diff options
Diffstat (limited to 'src/script.c')
| -rw-r--r-- | src/script.c | 105 |
1 files changed, 69 insertions, 36 deletions
diff --git a/src/script.c b/src/script.c index dbdd89b..3d313cf 100644 --- a/src/script.c +++ b/src/script.c @@ -22,6 +22,7 @@ #include <unistd.h> #include <inttypes.h> #include <arpa/inet.h> +#include <sys/wait.h> #include <netinet/in.h> #include "odhcp6c.h" @@ -39,14 +40,27 @@ static const int8_t hexvals[] = { }; +static char action[16] = ""; +static char *argv[4] = {NULL, NULL, action, NULL}; +static volatile pid_t running = 0; +static time_t started; -static char *argv[4] = {NULL, NULL, NULL, NULL}; +static void script_sighandle(int signal) +{ + if (signal == SIGCHLD) { + pid_t child; + while ((child = waitpid(-1, NULL, WNOHANG)) > 0) + if (running == child) + running = 0; + } +} int script_init(const char *path, const char *ifname) { argv[0] = (char*)path; argv[1] = (char*)ifname; + signal(SIGCHLD, script_sighandle); return 0; } @@ -336,41 +350,61 @@ static void s46_to_env(enum odhcp6c_state state, const uint8_t *data, size_t len } -void script_call(const char *status) +void script_call(const char *status, int delay, bool resume) { - 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, addr_len; - size_t s46_mapt_len, s46_mape_len, s46_lw_len, passthru_len; - - odhcp6c_expire(); - - struct in6_addr *addr = odhcp6c_get_state(STATE_SERVER_ADDR, &addr_len); - 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); - 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, ra_search_len; - uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len); - uint8_t *address = odhcp6c_get_state(STATE_IA_NA, &address_len); - uint8_t *ra_pref = odhcp6c_get_state(STATE_RA_PREFIX, &ra_pref_len); - uint8_t *ra_route = odhcp6c_get_state(STATE_RA_ROUTE, &ra_route_len); - uint8_t *ra_dns = odhcp6c_get_state(STATE_RA_DNS, &ra_dns_len); - uint8_t *ra_search = odhcp6c_get_state(STATE_RA_SEARCH, &ra_search_len); - - // Don't set environment before forking, because env is leaky. - if (fork() == 0) { + time_t now = odhcp6c_get_milli_time() / 1000; + + if (running) { + kill(running, SIGTERM); + delay -= now - started; + } + + if (resume || !action[0]) + strncpy(action, status, sizeof(action) - 1); + + pid_t pid = fork(); + if (pid > 0) { + running = pid; + started = now; + + if (!resume) + action[0] = 0; + } else if (pid == 0) { + 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, addr_len; + size_t s46_mapt_len, s46_mape_len, s46_lw_len, passthru_len; + + signal(SIGTERM, SIG_DFL); + if (delay > 0) { + sleep(delay); + odhcp6c_expire(); + } + + struct in6_addr *addr = odhcp6c_get_state(STATE_SERVER_ADDR, &addr_len); + 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); + 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, ra_search_len; + uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len); + uint8_t *address = odhcp6c_get_state(STATE_IA_NA, &address_len); + uint8_t *ra_pref = odhcp6c_get_state(STATE_RA_PREFIX, &ra_pref_len); + uint8_t *ra_route = odhcp6c_get_state(STATE_RA_ROUTE, &ra_route_len); + uint8_t *ra_dns = odhcp6c_get_state(STATE_RA_DNS, &ra_dns_len); + uint8_t *ra_search = odhcp6c_get_state(STATE_RA_SEARCH, &ra_search_len); + ipv6_to_env("SERVER", addr, addr_len / sizeof(*addr)); ipv6_to_env("RDNSS", dns, dns_len / sizeof(*dns)); ipv6_to_env("SNTP_IP", sntp, sntp_ip_len / sizeof(*sntp)); @@ -406,7 +440,6 @@ void script_call(const char *status) script_hexlify(&buf[9], passthru, passthru_len); putenv(buf); - argv[2] = (char*)status; execv(argv[0], argv); _exit(128); } |