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Improve debugging
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bcdb6fad3e
commit
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@ -47,36 +47,38 @@ static struct ipv4_miniroute * add_ipv4_miniroute ( struct net_device *netdev,
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struct in_addr gateway ) {
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struct ipv4_miniroute *miniroute;
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DBG ( "IPv4 add %s", inet_ntoa ( address ) );
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DBG ( "/%s ", inet_ntoa ( netmask ) );
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if ( gateway.s_addr != INADDR_NONE )
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DBG ( "gw %s ", inet_ntoa ( gateway ) );
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DBG ( "via %s\n", netdev->name );
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/* Allocate and populate miniroute structure */
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miniroute = malloc ( sizeof ( *miniroute ) );
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if ( miniroute ) {
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DBG ( "IPv4 add %s", inet_ntoa ( address ) );
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DBG ( "/%s ", inet_ntoa ( netmask ) );
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if ( gateway.s_addr != INADDR_NONE )
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DBG ( "gw %s ", inet_ntoa ( gateway ) );
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DBG ( "via %s\n", netdev->name );
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/* Record routing information */
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miniroute->netdev = netdev;
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miniroute->address = address;
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miniroute->netmask = netmask;
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miniroute->gateway = gateway;
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/* Add to end of list if we have a gateway, otherwise
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* to start of list.
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*/
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if ( gateway.s_addr != INADDR_NONE ) {
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list_add_tail ( &miniroute->list, &ipv4_miniroutes );
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} else {
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list_add ( &miniroute->list, &ipv4_miniroutes );
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}
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/* Record reference to net_device */
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miniroute->netdev_ref.forget = ipv4_forget_netdev;
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ref_add ( &miniroute->netdev_ref, &netdev->references );
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if ( ! miniroute ) {
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DBG ( "IPv4 could not add miniroute\n" );
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return NULL;
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}
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/* Record routing information */
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miniroute->netdev = netdev;
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miniroute->address = address;
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miniroute->netmask = netmask;
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miniroute->gateway = gateway;
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/* Add to end of list if we have a gateway, otherwise
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* to start of list.
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*/
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if ( gateway.s_addr != INADDR_NONE ) {
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list_add_tail ( &miniroute->list, &ipv4_miniroutes );
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} else {
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list_add ( &miniroute->list, &ipv4_miniroutes );
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}
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/* Record reference to net_device */
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miniroute->netdev_ref.forget = ipv4_forget_netdev;
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ref_add ( &miniroute->netdev_ref, &netdev->references );
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return miniroute;
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}
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@ -391,8 +393,8 @@ static int ipv4_tx ( struct pk_buff *pkb,
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/* Determine link-layer destination address */
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if ( ( rc = ipv4_ll_addr ( next_hop, iphdr->src, netdev,
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ll_dest ) ) != 0 ) {
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DBG ( "IPv4 has no link-layer address for %s\n",
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inet_ntoa ( iphdr->dest ) );
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DBG ( "IPv4 has no link-layer address for %s: %s\n",
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inet_ntoa ( iphdr->dest ), strerror ( rc ) );
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goto err;
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}
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@ -408,7 +410,13 @@ static int ipv4_tx ( struct pk_buff *pkb,
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ntohs ( iphdr->ident ), ntohs ( iphdr->chksum ) );
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/* Hand off to link layer */
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return net_tx ( pkb, netdev, &ipv4_protocol, ll_dest );
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if ( ( rc = net_tx ( pkb, netdev, &ipv4_protocol, ll_dest ) ) != 0 ) {
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DBG ( "IPv4 could not transmit packet via %s: %s\n",
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netdev->name, strerror ( rc ) );
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return rc;
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}
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return 0;
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err:
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free_pkb ( pkb );
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@ -436,6 +444,7 @@ static int ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev __unused,
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} src, dest;
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uint16_t csum;
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uint16_t pshdr_csum;
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int rc;
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/* Sanity check the IPv4 header */
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if ( pkb_len ( pkb ) < sizeof ( *iphdr ) ) {
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@ -506,7 +515,14 @@ static int ipv4_rx ( struct pk_buff *pkb, struct net_device *netdev __unused,
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memset ( &dest, 0, sizeof ( dest ) );
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dest.sin.sin_family = AF_INET;
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dest.sin.sin_addr = iphdr->dest;
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return tcpip_rx ( pkb, iphdr->protocol, &src.st, &dest.st, pshdr_csum);
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if ( ( rc = tcpip_rx ( pkb, iphdr->protocol, &src.st,
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&dest.st, pshdr_csum ) ) != 0 ) {
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DBG ( "IPv4 received packet rejected by stack: %s\n",
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strerror ( rc ) );
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return rc;
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}
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return 0;
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err:
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free_pkb ( pkb );
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