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miniupnpd/pcpserver.c: port NAT-PMP updates to PCP 

This change ports the recent updates to the permissions checking
and eport selection code for NAT-PMP to the PCP MAP handler.
This commit is contained in:
Daniel Becker 2014-03-11 01:54:10 -07:00
parent 210876f2a7
commit efbb95aa10
1 changed files with 34 additions and 10 deletions
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44
miniupnpd/pcpserver.c
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@ -805,6 +805,8 @@ static void CreatePCPMap(pcp_info_t *pcp_msg_info)
char desc[64];
char iaddr_old[INET_ADDRSTRLEN];
uint16_t iport_old;
uint16_t eport_first = 0;
int any_eport_allowed = 0;
unsigned int timestamp;
int r=0;
@ -812,6 +814,32 @@ static void CreatePCPMap(pcp_info_t *pcp_msg_info)
pcp_msg_info->ext_port = pcp_msg_info->int_port;
}
do {
if (eport_first == 0) { /* first time in loop */
eport_first = pcp_msg_info->ext_port;
} else if (pcp_msg_info->ext_port == eport_first) { /* no eport available */
if (any_eport_allowed == 0) { /* all eports rejected by permissions */
pcp_msg_info->result_code = PCP_ERR_NOT_AUTHORIZED;
} else { /* at least one eport allowed (but none available) */
pcp_msg_info->result_code = PCP_ERR_NO_RESOURCES;
}
return;
}
if ((IN6_IS_ADDR_V4MAPPED(pcp_msg_info->int_ip) &&
(!check_upnp_rule_against_permissions(upnppermlist,
num_upnpperm, pcp_msg_info->ext_port,
((struct in_addr*)pcp_msg_info->int_ip->s6_addr)[3],
pcp_msg_info->int_port)))) {
if (pcp_msg_info->pfailure_present) {
pcp_msg_info->result_code = PCP_ERR_CANNOT_PROVIDE_EXTERNAL;
return;
}
pcp_msg_info->ext_port++;
if (pcp_msg_info->ext_port == 0) { /* skip port zero */
pcp_msg_info->ext_port++;
}
continue;
}
any_eport_allowed = 1;
r = get_redirect_rule(ext_if_name,
pcp_msg_info->ext_port,
pcp_msg_info->protocol,
@ -836,24 +864,20 @@ static void CreatePCPMap(pcp_info_t *pcp_msg_info)
if (_upnp_delete_redir(pcp_msg_info->ext_port,
pcp_msg_info->protocol)==0) {
break;
} else if (pcp_msg_info->pfailure_present) {
pcp_msg_info->result_code = PCP_ERR_CANNOT_PROVIDE_EXTERNAL;
return;
}
}
pcp_msg_info->ext_port++;
if (pcp_msg_info->ext_port == 0) { /* skip port zero */
pcp_msg_info->ext_port++;
}
}
} while (r==0);
timestamp = time(NULL) + pcp_msg_info->lifetime;
if ((pcp_msg_info->ext_port == 0) ||
(IN6_IS_ADDR_V4MAPPED(pcp_msg_info->int_ip) &&
(!check_upnp_rule_against_permissions(upnppermlist,
num_upnpperm, pcp_msg_info->ext_port,
((struct in_addr*)pcp_msg_info->int_ip->s6_addr)[3],
pcp_msg_info->int_port)))) {
pcp_msg_info->result_code = PCP_ERR_CANNOT_PROVIDE_EXTERNAL;
return;
}
snprintf(desc, sizeof(desc), "PCP %hu %s",
pcp_msg_info->ext_port,
(pcp_msg_info->protocol==IPPROTO_TCP)?"tcp":"udp");