||
net_nbuf_iface(buf) = iface;
|
||||
|
||||
arp_hdr = (struct net_arp_hdr *)net_nbuf_ll(buf);
|
||||
net_buf_add(buf, sizeof(struct net_arp_hdr));
|
||||
arp_hdr = NET_ARP_BUF(buf);
|
||||
net_buf_add(frag, sizeof(struct net_arp_hdr));
|
||||
|
||||
net_ipaddr_copy(&arp_hdr->dst_ipaddr, &dst);
|
||||
net_ipaddr_copy(&arp_hdr->src_ipaddr, &src);
|
||||
|
|
@ -672,6 +683,7 @@ void main(void)
|
|||
return;
|
||||
}
|
||||
|
||||
/* The pending packet should now be sent */
|
||||
switch (net_arp_input(buf2)) {
|
||||
case NET_OK:
|
||||
case NET_CONTINUE:
|
||||
|
|
@ -714,9 +726,8 @@ void main(void)
|
|||
net_nbuf_iface(buf) = iface;
|
||||
send_status = -EINVAL;
|
||||
|
||||
arp_hdr = (struct net_arp_hdr *)net_nbuf_ll(buf);
|
||||
net_buf_add(frag, sizeof(struct net_arp_hdr) -
|
||||
net_nbuf_ll_reserve(buf));
|
||||
arp_hdr = NET_ARP_BUF(buf);
|
||||
net_buf_add(frag, sizeof(struct net_arp_hdr));
|
||||
|
||||
net_ipaddr_copy(&arp_hdr->dst_ipaddr, &src);
|
||||
net_ipaddr_copy(&arp_hdr->src_ipaddr, &dst);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue