Enable softwire-support by default
[odhcp6c.git] / src / script.c
index 4eec04d..d443ede 100644 (file)
@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2012 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License v2 as published by
  */
 
 #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 <inttypes.h>
 #include <arpa/inet.h>
 #include <netinet/in.h>
 
@@ -38,6 +41,8 @@ static const int8_t hexvals[] = {
 
 
 static char *argv[4] = {NULL, NULL, NULL, NULL};
+static volatile char *delayed_call = NULL;
+static bool dont_delay = false;
 
 
 int script_init(const char *path, const char *ifname)
@@ -96,13 +101,14 @@ 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 +118,29 @@ 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;
@@ -128,12 +157,17 @@ 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)
+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;
-       const struct in6_addr any = IN6ADDR_ANY_INIT;
        char *buf = realloc(NULL, buf_len + 2 + (len / sizeof(*e)) * 144);
        memcpy(buf, name, buf_len);
        buf[buf_len++] = '=';
@@ -141,16 +175,32 @@ 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) {
-                       buf_len += snprintf(&buf[buf_len], 6, "/%hhu", e[i].length);
-                       if (!IN6_ARE_ADDR_EQUAL(&any, &e[i].router)) {
-                               buf[buf_len++] = '@';
+               if (type != ENTRY_HOST) {
+                       buf_len += snprintf(&buf[buf_len], 6, "/%"PRIu16, e[i].length);
+                       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);
+                                       buf_len += strlen(&buf[buf_len]);
+                               }
+                               buf_len += snprintf(&buf[buf_len], 24, ",%u", e[i].valid);
+                               buf_len += snprintf(&buf[buf_len], 12, ",%u", e[i].priority);
+                       } else {
+                               buf_len += snprintf(&buf[buf_len], 24, ",%u,%u", e[i].preferred, e[i].valid);
+                       }
+
+                       if ((type == ENTRY_PREFIX || type == ENTRY_ADDRESS) && e[i].class)
+                               buf_len += snprintf(&buf[buf_len], 12, ",class=%u", e[i].class);
+                       else if (type == ENTRY_PREFIX && ntohl(e[i].iaid) != 1)
+                               buf_len += snprintf(&buf[buf_len], 16, ",class=%08x", ntohl(e[i].iaid));
+
+                       if (type == ENTRY_PREFIX && e[i].priority) {
+                               // priority and router are abused for prefix exclusion
+                               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);
                        }
-                       buf_len += snprintf(&buf[buf_len], 24, ",%u,%u", e[i].preferred, e[i].valid);
-                       if (e[i].priority)
-                               buf_len += snprintf(&buf[buf_len], 12, ",%u", e[i].priority);
                }
                buf[buf_len++] = ' ';
        }
@@ -160,19 +210,173 @@ static void entry_to_env(const char *name, const void *data, size_t len, bool ho
 }
 
 
+static void s46_to_env_portparams(const uint8_t *data, size_t len, FILE *fp)
+{
+       uint8_t *odata;
+       uint16_t otype, olen;
+       dhcpv6_for_each_option(data, &data[len], otype, olen, odata) {
+               if (otype == DHCPV6_OPT_S46_PORTPARAMS &&
+                               olen == sizeof(struct dhcpv6_s46_portparams)) {
+                       struct dhcpv6_s46_portparams *params = (void*)odata;
+                       fprintf(fp, "offset=%d,psidlen=%d,psid=%d,",
+                                       params->offset, params->psid_len, ntohs(params->psid));
+               }
+       }
+}
+
+
+static void s46_to_env(enum odhcp6c_state state, const uint8_t *data, size_t len)
+{
+       const char *name = (state == STATE_S46_MAPE) ? "MAPE" :
+                       (state == STATE_S46_MAPT) ? "MAPT" : "LW4O6";
+
+       char *str;
+       size_t strsize;
+
+       FILE *fp = open_memstream(&str, &strsize);
+       fputs(name, fp);
+       fputc('=', fp);
+
+       const char *type = (state == STATE_S46_MAPE) ? "map-e" :
+                       (state == STATE_S46_MAPT) ? "map-t" : "lw4o6";
+
+       uint8_t *odata;
+       uint16_t otype, olen;
+       dhcpv6_for_each_option(data, &data[len], otype, olen, odata) {
+               struct dhcpv6_s46_rule *rule = (struct dhcpv6_s46_rule*)odata;
+               struct dhcpv6_s46_dmr *dmr = (struct dhcpv6_s46_dmr*)odata;
+               struct dhcpv6_s46_v4v6bind *bind = (struct dhcpv6_s46_v4v6bind*)odata;
+
+               if (state != STATE_S46_LW && otype == DHCPV6_OPT_S46_RULE &&
+                               olen >= sizeof(struct dhcpv6_s46_rule)) {
+                       char buf4[INET_ADDRSTRLEN];
+                       char buf6[INET6_ADDRSTRLEN];
+                       struct in6_addr in6 = IN6ADDR_ANY_INIT;
+
+                       size_t prefix6len = rule->prefix6_len;
+                       prefix6len = (prefix6len % 8 == 0) ? prefix6len / 8 : prefix6len / 8 + 1;
+
+                       if (olen < sizeof(struct dhcpv6_s46_rule) + prefix6len)
+                               continue;
+
+                       memcpy(&in6, rule->ipv6_prefix, prefix6len);
+
+                       inet_ntop(AF_INET, &rule->ipv4_prefix, buf4, sizeof(buf4));
+                       inet_ntop(AF_INET6, &in6, buf6, sizeof(buf6));
+
+                       if (rule->flags & 1)
+                               fputs("fmr,", fp);
+
+                       fprintf(fp, "type=%s,ealen=%d,prefix4len=%d,prefix6len=%d,ipv4prefix=%s,ipv6prefix=%s,",
+                                       type, rule->ea_len, rule->prefix4_len, rule->prefix6_len, buf4, buf6);
+
+                       s46_to_env_portparams(&rule->ipv6_prefix[prefix6len],
+                                       olen - sizeof(*rule) - prefix6len, fp);
+
+                       dhcpv6_for_each_option(data, &data[len], otype, olen, odata) {
+                               if (state != STATE_S46_MAPT && otype == DHCPV6_OPT_S46_BR &&
+                                               olen == sizeof(struct in6_addr)) {
+                                       inet_ntop(AF_INET6, odata, buf6, sizeof(buf6));
+                                       fprintf(fp, "br=%s,", buf6);
+                               } else if (state == STATE_S46_MAPT && otype == DHCPV6_OPT_S46_DMR &&
+                                               olen >= sizeof(struct dhcpv6_s46_dmr)) {
+                                       dmr = (struct dhcpv6_s46_dmr*)odata;
+                                       memset(&in6, 0, sizeof(in6));
+                                       size_t prefix6len = dmr->dmr_prefix6_len;
+                                       prefix6len = (prefix6len % 8 == 0) ? prefix6len / 8 : prefix6len / 8 + 1;
+
+                                       if (olen < sizeof(struct dhcpv6_s46_dmr) + prefix6len)
+                                               continue;
+
+                                       memcpy(&in6, dmr->dmr_ipv6_prefix, prefix6len);
+                                       inet_ntop(AF_INET6, &in6, buf6, sizeof(buf6));
+                                       fprintf(fp, "dmr=%s/%d,", buf6, dmr->dmr_prefix6_len);
+                               }
+                       }
+               } else if (state == STATE_S46_LW && otype == DHCPV6_OPT_S46_V4V6BIND &&
+                               olen >= sizeof(struct dhcpv6_s46_v4v6bind)) {
+                       char buf4[INET_ADDRSTRLEN];
+                       char buf6[INET6_ADDRSTRLEN];
+                       struct in6_addr in6 = IN6ADDR_ANY_INIT;
+
+                       size_t prefix6len = bind->bindprefix6_len;
+                       prefix6len = (prefix6len % 8 == 0) ? prefix6len / 8 : prefix6len / 8 + 1;
+
+                       if (olen < sizeof(struct dhcpv6_s46_v4v6bind) + prefix6len)
+                               continue;
+
+                       memcpy(&in6, bind->bind_ipv6_prefix, prefix6len);
+
+                       inet_ntop(AF_INET, &bind->ipv4_address, buf4, sizeof(buf4));
+                       inet_ntop(AF_INET6, &in6, buf6, sizeof(buf6));
+
+                       fprintf(fp, "type=%s,ipv4address=%s,prefix6len=%d,ipv6prefix=%s,",
+                                       type, buf4, bind->bindprefix6_len, buf6);
+
+                       s46_to_env_portparams(&bind->bind_ipv6_prefix[prefix6len],
+                                       olen - sizeof(*bind) - prefix6len, fp);
+
+                       dhcpv6_for_each_option(data, &data[len], otype, olen, odata) {
+                               if (otype == DHCPV6_OPT_S46_BR && olen == sizeof(struct in6_addr)) {
+                                       inet_ntop(AF_INET6, odata, buf6, sizeof(buf6));
+                                       fprintf(fp, "br=%s,", buf6);
+                               }
+                       }
+               }
+
+               fputc(' ', fp);
+       }
+
+       fclose(fp);
+       putenv(str);
+}
+
+
+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 (dont_delay) {
+               script_call(status);
+       } else if (!delayed_call) {
+               delayed_call = strdup(status);
+               signal(SIGALRM, script_call_delayed);
+               alarm(timeout);
+       }
+}
+
+
 void script_call(const char *status)
 {
-       syslog(LOG_WARNING, "State for %s changed to %s", argv[1], 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 dns_len, search_len, custom_len, sntp_ip_len, ntp_ip_len, ntp_dns_len;
+       size_t sip_ip_len, sip_fqdn_len, aftr_name_len, cer_len;
+       size_t s46_mapt_len, s46_mape_len, s46_lw_len, passthru_len;
+
+       odhcp6c_expire();
+       if (delayed_call) {
+               alarm(0);
+               dont_delay = true;
+       }
 
        struct in6_addr *dns = odhcp6c_get_state(STATE_DNS, &dns_len);
        uint8_t *search = odhcp6c_get_state(STATE_SEARCH, &search_len);
        uint8_t *custom = odhcp6c_get_state(STATE_CUSTOM_OPTS, &custom_len);
        struct in6_addr *sntp = odhcp6c_get_state(STATE_SNTP_IP, &sntp_ip_len);
-       uint8_t *sntp_dns = odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
+       struct in6_addr *ntp = odhcp6c_get_state(STATE_NTP_IP, &ntp_ip_len);
+       uint8_t *ntp_dns = odhcp6c_get_state(STATE_NTP_FQDN, &ntp_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);
+       struct in6_addr *cer = odhcp6c_get_state(STATE_CER, &cer_len);
+       uint8_t *s46_mapt = odhcp6c_get_state(STATE_S46_MAPT, &s46_mapt_len);
+       uint8_t *s46_mape = odhcp6c_get_state(STATE_S46_MAPE, &s46_mape_len);
+       uint8_t *s46_lw = odhcp6c_get_state(STATE_S46_LW, &s46_lw_len);
+       uint8_t *passthru = odhcp6c_get_state(STATE_PASSTHRU, &passthru_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);
@@ -185,16 +389,28 @@ void script_call(const char *status)
        if (fork() == 0) {
                ipv6_to_env("RDNSS", dns, dns_len / sizeof(*dns));
                ipv6_to_env("SNTP_IP", sntp, sntp_ip_len / sizeof(*sntp));
+               ipv6_to_env("NTP_IP", ntp, ntp_ip_len / sizeof(*ntp));
+               fqdn_to_env("NTP_FQDN", ntp_dns, ntp_dns_len);
                ipv6_to_env("SIP_IP", sip, sip_ip_len / sizeof(*sip));
                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);
+               ipv6_to_env("CER", cer, cer_len / sizeof(*cer));
+               s46_to_env(STATE_S46_MAPE, s46_mape, s46_mape_len);
+               s46_to_env(STATE_S46_MAPT, s46_mapt, s46_mapt_len);
+               s46_to_env(STATE_S46_LW, s46_lw, s46_lw_len);
                bin_to_env(custom, custom_len);
-               entry_to_env("PREFIXES", prefix, prefix_len, false);
-               entry_to_env("ADDRESSES", address, address_len, false);
-               entry_to_env("RA_ADDRESSES", ra_pref, ra_pref_len, false);
-               entry_to_env("RA_ROUTES", ra_route, ra_route_len, false);
-               entry_to_env("RA_DNS", ra_dns, ra_dns_len, true);
+               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);
+
+               char *buf = malloc(10 + passthru_len * 2);
+               strncpy(buf, "PASSTHRU=", 10);
+               script_hexlify(&buf[9], passthru, passthru_len);
+               putenv(buf);
 
                argv[2] = (char*)status;
                execv(argv[0], argv);