Fix wrong address pool being advertised

diff --git a/src/odhcpd.h b/src/odhcpd.h
index 010cd9e..2b7829e 100644 (file)
--- a/src/odhcpd.h
+++ b/src/odhcpd.h
@@ -68,6 +68,7 @@ struct odhcpd_event {
 struct odhcpd_ipaddr {
        struct in6_addr addr;
        uint8_t prefix;
+       uint8_t dprefix;
        bool has_class;
        uint16_t class;
        uint32_t preferred;

diff --git a/src/router.c b/src/router.c
index 7a79119..b29e531 100644 (file)
--- a/src/router.c
+++ b/src/router.c
@@ -193,7 +193,7 @@ static bool parse_routes(struct odhcpd_ipaddr *n, ssize_t len)
 
        char line[512], ifname[16];
        bool found_default = false;
-       struct odhcpd_ipaddr p = {IN6ADDR_ANY_INIT, 0, false, 0, 0, 0};
+       struct odhcpd_ipaddr p = {IN6ADDR_ANY_INIT, 0, 0, false, 0, 0, 0};
        while (fgets(line, sizeof(line), fp_route)) {
                uint32_t rflags;
                if (sscanf(line, "00000000000000000000000000000000 00 "
@@ -211,7 +211,7 @@ static bool parse_routes(struct odhcpd_ipaddr *n, ssize_t len)
                        for (ssize_t i = 0; i < len; ++i) {
                                if (n[i].prefix <= 64 && n[i].prefix >= p.prefix &&
                                                !odhcpd_bmemcmp(&p.addr, &n[i].addr, p.prefix)) {
-                                       n[i].prefix = p.prefix;
+                                       n[i].dprefix = p.prefix;
                                        break;
                                }
                        }
@@ -407,18 +407,18 @@ static void send_router_advert(struct uloop_timeout *event)
 
        for (ssize_t i = 0; i < ipcnt; ++i) {
                struct odhcpd_ipaddr *addr = &addrs[i];
-               if (addr->prefix > 64 || addr->prefix == 0) {
+               if (addr->dprefix > 64 || addr->dprefix == 0) {
                        continue; // Address not suitable
-               } else if (addr->prefix > 32) {
-                       addr->addr.s6_addr32[1] &= htonl(~((1U << (64 - addr->prefix)) - 1));
-               } else if (addr->prefix <= 32) {
-                       addr->addr.s6_addr32[0] &= htonl(~((1U << (32 - addr->prefix)) - 1));
+               } else if (addr->dprefix > 32) {
+                       addr->addr.s6_addr32[1] &= htonl(~((1U << (64 - addr->dprefix)) - 1));
+               } else if (addr->dprefix <= 32) {
+                       addr->addr.s6_addr32[0] &= htonl(~((1U << (32 - addr->dprefix)) - 1));
                        addr->addr.s6_addr32[1] = 0;
                }
 
                routes[routes_cnt].type = ND_OPT_ROUTE_INFO;
                routes[routes_cnt].len = sizeof(*routes) / 8;
-               routes[routes_cnt].prefix = addr->prefix;
+               routes[routes_cnt].prefix = addr->dprefix;
                routes[routes_cnt].flags = 0;
                if (iface->route_preference < 0)
                        routes[routes_cnt].flags |= ND_RA_PREF_LOW;