void dhcpv6_ia_write_statefile(void)
{
struct write_ctxt ctxt;
+ unsigned statefile_strlen = strlen(config.dhcp_statefile) + 1;
+ unsigned tmp_statefile_strlen = statefile_strlen + 1; /* space for . */
+ char *tmp_statefile = alloca(tmp_statefile_strlen);
+
+ char *dir_statefile;
+ char *base_statefile;
+ char *pdir_statefile;
+ char *pbase_statefile;
+
+ time_t now = odhcpd_time(), wall_time = time(NULL);
+ int fd, ret;
+ char leasebuf[512];
+
+ if (!config.dhcp_statefile)
+ return;
md5_begin(&ctxt.md5);
+ dir_statefile = strndup(config.dhcp_statefile, statefile_strlen);
+ base_statefile = strndup(config.dhcp_statefile, statefile_strlen);
- if (config.dhcp_statefile) {
- unsigned statefile_strlen = strlen(config.dhcp_statefile) + 1;
- unsigned tmp_statefile_strlen = statefile_strlen + 1; /* space for . */
- char *tmp_statefile = alloca(tmp_statefile_strlen);
+ pdir_statefile = dirname(dir_statefile);
+ pbase_statefile = basename(base_statefile);
- char *dir_statefile;
- char *base_statefile;
- char *pdir_statefile;
- char *pbase_statefile;
+ snprintf(tmp_statefile, tmp_statefile_strlen, "%s/.%s", pdir_statefile, pbase_statefile);
- time_t now = odhcpd_time(), wall_time = time(NULL);
- int fd, ret;
- char leasebuf[512];
+ free(dir_statefile);
+ free(base_statefile);
- dir_statefile = strndup(config.dhcp_statefile, statefile_strlen);
- base_statefile = strndup(config.dhcp_statefile, statefile_strlen);
+ fd = open(tmp_statefile, O_CREAT | O_WRONLY | O_CLOEXEC, 0644);
+ if (fd < 0)
+ return;
- pdir_statefile = dirname(dir_statefile);
- pbase_statefile = basename(base_statefile);
+ ret = lockf(fd, F_LOCK, 0);
+ if (ret < 0) {
+ close(fd);
+ return;
+ }
- snprintf(tmp_statefile, tmp_statefile_strlen, "%s/.%s", pdir_statefile, pbase_statefile);
+ if (ftruncate(fd, 0) < 0) {}
- free(dir_statefile);
- free(base_statefile);
+ ctxt.fp = fdopen(fd, "w");
+ if (!ctxt.fp) {
+ close(fd);
+ return;
+ }
- fd = open(tmp_statefile, O_CREAT | O_WRONLY | O_CLOEXEC, 0644);
- if (fd < 0)
- return;
+ ctxt.buf = leasebuf;
+ ctxt.buf_len = sizeof(leasebuf);
- ret = lockf(fd, F_LOCK, 0);
- if (ret < 0) {
- close(fd);
- return;
- }
+ avl_for_each_element(&interfaces, ctxt.iface, avl) {
+ if (ctxt.iface->dhcpv6 != MODE_SERVER &&
+ ctxt.iface->dhcpv4 != MODE_SERVER)
+ continue;
- if (ftruncate(fd, 0) < 0) {}
+ if (ctxt.iface->dhcpv6 == MODE_SERVER) {
+ list_for_each_entry(ctxt.c, &ctxt.iface->ia_assignments, head) {
+ if (!(ctxt.c->flags & OAF_BOUND))
+ continue;
- ctxt.fp = fdopen(fd, "w");
- if (!ctxt.fp) {
- close(fd);
- return;
- }
+ char duidbuf[DUID_HEXSTRLEN];
- ctxt.buf = leasebuf;
- ctxt.buf_len = sizeof(leasebuf);
+ odhcpd_hexlify(duidbuf, ctxt.c->clid_data, ctxt.c->clid_len);
- avl_for_each_element(&interfaces, ctxt.iface, avl) {
- if (ctxt.iface->dhcpv6 != MODE_SERVER &&
- ctxt.iface->dhcpv4 != MODE_SERVER)
- continue;
+ /* iface DUID iaid hostname lifetime assigned_host_id length [addrs...] */
+ ctxt.buf_idx = snprintf(ctxt.buf, ctxt.buf_len, "# %s %s %x %s%s %"PRId64" ",
+ ctxt.iface->ifname, duidbuf, ntohl(ctxt.c->iaid),
+ (ctxt.c->flags & OAF_BROKEN_HOSTNAME) ? "broken\\x20" : "",
+ (ctxt.c->hostname ? ctxt.c->hostname : "-"),
+ (ctxt.c->valid_until > now ?
+ (int64_t)(ctxt.c->valid_until - now + wall_time) :
+ (INFINITE_VALID(ctxt.c->valid_until) ? -1 : 0)));
- if (ctxt.iface->dhcpv6 == MODE_SERVER) {
- list_for_each_entry(ctxt.c, &ctxt.iface->ia_assignments, head) {
- if (!(ctxt.c->flags & OAF_BOUND))
- continue;
-
- char duidbuf[DUID_HEXSTRLEN];
-
- odhcpd_hexlify(duidbuf, ctxt.c->clid_data, ctxt.c->clid_len);
-
- /* iface DUID iaid hostname lifetime assigned_host_id length [addrs...] */
- ctxt.buf_idx = snprintf(ctxt.buf, ctxt.buf_len, "# %s %s %x %s%s %"PRId64" ",
- ctxt.iface->ifname, duidbuf, ntohl(ctxt.c->iaid),
- (ctxt.c->flags & OAF_BROKEN_HOSTNAME) ? "broken\\x20" : "",
- (ctxt.c->hostname ? ctxt.c->hostname : "-"),
- (ctxt.c->valid_until > now ?
- (int64_t)(ctxt.c->valid_until - now + wall_time) :
- (INFINITE_VALID(ctxt.c->valid_until) ? -1 : 0)));
-
- if (ctxt.c->flags & OAF_DHCPV6_NA)
- ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx, ctxt.buf_len - ctxt.buf_idx,
- "%" PRIx64" %u ", ctxt.c->assigned_host_id, (unsigned)ctxt.c->length);
- else
- ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx, ctxt.buf_len - ctxt.buf_idx,
- "%" PRIx32" %u ", ctxt.c->assigned_subnet_id, (unsigned)ctxt.c->length);
-
- if (INFINITE_VALID(ctxt.c->valid_until) || ctxt.c->valid_until > now)
- dhcpv6_ia_enum_addrs(ctxt.iface, ctxt.c, now,
- dhcpv6_write_ia_addr, &ctxt);
-
- ctxt.buf[ctxt.buf_idx - 1] = '\n';
- fwrite(ctxt.buf, 1, ctxt.buf_idx, ctxt.fp);
- }
+ if (ctxt.c->flags & OAF_DHCPV6_NA)
+ ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx, ctxt.buf_len - ctxt.buf_idx,
+ "%" PRIx64" %u ", ctxt.c->assigned_host_id, (unsigned)ctxt.c->length);
+ else
+ ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx, ctxt.buf_len - ctxt.buf_idx,
+ "%" PRIx32" %u ", ctxt.c->assigned_subnet_id, (unsigned)ctxt.c->length);
+
+ if (INFINITE_VALID(ctxt.c->valid_until) || ctxt.c->valid_until > now)
+ dhcpv6_ia_enum_addrs(ctxt.iface, ctxt.c, now,
+ dhcpv6_write_ia_addr, &ctxt);
+
+ ctxt.buf[ctxt.buf_idx - 1] = '\n';
+ fwrite(ctxt.buf, 1, ctxt.buf_idx, ctxt.fp);
}
+ }
- if (ctxt.iface->dhcpv4 == MODE_SERVER) {
- struct dhcpv4_lease *c;
-
- list_for_each_entry(c, &ctxt.iface->dhcpv4_leases, head) {
- if (!(c->flags & OAF_BOUND))
- continue;
-
- char ipbuf[INET6_ADDRSTRLEN];
- char duidbuf[16];
- odhcpd_hexlify(duidbuf, c->hwaddr, sizeof(c->hwaddr));
-
- /* iface DUID iaid hostname lifetime assigned length [addrs...] */
- ctxt.buf_idx = snprintf(ctxt.buf, ctxt.buf_len, "# %s %s ipv4 %s%s %"PRId64" %x 32 ",
- ctxt.iface->ifname, duidbuf,
- (c->flags & OAF_BROKEN_HOSTNAME) ? "broken\\x20" : "",
- (c->hostname ? c->hostname : "-"),
- (c->valid_until > now ?
- (int64_t)(c->valid_until - now + wall_time) :
- (INFINITE_VALID(c->valid_until) ? -1 : 0)),
- ntohl(c->addr));
-
- struct in_addr addr = {.s_addr = c->addr};
- inet_ntop(AF_INET, &addr, ipbuf, sizeof(ipbuf) - 1);
-
- if (c->hostname && !(c->flags & OAF_BROKEN_HOSTNAME)) {
- fputs(ipbuf, ctxt.fp);
-
- char b[256];
- if (dn_expand(ctxt.iface->search,
- ctxt.iface->search + ctxt.iface->search_len,
- ctxt.iface->search, b, sizeof(b)) > 0)
- fprintf(ctxt.fp, "\t%s.%s", c->hostname, b);
-
- fprintf(ctxt.fp, "\t%s\n", c->hostname);
- md5_hash(ipbuf, strlen(ipbuf), &ctxt.md5);
- md5_hash(c->hostname, strlen(c->hostname), &ctxt.md5);
- }
-
- ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx,
- ctxt.buf_len - ctxt.buf_idx,
- "%s/32 ", ipbuf);
- ctxt.buf[ctxt.buf_idx - 1] = '\n';
- fwrite(ctxt.buf, 1, ctxt.buf_idx, ctxt.fp);
+ if (ctxt.iface->dhcpv4 == MODE_SERVER) {
+ struct dhcpv4_lease *c;
+
+ list_for_each_entry(c, &ctxt.iface->dhcpv4_leases, head) {
+ if (!(c->flags & OAF_BOUND))
+ continue;
+
+ char ipbuf[INET6_ADDRSTRLEN];
+ char duidbuf[16];
+ odhcpd_hexlify(duidbuf, c->hwaddr, sizeof(c->hwaddr));
+
+ /* iface DUID iaid hostname lifetime assigned length [addrs...] */
+ ctxt.buf_idx = snprintf(ctxt.buf, ctxt.buf_len, "# %s %s ipv4 %s%s %"PRId64" %x 32 ",
+ ctxt.iface->ifname, duidbuf,
+ (c->flags & OAF_BROKEN_HOSTNAME) ? "broken\\x20" : "",
+ (c->hostname ? c->hostname : "-"),
+ (c->valid_until > now ?
+ (int64_t)(c->valid_until - now + wall_time) :
+ (INFINITE_VALID(c->valid_until) ? -1 : 0)),
+ ntohl(c->addr));
+
+ struct in_addr addr = {.s_addr = c->addr};
+ inet_ntop(AF_INET, &addr, ipbuf, sizeof(ipbuf) - 1);
+
+ if (c->hostname && !(c->flags & OAF_BROKEN_HOSTNAME)) {
+ fputs(ipbuf, ctxt.fp);
+
+ char b[256];
+ if (dn_expand(ctxt.iface->search,
+ ctxt.iface->search + ctxt.iface->search_len,
+ ctxt.iface->search, b, sizeof(b)) > 0)
+ fprintf(ctxt.fp, "\t%s.%s", c->hostname, b);
+
+ fprintf(ctxt.fp, "\t%s\n", c->hostname);
+ md5_hash(ipbuf, strlen(ipbuf), &ctxt.md5);
+ md5_hash(c->hostname, strlen(c->hostname), &ctxt.md5);
}
+
+ ctxt.buf_idx += snprintf(ctxt.buf + ctxt.buf_idx,
+ ctxt.buf_len - ctxt.buf_idx,
+ "%s/32 ", ipbuf);
+ ctxt.buf[ctxt.buf_idx - 1] = '\n';
+ fwrite(ctxt.buf, 1, ctxt.buf_idx, ctxt.fp);
}
}
+ }
- fclose(ctxt.fp);
+ fclose(ctxt.fp);
- uint8_t newmd5[16];
- md5_end(newmd5, &ctxt.md5);
+ uint8_t newmd5[16];
+ md5_end(newmd5, &ctxt.md5);
- rename(tmp_statefile, config.dhcp_statefile);
+ rename(tmp_statefile, config.dhcp_statefile);
- if (memcmp(newmd5, statemd5, sizeof(newmd5))) {
- memcpy(statemd5, newmd5, sizeof(statemd5));
+ if (memcmp(newmd5, statemd5, sizeof(newmd5))) {
+ memcpy(statemd5, newmd5, sizeof(statemd5));
- dhcpv6_ia_write_hostsfile(now);
+ dhcpv6_ia_write_hostsfile(now);
- if (config.dhcp_cb) {
- char *argv[2] = {config.dhcp_cb, NULL};
- if (!vfork()) {
- execv(argv[0], argv);
- _exit(128);
- }
+ if (config.dhcp_cb) {
+ char *argv[2] = {config.dhcp_cb, NULL};
+ if (!vfork()) {
+ execv(argv[0], argv);
+ _exit(128);
}
}
}
projects / project / odhcpd.git / commitdiff