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fixed bug #40753 (re-bind UDP pcbs on change of IP address)

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This commit is contained in:
sg 2015-02-26 22:17:30 +01:00
parent 0d1606ff23
commit 99dd78964a
4 changed files with 32 additions and 1 deletions
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3
CHANGELOG
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@ -6,6 +6,9 @@ HISTORY
++ New features:
2015-02-22: patch by TabascoEye
* netif.c, udp.h/.c: fixed bug #40753 (re-bind UDP pcbs on change of IP address)
2015-02-22: chrysn, Simon Goldschmidt
* *.*: Changed nearly all functions taking 'ip(X)_addr_t' pointer to take
const pointers (changed user callbacks: raw_recv_fn, udp_recv_fn; changed

8
src/core/netif.c
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@ -390,9 +390,11 @@ netif_set_ipaddr(struct netif *netif, const ip_addr_t *ipaddr)
#if LWIP_TCP
struct tcp_pcb *pcb;
struct tcp_pcb_listen *lpcb;
#endif /* LWIP_TCP */
/* address is actually being changed? */
if (ipaddr && (ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0) {
#if LWIP_TCP
/* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_STATE, ("netif_set_ipaddr: netif address being changed\n"));
pcb = tcp_active_pcbs;
@ -422,8 +424,12 @@ netif_set_ipaddr(struct netif *netif, const ip_addr_t *ipaddr)
ip_addr_set(ipX_2_ip(&lpcb->local_ip), ipaddr);
}
}
#endif /* LWIP_TCP */
#if LWIP_UDP
udp_netif_ipv4_addr_changed(&netif->ip_addr, ipaddr);
#endif /* LWIP_UDP */
}
#endif
snmp_delete_ipaddridx_tree(netif);
snmp_delete_iprteidx_tree(0,netif);
/* set new IP address to netif */

20
src/core/udp.c
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@ -1151,6 +1151,26 @@ udp_new_ip6(void)
}
#endif /* LWIP_IPV6 */
/** This function is called from netif.c when address is changed
*
* @param old_addr IPv4 address of the netif before change
* @param new_addr IPv4 address of the netif after change
*/
void udp_netif_ipv4_addr_changed(const ip_addr_t* old_addr, const ip_addr_t* new_addr)
{
struct udp_pcb* upcb;
for (upcb = udp_pcbs; upcb != NULL; upcb = upcb->next) {
/* PCB bound to current local interface address? */
if ((!(ip_addr_isany(ipX_2_ip(&upcb->local_ip)))) &&
(ip_addr_cmp(ipX_2_ip(&upcb->local_ip), old_addr))) {
/* The PCB is bound to the old ipaddr and
* is set to bound to the new one instead */
ip_addr_set(ipX_2_ip(&upcb->local_ip), new_addr);
}
}
}
#if UDP_DEBUG
/**
* Print UDP header information for debug purposes.

2
src/include/lwip/udp.h
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@ -221,6 +221,8 @@ void udp_debug_print(struct udp_hdr *udphdr);
#define udp_debug_print(udphdr)
#endif
void udp_netif_ipv4_addr_changed(const ip_addr_t* old_addr, const ip_addr_t* new_addr);
#ifdef __cplusplus
}
#endif