udhcpc: convert to getopt32
This commit is contained in:
Denis Vlasenko
parent
30d7a346e6
commit
e2d3ded354
@ -1,4 +1,13 @@
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/* vi: set sw=4 ts=4: */
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/*
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* This file suffers from chronically incorrect tabification
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* of messages. Before editing this file:
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* 1. Switch you editor to 8-space tab mode.
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* 2. Do not use \t in messages, use real tab character.
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* 3. Start each source line with message as follows:
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* |<7 spaces>"text with tabs"
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*/
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#ifndef __BB_USAGE_H__
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#define __BB_USAGE_H__
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@ -33,25 +33,8 @@ static int fd = -1;
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#define LISTEN_RAW 2
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static int listen_mode;
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struct client_config_t client_config = {
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/* Default options. */
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.abort_if_no_lease = 0,
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.foreground = 0,
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.quit_after_lease = 0,
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.release_on_quit = 0,
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.background_if_no_lease = 0,
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.interface = "eth0",
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.pidfile = NULL,
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.script = DEFAULT_SCRIPT,
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.clientid = NULL,
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.vendorclass = NULL,
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.hostname = NULL,
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.fqdn = NULL,
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.ifindex = 0,
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.retries = 3,
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.timeout = 3,
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.arp = "\0\0\0\0\0\0", /* appease gcc-3.0 */
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};
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struct client_config_t client_config;
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/* just a little helper */
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static void change_mode(int new_mode)
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@ -126,139 +109,137 @@ static void client_background(void)
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}
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static uint8_t* alloc_dhcp_option(int code, const char *str, int extra)
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{
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uint8_t *storage;
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int len = strlen(str);
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if (len > 255) len = 255;
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storage = xzalloc(len + extra + OPT_DATA);
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storage[OPT_CODE] = code;
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storage[OPT_LEN] = len + extra;
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memcpy(storage + extra + OPT_DATA, str, len);
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return storage;
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}
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int udhcpc_main(int argc, char *argv[])
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{
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uint8_t *temp, *message;
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char *str_c, *str_V, *str_h, *str_F, *str_r, *str_T, *str_t;
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unsigned long t1 = 0, t2 = 0, xid = 0;
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unsigned long start = 0, lease = 0;
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fd_set rfds;
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int retval;
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struct timeval tv;
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int c, len;
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struct dhcpMessage packet;
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struct in_addr temp_addr;
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long now;
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unsigned opt;
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int max_fd;
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int sig;
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int retval;
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int len;
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int no_clientid = 0;
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fd_set rfds;
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struct timeval tv;
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struct dhcpMessage packet;
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struct in_addr temp_addr;
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enum {
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OPT_c = 1 << 0,
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OPT_C = 1 << 1,
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OPT_V = 1 << 2,
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OPT_f = 1 << 3,
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OPT_b = 1 << 4,
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OPT_H = 1 << 5,
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OPT_h = 1 << 6,
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OPT_F = 1 << 7,
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OPT_i = 1 << 8,
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OPT_n = 1 << 9,
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OPT_p = 1 << 10,
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OPT_q = 1 << 11,
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OPT_R = 1 << 12,
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OPT_r = 1 << 13,
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OPT_s = 1 << 14,
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OPT_T = 1 << 15,
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OPT_t = 1 << 16,
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OPT_v = 1 << 17,
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};
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static const struct option arg_options[] = {
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{"clientid", required_argument, 0, 'c'},
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{"clientid-none", no_argument, 0, 'C'},
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{"vendorclass", required_argument, 0, 'V'},
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{"foreground", no_argument, 0, 'f'},
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{"background", no_argument, 0, 'b'},
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{"hostname", required_argument, 0, 'H'},
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{"hostname", required_argument, 0, 'h'},
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{"fqdn", required_argument, 0, 'F'},
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{"interface", required_argument, 0, 'i'},
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{"now", no_argument, 0, 'n'},
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{"pidfile", required_argument, 0, 'p'},
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{"quit", no_argument, 0, 'q'},
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{"release", no_argument, 0, 'R'},
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{"request", required_argument, 0, 'r'},
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{"script", required_argument, 0, 's'},
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{"timeout", required_argument, 0, 'T'},
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{"version", no_argument, 0, 'v'},
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{"retries", required_argument, 0, 't'},
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{0, 0, 0, 0}
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{ "clientid", required_argument, 0, 'c' },
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{ "clientid-none", no_argument, 0, 'C' },
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{ "vendorclass", required_argument, 0, 'V' },
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{ "foreground", no_argument, 0, 'f' },
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{ "background", no_argument, 0, 'b' },
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{ "hostname", required_argument, 0, 'H' },
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{ "hostname", required_argument, 0, 'h' },
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{ "fqdn", required_argument, 0, 'F' },
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{ "interface", required_argument, 0, 'i' },
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{ "now", no_argument, 0, 'n' },
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{ "pidfile", required_argument, 0, 'p' },
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{ "quit", no_argument, 0, 'q' },
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{ "release", no_argument, 0, 'R' },
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{ "request", required_argument, 0, 'r' },
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{ "script", required_argument, 0, 's' },
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{ "timeout", required_argument, 0, 'T' },
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{ "version", no_argument, 0, 'v' },
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{ "retries", required_argument, 0, 't' },
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{ 0, 0, 0, 0 }
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};
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/* get options */
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while (1) {
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int option_index = 0;
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c = getopt_long(argc, argv, "c:CV:fbH:h:F:i:np:qRr:s:T:t:v", arg_options, &option_index);
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if (c == -1) break;
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/* Default options. */
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client_config.interface = "eth0";
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client_config.script = DEFAULT_SCRIPT;
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client_config.retries = 3;
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client_config.timeout = 3;
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switch (c) {
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case 'c':
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if (no_clientid) bb_show_usage();
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len = strlen(optarg) > 255 ? 255 : strlen(optarg);
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free(client_config.clientid);
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client_config.clientid = xmalloc(len + 2);
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client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
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client_config.clientid[OPT_LEN] = len;
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client_config.clientid[OPT_DATA] = '\0';
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strncpy((char*)client_config.clientid + OPT_DATA, optarg, len);
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break;
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case 'C':
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if (client_config.clientid) bb_show_usage();
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no_clientid = 1;
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break;
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case 'V':
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len = strlen(optarg) > 255 ? 255 : strlen(optarg);
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free(client_config.vendorclass);
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client_config.vendorclass = xmalloc(len + 2);
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client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
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client_config.vendorclass[OPT_LEN] = len;
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strncpy((char*)client_config.vendorclass + OPT_DATA, optarg, len);
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break;
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case 'f':
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client_config.foreground = 1;
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break;
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case 'b':
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client_config.background_if_no_lease = 1;
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break;
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case 'h':
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case 'H':
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len = strlen(optarg) > 255 ? 255 : strlen(optarg);
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free(client_config.hostname);
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client_config.hostname = xmalloc(len + 2);
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client_config.hostname[OPT_CODE] = DHCP_HOST_NAME;
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client_config.hostname[OPT_LEN] = len;
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strncpy((char*)client_config.hostname + 2, optarg, len);
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break;
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case 'F':
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len = strlen(optarg) > 255 ? 255 : strlen(optarg);
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free(client_config.fqdn);
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client_config.fqdn = xmalloc(len + 5);
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client_config.fqdn[OPT_CODE] = DHCP_FQDN;
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client_config.fqdn[OPT_LEN] = len + 3;
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/* Flags: 0000NEOS
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S: 1 => Client requests Server to update A RR in DNS as well as PTR
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O: 1 => Server indicates to client that DNS has been updated regardless
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E: 1 => Name data is DNS format, i.e. <4>host<6>domain<4>com<0> not "host.domain.com"
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N: 1 => Client requests Server to not update DNS
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*/
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client_config.fqdn[OPT_LEN + 1] = 0x1;
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client_config.fqdn[OPT_LEN + 2] = 0;
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client_config.fqdn[OPT_LEN + 3] = 0;
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strncpy((char*)client_config.fqdn + 5, optarg, len);
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break;
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case 'i':
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client_config.interface = optarg;
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break;
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case 'n':
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client_config.abort_if_no_lease = 1;
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break;
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case 'p':
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client_config.pidfile = optarg;
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break;
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case 'q':
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client_config.quit_after_lease = 1;
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break;
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case 'R':
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client_config.release_on_quit = 1;
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break;
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case 'r':
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requested_ip = inet_addr(optarg);
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break;
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case 's':
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client_config.script = optarg;
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break;
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case 'T':
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client_config.timeout = xatoi_u(optarg);
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break;
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case 't':
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client_config.retries = xatoi_u(optarg);
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break;
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case 'v':
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printf("version %s\n\n", BB_VER);
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return 0;
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break;
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default:
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bb_show_usage();
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}
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/* Parse command line */
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opt_complementary = "?:c--C:C--c" // mutually exclusive
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":hH:Hh"; // -h and -H are the same
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applet_long_options = arg_options;
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opt = getopt32(argc, argv, "c:CV:fbH:h:F:i:np:qRr:s:T:t:v",
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&str_c, &str_V, &str_h, &str_h, &str_F,
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&client_config.interface, &client_config.pidfile, &str_r,
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&client_config.script, &str_T, &str_t
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);
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if (opt & OPT_c)
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client_config.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, str_c, 0);
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if (opt & OPT_C)
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no_clientid = 1;
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if (opt & OPT_V)
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client_config.vendorclass = alloc_dhcp_option(DHCP_VENDOR, str_V, 0);
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if (opt & OPT_f)
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client_config.foreground = 1;
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if (opt & OPT_b)
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client_config.background_if_no_lease = 1;
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if (opt & OPT_h)
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client_config.hostname = alloc_dhcp_option(DHCP_HOST_NAME, str_h, 0);
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if (opt & OPT_F) {
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client_config.fqdn = alloc_dhcp_option(DHCP_FQDN, str_F, 3);
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/* Flags: 0000NEOS
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S: 1 => Client requests Server to update A RR in DNS as well as PTR
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O: 1 => Server indicates to client that DNS has been updated regardless
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E: 1 => Name data is DNS format, i.e. <4>host<6>domain<4>com<0> not "host.domain.com"
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N: 1 => Client requests Server to not update DNS
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*/
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client_config.fqdn[OPT_DATA + 0] = 0x1;
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/* client_config.fqdn[OPT_DATA + 1] = 0; - redundant */
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/* client_config.fqdn[OPT_DATA + 2] = 0; - redundant */
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}
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// if (opt & OPT_i) client_config.interface = ...
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if (opt & OPT_n)
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client_config.abort_if_no_lease = 1;
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// if (opt & OPT_p) client_config.pidfile = ...
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if (opt & OPT_q)
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client_config.quit_after_lease = 1;
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if (opt & OPT_R)
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client_config.release_on_quit = 1;
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if (opt & OPT_r)
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requested_ip = inet_addr(str_r);
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// if (opt & OPT_s) client_config.script = ...
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if (opt & OPT_T)
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client_config.timeout = xatoi_u(str_T);
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if (opt & OPT_t)
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client_config.retries = xatoi_u(str_t);
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if (opt & OPT_v) {
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printf("version %s\n\n", BB_VER);
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return 0;
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}
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/* Start the log, sanitize fd's, and write a pid file */
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@ -270,22 +251,13 @@ int udhcpc_main(int argc, char *argv[])
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/* if not set, and not suppressed, setup the default client ID */
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if (!client_config.clientid && !no_clientid) {
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client_config.clientid = xmalloc(6 + 3);
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client_config.clientid[OPT_CODE] = DHCP_CLIENT_ID;
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client_config.clientid[OPT_LEN] = 7;
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client_config.clientid = alloc_dhcp_option(DHCP_CLIENT_ID, "", 7);
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client_config.clientid[OPT_DATA] = 1;
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memcpy(client_config.clientid + 3, client_config.arp, 6);
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}
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if (!client_config.vendorclass) {
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client_config.vendorclass = xmalloc(sizeof("udhcp "BB_VER) + 2);
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client_config.vendorclass[OPT_CODE] = DHCP_VENDOR;
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client_config.vendorclass[OPT_LEN] = sizeof("udhcp "BB_VER) - 1;
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client_config.vendorclass[OPT_DATA] = 1;
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memcpy(&client_config.vendorclass[OPT_DATA],
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"udhcp "BB_VER, sizeof("udhcp "BB_VER) - 1);
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memcpy(client_config.clientid + OPT_DATA+1, client_config.arp, 6);
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}
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if (!client_config.vendorclass)
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client_config.vendorclass = alloc_dhcp_option(DHCP_VENDOR, "udhcp "BB_VER, 0);
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/* setup the signal pipe */
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udhcp_sp_setup();
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@ -295,7 +267,6 @@ int udhcpc_main(int argc, char *argv[])
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change_mode(LISTEN_RAW);
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for (;;) {
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tv.tv_sec = timeout - uptime();
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tv.tv_usec = 0;
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@ -13,22 +13,24 @@
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#define RELEASED 7
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struct client_config_t {
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char foreground; /* Do not fork */
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char quit_after_lease; /* Quit after obtaining lease */
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char release_on_quit; /* perform release on quit */
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char abort_if_no_lease; /* Abort if no lease */
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char background_if_no_lease; /* Fork to background if no lease */
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char *interface; /* The name of the interface to use */
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char *pidfile; /* Optionally store the process ID */
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char *script; /* User script to run at dhcp events */
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uint8_t *clientid; /* Optional client id to use */
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uint8_t *vendorclass; /* Optional vendor class-id to use */
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uint8_t *hostname; /* Optional hostname to use */
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uint8_t *fqdn; /* Optional fully qualified domain name to use */
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int ifindex; /* Index number of the interface to use */
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int retries; /* Max number of request packets */
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int timeout; /* Number of seconds to try to get a lease */
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uint8_t arp[6]; /* Our arp address */
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/* TODO: combine flag fields into single "unsigned opt" */
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/* (can be set directly to the result of getopt32) */
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char foreground; /* Do not fork */
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char quit_after_lease; /* Quit after obtaining lease */
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char release_on_quit; /* perform release on quit */
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char abort_if_no_lease; /* Abort if no lease */
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char background_if_no_lease; /* Fork to background if no lease */
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char *interface; /* The name of the interface to use */
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char *pidfile; /* Optionally store the process ID */
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char *script; /* User script to run at dhcp events */
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uint8_t *clientid; /* Optional client id to use */
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uint8_t *vendorclass; /* Optional vendor class-id to use */
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uint8_t *hostname; /* Optional hostname to use */
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uint8_t *fqdn; /* Optional fully qualified domain name to use */
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int ifindex; /* Index number of the interface to use */
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int retries; /* Max number of request packets */
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int timeout; /* Number of seconds to try to get a lease */
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uint8_t arp[6]; /* Our arp address */
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};
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extern struct client_config_t client_config;
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@ -68,11 +68,13 @@ int udhcpd_main(int argc, char *argv[])
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timeout_end = time(0) + server_config.auto_time;
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while (1) { /* loop until universe collapses */
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if (server_socket < 0)
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if ((server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface)) < 0) {
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if (server_socket < 0) {
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server_socket = listen_socket(INADDR_ANY, SERVER_PORT, server_config.interface);
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if (server_socket < 0) {
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bb_perror_msg("FATAL: cannot create server socket");
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return 2;
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}
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}
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max_sock = udhcp_sp_fd_set(&rfds, server_socket);
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if (server_config.auto_time) {
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