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Added documentation and comments.

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likewise 2003-03-25 12:59:42 +00:00
parent 6621f8b88a
commit fa34d51b7e
11 changed files with 210 additions and 177 deletions
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27
doc/contrib.txt
View File

@ -3,30 +3,29 @@ How to contribute to lwIP
Here is a short list of suggestions to anybody working with lwIP and
trying to contribute bugreports, fixes, enhancements, platform ports etc.
First of all as you may already know lwIP is a volunteer project so feedback
to fixes or questions might often come late.Hopefully the bug and patch tracking
features of savannah help us not lose users' input.
to fixes or questions might often come late. Hopefully the bug and patch tracking
features of Savannah help us not lose users' input.
The suggestions:
- if you think you found a bug make sure it's not already filed in the bugtracker at savannah
- if you have a fix put the patch on savannah.If it's a patch that affects both core and arch specific
- If you think you found a bug make sure it's not already filed in the bugtracker at savannah
- If you have a fix put the patch on Savannah. If it's a patch that affects both core and arch specific
stuff please separate them so that the core can be applied separately while leaving the other patch 'open'
The preffered way is to NOT touch archs you can't test and let maintainers take care of them.This is a good
The prefered way is to NOT touch archs you can't test and let maintainers take care of them. This is a good
way to see if they are used at all - the same goes for unix netifs except tapif.
- do not file a bug and post a fix to it to the patch area.Either a bug report or a patch will be enough.
If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
- trivial patches (compiler warning, indentation and spelling fixes or anything obvious which takes a line or two)
can go to the lwip-users list.This is still the fastest way of interaction and the list is not so crowded
as to allow for loss of fixes.Putting bugs on savannah and subsequently closing them is too much an overhead
for repoting a compiler warning fix.
- Do not file a bug and post a fix to it to the patch area. Either a bug report or a patch will be enough.
If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
- Trivial patches (compiler warning, indentation and spelling fixes or anything obvious which takes a line or two)
can go to the lwip-users list. This is still the fastest way of interaction and the list is not so crowded
as to allow for loss of fixes. Putting bugs on Savannah and subsequently closing them is too much an overhead
for reporting a compiler warning fix.
For platform porters:
- if you've ported lwIP to a platform (an OS, a uC/processor or a combination of these) and you think it
- If you've ported lwIP to a platform (an OS, a uC/processor or a combination of these) and you think it
could benefit others[1] you might want to post an url to a tarball or zip from which it can be imported
to the contrib CVS module.Then you get CVS access and have to maintain your port :)
to the contrib CVS module. Then you get CVS access and have to maintain your port :)
[1] - lwIP CVS should not be just a place to keep your port so you don't have to set up your own CVS :)
Especially welcome are ports to common enough OS/hardware that others can have access too.

171
src/core/dhcp.c
View File

@ -1,4 +1,11 @@
/**
* @file
*
* Dynamic Host Configuration Protocol client
*/
/*
*
* Copyright (c) 2001-2003 Leon Woestenberg <leon.woestenberg@gmx.net>
* Copyright (c) 2001-2003 Axon Digital Design B.V., The Netherlands.
* All rights reserved.
@ -131,9 +138,9 @@ static void dhcp_option_trailer(struct dhcp *dhcp);
static void dhcp_handle_nak(struct netif *netif) {
struct dhcp *dhcp = netif->dhcp;
u16_t msecs = 10 * 1000;
DEBUGF(DHCP_DEBUG, ("dhcp_handle_nak()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_handle_nak()"));
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_handle_nak(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_handle_nak(): set request timeout %u msecs", msecs));
dhcp_set_state(dhcp, DHCP_BACKING_OFF);
}
@ -150,12 +157,12 @@ static void dhcp_check(struct netif *netif)
struct pbuf *p;
err_t result;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_check()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_check()"));
/* create an ARP query for the offered IP address, expecting that no host
responds, as the IP address should not be in use. */
p = etharp_query(netif, &dhcp->offered_ip_addr, NULL);
if (p != NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_check(): sending ARP request len %u", p->tot_len));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_check(): sending ARP request len %u", p->tot_len));
result = netif->linkoutput(netif, p);
pbuf_free(p);
p = NULL;
@ -163,7 +170,7 @@ static void dhcp_check(struct netif *netif)
dhcp->tries++;
msecs = 500;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_check(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_check(): set request timeout %u msecs", msecs));
dhcp_set_state(dhcp, DHCP_CHECKING);
}
@ -180,10 +187,10 @@ static void dhcp_handle_offer(struct netif *netif)
if (option_ptr != NULL)
{
dhcp->server_ip_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2]));
DEBUGF(DHCP_DEBUG, ("dhcp_handle_offer(): server 0x%08lx", dhcp->server_ip_addr.addr));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_handle_offer(): server 0x%08lx", dhcp->server_ip_addr.addr));
/* remember offered address */
ip_addr_set(&dhcp->offered_ip_addr, (struct ip_addr *)&dhcp->msg_in->yiaddr);
DEBUGF(DHCP_DEBUG, ("dhcp_handle_offer(): offer for 0x%08lx", dhcp->offered_ip_addr.addr));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_handle_offer(): offer for 0x%08lx", dhcp->offered_ip_addr.addr));
dhcp_select(netif);
}
}
@ -201,7 +208,7 @@ static err_t dhcp_select(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result;
u32_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_select()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_select()"));
/* create and initialize the DHCP message header */
result = dhcp_create_request(netif);
@ -242,7 +249,7 @@ static err_t dhcp_select(struct netif *netif)
dhcp->tries++;
msecs = dhcp->tries < 4 ? dhcp->tries * 1000 : 4 * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_select(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_select(): set request timeout %u msecs", msecs));
dhcp_set_state(dhcp, DHCP_REQUESTING);
return result;
}
@ -254,19 +261,19 @@ static err_t dhcp_select(struct netif *netif)
void dhcp_coarse_tmr()
{
struct netif *netif = netif_list;
DEBUGF(DHCP_DEBUG, ("dhcp_coarse_tmr():"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_coarse_tmr():"));
/* iterate through all network interfaces */
while (netif != NULL) {
/* only act on DHCP configured interfaces */
if (netif->dhcp != NULL) {
/* timer is active (non zero), and triggers (zeroes) now? */
if (netif->dhcp->t2_timeout-- == 1) {
DEBUGF(DHCP_DEBUG, ("dhcp_coarse_tmr(): t2 timeout"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_coarse_tmr(): t2 timeout"));
/* this clients' rebind timeout triggered */
dhcp_t2_timeout(netif);
/* timer is active (non zero), and triggers (zeroes) now */
} else if (netif->dhcp->t1_timeout-- == 1) {
DEBUGF(DHCP_DEBUG, ("dhcp_coarse_tmr(): t1 timeout"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_coarse_tmr(): t1 timeout"));
/* this clients' renewal timeout triggered */
dhcp_t1_timeout(netif);
}
@ -291,7 +298,7 @@ void dhcp_fine_tmr()
if (netif->dhcp != NULL) {
/* timer is active (non zero), and triggers (zeroes) now */
if (netif->dhcp->request_timeout-- == 1) {
DEBUGF(DHCP_DEBUG, ("dhcp_fine_tmr(): request timeout"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_fine_tmr(): request timeout"));
/* this clients' request timeout triggered */
dhcp_timeout(netif);
}
@ -313,24 +320,24 @@ void dhcp_fine_tmr()
static void dhcp_timeout(struct netif *netif)
{
struct dhcp *dhcp = netif->dhcp;
DEBUGF(DHCP_DEBUG, ("dhcp_timeout()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_timeout()"));
/* back-off period has passed, or server selection timed out */
if ((dhcp->state == DHCP_BACKING_OFF) || (dhcp->state == DHCP_SELECTING)) {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): restarting discovery"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_timeout(): restarting discovery"));
dhcp_discover(netif);
/* receiving the requested lease timed out */
} else if (dhcp->state == DHCP_REQUESTING) {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): REQUESTING, DHCP request timed out"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REQUESTING, DHCP request timed out"));
if (dhcp->tries <= 5) {
dhcp_select(netif);
} else {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): REQUESTING, releasing, restarting"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REQUESTING, releasing, restarting"));
dhcp_release(netif);
dhcp_discover(netif);
}
/* received no ARP reply for the offered address (which is good) */
} else if (dhcp->state == DHCP_CHECKING) {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): CHECKING, ARP request timed out"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): CHECKING, ARP request timed out"));
if (dhcp->tries <= 1) {
dhcp_check(netif);
/* no ARP replies on the offered address,
@ -342,17 +349,17 @@ static void dhcp_timeout(struct netif *netif)
}
/* did not get response to renew request? */
else if (dhcp->state == DHCP_RENEWING) {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): RENEWING, DHCP request timed out"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): RENEWING, DHCP request timed out"));
/* just retry renewal */
/* note that the rebind timer will eventually time-out if renew does not work */
dhcp_renew(netif);
/* did not get response to rebind request? */
} else if (dhcp->state == DHCP_REBINDING) {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): REBINDING, DHCP request timed out"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): REBINDING, DHCP request timed out"));
if (dhcp->tries <= 8) {
dhcp_rebind(netif);
} else {
DEBUGF(DHCP_DEBUG, ("dhcp_timeout(): RELEASING, DISCOVERING"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_timeout(): RELEASING, DISCOVERING"));
dhcp_release(netif);
dhcp_discover(netif);
}
@ -367,11 +374,11 @@ static void dhcp_timeout(struct netif *netif)
static void dhcp_t1_timeout(struct netif *netif)
{
struct dhcp *dhcp = netif->dhcp;
DEBUGF(DHCP_DEBUG, ("dhcp_t1_timeout()"));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_t1_timeout()"));
if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) {
/* just retry to renew */
/* note that the rebind timer will eventually time-out if renew does not work */
DEBUGF(DHCP_DEBUG, ("dhcp_t1_timeout(): must renew"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t1_timeout(): must renew"));
dhcp_renew(netif);
}
}
@ -383,10 +390,10 @@ static void dhcp_t1_timeout(struct netif *netif)
static void dhcp_t2_timeout(struct netif *netif)
{
struct dhcp *dhcp = netif->dhcp;
DEBUGF(DHCP_DEBUG, ("dhcp_t2_timeout()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t2_timeout()"));
if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) {
/* just retry to rebind */
DEBUGF(DHCP_DEBUG, ("dhcp_t2_timeout(): must rebind"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_t2_timeout(): must rebind"));
dhcp_rebind(netif);
}
}
@ -473,22 +480,22 @@ err_t dhcp_start(struct netif *netif)
err_t result = ERR_OK;
LWIP_ASSERT("netif != NULL", netif != NULL);
DEBUGF(DHCP_DEBUG, ("dhcp_start(netif=%p) %c%c%u", netif, netif->name[0], netif->name[1], netif->num));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_start(netif=%p) %c%c%u", netif, netif->name[0], netif->name[1], netif->num));
if (dhcp == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_start(): starting new DHCP client"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): starting new DHCP client"));
dhcp = mem_malloc(sizeof(struct dhcp));
if (dhcp == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_start(): could not allocate dhcp"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): could not allocate dhcp"));
netif->flags &= ~NETIF_FLAG_DHCP;
return ERR_MEM;
}
/* clear data structure */
memset(dhcp, 0, sizeof(struct dhcp));
DEBUGF(DHCP_DEBUG, ("dhcp_start(): allocated dhcp"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): allocated dhcp"));
dhcp->pcb = udp_new();
if (dhcp->pcb == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_start(): could not obtain pcb"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): could not obtain pcb"));
mem_free((void *)dhcp);
dhcp = NULL;
netif->flags &= ~NETIF_FLAG_DHCP;
@ -496,10 +503,10 @@ err_t dhcp_start(struct netif *netif)
}
/* store this dhcp client in the netif */
netif->dhcp = dhcp;
DEBUGF(DHCP_DEBUG, ("dhcp_start(): created new udp pcb"));
DEBUGF(DHCP_DEBUG, ("dhcp_start(): starting DHCP configuration"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): created new udp pcb"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): starting DHCP configuration"));
} else {
DEBUGF(DHCP_DEBUG, ("dhcp_start(): restarting DHCP configuration"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_start(): restarting DHCP configuration"));
}
/* (re)start the DHCP negotiation */
result = dhcp_discover(netif);
@ -526,19 +533,19 @@ void dhcp_inform(struct netif *netif)
err_t result = ERR_OK;
dhcp = mem_malloc(sizeof(struct dhcp));
if (dhcp == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_inform(): could not allocate dhcp"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_inform(): could not allocate dhcp"));
return;
}
memset(dhcp, 0, sizeof(struct dhcp));
DEBUGF(DHCP_DEBUG, ("dhcp_inform(): allocated dhcp"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_inform(): allocated dhcp"));
dhcp->pcb = udp_new();
if (dhcp->pcb == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_inform(): could not obtain pcb"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_inform(): could not obtain pcb"));
mem_free((void *)dhcp);
return;
}
DEBUGF(DHCP_DEBUG, ("dhcp_inform(): created new udp pcb"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_inform(): created new udp pcb"));
/* create and initialize the DHCP message header */
result = dhcp_create_request(netif);
if (result == ERR_OK) {
@ -578,15 +585,15 @@ void dhcp_inform(struct netif *netif)
*/
void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr)
{
DEBUGF(DHCP_DEBUG, ("dhcp_arp_reply()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_arp_reply()"));
/* is this DHCP client doing an ARP check? */
if ((netif->dhcp != NULL) && (netif->dhcp->state == DHCP_CHECKING)) {
DEBUGF(DHCP_DEBUG, ("dhcp_arp_reply(): CHECKING, arp reply for 0x%08lx", addr->addr));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_arp_reply(): CHECKING, arp reply for 0x%08lx", addr->addr));
/* did a host respond with the address we
were offered by the DHCP server? */
if (ip_addr_cmp(addr, &netif->dhcp->offered_ip_addr)) {
/* we will not accept the offered address */
DEBUGF(DHCP_DEBUG, ("dhcp_arp_reply(): arp reply matched with offered address, declining"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE | 1, ("dhcp_arp_reply(): arp reply matched with offered address, declining"));
dhcp_decline(netif);
}
}
@ -604,7 +611,7 @@ static err_t dhcp_decline(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result = ERR_OK;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_decline()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_decline()"));
dhcp_set_state(dhcp, DHCP_BACKING_OFF);
/* create and initialize the DHCP message header */
result = dhcp_create_request(netif);
@ -628,7 +635,7 @@ static err_t dhcp_decline(struct netif *netif)
dhcp->tries++;
msecs = 10*1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_decline(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_decline(): set request timeout %u msecs", msecs));
return result;
}
#endif
@ -643,7 +650,7 @@ static err_t dhcp_discover(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result = ERR_OK;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_discover()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_discover()"));
ip_addr_set(&dhcp->offered_ip_addr, IP_ADDR_ANY);
/* create and initialize the DHCP message header */
result = dhcp_create_request(netif);
@ -677,7 +684,7 @@ static err_t dhcp_discover(struct netif *netif)
dhcp->tries++;
msecs = dhcp->tries < 4 ? (dhcp->tries + 1) * 1000 : 10 * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_discover(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_discover(): set request timeout %u msecs", msecs));
dhcp_set_state(dhcp, DHCP_SELECTING);
return result;
}
@ -696,17 +703,17 @@ static void dhcp_bind(struct netif *netif)
/* temporary DHCP lease? */
if (dhcp->offered_t1_renew != 0xffffffffUL) {
/* set renewal period timer */
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): t1 renewal timer %lu secs", dhcp->offered_t1_renew));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_bind(): t1 renewal timer %lu secs", dhcp->offered_t1_renew));
dhcp->t1_timeout = (dhcp->offered_t1_renew + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
if (dhcp->t1_timeout == 0) dhcp->t1_timeout = 1;
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): set request timeout %u msecs", dhcp->offered_t1_renew*1000));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_bind(): set request timeout %u msecs", dhcp->offered_t1_renew*1000));
}
/* set renewal period timer */
if (dhcp->offered_t2_rebind != 0xffffffffUL) {
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): t2 rebind timer %lu secs", dhcp->offered_t2_rebind));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_bind(): t2 rebind timer %lu secs", dhcp->offered_t2_rebind));
dhcp->t2_timeout = (dhcp->offered_t2_rebind + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
if (dhcp->t2_timeout == 0) dhcp->t2_timeout = 1;
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): set request timeout %u msecs", dhcp->offered_t2_rebind*1000));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_bind(): set request timeout %u msecs", dhcp->offered_t2_rebind*1000));
}
/* copy offered network mask */
ip_addr_set(&sn_mask, &dhcp->offered_sn_mask);
@ -730,11 +737,11 @@ static void dhcp_bind(struct netif *netif)
gw_addr.addr |= htonl(0x00000001);
}
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): IP: 0x%08lx", dhcp->offered_ip_addr.addr));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): IP: 0x%08lx", dhcp->offered_ip_addr.addr));
netif_set_ipaddr(netif, &dhcp->offered_ip_addr);
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): SN: 0x%08lx", sn_mask.addr));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): SN: 0x%08lx", sn_mask.addr));
netif_set_netmask(netif, &sn_mask);
DEBUGF(DHCP_DEBUG, ("dhcp_bind(): GW: 0x%08lx", gw_addr.addr));
DEBUGF(DHCP_DEBUG | DBG_STATE, ("dhcp_bind(): GW: 0x%08lx", gw_addr.addr));
netif_set_gw(netif, &gw_addr);
/* netif is now bound to DHCP leased address */
dhcp_set_state(dhcp, DHCP_BOUND);
@ -750,7 +757,7 @@ err_t dhcp_renew(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_renew()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_renew()"));
dhcp_set_state(dhcp, DHCP_RENEWING);
/* create and initialize the DHCP message header */
@ -787,7 +794,7 @@ err_t dhcp_renew(struct netif *netif)
/* back-off on retries, but to a maximum of 20 seconds */
msecs = dhcp->tries < 10 ? dhcp->tries * 2000 : 20 * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_renew(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_renew(): set request timeout %u msecs", msecs));
return result;
}
@ -801,7 +808,7 @@ static err_t dhcp_rebind(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_rebind()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_rebind()"));
dhcp_set_state(dhcp, DHCP_REBINDING);
/* create and initialize the DHCP message header */
@ -836,7 +843,7 @@ static err_t dhcp_rebind(struct netif *netif)
dhcp->tries++;
msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_rebind(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_rebind(): set request timeout %u msecs", msecs));
return result;
}
@ -850,7 +857,7 @@ static err_t dhcp_release(struct netif *netif)
struct dhcp *dhcp = netif->dhcp;
err_t result;
u16_t msecs;
DEBUGF(DHCP_DEBUG, ("dhcp_release()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_release()"));
/* idle DHCP client */
dhcp_set_state(dhcp, DHCP_OFF);
@ -872,7 +879,7 @@ static err_t dhcp_release(struct netif *netif)
dhcp->tries++;
msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
DEBUGF(DHCP_DEBUG, ("dhcp_release(): set request timeout %u msecs", msecs));
DEBUGF(DHCP_DEBUG | DBG_TRACE | DBG_STATE, ("dhcp_release(): set request timeout %u msecs", msecs));
/* remove IP address from interface */
netif_set_ipaddr(netif, IP_ADDR_ANY);
netif_set_gw(netif, IP_ADDR_ANY);
@ -888,7 +895,7 @@ static err_t dhcp_release(struct netif *netif)
void dhcp_stop(struct netif *netif)
{
struct dhcp *dhcp = netif->dhcp;
DEBUGF(DHCP_DEBUG, ("dhcp_stop()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_stop()"));
/* netif is DHCP configured? */
if (dhcp != NULL)
{
@ -987,14 +994,14 @@ static err_t dhcp_unfold_reply(struct dhcp *dhcp)
dhcp->options_in = mem_malloc(dhcp->options_in_len);
if (dhcp->options_in == NULL)
{
DEBUGF(DHCP_DEBUG, ("dhcp_unfold_reply(): could not allocate dhcp->options"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->options"));
return ERR_MEM;
}
}
dhcp->msg_in = mem_malloc(sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN);
if (dhcp->msg_in == NULL)
{
DEBUGF(DHCP_DEBUG, ("dhcp_unfold_reply(): could not allocate dhcp->msg_in"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->msg_in"));
mem_free((void *)dhcp->options_in);
dhcp->options_in = NULL;
return ERR_MEM;
@ -1013,7 +1020,7 @@ static err_t dhcp_unfold_reply(struct dhcp *dhcp)
j = 0;
}
}
DEBUGF(DHCP_DEBUG, ("dhcp_unfold_reply(): copied %u bytes into dhcp->msg_in[]", i));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_unfold_reply(): copied %u bytes into dhcp->msg_in[]", i));
if (dhcp->options_in != NULL) {
ptr = (u8_t *)dhcp->options_in;
/* proceed through options */
@ -1026,7 +1033,7 @@ static err_t dhcp_unfold_reply(struct dhcp *dhcp)
j = 0;
}
}
DEBUGF(DHCP_DEBUG, ("dhcp_unfold_reply(): copied %u bytes to dhcp->options_in[]", i));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_unfold_reply(): copied %u bytes to dhcp->options_in[]", i));
}
return ERR_OK;
}
@ -1062,18 +1069,18 @@ static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_
u8_t *options_ptr;
u8_t msg_type;
u8_t i;
DEBUGF(DHCP_DEBUG, ("dhcp_recv()"));
DEBUGF(DHCP_DEBUG, ("pbuf->len = %u", p->len));
DEBUGF(DHCP_DEBUG, ("pbuf->tot_len = %u", p->tot_len));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("dhcp_recv()"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("pbuf->len = %u", p->len));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("pbuf->tot_len = %u", p->tot_len));
dhcp->p = p;
if (reply_msg->op != DHCP_BOOTREPLY) {
DEBUGF(DHCP_DEBUG, ("not a DHCP reply message, but type %u", reply_msg->op));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("not a DHCP reply message, but type %u", reply_msg->op));
pbuf_free(p);
}
/* iterate through hardware address and match against DHCP message */
for (i = 0; i < netif->hwaddr_len; i++) {
if (netif->hwaddr[i] != reply_msg->chaddr[i]) {
DEBUGF(DHCP_DEBUG, ("netif->hwaddr[%u]==%02x != reply_msg->chaddr[%u]==%02x",
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("netif->hwaddr[%u]==%02x != reply_msg->chaddr[%u]==%02x",
i, netif->hwaddr[i], i, reply_msg->chaddr[i]));
pbuf_free(p);
return;
@ -1081,22 +1088,22 @@ static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_
}
/* match transaction ID against what we expected */
if (ntohl(reply_msg->xid) != dhcp->xid) {
DEBUGF(DHCP_DEBUG, ("transaction id mismatch"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("transaction id mismatch"));
pbuf_free(p);
return;
}
/* option fields could be unfold? */
if (dhcp_unfold_reply(dhcp) != ERR_OK) {
DEBUGF(DHCP_DEBUG, ("problem unfolding DHCP message - too short on memory?"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("problem unfolding DHCP message - too short on memory?"));
pbuf_free(p);
return;
}
DEBUGF(DHCP_DEBUG, ("searching DHCP_OPTION_MESSAGE_TYPE"));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("searching DHCP_OPTION_MESSAGE_TYPE"));
/* obtain pointer to DHCP message type */
options_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_MESSAGE_TYPE);
if (options_ptr == NULL) {
DEBUGF(DHCP_DEBUG, ("DHCP_OPTION_MESSAGE_TYPE option not found"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_OPTION_MESSAGE_TYPE option not found"));
pbuf_free(p);
return;
}
@ -1105,7 +1112,7 @@ static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_
msg_type = dhcp_get_option_byte(options_ptr + 2);
/* message type is DHCP ACK? */
if (msg_type == DHCP_ACK) {
DEBUGF(DHCP_DEBUG, ("DHCP_ACK received"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_ACK received"));
/* in requesting state? */
if (dhcp->state == DHCP_REQUESTING) {
dhcp_handle_ack(netif);
@ -1128,13 +1135,13 @@ static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_
else if ((msg_type == DHCP_NAK) &&
((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REQUESTING) ||
(dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING ))) {
DEBUGF(DHCP_DEBUG, ("DHCP_NAK received"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_NAK received"));
dhcp->request_timeout = 0;
dhcp_handle_nak(netif);
}
/* received a DHCP_OFFER in DHCP_SELECTING state? */
else if ((msg_type == DHCP_OFFER) && (dhcp->state == DHCP_SELECTING)) {
DEBUGF(DHCP_DEBUG, ("DHCP_OFFER received in DHCP_SELECTING state"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("DHCP_OFFER received in DHCP_SELECTING state"));
dhcp->request_timeout = 0;
/* remember offered lease */
dhcp_handle_offer(netif);
@ -1151,7 +1158,7 @@ static err_t dhcp_create_request(struct netif *netif)
LWIP_ASSERT("dhcp_create_request: dhcp->msg_out == NULL", dhcp->msg_out == NULL);
dhcp->p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp_msg), PBUF_RAM);
if (dhcp->p_out == NULL) {
DEBUGF(DHCP_DEBUG, ("dhcp_create_request(): could not allocate pbuf"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("dhcp_create_request(): could not allocate pbuf"));
return ERR_MEM;
}
/* give unique transaction identifier to this request */
@ -1239,14 +1246,14 @@ static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type)
/* DEBUGF(DHCP_DEBUG, ("msg_offset=%u, q->len=%u", msg_offset, q->len)); */
/* are the sname and/or file field overloaded with options? */
if (options[offset] == DHCP_OPTION_OVERLOAD) {
DEBUGF(DHCP_DEBUG, ("overloaded message detected"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 2, ("overloaded message detected"));
/* skip option type and length */
offset += 2;
overload = options[offset++];
}
/* requested option found */
else if (options[offset] == option_type) {
DEBUGF(DHCP_DEBUG, ("option found at offset %u in options", offset));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("option found at offset %u in options", offset));
return &options[offset];
/* skip option */
} else {
@ -1261,16 +1268,16 @@ static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type)
if (overload != DHCP_OVERLOAD_NONE) {
u16_t field_len;
if (overload == DHCP_OVERLOAD_FILE) {
DEBUGF(DHCP_DEBUG, ("overloaded file field"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded file field"));
options = (u8_t *)&dhcp->msg_in->file;
field_len = DHCP_FILE_LEN;
} else if (overload == DHCP_OVERLOAD_SNAME) {
DEBUGF(DHCP_DEBUG, ("overloaded sname field"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded sname field"));
options = (u8_t *)&dhcp->msg_in->sname;
field_len = DHCP_SNAME_LEN;
/* TODO: check if else if () is necessary */
} else {
DEBUGF(DHCP_DEBUG, ("overloaded sname and file field"));
DEBUGF(DHCP_DEBUG | DBG_TRACE | 1, ("overloaded sname and file field"));
options = (u8_t *)&dhcp->msg_in->sname;
field_len = DHCP_FILE_LEN + DHCP_SNAME_LEN;
}
@ -1279,11 +1286,11 @@ static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type)
/* at least 1 byte to read and no end marker */
while ((offset < field_len) && (options[offset] != DHCP_OPTION_END)) {
if (options[offset] == option_type) {
DEBUGF(DHCP_DEBUG, ("option found at offset=%u", offset));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("option found at offset=%u", offset));
return &options[offset];
/* skip option */
} else {
DEBUGF(DHCP_DEBUG, ("skipping option %u", options[offset]));
DEBUGF(DHCP_DEBUG | DBG_TRACE, ("skipping option %u", options[offset]));
/* skip option type */
offset++;
offset += 1 + options[offset];

24
src/core/ipv4/ip.c
View File

@ -236,7 +236,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
/* identify the IP header */
iphdr = p->payload;
if(IPH_V(iphdr) != 4) {
DEBUGF(IP_DEBUG, ("IP packet dropped due to bad version number %d\n", IPH_V(iphdr)));
DEBUGF(IP_DEBUG | 1, ("IP packet dropped due to bad version number %d\n", IPH_V(iphdr)));
#if IP_DEBUG
ip_debug_print(p);
#endif /* IP_DEBUG */
@ -255,7 +255,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
/* header length exceeds first pbuf length? */
if(iphdrlen > p->len) {
DEBUGF(IP_DEBUG, ("IP header (len %u) does not fit in first pbuf (len %u), IP packet droppped.\n",
DEBUGF(IP_DEBUG | 2, ("IP header (len %u) does not fit in first pbuf (len %u), IP packet droppped.\n",
iphdrlen, p->len));
/* free (drop) packet pbufs */
pbuf_free(p);
@ -270,7 +270,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
/* verify checksum */
if(inet_chksum(iphdr, iphdrlen) != 0) {
DEBUGF(IP_DEBUG, ("Checksum (0x%x) failed, IP packet dropped.\n", inet_chksum(iphdr, iphdrlen)));
DEBUGF(IP_DEBUG | 2, ("Checksum (0x%x) failed, IP packet dropped.\n", inet_chksum(iphdr, iphdrlen)));
#if IP_DEBUG
ip_debug_print(p);
#endif /* IP_DEBUG */
@ -320,10 +320,10 @@ ip_input(struct pbuf *p, struct netif *inp) {
if(netif == NULL) {
/* remote port is DHCP server? */
if(IPH_PROTO(iphdr) == IP_PROTO_UDP) {
DEBUGF(IP_DEBUG, ("ip_input: UDP packet to DHCP client port %u\n",
DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: UDP packet to DHCP client port %u\n",
ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest)));
if (ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdrlen))->dest) == DHCP_CLIENT_PORT) {
DEBUGF(IP_DEBUG, ("ip_input: DHCP packet accepted.\n"));
DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: DHCP packet accepted.\n"));
netif = inp;
}
}
@ -332,7 +332,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
/* packet not for us? */
if(netif == NULL) {
/* packet not for us, route or discard */
DEBUGF(IP_DEBUG, ("ip_input: packet not for us.\n"));
DEBUGF(IP_DEBUG | DBG_TRACE | 1, ("ip_input: packet not for us.\n"));
#if IP_FORWARD
/* non-broadcast packet? */
if(!ip_addr_isbroadcast(&(iphdr->dest), &(inp->netmask))) {
@ -360,7 +360,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
#else /* IP_REASSEMBLY */
if((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) {
pbuf_free(p);
DEBUGF(IP_DEBUG, ("IP packet dropped since it was fragmented (0x%x) (while IP_REASSEMBLY == 0).\n",
DEBUGF(IP_DEBUG | 2, ("IP packet dropped since it was fragmented (0x%x) (while IP_REASSEMBLY == 0).\n",
ntohs(IPH_OFFSET(iphdr))));
#ifdef IP_STATS
++lwip_stats.ip.opterr;
@ -372,8 +372,8 @@ ip_input(struct pbuf *p, struct netif *inp) {
#endif /* IP_REASSEMBLY */
#if IP_OPTIONS == 0
if(iphdrlen > IP_HLEN) {
DEBUGF(IP_DEBUG, ("IP packet dropped since there were IP options (while IP_OPTIONS == 0).\n"));
if (iphdrlen > IP_HLEN) {
DEBUGF(IP_DEBUG | 2, ("IP packet dropped since there were IP options (while IP_OPTIONS == 0).\n"));
pbuf_free(p);
#ifdef IP_STATS
++lwip_stats.ip.opterr;
@ -417,7 +417,7 @@ ip_input(struct pbuf *p, struct netif *inp) {
}
pbuf_free(p);
DEBUGF(IP_DEBUG, ("Unsupported transportation protocol %d\n", IPH_PROTO(iphdr)));
DEBUGF(IP_DEBUG | 2, ("Unsupported transport protocol %d\n", IPH_PROTO(iphdr)));
#ifdef IP_STATS
++lwip_stats.ip.proterr;
@ -450,7 +450,7 @@ ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
if(dest != IP_HDRINCL) {
if(pbuf_header(p, IP_HLEN)) {
DEBUGF(IP_DEBUG, ("ip_output: not enough room for IP header in pbuf\n"));
DEBUGF(IP_DEBUG | 2, ("ip_output: not enough room for IP header in pbuf\n"));
#ifdef IP_STATS
++lwip_stats.ip.err;
@ -517,7 +517,7 @@ ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
struct netif *netif;
if((netif = ip_route(dest)) == NULL) {
DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%lx\n", dest->addr));
DEBUGF(IP_DEBUG | 2, ("ip_output: No route to 0x%lx\n", dest->addr));
#ifdef IP_STATS
++lwip_stats.ip.rterr;

11
src/core/netif.c
View File

@ -1,3 +1,9 @@
/**
* @file
*
* lwIP network interface abstraction
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
@ -132,8 +138,9 @@ void netif_remove(struct netif * netif)
if(tmpNetif == NULL)
return; /* we didn't find any netif today */
}
if(netif_default == netif)
/* this netif is default? */
if (netif_default == netif)
/* reset default netif */
netif_default = NULL;
DEBUGF(NETIF_DEBUG, ("netif_remove: removed netif"));

117
src/core/pbuf.c
View File

@ -1,3 +1,7 @@
/**
* @file
* Packet buffers/chains management module
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.
@ -88,7 +92,7 @@ pbuf_init(void)
lwip_stats.pbuf.avail = PBUF_POOL_SIZE;
#endif /* PBUF_STATS */
/* Set up ->next pointers to link the pbufs of the pool together. */
/* Set up ->next pointers to link the pbufs of the pool together */
p = pbuf_pool;
for(i = 0; i < PBUF_POOL_SIZE; ++i) {
@ -100,7 +104,7 @@ pbuf_init(void)
}
/* The ->next pointer of last pbuf is NULL to indicate that there
are no more pbufs in the pool. */
are no more pbufs in the pool */
q->next = NULL;
#if !SYS_LIGHTWEIGHT_PROT
@ -219,6 +223,7 @@ pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag)
u16_t offset;
s32_t rsize;
/* determine header offset */
offset = 0;
switch(l) {
case PBUF_TRANSPORT:
@ -239,7 +244,7 @@ pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag)
switch(flag) {
case PBUF_POOL:
/* Allocate head of pbuf chain into p. */
/* allocate head of pbuf chain into p */
p = pbuf_pool_alloc();
if(p == NULL) {
#ifdef PBUF_STATS
@ -249,19 +254,18 @@ pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag)
}
p->next = NULL;
/* Set the payload pointer so that it points offset bytes into
pbuf data memory. */
/* make the payload pointer points offset bytes into pbuf data memory */
p->payload = MEM_ALIGN((void *)((u8_t *)p + (sizeof(struct pbuf) + offset)));
/* The total length of the pbuf is the requested size. */
/* the total length of the pbuf is the requested size */
p->tot_len = size;
/* Set the length of the first pbuf is the chain. */
/* set the length of the first pbuf is the chain */
p->len = size > PBUF_POOL_BUFSIZE - offset? PBUF_POOL_BUFSIZE - offset: size;
p->flags = PBUF_FLAG_POOL;
/* Allocate the tail of the pbuf chain. */
/* allocate the tail of the pbuf chain. */
r = p;
rsize = size - p->len;
while(rsize > 0) {
@ -304,7 +308,7 @@ pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag)
LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned",
((u32_t)p->payload % MEM_ALIGNMENT) == 0);
break;
/* pbuf references existing ROM payload? */
/* pbuf references existing (static constant) ROM payload? */
case PBUF_ROM:
/* pbuf references existing (externally allocated) RAM payload? */
case PBUF_REF:
@ -318,10 +322,7 @@ pbuf_alloc(pbuf_layer l, u16_t size, pbuf_flag flag)
p->payload = NULL;
p->len = p->tot_len = size;
p->next = NULL;
if (flag == PBUF_ROM)
p->flags = PBUF_FLAG_ROM;
else
p->flags = PBUF_FLAG_REF;
p->flags = (flag == PBUF_ROM? PBUF_FLAG_ROM: PBUF_FLAG_REF);
break;
default:
LWIP_ASSERT("pbuf_alloc: erroneous flag", 0);
@ -426,7 +427,6 @@ pbuf_realloc(struct pbuf *p, u16_t size)
p->flags == PBUF_FLAG_RAM ||
p->flags == PBUF_FLAG_REF);
if(p->tot_len <= size) {
return;
}
@ -487,23 +487,25 @@ pbuf_realloc(struct pbuf *p, u16_t size)
pbuf_refresh();
}
/*-----------------------------------------------------------------------------------*/
/* pbuf_header():
*
/**
* Decreases the header size by the given amount.
*
* Adjusts the ->payload pointer so that space for a header appears in
* the pbuf. Also, the ->tot_len and ->len fields are adjusted.
*
* Decreases the header size by the given amount.
* Using a negative value increases the header size.
* @param hdr_decrement Number of bytes to decrement header size.
* (Using a negative value increases the header size.)
*
* @return 1 on failure, 0 on succes.
*/
/*-----------------------------------------------------------------------------------*/
u8_t
pbuf_header(struct pbuf *p, s16_t header_size)
{
void *payload;
if(p->flags == PBUF_FLAG_ROM ||
p->flags == PBUF_FLAG_REF) {
/* referencing pbufs cannot be realloc()ed */
if (p->flags == PBUF_FLAG_ROM ||
p->flags == PBUF_FLAG_REF) {
return 1;
}
@ -512,10 +514,12 @@ pbuf_header(struct pbuf *p, s16_t header_size)
DEBUGF(PBUF_DEBUG, ("pbuf_header: old %p new %p (%d)\n", payload, p->payload, header_size));
/* */
if((u8_t *)p->payload < (u8_t *)p + sizeof(struct pbuf)) {
DEBUGF(PBUF_DEBUG | 2, ("pbuf_header: failed %p %p\n",
DEBUGF(PBUF_DEBUG | 2, ("pbuf_header: failed as %p < %p\n",
(u8_t *)p->payload,
(u8_t *)p + sizeof(struct pbuf)));
(u8_t *)p + sizeof(struct pbuf)));\
/* restore old payload pointer */
p->payload = payload;
return 1;
}
@ -539,7 +543,8 @@ pbuf_free(struct pbuf *p)
u8_t count = 0;
SYS_ARCH_DECL_PROTECT(old_level);
if(p == NULL) {
if (p == NULL) {
DEBUGF(PBUF_DEBUG | DBG_TRACE | 2, ("pbuf_free(p==NULL) was called.\n"));
return 0;
}
@ -551,43 +556,39 @@ pbuf_free(struct pbuf *p)
p->flags == PBUF_FLAG_REF );
/* Since decrementing ref cannot be guarranteed to be a single machine operation
we must protect it. Also, the later test of ref must be protected.
*/
* we must protect it. Also, the later test of ref must be protected.
*/
SYS_ARCH_PROTECT(old_level);
/* Decrement reference count. */
/* decrement individual reference count for each pbufs in chain */
for (q = p; q != NULL; q = q->next) {
LWIP_ASSERT("pbuf_free: q->ref > 0", q->ref > 0);
q->ref--;
}
}
/* If reference count == 0, actually deallocate pbuf. */
if(p->ref == 0) {
SYS_ARCH_UNPROTECT(old_level);
/* if reference count == 0, actually deallocate pbuf */
if (p->ref == 0) {
SYS_ARCH_UNPROTECT(old_level);
while(p != NULL) {
while (p != NULL) {
/* remember next in chain */
q = p->next;
/* this is a pbuf from the pool? */
if(p->flags == PBUF_FLAG_POOL) {
if (p->flags == PBUF_FLAG_POOL) {
p->len = p->tot_len = PBUF_POOL_BUFSIZE;
p->payload = (void *)((u8_t *)p + sizeof(struct pbuf));
q = p->next;
PBUF_POOL_FREE(p);
/* not a pbuf from the pool */
/* RAM/ROM referencing pbuf */
} else if (p->flags == PBUF_FLAG_ROM || p->flags == PBUF_FLAG_REF) {
memp_freep(MEMP_PBUF, p);
/* pbuf with data */
} else {
mem_free(p);
}
else {
if(p->flags == PBUF_FLAG_ROM || p->flags == PBUF_FLAG_REF) {
q = p->next;
memp_freep(MEMP_PBUF, p);
}
else {
q = p->next;
mem_free(p);
}
}
/* next in chain */
p = q;
/* Only free the next one in a chain if it's reference count is 0.
This allows buffer chains to have multiple headers pointing to them. */
if (p)
if (p != NULL)
{
p->ref--;
if (p->ref > 0)
@ -597,10 +598,8 @@ pbuf_free(struct pbuf *p)
++count;
}
pbuf_refresh();
}
else
SYS_ARCH_UNPROTECT(old_level);
} else
SYS_ARCH_UNPROTECT(old_level);
PERF_STOP("pbuf_free");
return count;
@ -682,22 +681,26 @@ pbuf_chain(struct pbuf *h, struct pbuf *t)
p->next = t;
h->tot_len += t->tot_len;
}
/*-----------------------------------------------------------------------------------*/
/* pbuf_dechain():
/**
* Dechains a pbuf from any succeeding pbufs in the chain.
*
* Adjusts the ->tot_len field of the pbuf and returns the tail (if
* any) of the pbuf chain.
* Makes p->tot_len field equal to p->len.
* @param p pbuf to dechain
* @return remainder (if any) of the pbuf chain.
*/
/*-----------------------------------------------------------------------------------*/
struct pbuf *
pbuf_dechain(struct pbuf *p)
{
struct pbuf *q;
q = p->next;
/* pbuf has successor in chain? */
if (q != NULL) {
/* LW: shouldn't q->tot_len be already exactly this? (make this an assert?) */
q->tot_len = p->tot_len - p->len;
}
/* decouple pbuf from remainder */
p->tot_len = p->len;
p->next = NULL;
return q;

6
src/core/tcp.c
View File

@ -1,3 +1,9 @@
/**
* @file
*
* Transmission Control Protocol for IP
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.

6
src/core/tcp_in.c
View File

@ -1,3 +1,9 @@
/**
* @file
*
* Transmission Control Protocol, incoming traffic
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.

5
src/core/tcp_out.c
View File

@ -1,3 +1,8 @@
/**
* @file
*
* Transmission Control Protocol, outgoing traffic
*/
/*
* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
* All rights reserved.

6
src/include/lwip/debug.h
View File

@ -42,9 +42,9 @@
*/
#define DBG_LEVEL_OFF 0
#define DBG_LEVEL_WARNING 1
#define DBG_LEVEL_SERIOUS 2
#define DBG_LEVEL_SEVERE 3
#define DBG_LEVEL_WARNING 1 /* bad checksums, dropped packets, ... */
#define DBG_LEVEL_SERIOUS 2 /* memory allocation failures, ... */
#define DBG_LEVEL_SEVERE 3 /* */
#define DBG_MASK_LEVEL 3
/** flag for DEBUGF to enable the debug message */

2
src/include/lwip/opt.h
View File

@ -174,7 +174,7 @@ a lot of data that needs to be copied, this should be set high. */
IP packets across network interfaces. If you are going to run lwIP
on a device with only one network interface, define this to 0. */
#ifndef IP_FORWARD
#define IP_FORWARD 1
#define IP_FORWARD 0
#endif
/* If defined to 1, IP options are allowed (but not parsed). If

12
src/netif/etharp.c
View File

@ -650,12 +650,12 @@ struct pbuf *etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pb
for(i = 0; i < ARP_TABLE_SIZE; ++i) {
if(ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) {
if (arp_table[i].state == ETHARP_STATE_PENDING) {
DEBUGF(ETHARP_DEBUG, ("etharp_query: requested IP already pending\n"));
DEBUGF(ETHARP_DEBUG | DBG_TRACE | DBG_STATE, ("etharp_query: requested IP already pending as entry %u\n", i));
/* break out of for-loop */
break;
}
else if (arp_table[i].state == ETHARP_STATE_STABLE) {
DEBUGF(ETHARP_DEBUG, ("etharp_query: requested IP already stable\n"));
DEBUGF(ETHARP_DEBUG | DBG_TRACE | DBG_STATE, ("etharp_query: requested IP already stable as entry %u\n", i));
return NULL;
}
}
@ -663,16 +663,16 @@ struct pbuf *etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pb
/* queried address not yet pending in ARP table? */
if (i == ARP_TABLE_SIZE)
{
DEBUGF(ETHARP_DEBUG, ("etharp_query: IP address non-pending\n"));
DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_query: IP address not found in ARP table\n"));
/* find an available entry */
i = find_arp_entry();
/* bail out if no ARP entries are available */
if(i == ARP_TABLE_SIZE)
{
DEBUGF(ETHARP_DEBUG, ("etharp_query: no more ARP table entries available.\n"));
DEBUGF(ETHARP_DEBUG | 2, ("etharp_query: no more ARP entries available.\n"));
return NULL;
}
DEBUGF(ETHARP_DEBUG, ("etharp_query: created ARP table entry.\n"));
DEBUGF(ETHARP_DEBUG, ("etharp_query: created ARP table entry %u.\n", i));
/* i is available, create ARP entry */
ip_addr_set(&arp_table[i].ipaddr, ipaddr);
arp_table[i].ctime = 0;
@ -690,7 +690,7 @@ struct pbuf *etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pb
pbuf_ref_chain(q);
/* remember pbuf to queue, if any */
arp_table[i].p = q;
DEBUGF(ETHARP_DEBUG, ("etharp_query: queued packet on ARP entry.\n"));
DEBUGF(ETHARP_DEBUG, ("etharp_query: queued packet %p on ARP entry %u.\n", (void *)q, i));
}
#endif
/* allocate a pbuf for the outgoing ARP request packet */