mirror/lwip
1
0
Fork 0
mirror of https://github.com/lwip-tcpip/lwip.git synced 2024-07-07 13:29:19 +00:00
Code Issues Packages Projects Releases Wiki Activity

Another try to fix bug #49264: Crash Error when LWIP_SOCKET_OFFSET is in use

Browse Source
This commit is contained in:
Dirk Ziegelmeier 2016-10-04 14:05:56 +02:00
parent bef7873042
commit 95754ba95a
1 changed files with 24 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
src/api/sockets.c
View File

@ -266,8 +266,8 @@ union sockaddr_aligned {
/* This is to keep track of IP_ADD_MEMBERSHIP calls to drop the membership when
a socket is closed */
struct lwip_socket_multicast_pair {
/** the socket (+1 to not require initialization) */
int sa;
/** the socket */
struct lwip_sock* sock;
/** the interface address */
ip4_addr_t if_addr;
/** the group address */
@ -2730,14 +2730,16 @@ lwip_fcntl(int s, int cmd, int val)
static int
lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr)
{
/* s+1 is stored in the array to prevent having to initialize the array
(default initialization is to 0) */
int sa = s + 1 - LWIP_SOCKET_OFFSET;
struct lwip_sock *sock = get_socket(s);
int i;
if (!sock) {
return 0;
}
for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) {
if (socket_ipv4_multicast_memberships[i].sa == 0) {
socket_ipv4_multicast_memberships[i].sa = sa;
if (socket_ipv4_multicast_memberships[i].sock == NULL) {
socket_ipv4_multicast_memberships[i].sock = sock;
ip4_addr_copy(socket_ipv4_multicast_memberships[i].if_addr, *if_addr);
ip4_addr_copy(socket_ipv4_multicast_memberships[i].multi_addr, *multi_addr);
return 1;
@ -2754,16 +2756,18 @@ lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr
static void
lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr)
{
/* s+1 is stored in the array to prevent having to initialize the array
(default initialization is to 0) */
int sa = s + 1 - LWIP_SOCKET_OFFSET;
struct lwip_sock *sock = get_socket(s);
int i;
if (!sock) {
return;
}
for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) {
if ((socket_ipv4_multicast_memberships[i].sa == sa) &&
if ((socket_ipv4_multicast_memberships[i].sock == sock) &&
ip4_addr_cmp(&socket_ipv4_multicast_memberships[i].if_addr, if_addr) &&
ip4_addr_cmp(&socket_ipv4_multicast_memberships[i].multi_addr, multi_addr)) {
socket_ipv4_multicast_memberships[i].sa = 0;
socket_ipv4_multicast_memberships[i].sock = NULL;
ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr);
ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr);
return;
@ -2775,21 +2779,22 @@ lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_ad
*
* ATTENTION: this function is NOT called from tcpip_thread (or under CORE_LOCK).
*/
static void lwip_socket_drop_registered_memberships(int s)
static void
lwip_socket_drop_registered_memberships(int s)
{
/* s+1 is stored in the array to prevent having to initialize the array
(default initialization is to 0) */
int sa = s + 1 - LWIP_SOCKET_OFFSET;
struct lwip_sock *sock = get_socket(s);
int i;
LWIP_ASSERT("socket has no netconn", sockets[s].conn != NULL);
if (!sock) {
return;
}
for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) {
if (socket_ipv4_multicast_memberships[i].sa == sa) {
if (socket_ipv4_multicast_memberships[i].sock == sock) {
ip_addr_t multi_addr, if_addr;
ip_addr_copy_from_ip4(multi_addr, socket_ipv4_multicast_memberships[i].multi_addr);
ip_addr_copy_from_ip4(if_addr, socket_ipv4_multicast_memberships[i].if_addr);
socket_ipv4_multicast_memberships[i].sa = 0;
socket_ipv4_multicast_memberships[i].sock = NULL;
ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr);
ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr);