X-Git-Url: https://git.decadent.org.uk/gitweb/?p=odhcp6c.git;a=blobdiff_plain;f=src%2Fscript.c;h=d443ede71a229e41ca0da7c0623186bdfa0ae01e;hp=4eec04dceba3b4fc193c0f7a1492ccb7fc2821cd;hb=0300fe7589a1701361735ac068e4b57bb1a1896f;hpb=6bc31b22abc26b9ee31b789d56a8e2a07aa4c569 diff --git a/src/script.c b/src/script.c index 4eec04d..d443ede 100644 --- a/src/script.c +++ b/src/script.c @@ -1,5 +1,5 @@ /** - * Copyright (C) 2012 Steven Barth + * Copyright (C) 2012-2014 Steven Barth * * 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 @@ -13,11 +13,14 @@ */ #include +#include #include #include #include #include +#include #include +#include #include #include @@ -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);