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Improved debugging

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This commit is contained in:
Michael Brown 2007-01-16 03:10:37 +00:00
parent 143d14614d
commit 835d35749f
1 changed files with 24 additions and 15 deletions
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39
src/net/udp/dhcp.c
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@ -387,6 +387,7 @@ static void merge_dhcp_field ( struct dhcp_option_block *options,
/**
* Parse DHCP packet and construct DHCP options block
*
* @v dhcp DHCP session
* @v dhcphdr DHCP packet
* @v len Length of DHCP packet
* @ret options DHCP options block, or NULL
@ -406,7 +407,8 @@ static void merge_dhcp_field ( struct dhcp_option_block *options,
* options block; it is the responsibility of the caller to eventually
* free this memory.
*/
static struct dhcp_option_block * dhcp_parse ( struct dhcphdr *dhcphdr,
static struct dhcp_option_block * dhcp_parse ( struct dhcp_session *dhcp,
struct dhcphdr *dhcphdr,
size_t len ) {
struct dhcp_option_block *options;
size_t options_len;
@ -441,8 +443,8 @@ static struct dhcp_option_block * dhcp_parse ( struct dhcphdr *dhcphdr,
/* Allocate empty options block of required size */
options = alloc_dhcp_options ( options_len );
if ( ! options ) {
DBG ( "DHCP could not allocate %d-byte option block\n",
options_len );
DBGC ( dhcp, "DHCP %p could not allocate %d-byte option "
"block\n", dhcp, options_len );
return NULL;
}
@ -546,7 +548,8 @@ static int dhcp_senddata ( struct udp_connection *conn,
struct dhcp_packet dhcppkt;
int rc;
DBG ( "Transmitting %s\n", dhcp_msgtype_name ( dhcp->state ) );
DBGC ( dhcp, "DHCP %p transmitting %s\n",
dhcp, dhcp_msgtype_name ( dhcp->state ) );
assert ( ( dhcp->state == DHCPDISCOVER ) ||
( dhcp->state == DHCPREQUEST ) );
@ -554,14 +557,16 @@ static int dhcp_senddata ( struct udp_connection *conn,
/* Create DHCP packet in temporary buffer */
if ( ( rc = create_dhcp_packet ( dhcp->netdev, dhcp->state, buf, len,
&dhcppkt ) ) != 0 ) {
DBG ( "Could not create DHCP packet\n" );
DBGC ( dhcp, "DHCP %p could not create DHCP packet: %s\n",
dhcp, strerror ( rc ) );
return rc;
}
/* Copy in options common to all requests */
if ( ( rc = copy_dhcp_packet_options ( &dhcppkt,
&dhcp_request_options ) ) != 0){
DBG ( "Could not set common DHCP options\n" );
DBGC ( dhcp, "DHCP %p could not set common DHCP options: %s\n",
dhcp, strerror ( rc ) );
return rc;
}
@ -570,13 +575,15 @@ static int dhcp_senddata ( struct udp_connection *conn,
if ( ( rc = copy_dhcp_packet_option ( &dhcppkt, dhcp->options,
DHCP_SERVER_IDENTIFIER,
DHCP_SERVER_IDENTIFIER ) ) != 0 ) {
DBG ( "Could not set server identifier option\n" );
DBGC ( dhcp, "DHCP %p could not set server identifier "
"option: %s\n", dhcp, strerror ( rc ) );
return rc;
}
if ( ( rc = copy_dhcp_packet_option ( &dhcppkt, dhcp->options,
DHCP_EB_YIADDR,
DHCP_REQUESTED_ADDRESS ) ) != 0 ) {
DBG ( "Could not set requested address option\n" );
DBGC ( dhcp, "DHCP %p could not set requested address "
"option: %s\n", dhcp, strerror ( rc ) );
return rc;
}
}
@ -584,7 +591,8 @@ static int dhcp_senddata ( struct udp_connection *conn,
/* Transmit the packet */
if ( ( rc = udp_sendto_via ( conn, &sa_dhcp_server.st, dhcp->netdev,
dhcppkt.dhcphdr, dhcppkt.len ) ) != 0 ) {
DBG ( "Could not transmit UDP packet\n" );
DBGC ( dhcp, "DHCP %p could not transmit UDP packet: %s\n",
dhcp, strerror ( rc ) );
return rc;
}
@ -637,22 +645,23 @@ static int dhcp_newdata ( struct udp_connection *conn, void *data, size_t len,
/* Check for matching transaction ID */
if ( dhcphdr->xid != dhcp_xid ( dhcp->netdev ) ) {
DBG ( "DHCP wrong transaction ID (wanted %08lx, got %08lx)\n",
ntohl ( dhcphdr->xid ),
ntohl ( dhcp_xid ( dhcp->netdev ) ) );
DBGC ( dhcp, "DHCP %p wrong transaction ID (wanted %08lx, "
"got %08lx)\n", dhcp, ntohl ( dhcphdr->xid ),
ntohl ( dhcp_xid ( dhcp->netdev ) ) );
return 0;
};
/* Parse packet and create options structure */
options = dhcp_parse ( dhcphdr, len );
options = dhcp_parse ( dhcp, dhcphdr, len );
if ( ! options ) {
DBG ( "Could not parse DHCP packet\n" );
DBGC ( dhcp, "DHCP %p could not parse DHCP packet\n", dhcp );
return -EINVAL;
}
/* Determine message type */
msgtype = find_dhcp_num_option ( options, DHCP_MESSAGE_TYPE );
DBG ( "Received %s\n", dhcp_msgtype_name ( msgtype ) );
DBGC ( dhcp, "DHCP %p received %s\n",
dhcp, dhcp_msgtype_name ( msgtype ) );
/* Handle DHCP reply */
switch ( dhcp->state ) {