Initial support for RFC 6603

[odhcp6c.git] / src / script.c

diff --git a/src/script.c b/src/script.c
index b94b25e9803acf8c0ce2cbc832a7d138c3ed661e..ffb39f3f5726470513e8f0004f12bd7007048b61 100644 (file)
--- a/src/script.c
+++ b/src/script.c
@@ -128,8 +128,14 @@ static void bin_to_env(uint8_t *opts, size_t len)
        }
 }
 
+enum entry_type {
+       ENTRY_ADDRESS,
+       ENTRY_HOST,
+       ENTRY_ROUTE,
+       ENTRY_PREFIX
+};
 
-static void entry_to_env(const char *name, const void *data, size_t len, bool host, bool route)
+static void entry_to_env(const char *name, const void *data, size_t len, enum entry_type type)
 {
        size_t buf_len = strlen(name);
        const struct odhcp6c_entry *e = data;
@@ -140,9 +146,9 @@ static void entry_to_env(const char *name, const void *data, size_t len, bool ho
        for (size_t i = 0; i < len / sizeof(*e); ++i) {
                inet_ntop(AF_INET6, &e[i].target, &buf[buf_len], INET6_ADDRSTRLEN);
                buf_len += strlen(&buf[buf_len]);
-               if (!host) {
+               if (type != ENTRY_HOST) {
                        buf_len += snprintf(&buf[buf_len], 6, "/%hhu", e[i].length);
-                       if (route) {
+                       if (type == ENTRY_ROUTE) {
                                buf[buf_len++] = ',';
                                if (!IN6_IS_ADDR_UNSPECIFIED(&e[i].router)) {
                                        inet_ntop(AF_INET6, &e[i].router, &buf[buf_len], INET6_ADDRSTRLEN);
@@ -153,6 +159,14 @@ static void entry_to_env(const char *name, const void *data, size_t len, bool ho
                        } else {
                                buf_len += snprintf(&buf[buf_len], 24, ",%u,%u", e[i].preferred, e[i].valid);
                        }
+
+                       if (type == ENTRY_PREFIX && e[i].priority) {
+                               // priority and router are abused for prefix exclusion
+                               buf[buf_len++] = ',';
+                               inet_ntop(AF_INET6, &e[i].router, &buf[buf_len], INET6_ADDRSTRLEN);
+                               buf_len += strlen(&buf[buf_len]);
+                               buf_len += snprintf(&buf[buf_len], 24, "/%u", e[i].priority);
+                       }
                }
                buf[buf_len++] = ' ';
        }
@@ -191,11 +205,11 @@ void script_call(const char *status)
                fqdn_to_env("SNTP_FQDN", sntp_dns, sntp_dns_len);
                fqdn_to_env("SIP_DOMAIN", sip_fqdn, sip_fqdn_len);
                bin_to_env(custom, custom_len);
-               entry_to_env("PREFIXES", prefix, prefix_len, false, false);
-               entry_to_env("ADDRESSES", address, address_len, false, false);
-               entry_to_env("RA_ADDRESSES", ra_pref, ra_pref_len, false, false);
-               entry_to_env("RA_ROUTES", ra_route, ra_route_len, false, true);
-               entry_to_env("RA_DNS", ra_dns, ra_dns_len, true, false);
+               entry_to_env("PREFIXES", prefix, prefix_len, ENTRY_PREFIX);
+               entry_to_env("ADDRESSES", address, address_len, ENTRY_ADDRESS);
+               entry_to_env("RA_ADDRESSES", ra_pref, ra_pref_len, ENTRY_ADDRESS);
+               entry_to_env("RA_ROUTES", ra_route, ra_route_len, ENTRY_ROUTE);
+               entry_to_env("RA_DNS", ra_dns, ra_dns_len, ENTRY_HOST);
 
                argv[2] = (char*)status;
                execv(argv[0], argv);