diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/Makefile.am | 14 | ||||
| -rw-r--r-- | examples/nft-ct-helper-add.c | 149 | ||||
| -rw-r--r-- | examples/nft-ct-helper-del.c | 124 | ||||
| -rw-r--r-- | examples/nft-ct-helper-get.c | 150 |
4 files changed, 436 insertions, 1 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am index c0d84eb..96112e7 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -30,7 +30,10 @@ check_PROGRAMS = nft-table-add \ nft-flowtable-get \ nft-ruleset-get \ nft-ruleset-parse-file \ - nft-compat-get + nft-compat-get \ + nft-ct-helper-add \ + nft-ct-helper-get \ + nft-ct-helper-del nft_table_add_SOURCES = nft-table-add.c nft_table_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} @@ -124,3 +127,12 @@ nft_ruleset_parse_file_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} nft_compat_get_SOURCES = nft-compat-get.c nft_compat_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + +nft_ct_helper_add_SOURCES = nft-ct-helper-add.c +nft_ct_helper_add_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + +nft_ct_helper_get_SOURCES = nft-ct-helper-get.c +nft_ct_helper_get_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} + +nft_ct_helper_del_SOURCES = nft-ct-helper-del.c +nft_ct_helper_del_LDADD = ../src/libnftnl.la ${LIBMNL_LIBS} diff --git a/examples/nft-ct-helper-add.c b/examples/nft-ct-helper-add.c new file mode 100644 index 0000000..397443b --- /dev/null +++ b/examples/nft-ct-helper-add.c @@ -0,0 +1,149 @@ +/* + * (C) 2012-2016 by Pablo Neira Ayuso <pablo@netfilter.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <netinet/in.h> + +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> + +#include <libmnl/libmnl.h> +#include <libnftnl/object.h> + +static uint16_t parse_family(char *str, const char *option) +{ + if (strcmp(str, "ip") == 0) + return NFPROTO_IPV4; + else if (strcmp(str, "ip6") == 0) + return NFPROTO_IPV6; + else if (strcmp(str, "inet") == 0) + return NFPROTO_INET; + else { + fprintf(stderr, "Unknown %s: ip, ip6, inet\n", option); + exit(EXIT_FAILURE); + } +} + +static uint8_t parse_l4proto(char *str) +{ + if (strcmp(str, "udp") == 0) + return IPPROTO_UDP; + else if (strcmp(str, "tcp") == 0) + return IPPROTO_TCP; + else { + fprintf(stderr, "Unknown l4proto: tcp, udp\n"); + exit(EXIT_FAILURE); + } + return IPPROTO_TCP; +} + +static struct nftnl_obj *ct_helper_add_parse(int argc, char *argv[]) +{ + struct nftnl_obj *t; + uint16_t family, l3proto; + uint8_t l4proto; + + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + return NULL; + } + + family = parse_family(argv[1], "family"); + nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family); + nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER); + nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]); + + nftnl_obj_set_str(t, NFTNL_OBJ_CT_HELPER_NAME, argv[4]); + l4proto = parse_l4proto(argv[5]); + nftnl_obj_set_u8(t, NFTNL_OBJ_CT_HELPER_L4PROTO, l4proto); + if (argc == 7) { + l3proto = parse_family(argv[6], "l3proto"); + nftnl_obj_set_u16(t, NFTNL_OBJ_CT_HELPER_L3PROTO, l3proto); + } + + return t; +} + +int main(int argc, char *argv[]) +{ + struct nftnl_obj *t; + uint32_t seq, obj_seq, family, portid; + struct mnl_nlmsg_batch *batch; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + struct mnl_socket *nl; + int ret; + + if (argc < 6) { + fprintf(stderr, "%s <family> <table> <name> <type> <l4proto> [l3proto]\n", argv[0]); + exit(EXIT_FAILURE); + } + + t = ct_helper_add_parse(argc, argv); + if (t == NULL) + exit(EXIT_FAILURE); + + seq = time(NULL); + batch = mnl_nlmsg_batch_start(buf, sizeof(buf)); + + nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + obj_seq = seq; + family = nftnl_obj_get_u32(t, NFTNL_OBJ_FAMILY); + nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch), + NFT_MSG_NEWOBJ, family, NLM_F_CREATE | NLM_F_ACK, seq++); + + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_free(t); + mnl_nlmsg_batch_next(batch); + + nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + nl = mnl_socket_open(NETLINK_NETFILTER); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + portid = mnl_socket_get_portid(nl); + + if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch), + mnl_nlmsg_batch_size(batch)) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + mnl_nlmsg_batch_stop(batch); + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, obj_seq, portid, NULL, NULL); + if (ret <= 0) { + break; + } + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + } + if (ret == -1) { + perror("error"); + exit(EXIT_FAILURE); + } + mnl_socket_close(nl); + + return EXIT_SUCCESS; +} diff --git a/examples/nft-ct-helper-del.c b/examples/nft-ct-helper-del.c new file mode 100644 index 0000000..fda3026 --- /dev/null +++ b/examples/nft-ct-helper-del.c @@ -0,0 +1,124 @@ +/* + * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This software has been sponsored by Sophos Astaro <http://www.sophos.com> + */ + +#include <stdlib.h> +#include <time.h> +#include <string.h> +#include <netinet/in.h> + +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> + +#include <libmnl/libmnl.h> +#include <libnftnl/object.h> + +static struct nftnl_obj *ct_helper_del_parse(int argc, char *argv[]) +{ + struct nftnl_obj *t; + uint16_t family; + + if (strcmp(argv[1], "ip") == 0) + family = NFPROTO_IPV4; + else if (strcmp(argv[1], "ip6") == 0) + family = NFPROTO_IPV6; + else if (strcmp(argv[1], "inet") == 0) + family = NFPROTO_INET; + else { + fprintf(stderr, "Unknown family: ip, ip6, inet\n"); + return NULL; + } + + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + return NULL; + } + + nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]); + nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER); + nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family); + + return t; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, obj_seq, family; + struct nftnl_obj *t; + struct mnl_nlmsg_batch *batch; + int ret; + + if (argc != 4) { + fprintf(stderr, "%s <family> <table> <name>\n", argv[0]); + exit(EXIT_FAILURE); + } + + t = ct_helper_del_parse(argc, argv); + if (t == NULL) + exit(EXIT_FAILURE); + + seq = time(NULL); + batch = mnl_nlmsg_batch_start(buf, sizeof(buf)); + + nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + obj_seq = seq; + family = nftnl_obj_get_u32(t, NFTNL_OBJ_FAMILY); + nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch), + NFT_MSG_DELOBJ, family, NLM_F_ACK, + seq++); + nftnl_obj_nlmsg_build_payload(nlh, t); + mnl_nlmsg_batch_next(batch); + nftnl_obj_free(t); + + nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++); + mnl_nlmsg_batch_next(batch); + + nl = mnl_socket_open(NETLINK_NETFILTER); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + portid = mnl_socket_get_portid(nl); + + if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch), + mnl_nlmsg_batch_size(batch)) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + mnl_nlmsg_batch_stop(batch); + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, obj_seq, portid, NULL, NULL); + if (ret <= 0) + break; + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + } + if (ret == -1) { + perror("error"); + exit(EXIT_FAILURE); + } + mnl_socket_close(nl); + + return EXIT_SUCCESS; +} diff --git a/examples/nft-ct-helper-get.c b/examples/nft-ct-helper-get.c new file mode 100644 index 0000000..94bd0cd --- /dev/null +++ b/examples/nft-ct-helper-get.c @@ -0,0 +1,150 @@ +/* + * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This software has been sponsored by Sophos Astaro <http://www.sophos.com> + */ + + +#include <stdlib.h> +#include <time.h> +#include <string.h> +#include <netinet/in.h> + +#include <linux/netfilter.h> +#include <linux/netfilter/nf_tables.h> + +#include <libmnl/libmnl.h> +#include <libnftnl/object.h> + +static int obj_cb(const struct nlmsghdr *nlh, void *data) +{ + struct nftnl_obj *t; + char buf[4096]; + uint32_t *type = data; + + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + goto err; + } + + if (nftnl_obj_nlmsg_parse(nlh, t) < 0) { + perror("nftnl_obj_nlmsg_parse"); + goto err_free; + } + + nftnl_obj_snprintf(buf, sizeof(buf), t, *type, 0); + printf("%s\n", buf); + +err_free: + nftnl_obj_free(t); +err: + return MNL_CB_OK; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, family; + struct nftnl_obj *t = NULL; + int ret; + uint32_t type = NFTNL_OUTPUT_DEFAULT; + + if (argc < 3 || argc > 5) { + fprintf(stderr, "%s <family> <table> [<obj>] [<default|xml|json>]\n", + argv[0]); + return EXIT_FAILURE; + } + + if (strcmp(argv[1], "ip") == 0) + family = NFPROTO_IPV4; + else if (strcmp(argv[1], "ip6") == 0) + family = NFPROTO_IPV6; + else if (strcmp(argv[1], "inet") == 0) + family = NFPROTO_INET; + else if (strcmp(argv[1], "unspec") == 0) + family = NFPROTO_UNSPEC; + else { + fprintf(stderr, "Unknown family: ip, ip6, inet, unspec"); + exit(EXIT_FAILURE); + } + + if (strcmp(argv[argc-1], "xml") == 0) { + type = NFTNL_OUTPUT_XML; + argv[argc-1] = NULL; + argc--; + }else if (strcmp(argv[argc-1], "json") == 0) { + type = NFTNL_OUTPUT_JSON; + argv[argc-1] = NULL; + argc--; + } else if (strcmp(argv[argc - 1], "default") == 0) { + argc--; + } + + if (argc == 3 || argc == 4) { + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + exit(EXIT_FAILURE); + } + } + + seq = time(NULL); + nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER); + if (argc < 4) { + nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family, + NLM_F_DUMP, seq); + if (argc == 3) { + nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_free(t); + } + } else { + nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_set(t, NFTNL_OBJ_NAME, argv[3]); + + nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family, + NLM_F_ACK, seq); + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_free(t); + } + + nl = mnl_socket_open(NETLINK_NETFILTER); + if (nl == NULL) { + perror("mnl_socket_open"); + exit(EXIT_FAILURE); + } + + if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) { + perror("mnl_socket_bind"); + exit(EXIT_FAILURE); + } + portid = mnl_socket_get_portid(nl); + + if (mnl_socket_sendto(nl, nlh, nlh->nlmsg_len) < 0) { + perror("mnl_socket_send"); + exit(EXIT_FAILURE); + } + + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + while (ret > 0) { + ret = mnl_cb_run(buf, ret, seq, portid, obj_cb, &type); + if (ret <= 0) + break; + ret = mnl_socket_recvfrom(nl, buf, sizeof(buf)); + } + if (ret == -1) { + perror("error"); + exit(EXIT_FAILURE); + } + mnl_socket_close(nl); + + return EXIT_SUCCESS; +} |