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220 lines
7.3 KiB
Diff
220 lines
7.3 KiB
Diff
diff -x CVS -urN dnsmasq-1.18/dhcp.c dnsmasq.old/dhcp.c
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--- dnsmasq-1.18/dhcp.c 2003-11-05 08:30:20.000000000 -0600
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+++ dnsmasq.old/dhcp.c 2004-01-05 23:40:11.000000000 -0600
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@@ -15,14 +15,20 @@
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#include "dnsmasq.h"
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-static int next_token (char *token, int buffsize, FILE * fp);
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+struct dhcpOfferedAddr {
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+ u_int8_t hostname[16];
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+ u_int8_t chaddr[16];
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+ u_int32_t yiaddr; /* network order */
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+ u_int32_t expires; /* host order */
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+};
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void load_dhcp(char *file, char *suffix, time_t now, char *hostname)
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{
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- char token[MAXTOK], *dot;
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+ char *dot;
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struct all_addr host_address;
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- time_t ttd, tts;
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+ time_t ttd;
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FILE *fp = fopen (file, "r");
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+ struct dhcpOfferedAddr lease;
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if (!fp)
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{
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@@ -34,154 +40,45 @@
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/* remove all existing DHCP cache entries */
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cache_unhash_dhcp();
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-
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- while ((next_token(token, MAXTOK, fp)))
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- {
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- if (strcmp(token, "lease") == 0)
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- {
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- hostname[0] = '\0';
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- ttd = tts = (time_t)(-1);
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-#ifdef HAVE_IPV6
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- if (next_token(token, MAXTOK, fp) &&
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- inet_pton(AF_INET, token, &host_address))
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-#else
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- if (next_token(token, MAXTOK, fp) &&
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- (host_address.addr4.s_addr = inet_addr(token)) != (in_addr_t) -1)
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-#endif
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- {
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- if (next_token(token, MAXTOK, fp) && *token == '{')
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- {
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- while (next_token(token, MAXTOK, fp) && *token != '}')
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+
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+ while (fread(&lease, sizeof(lease), 1, fp)) {
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+ host_address.addr.addr4.s_addr = lease.yiaddr;
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+
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+ strcpy(hostname,lease.hostname);
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+ if (lease.expires>(unsigned)now)
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+ ttd = lease.expires;
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+ else
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+ ttd = -1;
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+ dot = strchr(hostname, '.');
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+ if (suffix)
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{
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- if ((strcmp(token, "client-hostname") == 0) ||
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- (strcmp(token, "hostname") == 0))
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- {
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- if (next_token(hostname, MAXDNAME, fp))
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- if (!canonicalise(hostname))
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- {
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- *hostname = 0;
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- syslog(LOG_ERR, "bad name in %s", file);
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- }
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- }
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- else if ((strcmp(token, "ends") == 0) ||
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- (strcmp(token, "starts") == 0))
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- {
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- struct tm lease_time;
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- int is_ends = (strcmp(token, "ends") == 0);
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- if (next_token(token, MAXTOK, fp) && /* skip weekday */
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- next_token(token, MAXTOK, fp) && /* Get date from lease file */
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- sscanf (token, "%d/%d/%d",
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- &lease_time.tm_year,
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- &lease_time.tm_mon,
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- &lease_time.tm_mday) == 3 &&
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- next_token(token, MAXTOK, fp) &&
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- sscanf (token, "%d:%d:%d:",
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- &lease_time.tm_hour,
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- &lease_time.tm_min,
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- &lease_time.tm_sec) == 3)
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- {
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- /* There doesn't seem to be a universally available library function
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- which converts broken-down _GMT_ time to seconds-in-epoch.
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- The following was borrowed from ISC dhcpd sources, where
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- it is noted that it might not be entirely accurate for odd seconds.
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- Since we're trying to get the same answer as dhcpd, that's just
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- fine here. */
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- static int months [11] = { 31, 59, 90, 120, 151, 181,
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- 212, 243, 273, 304, 334 };
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- time_t time = ((((((365 * (lease_time.tm_year - 1970) + /* Days in years since '70 */
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- (lease_time.tm_year - 1969) / 4 + /* Leap days since '70 */
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- (lease_time.tm_mon > 1 /* Days in months this year */
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- ? months [lease_time.tm_mon - 2]
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- : 0) +
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- (lease_time.tm_mon > 2 && /* Leap day this year */
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- !((lease_time.tm_year - 1972) & 3)) +
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- lease_time.tm_mday - 1) * 24) + /* Day of month */
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- lease_time.tm_hour) * 60) +
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- lease_time.tm_min) * 60) + lease_time.tm_sec;
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- if (is_ends)
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- ttd = time;
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- else
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- tts = time; }
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+ if (dot)
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+ { /* suffix and lease has ending: must match */
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+ if (strcmp(dot+1, suffix) != 0)
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+ syslog(LOG_WARNING,
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+ "Ignoring DHCP lease for %s because it has an illegal domain part", hostname);
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+ else
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+ cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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}
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- }
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-
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- /* missing info? */
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- if (!*hostname)
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- continue;
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- if (ttd == (time_t)(-1))
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- continue;
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-
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- /* infinite lease to is represented by -1 */
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- /* This makes is to the lease file as
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- start time one less than end time. */
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- /* We use -1 as infinite in ttd */
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- if ((tts != -1) && (ttd == tts - 1))
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- ttd = (time_t)(-1);
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- else if (ttd < now)
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- continue;
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-
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- dot = strchr(hostname, '.');
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- if (suffix)
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- {
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- if (dot)
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- { /* suffix and lease has ending: must match */
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- if (strcmp(dot+1, suffix) != 0)
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- syslog(LOG_WARNING,
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- "Ignoring DHCP lease for %s because it has an illegal domain part", hostname);
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- else
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- cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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- }
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- else
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- { /* suffix exists but lease has no ending - add lease and lease.suffix */
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- cache_add_dhcp_entry(hostname, &host_address, ttd, 0);
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- strncat(hostname, ".", MAXDNAME);
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- strncat(hostname, suffix, MAXDNAME);
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- hostname[MAXDNAME-1] = 0; /* in case strncat hit limit */
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- /* Make FQDN canonical for reverse lookups */
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- cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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- }
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- }
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- else
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- { /* no suffix */
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- if (dot) /* no lease ending allowed */
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- syslog(LOG_WARNING,
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- "Ignoring DHCP lease for %s because it has a domain part", hostname);
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- else
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- cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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- }
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- }
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- }
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- }
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- }
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+ else
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+ { /* suffix exists but lease has no ending - add lease and lease.suffix */
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+ cache_add_dhcp_entry(hostname, &host_address, ttd, 0);
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+ strncat(hostname, ".", MAXDNAME);
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+ strncat(hostname, suffix, MAXDNAME);
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+ hostname[MAXDNAME-1] = 0; /* in case strncat hit limit */
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+ /* Make FQDN canonical for reverse lookups */
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+ cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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+ }
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+ }
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+ else
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+ { /* no suffix */
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+ if (dot) /* no lease ending allowed */
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+ syslog(LOG_WARNING,
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+ "Ignoring DHCP lease for %s because it has a domain part", hostname);
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+ else
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+ cache_add_dhcp_entry(hostname, &host_address, ttd, F_REVERSE);
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+ }
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+ }
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fclose(fp);
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}
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-
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-static int next_token (char *token, int buffsize, FILE * fp)
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-{
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- int c, count = 0;
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- char *cp = token;
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-
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- while((c = getc(fp)) != EOF)
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- {
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- if (c == '#')
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- do { c = getc(fp); } while (c != '\n' && c != EOF);
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-
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- if (c == ' ' || c == '\t' || c == '\n' || c == ';')
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- {
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- if (count)
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- break;
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- }
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- else if ((c != '"') && (count<buffsize-1))
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- {
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- *cp++ = c;
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- count++;
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- }
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- }
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-
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- *cp = 0;
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- return count ? 1 : 0;
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-}
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-
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-
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-
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