diff options
Diffstat (limited to 'accel-pptpd/ppp/ipcp_opt_ipaddr.c')
| -rw-r--r-- | accel-pptpd/ppp/ipcp_opt_ipaddr.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/accel-pptpd/ppp/ipcp_opt_ipaddr.c b/accel-pptpd/ppp/ipcp_opt_ipaddr.c index 93ddb10f..334f4256 100644 --- a/accel-pptpd/ppp/ipcp_opt_ipaddr.c +++ b/accel-pptpd/ppp/ipcp_opt_ipaddr.c @@ -16,6 +16,8 @@ #include "memdebug.h" +static int conf_check_exists; + static struct ipcp_option_t *ipaddr_init(struct ppp_ipcp_t *ipcp); static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt); static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr); @@ -61,6 +63,24 @@ static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt) _free(ipaddr_opt); } +static int check_exists(struct ppp_t *self_ppp, in_addr_t addr) +{ + struct ppp_t *ppp; + int r = 0; + + pthread_rwlock_rdlock(&ppp_lock); + list_for_each_entry(ppp, &ppp_list, entry) { + if (!ppp->terminating && ppp->peer_ipaddr == addr && ppp != self_ppp) { + log_ppp_warn("ppp:ipcp: requested IP already assigned to %s\n", ppp->ifname); + r = 1; + break; + } + } + pthread_rwlock_unlock(&ppp_lock); + + return r; +} + static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr) { struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt); @@ -73,6 +93,7 @@ static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *o return -1; } } + if (iprange_tunnel_check(ipaddr_opt->ip->peer_addr)) { log_ppp_warn("ppp:ipcp: to avoid kernel soft lockup requested IP cannot be assigned (%i.%i.%i.%i)\n", ipaddr_opt->ip->peer_addr&0xff, @@ -82,6 +103,9 @@ static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *o return -1; } + if (conf_check_exists && check_exists(ipcp->ppp, ipaddr_opt->ip->peer_addr)) + return -1; + opt32->hdr.id=CI_ADDR; opt32->hdr.len=6; opt32->val=ipaddr_opt->ip->addr; @@ -185,8 +209,19 @@ static void ipaddr_print(void (*print)(const char *fmt,...),struct ipcp_option_t print("<addr %s>",inet_ntoa(in)); } +static void load_config(void) +{ + const char *opt; + + opt = conf_get_opt("ppp", "check-ip"); + if (opt && atoi(opt) > 0) + conf_check_exists = 1; +} + static void __init ipaddr_opt_init() { ipcp_option_register(&ipaddr_opt_hnd); + load_config(); + triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config); } |