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Diffstat (limited to 'contrib/fwd/src/fwd.h')
| -rw-r--r-- | contrib/fwd/src/fwd.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/contrib/fwd/src/fwd.h b/contrib/fwd/src/fwd.h new file mode 100644 index 000000000..c93c0aff9 --- /dev/null +++ b/contrib/fwd/src/fwd.h @@ -0,0 +1,201 @@ +/* + * fwd - OpenWrt firewall daemon - data structures + * + * Copyright (C) 2009 Jo-Philipp Wich <xm@subsignal.org> + * + * The fwd program is free software: you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * The fwd program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with the fwd program. If not, see http://www.gnu.org/licenses/. + */ + +#ifndef __FWD_H__ +#define __FWD_H__ + +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include <stdarg.h> +#include <stdlib.h> +#include <netinet/in.h> + +#if 0 +#include "fwd_addr.h" +#include "fwd_rules.h" +#include "fwd_config.h" +#endif + +enum fwd_policy { + FWD_P_UNSPEC = 0, + FWD_P_DROP = 1, + FWD_P_REJECT = 2, + FWD_P_ACCEPT = 3 +}; + +enum fwd_stype { + FWD_S_DEFAULTS = 0, + FWD_S_ZONE = 1, + FWD_S_FORWARD = 2, + FWD_S_REDIRECT = 3, + FWD_S_RULE = 4, + FWD_S_INCLUDE = 5 +}; + +enum fwd_ptype { + FWD_PR_CUSTOM = 0, + FWD_PR_TCP = 1, + FWD_PR_UDP = 2, + FWD_PR_TCPUDP = 3, + FWD_PR_ICMP = 4, + FWD_PR_ALL = 5 +}; + +struct fwd_portrange { + unsigned short min; + unsigned short max; +}; + +struct fwd_cidr { + struct in_addr addr; + int prefix; +}; + +struct fwd_mac { + unsigned char mac[6]; +}; + +struct fwd_proto { + enum fwd_ptype type; + int proto; +}; + +struct fwd_icmptype { + char name[32]; + int type; + int code; +}; + +struct fwd_network_list { + char *name; + char *ifname; + int isalias; + struct fwd_cidr *addr; + struct fwd_network_list *next; +}; + +struct fwd_defaults { + enum fwd_policy input; + enum fwd_policy forward; + enum fwd_policy output; + int syn_flood; + int syn_rate; + int syn_burst; + int drop_invalid; +}; + +struct fwd_zone { + char *name; + struct fwd_network_list *networks; + enum fwd_policy input; + enum fwd_policy forward; + enum fwd_policy output; + int masq; + int mtu_fix; + int conntrack; +}; + +struct fwd_forwarding { + struct fwd_zone *src; + struct fwd_zone *dest; + int mtu_fix; /* legacy */ + int masq; /* new */ +}; + +struct fwd_redirect { + struct fwd_zone *src; + struct fwd_cidr *src_ip; + struct fwd_mac *src_mac; + struct fwd_portrange *src_port; + struct fwd_portrange *src_dport; + struct fwd_cidr *dest_ip; + struct fwd_portrange *dest_port; + struct fwd_proto *proto; +}; + +struct fwd_rule { + struct fwd_zone *src; + struct fwd_zone *dest; + struct fwd_cidr *src_ip; + struct fwd_mac *src_mac; + struct fwd_portrange *src_port; + struct fwd_cidr *dest_ip; + struct fwd_portrange *dest_port; + struct fwd_proto *proto; + struct fwd_icmptype *icmp_type; + enum fwd_policy target; +}; + +struct fwd_include { + char *path; +}; + +struct fwd_data { + enum fwd_stype type; + struct fwd_data *next; + union { + struct fwd_defaults defaults; + struct fwd_zone zone; + struct fwd_forwarding forwarding; + struct fwd_redirect redirect; + struct fwd_rule rule; + struct fwd_include include; + } section; +}; + + +struct fwd_handle { + int rtnl_socket; + struct fwd_data *conf; + struct fwd_addr_list *addrs; +}; + + +/* fwd_zmalloc(size_t) + * Allocates a zeroed buffer of the given size. */ +static void * fwd_zmalloc(size_t s) +{ + void *b = malloc(s); + + if( b != NULL ) + memset(b, 0, s); + + return b; +} + +/* fwd_fatal(fmt, ...) + * Prints message to stderr and termintes program. */ +#define fwd_fatal(...) do { \ + fprintf(stderr, "ERROR: "); \ + fprintf(stderr, __VA_ARGS__); \ + fprintf(stderr, "\n"); \ + exit(1); \ +} while(0) + +/* fwd_alloc_ptr(type) + * Allocates a buffer with the size of the given datatype + * and returns a pointer to it. */ +#define fwd_alloc_ptr(t) (t *) fwd_zmalloc(sizeof(t)) + +/* fwd_free_ptr(void *) + * Frees the given pointer and sets it to NULL. + * Safe for NULL values. */ +#define fwd_free_ptr(x) do { if(x != NULL) free(x); x = NULL; } while(0) + +#endif |