From d97c47cad830d00c9da685cc4ea157d6185f6c97 Mon Sep 17 00:00:00 2001 From: The Android Open Source Project Date: Tue, 3 Mar 2009 18:28:20 -0800 Subject: auto import from //depot/cupcake/@135843 --- dhcpcd.c | 1038 -------------------------------------------------------------- 1 file changed, 1038 deletions(-) delete mode 100644 dhcpcd.c (limited to 'dhcpcd.c') diff --git a/dhcpcd.c b/dhcpcd.c deleted file mode 100644 index e674bd2..0000000 --- a/dhcpcd.c +++ /dev/null @@ -1,1038 +0,0 @@ -/* - * dhcpcd - DHCP client daemon - * Copyright 2006-2008 Roy Marples - * All rights reserved - - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -const char copyright[] = "Copyright (c) 2006-2008 Roy Marples"; - -#include -#include -#include - -#include - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "config.h" -#include "client.h" -#include "dhcpcd.h" -#include "dhcp.h" -#include "net.h" -#include "logger.h" - -#ifdef ANDROID -#include -#include -#include -#include -#endif - -/* Don't set any optional arguments here so we retain POSIX - * compatibility with getopt */ -#define OPTS "bc:df:h:i:kl:m:no:pqr:s:t:u:v:xABC:DEF:GI:KLO:Q:TVX:" - -static int doversion = 0; -static int dohelp = 0; -static const struct option longopts[] = { - {"background", no_argument, NULL, 'b'}, - {"script", required_argument, NULL, 'c'}, - {"debug", no_argument, NULL, 'd'}, - {"config", required_argument, NULL, 'f'}, - {"hostname", optional_argument, NULL, 'h'}, - {"vendorclassid", optional_argument, NULL, 'i'}, - {"release", no_argument, NULL, 'k'}, - {"leasetime", required_argument, NULL, 'l'}, - {"metric", required_argument, NULL, 'm'}, - {"rebind", no_argument, NULL, 'n'}, - {"option", required_argument, NULL, 'o'}, - {"persistent", no_argument, NULL, 'p'}, - {"quiet", no_argument, NULL, 'q'}, - {"request", optional_argument, NULL, 'r'}, - {"inform", optional_argument, NULL, 's'}, - {"timeout", required_argument, NULL, 't'}, - {"userclass", required_argument, NULL, 'u'}, - {"vendor", required_argument, NULL, 'v'}, - {"exit", no_argument, NULL, 'x'}, - {"noarp", no_argument, NULL, 'A'}, - {"nobackground", no_argument, NULL, 'B'}, - {"nohook", required_argument, NULL, 'C'}, - {"duid", no_argument, NULL, 'D'}, - {"lastlease", no_argument, NULL, 'E'}, - {"fqdn", optional_argument, NULL, 'F'}, - {"nogateway", no_argument, NULL, 'G'}, - {"clientid", optional_argument, NULL, 'I'}, - {"nolink", no_argument, NULL, 'K'}, - {"noipv4ll", no_argument, NULL, 'L'}, - {"nooption", optional_argument, NULL, 'O'}, - {"require", required_argument, NULL, 'Q'}, - {"test", no_argument, NULL, 'T'}, - {"variables", no_argument, NULL, 'V'}, - {"blacklist", required_argument, NULL, 'X'}, - {"help", no_argument, &dohelp, 1}, - {"version", no_argument, &doversion, 1}, -#ifdef CMDLINE_COMPAT - {"classid", optional_argument, NULL, 'i'}, - {"renew", no_argument, NULL, 'n'}, - {"nohostname", no_argument, NULL, 'H'}, - {"nomtu", no_argument, NULL, 'M'}, - {"nontp", no_argument, NULL, 'N'}, - {"nodns", no_argument, NULL, 'R'}, - {"msscr", no_argument, NULL, 'S'}, - {"nonis", no_argument, NULL, 'Y'}, -#endif - {NULL, 0, NULL, '\0'} -}; - -#ifdef CMDLINE_COMPAT -# define EXTRA_OPTS "HMNRSY" -#endif - -#ifndef EXTRA_OPTS -# define EXTRA_OPTS -#endif - -static int -atoint(const char *s) -{ - char *t; - long n; - - errno = 0; - n = strtol(s, &t, 0); - if ((errno != 0 && n == 0) || s == t || - (errno == ERANGE && (n == LONG_MAX || n == LONG_MIN))) - { - logger(LOG_ERR, "`%s' out of range", s); - return -1; - } - - return (int)n; -} - -static pid_t -read_pid(const char *pidfile) -{ - FILE *fp; - pid_t pid = 0; - - if ((fp = fopen(pidfile, "r")) == NULL) { - errno = ENOENT; - return 0; - } - - fscanf(fp, "%d", &pid); - fclose(fp); - - return pid; -} - -static void -usage(void) -{ - printf("usage: "PACKAGE" [-dknpqxADEGHKLOTV] [-c script] [-f file ] [-h hostname]\n" - " [-i classID ] [-l leasetime] [-m metric] [-o option] [-r ipaddr]\n" - " [-s ipaddr] [-t timeout] [-u userclass] [-F none|ptr|both]\n" - " [-I clientID] [-C hookscript] [-Q option] [-X ipaddr] \n"); -} - -static char * -add_environ(struct options *options, const char *value, int uniq) -{ - char **newlist; - char **lst = options->environ; - size_t i = 0, l, lv; - char *match = NULL, *p; - - match = xstrdup(value); - p = strchr(match, '='); - if (p) - *p++ = '\0'; - l = strlen(match); - - while (lst && lst[i]) { - if (match && strncmp(lst[i], match, l) == 0) { - if (uniq) { - free(lst[i]); - lst[i] = xstrdup(value); - } else { - /* Append a space and the value to it */ - l = strlen(lst[i]); - lv = strlen(p); - lst[i] = xrealloc(lst[i], l + lv + 2); - lst[i][l] = ' '; - memcpy(lst[i] + l + 1, p, lv); - lst[i][l + lv + 1] = '\0'; - } - free(match); - return lst[i]; - } - i++; - } - - newlist = xrealloc(lst, sizeof(char *) * (i + 2)); - newlist[i] = xstrdup(value); - newlist[i + 1] = NULL; - options->environ = newlist; - free(match); - return newlist[i]; -} - -#define parse_string(buf, len, arg) parse_string_hwaddr(buf, len, arg, 0) -static ssize_t -parse_string_hwaddr(char *sbuf, ssize_t slen, char *str, int clid) -{ - ssize_t l; - char *p; - int i; - char c[4]; - - /* If surrounded by quotes then it's a string */ - if (*str == '"') { - str++; - l = strlen(str); - p = str + l - 1; - if (*p == '"') - *p = '\0'; - } else { - l = hwaddr_aton(NULL, str); - if (l > 1) { - if (l > slen) { - errno = ENOBUFS; - return -1; - } - hwaddr_aton((uint8_t *)sbuf, str); - return l; - } - } - - /* Process escapes */ - l = 0; - /* If processing a string on the clientid, first byte should be - * 0 to indicate a non hardware type */ - if (clid) { - *sbuf++ = 0; - l++; - } - c[3] = '\0'; - while (*str) { - if (++l > slen) { - errno = ENOBUFS; - return -1; - } - if (*str == '\\') { - str++; - switch(*str++) { - case '\0': - break; - case 'b': - *sbuf++ = '\b'; - break; - case 'n': - *sbuf++ = '\n'; - break; - case 'r': - *sbuf++ = '\r'; - break; - case 't': - *sbuf++ = '\t'; - break; - case 'x': - /* Grab a hex code */ - c[1] = '\0'; - for (i = 0; i < 2; i++) { - if (isxdigit((unsigned char)*str) == 0) - break; - c[i] = *str++; - } - if (c[1] != '\0') { - c[2] = '\0'; - *sbuf++ = strtol(c, NULL, 16); - } else - l--; - break; - case '0': - /* Grab an octal code */ - c[2] = '\0'; - for (i = 0; i < 3; i++) { - if (*str < '0' || *str > '7') - break; - c[i] = *str++; - } - if (c[2] != '\0') { - i = strtol(c, NULL, 8); - if (i > 255) - i = 255; - *sbuf ++= i; - } else - l--; - break; - default: - *sbuf++ = *str++; - } - } else - *sbuf++ = *str++; - } - return l; -} - -static int -parse_option(int opt, char *oarg, struct options *options) -{ - int i; - char *p; - ssize_t s; - struct in_addr addr; - - switch(opt) { - case 'b': - options->options |= DHCPCD_BACKGROUND; - break; - case 'c': - strlcpy(options->script, oarg, sizeof(options->script)); - break; - case 'h': - if (oarg) - s = parse_string(options->hostname + 1, - HOSTNAME_MAX_LEN, oarg); - else - s = 0; - if (s == -1) { - logger(LOG_ERR, "hostname: %s", strerror(errno)); - return -1; - } - if (s != 0 && options->hostname[1] == '.') { - logger(LOG_ERR, "hostname cannot begin with a ."); - return -1; - } - options->hostname[0] = (uint8_t)s; - break; - case 'i': - if (oarg) - s = parse_string((char *)options->vendorclassid + 1, - VENDORCLASSID_MAX_LEN, oarg); - else - s = 0; - if (s == -1) { - logger(LOG_ERR, "vendorclassid: %s", strerror(errno)); - return -1; - } - *options->vendorclassid = (uint8_t)s; - break; - case 'l': - if (*oarg == '-') { - logger(LOG_ERR, - "leasetime must be a positive value"); - return -1; - } - errno = 0; - options->leasetime = (uint32_t)strtol(oarg, NULL, 0); - if (errno == EINVAL || errno == ERANGE) { - logger(LOG_ERR, "`%s' out of range", oarg); - return -1; - } - break; - case 'm': - options->metric = atoint(oarg); - if (options->metric < 0) { - logger(LOG_ERR, "metric must be a positive value"); - return -1; - } - break; - case 'o': - if (make_option_mask(options->requestmask, &oarg, 1) != 0) { - logger(LOG_ERR, "unknown option `%s'", oarg); - return -1; - } - break; - case 'p': - options->options |= DHCPCD_PERSISTENT; - break; - case 'q': - setloglevel(LOG_WARNING); - break; - case 's': - options->options |= DHCPCD_INFORM; - options->options |= DHCPCD_PERSISTENT; - options->options &= ~DHCPCD_ARP; - if (!oarg || *oarg == '\0') { - options->request_address.s_addr = 0; - break; - } else { - if ((p = strchr(oarg, '/'))) { - /* nullify the slash, so the -r option - * can read the address */ - *p++ = '\0'; - if (sscanf(p, "%d", &i) != 1 || - inet_cidrtoaddr(i, &options->request_netmask) != 0) - { - logger(LOG_ERR, - "`%s' is not a valid CIDR", - p); - return -1; - } - } - } - /* FALLTHROUGH */ - case 'r': - if (!(options->options & DHCPCD_INFORM)) - options->options |= DHCPCD_REQUEST; - if (oarg && !inet_aton(oarg, &options->request_address)) { - logger(LOG_ERR, "`%s' is not a valid IP address", - oarg); - return -1; - } - break; - case 't': - options->timeout = atoint(oarg); - if (options->timeout < 0) { - logger (LOG_ERR, "timeout must be a positive value"); - return -1; - } - break; - case 'u': - s = USERCLASS_MAX_LEN - options->userclass[0] - 1; - s = parse_string((char *)options->userclass + options->userclass[0] + 2, - s, oarg); - if (s == -1) { - logger(LOG_ERR, "userclass: %s", strerror(errno)); - return -1; - } - if (s != 0) { - options->userclass[options->userclass[0] + 1] = s; - options->userclass[0] += s + 1; - } - break; - case 'v': - p = strchr(oarg, ','); - if (!p || !p[1]) { - logger(LOG_ERR, "invalid vendor format"); - return -1; - } - *p = '\0'; - i = atoint(oarg); - oarg = p + 1; - if (i < 1 || i > 254) { - logger(LOG_ERR, "vendor option should be between" - " 1 and 254 inclusive"); - return -1; - } - s = VENDOR_MAX_LEN - options->vendor[0] - 2; - if (inet_aton(oarg, &addr) == 1) { - if (s < 6) { - s = -1; - errno = ENOBUFS; - } else - memcpy(options->vendor + options->vendor[0] + 3, - &addr.s_addr, sizeof(addr.s_addr)); - } else { - s = parse_string((char *)options->vendor + options->vendor[0] + 3, - s, oarg); - } - if (s == -1) { - logger(LOG_ERR, "vendor: %s", strerror(errno)); - return -1; - } - if (s != 0) { - options->vendor[options->vendor[0] + 1] = i; - options->vendor[options->vendor[0] + 2] = s; - options->vendor[0] += s + 2; - } - break; - case 'A': - options->options &= ~DHCPCD_ARP; - /* IPv4LL requires ARP */ - options->options &= ~DHCPCD_IPV4LL; - break; - case 'B': - options->options &= ~DHCPCD_DAEMONISE; - break; - case 'C': - /* Commas to spaces for shell */ - while ((p = strchr(oarg, ','))) - *p = ' '; - s = strlen("skip_hooks=") + strlen(oarg) + 1; - p = xmalloc(sizeof(char) * s); - snprintf(p, s, "skip_hooks=%s", oarg); - add_environ(options, p, 0); - free(p); - break; - case 'D': - options->options |= DHCPCD_DUID; - break; - case 'E': - options->options |= DHCPCD_LASTLEASE; - break; - case 'F': - if (!oarg) { - options->fqdn = FQDN_BOTH; - break; - } - if (strcmp(oarg, "none") == 0) - options->fqdn = FQDN_NONE; - else if (strcmp(oarg, "ptr") == 0) - options->fqdn = FQDN_PTR; - else if (strcmp(oarg, "both") == 0) - options->fqdn = FQDN_BOTH; - else if (strcmp(oarg, "disable") == 0) - options->fqdn = FQDN_DISABLE; - else { - logger(LOG_ERR, "invalid value `%s' for FQDN", - oarg); - return -1; - } - break; - case 'G': - options->options &= ~DHCPCD_GATEWAY; - break; - case 'I': - /* Strings have a type of 0 */; - options->clientid[1] = 0; - if (oarg) - s = parse_string_hwaddr((char *)options->clientid + 1, - CLIENTID_MAX_LEN, oarg, 1); - else - s = 0; - if (s == -1) { - logger(LOG_ERR, "clientid: %s", strerror(errno)); - return -1; - } - options->clientid[0] = (uint8_t)s; - if (s == 0) { - options->options &= ~DHCPCD_DUID; - options->options &= ~DHCPCD_CLIENTID; - } - break; - case 'K': - options->options &= ~DHCPCD_LINK; - break; - case 'L': - options->options &= ~DHCPCD_IPV4LL; - break; - case 'O': - if (make_option_mask(options->requestmask, &oarg, -1) != 0 || - make_option_mask(options->requiremask, &oarg, -1) != 0 || - make_option_mask(options->nomask, &oarg, 1) != 0) - { - logger(LOG_ERR, "unknown option `%s'", oarg); - return -1; - } - break; - case 'Q': - if (make_option_mask(options->requiremask, &oarg, 1) != 0 || - make_option_mask(options->requestmask, &oarg, 1) != 0) - { - logger(LOG_ERR, "unknown option `%s'", oarg); - return -1; - } - break; - case 'X': - if (!inet_aton(oarg, &addr)) { - logger(LOG_ERR, "`%s' is not a valid IP address", - oarg); - return -1; - } - options->blacklist = xrealloc(options->blacklist, - sizeof(in_addr_t) * (options->blacklist_len + 1)); - options->blacklist[options->blacklist_len] = addr.s_addr; - options->blacklist_len++; - break; - default: - return 0; - } - - return 1; -} - -static int -parse_config_line(const char *opt, char *line, struct options *options) -{ - unsigned int i; - - for (i = 0; i < sizeof(longopts) / sizeof(longopts[0]); i++) { - if (!longopts[i].name || - strcmp(longopts[i].name, opt) != 0) - continue; - - if (longopts[i].has_arg == required_argument && !line) { - fprintf(stderr, - PACKAGE ": option requires an argument -- %s\n", - opt); - return -1; - } - - return parse_option(longopts[i].val, line, options); - } - - fprintf(stderr, PACKAGE ": unknown option -- %s\n", opt); - return -1; -} - -#ifdef ANDROID -void switchUser() { - gid_t groups[] = { AID_INET, AID_SHELL }; - setgroups(sizeof(groups)/sizeof(groups[0]), groups); - - prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0); - - setgid(AID_DHCP); - setuid(AID_DHCP); - - struct __user_cap_header_struct header; - struct __user_cap_data_struct cap; - header.version = _LINUX_CAPABILITY_VERSION; - header.pid = 0; - cap.effective = cap.permitted = - (1 << CAP_NET_ADMIN) | (1 << CAP_NET_RAW) | - (1 << CAP_NET_BROADCAST) | (1 << CAP_NET_BIND_SERVICE); - cap.inheritable = 0; - capset(&header, &cap); -} -#endif /* ANDROID */ - -int -main(int argc, char **argv) -{ - struct options *options; - int opt; - int option_index = 0; - char *prefix; - pid_t pid; - int debug = 0; - int i, r; - int pid_fd = -1; - int sig = 0; - int retval = EXIT_FAILURE; - char *line, *option, *p, *buffer = NULL; - size_t len = 0; - FILE *f; - char *cf = NULL; - char *intf = NULL; - struct timespec ts; - -#ifdef ANDROID - switchUser(); -#endif - closefrom(3); - /* Saves calling fflush(stream) in the logger */ - setlinebuf(stdout); - openlog(PACKAGE, LOG_PID, LOG_LOCAL0); - setlogprefix(PACKAGE ": "); - - options = xzalloc(sizeof(*options)); - options->options |= DHCPCD_CLIENTID | DHCPCD_GATEWAY | DHCPCD_DAEMONISE; - options->options |= DHCPCD_ARP | DHCPCD_IPV4LL | DHCPCD_LINK; - options->timeout = DEFAULT_TIMEOUT; - strlcpy(options->script, SCRIPT, sizeof(options->script)); - - options->vendorclassid[0] = snprintf((char *)options->vendorclassid + 1, - VENDORCLASSID_MAX_LEN, - "%s %s", PACKAGE, VERSION); - -#ifdef CMDLINE_COMPAT - add_option_mask(options->requestmask, DHO_DNSSERVER); - add_option_mask(options->requestmask, DHO_DNSDOMAIN); - add_option_mask(options->requestmask, DHO_DNSSEARCH); - add_option_mask(options->requestmask, DHO_NISSERVER); - add_option_mask(options->requestmask, DHO_NISDOMAIN); - add_option_mask(options->requestmask, DHO_NTPSERVER); - - /* If the duid file exists, then enable duid by default - * This means we don't break existing clients that easily :) */ - if ((f = fopen(DUID, "r"))) { - options->options |= DHCPCD_DUID; - fclose(f); - } -#endif - - gethostname(options->hostname + 1, sizeof(options->hostname)); - if (strcmp(options->hostname + 1, "(none)") == 0 || - strcmp(options->hostname + 1, "localhost") == 0) - options->hostname[1] = '\0'; - *options->hostname = strlen(options->hostname + 1); - - while ((opt = getopt_long(argc, argv, OPTS EXTRA_OPTS, - longopts, &option_index)) != -1) - { - switch (opt) { - case 0: - if (longopts[option_index].flag) - break; - logger(LOG_ERR, "option `%s' should set a flag", - longopts[option_index].name); - goto abort; - case 'f': - cf = optarg; - break; - case 'V': - print_options(); - goto abort; - case '?': - usage(); - goto abort; - } - } - - if (doversion) - printf(""PACKAGE" "VERSION"\n%s\n", copyright); - - if (dohelp) - usage(); - - if (optind < argc) { - if (strlen(argv[optind]) >= IF_NAMESIZE) { - logger(LOG_ERR, - "`%s' too long for an interface name (max=%d)", - argv[optind], IF_NAMESIZE); - goto abort; - } - strlcpy(options->interface, argv[optind], - sizeof(options->interface)); - } else { - /* If only version was requested then exit now */ - if (doversion || dohelp) { - retval = 0; - goto abort; - } - - logger(LOG_ERR, "no interface specified"); - goto abort; - } - - /* Parse our options file */ - f = fopen(cf ? cf : CONFIG, "r"); - if (f) { - r = 1; - while ((get_line(&buffer, &len, f))) { - line = buffer; - while ((option = strsep(&line, " \t"))) - if (*option != '\0') - break; - if (!option || *option == '\0' || *option == '#') - continue; - /* Trim leading whitespace */ - if (line) { - while (*line != '\0' && (*line == ' ' || *line == '\t')) - line++; - } - /* Trim trailing whitespace */ - if (line && *line) { - p = line + strlen(line) - 1; - while (p != line && - (*p == ' ' || *p == '\t') && - *(p - 1) != '\\') - *p-- = '\0'; - } - if (strcmp(option, "interface") == 0) { - free(intf); - intf = xstrdup(line); - continue; - } - /* If we're in an interface block don't use these - * options unless it's for us */ - if (intf && strcmp(intf, options->interface) != 0) - continue; - r = parse_config_line(option, line, options); - if (r != 1) - break; - } - free(buffer); - free(intf); - fclose(f); - if (r == 0) - usage(); - if (r != 1) - goto abort; - } else { - if (errno != ENOENT || cf) { - logger(LOG_ERR, "fopen `%s': %s", cf ? cf : CONFIG, - strerror(errno)); - goto abort; - } - } - - optind = 0; - while ((opt = getopt_long(argc, argv, OPTS EXTRA_OPTS, - longopts, &option_index)) != -1) - { - switch (opt) { - case 'd': - debug++; - switch (debug) { - case 1: - setloglevel(LOG_DEBUG); - break; - case 2: - options->options &= ~DHCPCD_DAEMONISE; - break; - } - break; - case 'f': - break; - case 'k': - sig = SIGHUP; - break; - case 'n': - sig = SIGALRM; - break; - case 'x': - sig = SIGTERM; - break; - case 'T': - options->options |= DHCPCD_TEST | DHCPCD_PERSISTENT; - break; -#ifdef CMDLINE_COMPAT - case 'H': /* FALLTHROUGH */ - case 'M': - del_option_mask(options->requestmask, DHO_MTU); - break; - case 'N': - del_option_mask(options->requestmask, DHO_NTPSERVER); - break; - case 'R': - del_option_mask(options->requestmask, DHO_DNSSERVER); - del_option_mask(options->requestmask, DHO_DNSDOMAIN); - del_option_mask(options->requestmask, DHO_DNSSEARCH); - break; - case 'S': - add_option_mask(options->requestmask, DHO_MSCSR); - break; - case 'Y': - del_option_mask(options->requestmask, DHO_NISSERVER); - del_option_mask(options->requestmask, DHO_NISDOMAIN); - break; -#endif - default: - i = parse_option(opt, optarg, options); - if (i == 1) - break; - if (i == 0) - usage(); - goto abort; - } - } - -#ifdef THERE_IS_NO_FORK - options->options &= ~DHCPCD_DAEMONISE; -#endif - -#ifndef ANDROID - /* android runs us as user "dhcp" */ - if (geteuid()) - logger(LOG_WARNING, PACKAGE " will not work correctly unless" - " run as root"); -#endif - - if (options->options & DHCPCD_TEST) { - if (options->options & DHCPCD_REQUEST || - options->options & DHCPCD_INFORM) { - logger(LOG_ERR, - "cannot test with --inform or --request"); - goto abort; - } - - if (options->options & DHCPCD_LASTLEASE) { - logger(LOG_ERR, "cannot test with --lastlease"); - goto abort; - } - - if (sig != 0) { - logger(LOG_ERR, - "cannot test with --release or --renew"); - goto abort; - } - } - - prefix = xmalloc(sizeof(char) * (IF_NAMESIZE + 3)); - snprintf(prefix, IF_NAMESIZE, "%s: ", options->interface); - setlogprefix(prefix); - snprintf(options->pidfile, sizeof(options->pidfile), PIDFILE, - options->interface); - free(prefix); - - if (options->request_address.s_addr == 0 && - (options->options & DHCPCD_INFORM || - options->options & DHCPCD_REQUEST)) - { - errno = 0; - if (get_address(options->interface, - &options->request_address, - &options->request_netmask) != 1) - { - if (errno) - logger(LOG_ERR, "get_address: %s", - strerror(errno)); - else - logger(LOG_ERR, "no existing address"); - goto abort; - } - } - if (IN_LINKLOCAL(ntohl(options->request_address.s_addr))) { - logger(LOG_ERR, - "you are not allowed to request a link local address"); - goto abort; - } - - chdir("/"); - umask(022); - - if (sig != 0 && !(options->options & DHCPCD_DAEMONISED)) { -#ifdef ANDROID - char pidpropname[PROPERTY_KEY_MAX]; - char pidpropval[PROPERTY_VALUE_MAX]; - - i = -1; - if (snprintf(pidpropname, - sizeof(pidpropname), - "dhcp.%s.pid", options->interface) >= PROPERTY_KEY_MAX) { - goto abort; - } - property_get(pidpropname, pidpropval, NULL); - if (strlen(pidpropval) == 0) { - goto abort; - } - pid = atoi(pidpropval); -#else - i = -1; - pid = read_pid(options->pidfile); -#endif - if (pid != 0) - logger(LOG_INFO, "sending signal %d to pid %d", - sig, pid); - - if (!pid || (i = kill(pid, sig))) { - if (sig != SIGALRM) - logger(LOG_ERR, ""PACKAGE" not running"); - unlink(options->pidfile); - } - if (i == 0) { - if (sig == SIGALRM) { - retval = EXIT_SUCCESS; - goto abort; - } - /* Spin until it exits */ - logger(LOG_INFO, "waiting for pid %d to exit", pid); - ts.tv_sec = 0; - ts.tv_nsec = 100000000; /* 10th of a second */ - for(i = 0; i < 100; i++) { - nanosleep(&ts, NULL); - if (read_pid(options->pidfile) == 0) { - retval = EXIT_SUCCESS; - break; - } - } - if (retval != EXIT_SUCCESS) - logger(LOG_ERR, "pid %d failed to exit", pid); - goto abort; - } - if (sig != SIGALRM) - goto abort; - } - - if (!(options->options & DHCPCD_TEST) && - !(options->options & DHCPCD_DAEMONISED)) - { -#ifdef ANDROID - char pidpropname[PROPERTY_KEY_MAX]; - char pidpropval[PROPERTY_VALUE_MAX]; -#endif -#ifndef ANDROID - if ((pid = read_pid(options->pidfile)) > 0 && - kill(pid, 0) == 0) - { - logger(LOG_ERR, ""PACKAGE - " already running on pid %d (%s)", - pid, options->pidfile); - goto abort; - } -#endif - pid_fd = open(options->pidfile, - O_WRONLY | O_CREAT | O_NONBLOCK, 0664); - if (pid_fd == -1) { - logger(LOG_ERR, "open `%s': %s", - options->pidfile, strerror(errno)); - goto abort; - } - - /* Lock the file so that only one instance of dhcpcd runs - * on an interface */ - if (flock(pid_fd, LOCK_EX | LOCK_NB) == -1) { - logger(LOG_ERR, "flock `%s': %s", - options->pidfile, strerror(errno)); - goto abort; - } - - if (set_cloexec(pid_fd) == -1) - goto abort; -#ifdef ANDROID - if (snprintf(pidpropname, - sizeof(pidpropname), - "dhcp.%s.pid", options->interface) >= PROPERTY_KEY_MAX) { - goto abort; - } - if (snprintf(pidpropval, sizeof(pidpropval), "%d", getpid()) >= PROPERTY_VALUE_MAX) { - goto abort; - } - property_set(pidpropname, pidpropval); -#else - writepid(pid_fd, getpid()); -#endif - logger(LOG_INFO, PACKAGE " " VERSION " starting"); - } - - /* Terminate the encapsulated options */ - if (options->vendor[0]) { - options->vendor[0]++; - options->vendor[options->vendor[0]] = DHO_END; - } - - if (dhcp_run(options, &pid_fd) == 0) - retval = EXIT_SUCCESS; - -abort: - /* If we didn't daemonise then we need to punt the pidfile now */ - if (pid_fd > -1) { - close(pid_fd); - unlink(options->pidfile); - } - if (options->environ) { - len = 0; - while (options->environ[len]) - free(options->environ[len++]); - free(options->environ); - } - free(options->blacklist); - free(options); - exit(retval); - /* NOTREACHED */ -} -- cgit v1.2.3