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-rw-r--r--networking/udhcp/files.c234
1 files changed, 0 insertions, 234 deletions
diff --git a/networking/udhcp/files.c b/networking/udhcp/files.c
deleted file mode 100644
index b224253..0000000
--- a/networking/udhcp/files.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * DHCP server config and lease file manipulation
- *
- * Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
- *
- * Licensed under GPLv2, see file LICENSE in this source tree.
- */
-#include <netinet/ether.h>
-
-#include "common.h"
-#include "dhcpd.h"
-
-/* on these functions, make sure your datatype matches */
-static int FAST_FUNC read_str(const char *line, void *arg)
-{
- char **dest = arg;
-
- free(*dest);
- *dest = xstrdup(line);
- return 1;
-}
-
-static int FAST_FUNC read_u32(const char *line, void *arg)
-{
- *(uint32_t*)arg = bb_strtou32(line, NULL, 10);
- return errno == 0;
-}
-
-static int FAST_FUNC read_staticlease(const char *const_line, void *arg)
-{
- char *line;
- char *mac_string;
- char *ip_string;
- struct ether_addr mac_bytes; /* it's "struct { uint8_t mac[6]; }" */
- uint32_t nip;
-
- /* Read mac */
- line = (char *) const_line;
- mac_string = strtok_r(line, " \t", &line);
- if (!mac_string || !ether_aton_r(mac_string, &mac_bytes))
- return 0;
-
- /* Read ip */
- ip_string = strtok_r(NULL, " \t", &line);
- if (!ip_string || !udhcp_str2nip(ip_string, &nip))
- return 0;
-
- add_static_lease(arg, (uint8_t*) &mac_bytes, nip);
-
- log_static_leases(arg);
-
- return 1;
-}
-
-
-struct config_keyword {
- const char *keyword;
- int (*handler)(const char *line, void *var) FAST_FUNC;
- unsigned ofs;
- const char *def;
-};
-
-#define OFS(field) offsetof(struct server_config_t, field)
-
-static const struct config_keyword keywords[] = {
- /* keyword handler variable address default */
- {"start" , udhcp_str2nip , OFS(start_ip ), "192.168.0.20"},
- {"end" , udhcp_str2nip , OFS(end_ip ), "192.168.0.254"},
- {"interface" , read_str , OFS(interface ), "eth0"},
- /* Avoid "max_leases value not sane" warning by setting default
- * to default_end_ip - default_start_ip + 1: */
- {"max_leases" , read_u32 , OFS(max_leases ), "235"},
- {"auto_time" , read_u32 , OFS(auto_time ), "7200"},
- {"decline_time" , read_u32 , OFS(decline_time ), "3600"},
- {"conflict_time", read_u32 , OFS(conflict_time), "3600"},
- {"offer_time" , read_u32 , OFS(offer_time ), "60"},
- {"min_lease" , read_u32 , OFS(min_lease_sec), "60"},
- {"lease_file" , read_str , OFS(lease_file ), LEASES_FILE},
- {"pidfile" , read_str , OFS(pidfile ), "/var/run/udhcpd.pid"},
- {"siaddr" , udhcp_str2nip , OFS(siaddr_nip ), "0.0.0.0"},
- /* keywords with no defaults must be last! */
- {"option" , udhcp_str2optset, OFS(options ), ""},
- {"opt" , udhcp_str2optset, OFS(options ), ""},
- {"notify_file" , read_str , OFS(notify_file ), NULL},
- {"sname" , read_str , OFS(sname ), NULL},
- {"boot_file" , read_str , OFS(boot_file ), NULL},
- {"static_lease" , read_staticlease, OFS(static_leases), ""},
-};
-enum { KWS_WITH_DEFAULTS = ARRAY_SIZE(keywords) - 6 };
-
-void FAST_FUNC read_config(const char *file)
-{
- parser_t *parser;
- const struct config_keyword *k;
- unsigned i;
- char *token[2];
-
- for (i = 0; i < KWS_WITH_DEFAULTS; i++)
- keywords[i].handler(keywords[i].def, (char*)&server_config + keywords[i].ofs);
-
- parser = config_open(file);
- while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL)) {
- for (k = keywords, i = 0; i < ARRAY_SIZE(keywords); k++, i++) {
- if (strcasecmp(token[0], k->keyword) == 0) {
- if (!k->handler(token[1], (char*)&server_config + k->ofs)) {
- bb_error_msg("can't parse line %u in %s",
- parser->lineno, file);
- /* reset back to the default value */
- k->handler(k->def, (char*)&server_config + k->ofs);
- }
- break;
- }
- }
- }
- config_close(parser);
-
- server_config.start_ip = ntohl(server_config.start_ip);
- server_config.end_ip = ntohl(server_config.end_ip);
-}
-
-void FAST_FUNC write_leases(void)
-{
- int fd;
- unsigned i;
- leasetime_t curr;
- int64_t written_at;
-
- fd = open_or_warn(server_config.lease_file, O_WRONLY|O_CREAT|O_TRUNC);
- if (fd < 0)
- return;
-
- curr = written_at = time(NULL);
-
- written_at = SWAP_BE64(written_at);
- full_write(fd, &written_at, sizeof(written_at));
-
- for (i = 0; i < server_config.max_leases; i++) {
- leasetime_t tmp_time;
-
- if (g_leases[i].lease_nip == 0)
- continue;
-
- /* Screw with the time in the struct, for easier writing */
- tmp_time = g_leases[i].expires;
-
- g_leases[i].expires -= curr;
- if ((signed_leasetime_t) g_leases[i].expires < 0)
- g_leases[i].expires = 0;
- g_leases[i].expires = htonl(g_leases[i].expires);
-
- /* No error check. If the file gets truncated,
- * we lose some leases on restart. Oh well. */
- full_write(fd, &g_leases[i], sizeof(g_leases[i]));
-
- /* Then restore it when done */
- g_leases[i].expires = tmp_time;
- }
- close(fd);
-
- if (server_config.notify_file) {
- char *argv[3];
- argv[0] = server_config.notify_file;
- argv[1] = server_config.lease_file;
- argv[2] = NULL;
- spawn_and_wait(argv);
- }
-}
-
-void FAST_FUNC read_leases(const char *file)
-{
- struct dyn_lease lease;
- int64_t written_at, time_passed;
- int fd;
-#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
- unsigned i = 0;
-#endif
-
- fd = open_or_warn(file, O_RDONLY);
- if (fd < 0)
- return;
-
- if (full_read(fd, &written_at, sizeof(written_at)) != sizeof(written_at))
- goto ret;
- written_at = SWAP_BE64(written_at);
-
- time_passed = time(NULL) - written_at;
- /* Strange written_at, or lease file from old version of udhcpd
- * which had no "written_at" field? */
- if ((uint64_t)time_passed > 12 * 60 * 60)
- goto ret;
-
- while (full_read(fd, &lease, sizeof(lease)) == sizeof(lease)) {
- uint32_t y = ntohl(lease.lease_nip);
- if (y >= server_config.start_ip && y <= server_config.end_ip) {
- signed_leasetime_t expires = ntohl(lease.expires) - (signed_leasetime_t)time_passed;
- uint32_t static_nip;
-
- if (expires <= 0)
- /* We keep expired leases: add_lease() will add
- * a lease with 0 seconds remaining.
- * Fewer IP address changes this way for mass reboot scenario.
- */
- expires = 0;
-
- /* Check if there is a different static lease for this IP or MAC */
- static_nip = get_static_nip_by_mac(server_config.static_leases, lease.lease_mac);
- if (static_nip) {
- /* NB: we do not add lease even if static_nip == lease.lease_nip.
- */
- continue;
- }
- if (is_nip_reserved(server_config.static_leases, lease.lease_nip))
- continue;
-
- /* NB: add_lease takes "relative time", IOW,
- * lease duration, not lease deadline. */
- if (add_lease(lease.lease_mac, lease.lease_nip,
- expires,
- lease.hostname, sizeof(lease.hostname)
- ) == 0
- ) {
- bb_error_msg("too many leases while loading %s", file);
- break;
- }
-#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1
- i++;
-#endif
- }
- }
- log1("read %d leases", i);
- ret:
- close(fd);
-}
generated by cgit v1.1 at 2024-12-28 23:37:35 +0000