177 static void *d6_find_option(uint8_t *option, uint8_t *option_end, unsigned code)  in d6_find_option()  argument
180 	int len_m4 = option_end - option - 4;  in d6_find_option()
183 		if (option[3] > len_m4)  in d6_find_option()
189 		if (option[0] != 0 || option[2] != 0)  in d6_find_option()
193 		if (option[1] == code)  in d6_find_option()
194 			return option; /* yes! */  in d6_find_option()
195 		len_m4 -= option[3] + 4;  in d6_find_option()
196 		option += option[3] + 4;  in d6_find_option()
201 static void *d6_copy_option(uint8_t *option, uint8_t *option_end, unsigned code)  in d6_copy_option()  argument
203 	uint8_t *opt = d6_find_option(option, option_end, code);  in d6_copy_option()
217 static char *string_option_to_env(const uint8_t *option,  in string_option_to_env()  argument
227 		if (d6_optflags[i].code == option[1]) {  in string_option_to_env()
234 	bb_error_msg("can't find option name for 0x%x, skipping", option[1]);  in string_option_to_env()
238 	val_len = (option[2] << 8) | option[3];  in string_option_to_env()
239 	if (val_len + &option[D6_OPT_DATA] > option_end) {  in string_option_to_env()
243 	return xasprintf("%s=%.*s", name, val_len, (char*)option + 4);  in string_option_to_env()
247 static void option_to_env(const uint8_t *option, const uint8_t *option_end)  in option_to_env()  argument
253 	int len_m4 = option_end - option - 4;  in option_to_env()
259 		if (option[0] != 0 || option[2] != 0)  in option_to_env()
263 		if (option[3] > len_m4)  in option_to_env()
266 		switch (option[1]) {  in option_to_env()
271 			option_to_env(option + 16, option + 4 + option[3]);  in option_to_env()
291 			if (option[3] < 24)  in option_to_env()
294 			sprint_nip6(ipv6str, option + 4);  in option_to_env()
297 			move_from_unaligned32(v32, option + 4 + 16 + 4);  in option_to_env()
334 			move_from_unaligned32(v32, option + 4 + 4);  in option_to_env()
337 			sprint_nip6(ipv6str, option + 4 + 4 + 4 + 1);  in option_to_env()
338 			*new_env() = xasprintf("ipv6prefix=%s/%u", ipv6str, (unsigned)(option[4 + 4 + 4]));  in option_to_env()
345 			if ((option[3] & 0x0f) != 0)  in option_to_env()
349 			addrs = option[3] >> 4;  in option_to_env()
357 				sprint_nip6(dlist, option + 4 + option_offset);  in option_to_env()
369 			dlist = dname_dec(option + 4, (option[2] << 8) | option[3], "search=");  in option_to_env()
380 			if (option[3] == 0)  in option_to_env()
389 			if (option[4] & 0xf8) {  in option_to_env()
390 				*new_env() = xasprintf("fqdn=%.*s", (int)option[3], (char*)option + 4);  in option_to_env()
393 			dlist = dname_dec(option + 5, (/*(option[2] << 8) |*/ option[3]) - 1, "fqdn=");  in option_to_env()
403 			*new_env() = xasprintf("tz=%.*s", (int)option[3], (char*)option + 4);  in option_to_env()
406 			*new_env() = xasprintf("tz_name=%.*s", (int)option[3], (char*)option + 4);  in option_to_env()
414 			char *tmp = string_option_to_env(option, option_end);  in option_to_env()
420 		len_m4 -= 4 + option[3];  in option_to_env()
421 		option += 4 + option[3];  in option_to_env()
425 static char **fill_envp(const uint8_t *option, const uint8_t *option_end)  in fill_envp()  argument
434 	if (option)  in fill_envp()
435 		option_to_env(option, option_end);  in fill_envp()
445 static void d6_run_script(const uint8_t *option, const uint8_t *option_end,  in d6_run_script()  argument
451 	envp = fill_envp(option, option_end);  in d6_run_script()
512 	unsigned option;  in add_d6_client_options()  local
516 	for (option = 1; option < 256; option++) {  in add_d6_client_options()
517 		if (client_data.opt_mask[option >> 3] & (1 << (option & 7))) {  in add_d6_client_options()
518 			ptr[0] = (option >> 8);  in add_d6_client_options()
519 			ptr[1] = option;  in add_d6_client_options()
1608 				struct d6_option *option;  in udhcpc6_main()  local
1616 				option = d6_find_option(packet.d6_options, packet_end, D6_OPT_STATUS_CODE);  in udhcpc6_main()
1617 				if (option && (option->data[0] | option->data[1]) != 0) {  in udhcpc6_main()
1619 					bb_info_msg("received DHCP NAK (%u)", option->data[4]);  in udhcpc6_main()
1632 				option = d6_copy_option(packet.d6_options, packet_end, D6_OPT_SERVERID);  in udhcpc6_main()
1633 				if (!option) {  in udhcpc6_main()
1642 				client6_data.server_id = option;  in udhcpc6_main()