From 78af19df5138759bbd008aeb8a332b21da0bc8b1 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sun, 10 Nov 2013 18:25:18 -0600 Subject: dumpleases (for dhcpd) submitted by Ashwini Sharma. --- toys/pending/dumpleases.c | 78 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 toys/pending/dumpleases.c diff --git a/toys/pending/dumpleases.c b/toys/pending/dumpleases.c new file mode 100644 index 00000000..b3ce4a9c --- /dev/null +++ b/toys/pending/dumpleases.c @@ -0,0 +1,78 @@ +/* dumpleases.c - Dump the leases granted by udhcpd. + * + * Copyright 2013 Sandeep Sharma + * Copyright 2013 Kyungwan Han + * + +USE_DUMPLEASES(NEWTOY(dumpleases, ">0arf:[!ar]", TOYFLAG_USR|TOYFLAG_BIN)) + +config DUMPLEASES + bool "dumpleases" + default n + help + Usage: dumpleases [-r|-a] [-f LEASEFILE] + + Display DHCP leases granted by udhcpd + -f FILE, Lease file + -r Show remaining time + -a Show expiration time +*/ + +#define FOR_dumpleases +#include "toys.h" +#include "toynet.h" + +GLOBALS( + char *file; +) + +//lease structure +struct lease { + uint32_t expires; + uint32_t lease_nip; + uint8_t lease_mac[6]; + char hostname[20]; + uint8_t pad[2]; //Padding +}; + +void dumpleases_main(void) +{ + struct in_addr addr; + struct lease lease_struct; + int64_t written_time , current_time, exp; + int i, fd; + + if(!(toys.optflags & FLAG_f)) TT.file = "/var/lib/misc/udhcpd.leases"; //DEF_LEASE_FILE + fd = xopen(TT.file, O_RDONLY); + xprintf("Mac Address IP Address Host Name Expires %s\n", (toys.optflags & FLAG_a) ? "at" : "in"); + xread(fd, &written_time, sizeof(written_time)); + current_time = time(NULL); + written_time = SWAP_BE64(written_time); + if(current_time < written_time) written_time = current_time; + + while(sizeof(lease_struct) == + (readall(fd, &lease_struct, sizeof(lease_struct)))) { + for (i = 0; i < 6; i++) printf(":%02x"+ !i, lease_struct.lease_mac[i]); + + addr.s_addr = lease_struct.lease_nip; + lease_struct.hostname[19] = '\0'; + xprintf(" %-16s%-20s", inet_ntoa(addr), lease_struct.hostname ); + exp = ntohl(lease_struct.expires) + written_time; + if (exp <= current_time) { + xputs("expired"); + continue; + } + if (!(toys.optflags & FLAG_a)) { + unsigned dt, hr, m; + unsigned expires = exp - current_time; + dt = expires / (24*60*60); expires %= (24*60*60); + hr = expires / (60*60); expires %= (60*60); + m = expires / 60; expires %= 60; + if (dt) xprintf("%u days ", dt); + xprintf("%02u:%02u:%02u\n", hr, m, (unsigned)expires); + } else { + fputs(ctime((const time_t*)&exp), stdout); + } + } + xclose(fd); +} -- cgit v1.2.3