X-Git-Url: https://git.decadent.org.uk/gitweb/?p=odhcp6c.git;a=blobdiff_plain;f=src%2Fscript.c;h=9d88daf43676054a4c415b917b8f8a7931d38452;hp=ffb39f3f5726470513e8f0004f12bd7007048b61;hb=aeb7c37224051811553c898b2a784944f26276b0;hpb=afe1e5d900c7c1fa66485b70be4691fcf5c58339

diff --git a/src/script.c b/src/script.c
index ffb39f3..9d88daf 100644
--- a/src/script.c
+++ b/src/script.c
@@ -13,10 +13,12 @@
  */
 
 #include <stdio.h>
+#include <netdb.h>
 #include <resolv.h>
 #include <stdlib.h>
 #include <string.h>
 #include <syslog.h>
+#include <signal.h>
 #include <unistd.h>
 #include <arpa/inet.h>
 #include <netinet/in.h>
@@ -38,6 +40,7 @@ static const int8_t hexvals[] = {
 
 
 static char *argv[4] = {NULL, NULL, NULL, NULL};
+static volatile char *delayed_call = NULL;
 
 
 int script_init(const char *path, const char *ifname)
@@ -96,13 +99,14 @@ static void ipv6_to_env(const char *name,
 static void fqdn_to_env(const char *name, const uint8_t *fqdn, size_t len)
 {
 	size_t buf_len = strlen(name);
+	size_t buf_size = len + buf_len + 2;
 	const uint8_t *fqdn_end = fqdn + len;
 	char *buf = realloc(NULL, len + buf_len + 2);
 	memcpy(buf, name, buf_len);
 	buf[buf_len++] = '=';
 	int l = 1;
 	while (l > 0 && fqdn < fqdn_end) {
-		l = dn_expand(fqdn, &fqdn[len], fqdn, &buf[buf_len], len);
+		l = dn_expand(fqdn, fqdn_end, fqdn, &buf[buf_len], buf_size - buf_len);
 		fqdn += l;
 		buf_len += strlen(&buf[buf_len]);
 		buf[buf_len++] = ' ';
@@ -112,6 +116,29 @@ static void fqdn_to_env(const char *name, const uint8_t *fqdn, size_t len)
 }
 
 
+static void fqdn_to_ip_env(const char *name, const uint8_t *fqdn, size_t len)
+{
+	size_t buf_len = strlen(name);
+	char *buf = realloc(NULL, INET6_ADDRSTRLEN + buf_len + 3);
+	memcpy(buf, name, buf_len);
+	buf[buf_len++] = '=';
+
+	char namebuf[256];
+	if (dn_expand(fqdn, fqdn + len, fqdn, namebuf, sizeof(namebuf)) <= 0)
+		return;
+
+	struct addrinfo hints = {.ai_family = AF_INET6}, *r;
+	if (getaddrinfo(namebuf, NULL, &hints, &r))
+		return;
+
+	struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)r->ai_addr;
+	inet_ntop(AF_INET6, &sin6->sin6_addr, &buf[buf_len], INET6_ADDRSTRLEN);
+
+	freeaddrinfo(r);
+	putenv(buf);
+}
+
+
 static void bin_to_env(uint8_t *opts, size_t len)
 {
 	uint8_t *oend = opts + len, *odata;
@@ -162,7 +189,7 @@ static void entry_to_env(const char *name, const void *data, size_t len, enum en
 
 			if (type == ENTRY_PREFIX && e[i].priority) {
 				// priority and router are abused for prefix exclusion
-				buf[buf_len++] = ',';
+				buf_len += snprintf(&buf[buf_len], 12, ",excluded=");
 				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);
@@ -176,10 +203,31 @@ static void entry_to_env(const char *name, const void *data, size_t len, enum en
 }
 
 
+static void script_call_delayed(int signal __attribute__((unused)))
+{
+	if (delayed_call)
+		script_call((char*)delayed_call);
+}
+
+
+void script_delay_call(const char *status, int timeout)
+{
+	if (!delayed_call) {
+		delayed_call = strdup(status);
+		signal(SIGALRM, script_call_delayed);
+		alarm(timeout);
+	}
+}
+
+
 void script_call(const char *status)
 {
 	size_t dns_len, search_len, custom_len, sntp_ip_len, sntp_dns_len;
-	size_t sip_ip_len, sip_fqdn_len;
+	size_t sip_ip_len, sip_fqdn_len, aftr_name_len;
+
+	odhcp6c_expire();
+	if (delayed_call)
+		alarm(0);
 
 	struct in6_addr *dns = odhcp6c_get_state(STATE_DNS, &dns_len);
 	uint8_t *search = odhcp6c_get_state(STATE_SEARCH, &search_len);
@@ -188,6 +236,7 @@ void script_call(const char *status)
 	uint8_t *sntp_dns = odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
 	struct in6_addr *sip = odhcp6c_get_state(STATE_SIP_IP, &sip_ip_len);
 	uint8_t *sip_fqdn = odhcp6c_get_state(STATE_SIP_FQDN, &sip_fqdn_len);
+	uint8_t *aftr_name = odhcp6c_get_state(STATE_AFTR_NAME, &aftr_name_len);
 
 	size_t prefix_len, address_len, ra_pref_len, ra_route_len, ra_dns_len;
 	uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len);
@@ -204,6 +253,8 @@ void script_call(const char *status)
 		fqdn_to_env("DOMAINS", search, search_len);
 		fqdn_to_env("SNTP_FQDN", sntp_dns, sntp_dns_len);
 		fqdn_to_env("SIP_DOMAIN", sip_fqdn, sip_fqdn_len);
+		fqdn_to_env("AFTR", aftr_name, aftr_name_len);
+		fqdn_to_ip_env("AFTR_IP", aftr_name, aftr_name_len);
 		bin_to_env(custom, custom_len);
 		entry_to_env("PREFIXES", prefix, prefix_len, ENTRY_PREFIX);
 		entry_to_env("ADDRESSES", address, address_len, ENTRY_ADDRESS);