From 787140df3992ccc3ebdc09f6d2dcb584f580f49f Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Thu, 23 Mar 2006 23:44:29 +0000 Subject: remove in place of external link --- networking/udhcp/files.c | 393 ----------------------------------------------- 1 file changed, 393 deletions(-) delete mode 100644 networking/udhcp/files.c (limited to 'networking/udhcp/files.c') diff --git a/networking/udhcp/files.c b/networking/udhcp/files.c deleted file mode 100644 index fe853c7cc..000000000 --- a/networking/udhcp/files.c +++ /dev/null @@ -1,393 +0,0 @@ -/* - * files.c -- DHCP server file manipulation * - * Rewrite by Russ Dill July 2001 - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include "static_leases.h" - -#include "dhcpd.h" -#include "options.h" -#include "files.h" -#include "common.h" - -/* - * Domain names may have 254 chars, and string options can be 254 - * chars long. However, 80 bytes will be enough for most, and won't - * hog up memory. If you have a special application, change it - */ -#define READ_CONFIG_BUF_SIZE 80 - -/* on these functions, make sure you datatype matches */ -static int read_ip(const char *line, void *arg) -{ - struct in_addr *addr = arg; - struct hostent *host; - int retval = 1; - - if (!inet_aton(line, addr)) { - if ((host = gethostbyname(line))) - addr->s_addr = *((unsigned long *) host->h_addr_list[0]); - else retval = 0; - } - return retval; -} - -static int read_mac(const char *line, void *arg) -{ - uint8_t *mac_bytes = arg; - struct ether_addr *temp_ether_addr; - int retval = 1; - - temp_ether_addr = ether_aton(line); - - if(temp_ether_addr == NULL) - retval = 0; - else - memcpy(mac_bytes, temp_ether_addr, 6); - - return retval; -} - - -static int read_str(const char *line, void *arg) -{ - char **dest = arg; - - free(*dest); - *dest = strdup(line); - - return 1; -} - - -static int read_u32(const char *line, void *arg) -{ - uint32_t *dest = arg; - char *endptr; - *dest = strtoul(line, &endptr, 0); - return endptr[0] == '\0'; -} - - -static int read_yn(const char *line, void *arg) -{ - char *dest = arg; - int retval = 1; - - if (!strcasecmp("yes", line)) - *dest = 1; - else if (!strcasecmp("no", line)) - *dest = 0; - else retval = 0; - - return retval; -} - - -/* find option 'code' in opt_list */ -struct option_set *find_option(struct option_set *opt_list, char code) -{ - while (opt_list && opt_list->data[OPT_CODE] < code) - opt_list = opt_list->next; - - if (opt_list && opt_list->data[OPT_CODE] == code) return opt_list; - else return NULL; -} - - -/* add an option to the opt_list */ -static void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length) -{ - struct option_set *existing, *new, **curr; - - /* add it to an existing option */ - if ((existing = find_option(*opt_list, option->code))) { - DEBUG(LOG_INFO, "Attaching option %s to existing member of list", option->name); - if (option->flags & OPTION_LIST) { - if (existing->data[OPT_LEN] + length <= 255) { - existing->data = realloc(existing->data, - existing->data[OPT_LEN] + length + 2); - memcpy(existing->data + existing->data[OPT_LEN] + 2, buffer, length); - existing->data[OPT_LEN] += length; - } /* else, ignore the data, we could put this in a second option in the future */ - } /* else, ignore the new data */ - } else { - DEBUG(LOG_INFO, "Attaching option %s to list", option->name); - - /* make a new option */ - new = xmalloc(sizeof(struct option_set)); - new->data = xmalloc(length + 2); - new->data[OPT_CODE] = option->code; - new->data[OPT_LEN] = length; - memcpy(new->data + 2, buffer, length); - - curr = opt_list; - while (*curr && (*curr)->data[OPT_CODE] < option->code) - curr = &(*curr)->next; - - new->next = *curr; - *curr = new; - } -} - - -/* read a dhcp option and add it to opt_list */ -static int read_opt(const char *const_line, void *arg) -{ - struct option_set **opt_list = arg; - char *opt, *val, *endptr; - struct dhcp_option *option; - int retval = 0, length; - char buffer[8]; - char *line; - uint16_t *result_u16 = (uint16_t *) buffer; - uint32_t *result_u32 = (uint32_t *) buffer; - - /* Cheat, the only const line we'll actually get is "" */ - line = (char *) const_line; - if (!(opt = strtok(line, " \t="))) return 0; - - for (option = dhcp_options; option->code; option++) - if (!strcasecmp(option->name, opt)) - break; - - if (!option->code) return 0; - - do { - if (!(val = strtok(NULL, ", \t"))) break; - length = option_lengths[option->flags & TYPE_MASK]; - retval = 0; - opt = buffer; /* new meaning for variable opt */ - switch (option->flags & TYPE_MASK) { - case OPTION_IP: - retval = read_ip(val, buffer); - break; - case OPTION_IP_PAIR: - retval = read_ip(val, buffer); - if (!(val = strtok(NULL, ", \t/-"))) retval = 0; - if (retval) retval = read_ip(val, buffer + 4); - break; - case OPTION_STRING: - length = strlen(val); - if (length > 0) { - if (length > 254) length = 254; - opt = val; - retval = 1; - } - break; - case OPTION_BOOLEAN: - retval = read_yn(val, buffer); - break; - case OPTION_U8: - buffer[0] = strtoul(val, &endptr, 0); - retval = (endptr[0] == '\0'); - break; - case OPTION_U16: - *result_u16 = htons(strtoul(val, &endptr, 0)); - retval = (endptr[0] == '\0'); - break; - case OPTION_S16: - *result_u16 = htons(strtol(val, &endptr, 0)); - retval = (endptr[0] == '\0'); - break; - case OPTION_U32: - *result_u32 = htonl(strtoul(val, &endptr, 0)); - retval = (endptr[0] == '\0'); - break; - case OPTION_S32: - *result_u32 = htonl(strtol(val, &endptr, 0)); - retval = (endptr[0] == '\0'); - break; - default: - break; - } - if (retval) - attach_option(opt_list, option, opt, length); - } while (retval && option->flags & OPTION_LIST); - return retval; -} - -static int read_staticlease(const char *const_line, void *arg) -{ - - char *line; - char *mac_string; - char *ip_string; - uint8_t *mac_bytes; - uint32_t *ip; - - - /* Allocate memory for addresses */ - mac_bytes = xmalloc(sizeof(unsigned char) * 8); - ip = xmalloc(sizeof(uint32_t)); - - /* Read mac */ - line = (char *) const_line; - mac_string = strtok(line, " \t"); - read_mac(mac_string, mac_bytes); - - /* Read ip */ - ip_string = strtok(NULL, " \t"); - read_ip(ip_string, ip); - - addStaticLease(arg, mac_bytes, ip); - -#ifdef UDHCP_DEBUG - printStaticLeases(arg); -#endif - - return 1; - -} - - -static const struct config_keyword keywords[] = { - /* keyword handler variable address default */ - {"start", read_ip, &(server_config.start), "192.168.0.20"}, - {"end", read_ip, &(server_config.end), "192.168.0.254"}, - {"interface", read_str, &(server_config.interface), "eth0"}, - {"option", read_opt, &(server_config.options), ""}, - {"opt", read_opt, &(server_config.options), ""}, - {"max_leases", read_u32, &(server_config.max_leases), "254"}, - {"remaining", read_yn, &(server_config.remaining), "yes"}, - {"auto_time", read_u32, &(server_config.auto_time), "7200"}, - {"decline_time",read_u32, &(server_config.decline_time),"3600"}, - {"conflict_time",read_u32,&(server_config.conflict_time),"3600"}, - {"offer_time", read_u32, &(server_config.offer_time), "60"}, - {"min_lease", read_u32, &(server_config.min_lease), "60"}, - {"lease_file", read_str, &(server_config.lease_file), LEASES_FILE}, - {"pidfile", read_str, &(server_config.pidfile), "/var/run/udhcpd.pid"}, - {"notify_file", read_str, &(server_config.notify_file), ""}, - {"siaddr", read_ip, &(server_config.siaddr), "0.0.0.0"}, - {"sname", read_str, &(server_config.sname), ""}, - {"boot_file", read_str, &(server_config.boot_file), ""}, - {"static_lease",read_staticlease, &(server_config.static_leases), ""}, - /*ADDME: static lease */ - {"", NULL, NULL, ""} -}; - - -int read_config(const char *file) -{ - FILE *in; - char buffer[READ_CONFIG_BUF_SIZE], *token, *line; -#ifdef UDHCP_DEBUG - char orig[READ_CONFIG_BUF_SIZE]; -#endif - int i, lm = 0; - - for (i = 0; keywords[i].keyword[0]; i++) - if (keywords[i].def[0]) - keywords[i].handler(keywords[i].def, keywords[i].var); - - if (!(in = fopen(file, "r"))) { - LOG(LOG_ERR, "unable to open config file: %s", file); - return 0; - } - - while (fgets(buffer, READ_CONFIG_BUF_SIZE, in)) { - lm++; - if (strchr(buffer, '\n')) *(strchr(buffer, '\n')) = '\0'; -#ifdef UDHCP_DEBUG - strcpy(orig, buffer); -#endif - if (strchr(buffer, '#')) *(strchr(buffer, '#')) = '\0'; - - if (!(token = strtok(buffer, " \t"))) continue; - if (!(line = strtok(NULL, ""))) continue; - - /* eat leading whitespace */ - line = line + strspn(line, " \t="); - /* eat trailing whitespace */ - for (i = strlen(line); i > 0 && isspace(line[i - 1]); i--); - line[i] = '\0'; - - for (i = 0; keywords[i].keyword[0]; i++) - if (!strcasecmp(token, keywords[i].keyword)) - if (!keywords[i].handler(line, keywords[i].var)) { - LOG(LOG_ERR, "Failure parsing line %d of %s", lm, file); - DEBUG(LOG_ERR, "unable to parse '%s'", orig); - /* reset back to the default value */ - keywords[i].handler(keywords[i].def, keywords[i].var); - } - } - fclose(in); - return 1; -} - - -void write_leases(void) -{ - FILE *fp; - unsigned int i; - char buf[255]; - time_t curr = time(0); - unsigned long tmp_time; - - if (!(fp = fopen(server_config.lease_file, "w"))) { - LOG(LOG_ERR, "Unable to open %s for writing", server_config.lease_file); - return; - } - - for (i = 0; i < server_config.max_leases; i++) { - if (leases[i].yiaddr != 0) { - - /* screw with the time in the struct, for easier writing */ - tmp_time = leases[i].expires; - - if (server_config.remaining) { - if (lease_expired(&(leases[i]))) - leases[i].expires = 0; - else leases[i].expires -= curr; - } /* else stick with the time we got */ - leases[i].expires = htonl(leases[i].expires); - fwrite(&leases[i], sizeof(struct dhcpOfferedAddr), 1, fp); - - /* Then restore it when done. */ - leases[i].expires = tmp_time; - } - } - fclose(fp); - - if (server_config.notify_file) { - sprintf(buf, "%s %s", server_config.notify_file, server_config.lease_file); - system(buf); - } -} - - -void read_leases(const char *file) -{ - FILE *fp; - unsigned int i = 0; - struct dhcpOfferedAddr lease; - - if (!(fp = fopen(file, "r"))) { - LOG(LOG_ERR, "Unable to open %s for reading", file); - return; - } - - while (i < server_config.max_leases && (fread(&lease, sizeof lease, 1, fp) == 1)) { - /* ADDME: is it a static lease */ - if (lease.yiaddr >= server_config.start && lease.yiaddr <= server_config.end) { - lease.expires = ntohl(lease.expires); - if (!server_config.remaining) lease.expires -= time(0); - if (!(add_lease(lease.chaddr, lease.yiaddr, lease.expires))) { - LOG(LOG_WARNING, "Too many leases while loading %s\n", file); - break; - } - i++; - } - } - DEBUG(LOG_INFO, "Read %d leases", i); - fclose(fp); -} -- cgit v1.2.3