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udhcpc: kill undocumented -W, it was a no-op.
fix option parsing in the case some CONFIG_x are off. disable -b on NOMMU, make backgrounding work correctly (if a bit differently from MMU case). Previously, it wasn't working at all. stop using global data for flags in main(), opt bitfield works as well. function old new delta cryptpw_main 177 153 -24 packed_usage 24478 24452 -26 client_background 26 - -26 udhcpc_main 2462 2372 -90 ------------------------------------------------------------------------------ (add/remove: 0/1 grow/shrink: 0/3 up/down: 0/-166) Total: -166 bytes
This commit is contained in:
Denis Vlasenko
parent
76f812803b
commit
21765fa063
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@ -5,6 +5,17 @@
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* object directory */
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#include "../include/autoconf.h"
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/* Since we can't use platform.h, have to do this again by hand: */
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#if ENABLE_NOMMU
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#define BB_MMU 0
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#define USE_FOR_NOMMU(...) __VA_ARGS__
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#define USE_FOR_MMU(...)
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#else
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#define BB_MMU 1
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#define USE_FOR_NOMMU(...)
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#define USE_FOR_MMU(...) __VA_ARGS__
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#endif
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static const char usage_messages[] = ""
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#define MAKE_USAGE
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#include "usage.h"
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@ -248,12 +248,10 @@ typedef unsigned smalluint;
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(defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
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__UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__)
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#define BB_MMU 0
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#define BB_NOMMU 1
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#define USE_FOR_NOMMU(...) __VA_ARGS__
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#define USE_FOR_MMU(...)
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#else
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#define BB_MMU 1
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/* BB_NOMMU is not defined in this case! */
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#define USE_FOR_NOMMU(...)
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#define USE_FOR_MMU(...) __VA_ARGS__
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#endif
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@ -4246,7 +4246,9 @@
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"\n -O,--request-option=OPT Request DHCP option OPT (cumulative)" \
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"\n -o,--no-default-options Do not request any options (unless -O is also given)" \
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"\n -f,--foreground Run in foreground" \
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USE_FOR_MMU( \
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"\n -b,--background Background if lease is not immediately obtained" \
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) \
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"\n -S,--syslog Log to syslog too" \
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"\n -n,--now Exit with failure if lease is not immediately obtained" \
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"\n -q,--quit Quit after obtaining lease" \
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@ -4273,7 +4275,9 @@
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"\n -O OPT Request DHCP option OPT (cumulative)" \
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"\n -o Do not request any options (unless -O is also given)" \
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"\n -f Run in foreground" \
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USE_FOR_MMU( \
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"\n -b Background if lease is not immediately obtained" \
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) \
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"\n -S Log to syslog too" \
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"\n -n Exit with failure if lease is not immediately obtained" \
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"\n -q Quit after obtaining lease" \
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@ -59,7 +59,7 @@ int correct_password(const struct passwd *pw)
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/* getspnam_r may return 0 yet set result to NULL.
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* At least glibc 2.4 does this. Be extra paranoid here. */
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struct spwd *result = NULL;
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int r = getspnam_r(pw->pw_name, &spw, buffer, sizeof(buffer), &result);
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r = getspnam_r(pw->pw_name, &spw, buffer, sizeof(buffer), &result);
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correct = (r || !result) ? "aa" : result->sp_pwdp;
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}
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#endif
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@ -98,24 +98,15 @@ static void perform_release(uint32_t requested_ip, uint32_t server_addr)
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}
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#if BB_MMU
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static void client_background(void)
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{
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#if !BB_MMU
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bb_error_msg("cannot background in uclinux (yet)");
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/* ... mainly because udhcpc calls client_background()
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* in _the _middle _of _udhcpc _run_, not at the start!
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* If that will be properly disabled for NOMMU, client_background()
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* will work on NOMMU too */
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#else
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bb_daemonize(0);
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logmode &= ~LOGMODE_STDIO;
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/* rewrite pidfile, as our pid is different now */
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write_pidfile(client_config.pidfile);
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#endif
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/* Do not fork again. */
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client_config.foreground = 1;
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client_config.background_if_no_lease = 0;
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}
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#endif
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static uint8_t* alloc_dhcp_option(int code, const char *str, int extra)
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@ -138,9 +129,6 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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char *str_c, *str_V, *str_h, *str_F, *str_r;
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USE_FEATURE_UDHCP_PORT(char *str_P;)
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llist_t *list_O = NULL;
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#if ENABLE_FEATURE_UDHCPC_ARPING
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char *str_W;
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#endif
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int tryagain_timeout = 20;
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int discover_timeout = 3;
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int discover_retries = 3;
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@ -158,41 +146,11 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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struct dhcpMessage packet;
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fd_set rfds;
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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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OPT_S = 1 << 18,
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OPT_A = 1 << 19,
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#if ENABLE_FEATURE_UDHCPC_ARPING
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OPT_a = 1 << 20,
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OPT_W = 1 << 21,
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#endif
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OPT_P = 1 << 22,
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OPT_o = 1 << 23,
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};
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#if ENABLE_GETOPT_LONG
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static const char udhcpc_longopts[] ALIGN1 =
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"clientid\0" Required_argument "c"
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"clientid-none\0" No_argument "C"
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"vendorclass\0" Required_argument "V"
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"foreground\0" No_argument "f"
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"background\0" No_argument "b"
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"hostname\0" Required_argument "H"
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"fqdn\0" Required_argument "F"
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"interface\0" Required_argument "i"
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@ -207,16 +165,62 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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"retries\0" Required_argument "t"
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"tryagain\0" Required_argument "A"
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"syslog\0" No_argument "S"
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"request-option\0" Required_argument "O"
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"no-default-options\0" No_argument "o"
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"foreground\0" No_argument "f"
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"background\0" No_argument "b"
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#if ENABLE_FEATURE_UDHCPC_ARPING
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"arping\0" No_argument "a"
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#endif
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"request-option\0" Required_argument "O"
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#if ENABLE_FEATURE_UDHCP_PORT
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"client-port\0" Required_argument "P"
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#endif
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"no-default-options\0" No_argument "o"
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;
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#endif
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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_H = 1 << 3,
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OPT_h = 1 << 4,
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OPT_F = 1 << 5,
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OPT_i = 1 << 6,
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OPT_n = 1 << 7,
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OPT_p = 1 << 8,
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OPT_q = 1 << 9,
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OPT_R = 1 << 10,
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OPT_r = 1 << 11,
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OPT_s = 1 << 12,
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OPT_T = 1 << 13,
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OPT_t = 1 << 14,
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OPT_v = 1 << 15,
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OPT_S = 1 << 16,
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OPT_A = 1 << 17,
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OPT_O = 1 << 18,
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OPT_o = 1 << 19,
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OPT_f = 1 << 20,
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/* The rest has variable bit positions, need to be clever */
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OPTBIT_f = 20,
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#if BB_MMU
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OPTBIT_b,
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#endif
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#if ENABLE_FEATURE_UDHCPC_ARPING
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OPTBIT_a,
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#endif
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#if ENABLE_FEATURE_UDHCP_PORT
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OPTBIT_P,
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#endif
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#if BB_MMU
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OPT_b = 1 << OPTBIT_b,
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#endif
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#if ENABLE_FEATURE_UDHCPC_ARPING
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OPT_a = 1 << OPTBIT_a,
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#endif
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#if ENABLE_FEATURE_UDHCP_PORT
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OPT_P = 1 << OPTBIT_P,
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#endif
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};
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/* Default options. */
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#if ENABLE_FEATURE_UDHCP_PORT
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SERVER_PORT = 67;
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@ -231,28 +235,21 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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#if ENABLE_GETOPT_LONG
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applet_long_options = udhcpc_longopts;
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#endif
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opt = getopt32(argv, "c:CV:fbH:h:F:i:np:qRr:s:T:t:vSA:"
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USE_FEATURE_UDHCPC_ARPING("aW:")
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opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:vSA:O:of"
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USE_FOR_MMU("b")
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USE_FEATURE_UDHCPC_ARPING("a")
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USE_FEATURE_UDHCP_PORT("P:")
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"O:o"
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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
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, &discover_timeout, &discover_retries, &tryagain_timeout
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USE_FEATURE_UDHCPC_ARPING(, &str_W)
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USE_FEATURE_UDHCP_PORT(, &str_P)
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, &client_config.interface, &client_config.pidfile, &str_r /* i,p */
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, &client_config.script /* s */
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, &discover_timeout, &discover_retries, &tryagain_timeout /* T,t,A */
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, &list_O
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USE_FEATURE_UDHCP_PORT(, &str_P)
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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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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|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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@ -267,28 +264,12 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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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) discover_timeout = xatoi_u(str_T);
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// if (opt & OPT_t) discover_retries = xatoi_u(str_t);
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// if (opt & OPT_A) tryagain_timeout = xatoi_u(str_A);
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if (opt & OPT_v) {
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puts("version "BB_VER);
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return 0;
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}
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if (opt & OPT_S) {
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openlog(applet_name, LOG_PID, LOG_LOCAL0);
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logmode |= LOGMODE_SYSLOG;
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}
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#if ENABLE_FEATURE_UDHCP_PORT
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if (opt & OPT_P) {
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CLIENT_PORT = xatou16(str_P);
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@ -309,6 +290,17 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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if (read_interface(client_config.interface, &client_config.ifindex,
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NULL, client_config.arp))
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return 1;
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#if !BB_MMU
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/* on NOMMU reexec (i.e., background) early */
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if (!(opt & OPT_f)) {
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bb_daemonize_or_rexec(0 /* flags */, argv);
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logmode = 0;
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}
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#endif
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if (opt & OPT_S) {
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openlog(applet_name, LOG_PID, LOG_LOCAL0);
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logmode |= LOGMODE_SYSLOG;
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}
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/* Make sure fd 0,1,2 are open */
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bb_sanitize_stdio();
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@ -317,9 +309,8 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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/* Create pidfile */
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write_pidfile(client_config.pidfile);
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/* if (!..) bb_perror_msg("cannot create pidfile %s", pidfile); */
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/* Goes to stdout and possibly syslog */
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/* Goes to stdout (unless NOMMU) and possibly syslog */
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bb_info_msg("%s (v"BB_VER") started", applet_name);
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/* if not set, and not suppressed, setup the default client ID */
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@ -393,10 +384,15 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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continue;
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}
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udhcp_run_script(NULL, "leasefail");
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if (client_config.background_if_no_lease) {
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#if BB_MMU /* -b is not supported on NOMMU */
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if (opt & OPT_b) { /* background if no lease */
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bb_info_msg("No lease, forking to background");
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client_background();
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} else if (client_config.abort_if_no_lease) {
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/* do not background again! */
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opt = ((opt & ~OPT_b) | OPT_f);
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} else
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#endif
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if (opt & OPT_n) { /* abort if no lease */
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bb_info_msg("No lease, failing");
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retval = 1;
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goto ret;
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@ -584,14 +580,18 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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state = BOUND;
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change_listen_mode(LISTEN_NONE);
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if (client_config.quit_after_lease) {
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if (client_config.release_on_quit)
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if (opt & OPT_q) { /* quit after lease */
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if (opt & OPT_R) /* release on quit */
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perform_release(requested_ip, server_addr);
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goto ret0;
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}
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if (!client_config.foreground)
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#if BB_MMU /* NOMMU case backgrounded earlier */
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if (!(opt & OPT_f)) {
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client_background();
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/* do not background again! */
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opt = ((opt & ~OPT_b) | OPT_f);
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}
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#endif
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already_waited_sec = 0;
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continue; /* back to main loop */
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}
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@ -633,7 +633,7 @@ int udhcpc_main(int argc ATTRIBUTE_UNUSED, char **argv)
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break;
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case SIGTERM:
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bb_info_msg("Received SIGTERM");
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if (client_config.release_on_quit)
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if (opt & OPT_R) /* release on quit */
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perform_release(requested_ip, server_addr);
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goto ret0;
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}
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@ -9,14 +9,15 @@
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#endif
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struct client_config_t {
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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 no_default_options; /* Do not include default optins in request */
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#if ENABLE_FEATURE_UDHCP_PORT
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uint16_t port;
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#endif
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int ifindex; /* Index number of the interface to use */
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uint8_t opt_mask[256 / 8]; /* Bitmask of options to send (-O option) */
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const char *interface; /* The name of the interface to use */
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char *pidfile; /* Optionally store the process ID */
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const char *script; /* User script to run at dhcp events */
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@ -24,16 +25,10 @@ struct client_config_t {
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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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#if ENABLE_FEATURE_UDHCP_PORT
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uint16_t port;
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#endif
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uint8_t arp[6]; /* Our arp address */
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uint8_t opt_mask[256 / 8]; /* Bitmask of options to send (-O option) */
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};
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/* server_config sits in 1st half of bb_common_bufsiz1 */
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#define client_config (*(struct client_config_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE/2]))
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#define client_config (*(struct client_config_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE / 2]))
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#if ENABLE_FEATURE_UDHCP_PORT
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#define CLIENT_PORT (client_config.port)
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