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pcpserver.c: send ANNOUNCE when IP changed 

see #254
This commit is contained in:
Thomas Bernard 2017-11-27 23:04:22 +01:00
parent cc0fad78d7
commit 7492fe42c2
3 changed files with 65 additions and 3 deletions
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6
miniupnpd/miniupnpd.c
View File

@ -2064,7 +2064,11 @@ main(int argc, char * * argv)
#ifdef ENABLE_PCP
if(GETFLAG(ENABLENATPMPMASK))
{
PCPPublicAddressChanged();
#ifdef ENABLE_IPV6
PCPPublicAddressChanged(snatpmp, addr_count, spcp_v6);
#else /* IPv4 only */
PCPPublicAddressChanged(snatpmp, addr_count);
#endif
}
#endif
should_send_public_address_change_notif = 0;

56
miniupnpd/pcpserver.c
View File

@ -1636,11 +1636,65 @@ int OpenAndConfPCPv6Socket(void)
}
#endif /*ENABLE_IPV6*/
void PCPPublicAddressChanged(void)
#ifdef ENABLE_IPV6
static void PCPSendUnsolicitedAnnounce(int * sockets, int n_sockets, int socket6)
#else /* IPv4 only */
static void PCPSendUnsolicitedAnnounce(int * sockets, int n_sockets)
#endif
{
int i;
unsigned char buff[PCP_MIN_LEN];
pcp_info_t info;
ssize_t len;
struct sockaddr_in addr;
#ifdef ENABLE_IPV6
struct sockaddr_in6 addr6;
#endif /* ENABLE_IPV6 */
/* this is an Unsolicited ANNOUNCE response */
info.version = this_server_info.server_version;
info.opcode = PCP_OPCODE_ANNOUNCE;
info.result_code = PCP_SUCCESS;
info.lifetime = 0;
createPCPResponse(buff, &info);
/* Multicast PCP restart announcements are sent to
* 224.0.0.1:5350 and/or [ff02::1]:5350 */
memset(&addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("224.0.0.1");
addr.sin_port = htons(5350);
for(i = 0; i < n_sockets; i++) {
len = sendto_or_schedule(sockets[i], buff, PCP_MIN_LEN, 0, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if( len < 0 ) {
syslog(LOG_ERR, "PCPSendUnsolicitedAnnounce() sendto(): %m");
}
}
#ifdef ENABLE_IPV6
memset(&addr6, 0, sizeof(struct sockaddr_in6));
addr6.sin6_family = AF_INET6;
inet_pton(AF_INET6, "FF02::1", &(addr6.sin6_addr));
addr6.sin6_port = htons(5350);
len = sendto_or_schedule(socket6, buff, PCP_MIN_LEN, 0, (struct sockaddr *)&addr6, sizeof(struct sockaddr_in6));
if( len < 0 ) {
syslog(LOG_ERR, "PCPSendUnsolicitedAnnounce() IPv6 sendto(): %m");
}
#endif /* ENABLE_IPV6 */
}
#ifdef ENABLE_IPV6
void PCPPublicAddressChanged(int * sockets, int n_sockets, int socket6)
#else /* IPv4 only */
void PCPPublicAddressChanged(int * sockets, int n_sockets)
#endif
{
/* according to RFC 6887 8.5 :
* if the external IP address(es) of the NAT (controlled by
* the PCP server) changes, the Epoch time MUST be reset. */
epoch_origin = time(NULL);
#ifdef ENABLE_IPV6
PCPSendUnsolicitedAnnounce(sockets, n_sockets, socket6);
#else /* IPv4 Only */
PCPSendUnsolicitedAnnounce(sockets, n_sockets);
#endif
}
#endif /*ENABLE_PCP*/

6
miniupnpd/pcpserver.h
View File

@ -56,6 +56,10 @@ int OpenAndConfPCPv6Socket(void);
/*
* To be called when Public IP address changed (IPv4)
*/
void PCPPublicAddressChanged(void);
#ifdef ENABLE_IPV6
void PCPPublicAddressChanged(int * sockets, int n_sockets, int socket6);
#else /* IPV4 Only */
void PCPPublicAddressChanged(int * sockets, int n_sockets);
#endif
#endif /* PCPSERVER_H_INCLUDED */