Add support for configuring TCP Authentication Option. Only a single key is supported with default options.
Reviewed-by: David Ahern dsahern@kernel.org Signed-off-by: Leonard Crestez cdleonard@gmail.com --- tools/testing/selftests/net/nettest.c | 75 ++++++++++++++++++++++++--- 1 file changed, 69 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c index 3841e5fec7c7..5fe7354c40cf 100644 --- a/tools/testing/selftests/net/nettest.c +++ b/tools/testing/selftests/net/nettest.c @@ -104,10 +104,12 @@ struct sock_args { } key_addr; unsigned int key_addr_prefix_len; /* 0: default, -1: force off, +1: force on */ int bind_key_ifindex;
+ const char *authopt_password; + /* expected addresses and device index for connection */ const char *expected_dev; const char *expected_server_dev; int expected_ifindex;
@@ -254,10 +256,54 @@ static int switch_ns(const char *ns) close(fd);
return ret; }
+static int tcp_set_authopt(int sd, struct sock_args *args) +{ + struct tcp_authopt_key key; + int rc; + + memset(&key, 0, sizeof(key)); + strcpy((char *)key.key, args->authopt_password); + key.keylen = strlen(args->authopt_password); + key.alg = TCP_AUTHOPT_ALG_HMAC_SHA_1_96; + + if (args->key_addr_prefix_str) { + key.flags |= TCP_AUTHOPT_KEY_ADDR_BIND; + switch (args->version) { + case AF_INET: + memcpy(&key.addr, &args->key_addr.v4, sizeof(args->key_addr.v4)); + break; + case AF_INET6: + memcpy(&key.addr, &args->key_addr.v6, sizeof(args->key_addr.v6)); + break; + default: + log_error("unknown address family\n"); + exit(1); + } + if (args->key_addr_prefix_len) { + key.flags |= TCP_AUTHOPT_KEY_PREFIXLEN; + key.prefixlen = args->key_addr_prefix_len; + } + } + + if ((args->ifindex && args->bind_key_ifindex >= 0) || args->bind_key_ifindex >= 1) { + key.flags |= TCP_AUTHOPT_KEY_IFINDEX; + key.ifindex = args->ifindex; + log_msg("TCP_AUTHOPT_KEY_IFINDEX set ifindex=%d\n", key.ifindex); + } else { + log_msg("TCP_AUTHOPT_KEY_IFINDEX off\n", key.ifindex); + } + + rc = setsockopt(sd, IPPROTO_TCP, TCP_AUTHOPT_KEY, &key, sizeof(key)); + if (rc < 0) + log_err_errno("setsockopt(TCP_AUTHOPT_KEY)"); + + return rc; +} + static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args) { int keylen = strlen(args->password); struct tcp_md5sig md5sig = {}; int opt = TCP_MD5SIG; @@ -1541,10 +1587,15 @@ static int do_server(struct sock_args *args, int ipc_fd) if (args->password && tcp_md5_remote(lsd, args)) { close(lsd); goto err_exit; }
+ if (args->authopt_password && tcp_set_authopt(lsd, args)) { + close(lsd); + goto err_exit; + } + ipc_write(ipc_fd, 1); while (1) { log_msg("waiting for client connection.\n"); FD_ZERO(&rfds); FD_SET(lsd, &rfds); @@ -1663,10 +1714,13 @@ static int connectsock(void *addr, socklen_t alen, struct sock_args *args) goto out;
if (args->password && tcp_md5sig(sd, addr, alen, args)) goto err;
+ if (args->authopt_password && tcp_set_authopt(sd, args)) + goto err; + if (args->bind_test_only) goto out;
if (connect(sd, addr, alen) < 0) { if (errno != EINPROGRESS) { @@ -1852,11 +1906,11 @@ static int ipc_parent(int cpid, int fd, struct sock_args *args)
wait(&status); return client_status; }
-#define GETOPT_STR "sr:l:c:p:t:g:P:DRn:M:X:m:d:I:BN:O:SCi6xL:0:1:2:3:Fbqf" +#define GETOPT_STR "sr:l:c:p:t:g:P:DRn:M:X:m:A:d:I:BN:O:SCi6xL:0:1:2:3:Fbqf" #define OPT_FORCE_BIND_KEY_IFINDEX 1001 #define OPT_NO_BIND_KEY_IFINDEX 1002
static struct option long_opts[] = { {"force-bind-key-ifindex", 0, 0, OPT_FORCE_BIND_KEY_IFINDEX}, @@ -1897,14 +1951,15 @@ static void print_usage(char *prog) " -L len send random message of given length\n" " -n num number of times to send message\n" "\n" " -M password use MD5 sum protection\n" " -X password MD5 password for client mode\n" - " -m prefix/len prefix and length to use for MD5 key\n" - " --no-bind-key-ifindex: Force TCP_MD5SIG_FLAG_IFINDEX off\n" - " --force-bind-key-ifindex: Force TCP_MD5SIG_FLAG_IFINDEX on\n" + " -m prefix/len prefix and length to use for MD5/AO key\n" + " --no-bind-key-ifindex: Force disable binding key to ifindex\n" + " --force-bind-key-ifindex: Force enable binding key to ifindex\n" " (default: only if -I is passed)\n" + " -A password use RFC5925 TCP Authentication Option with password\n" "\n" " -g grp multicast group (e.g., 239.1.1.1)\n" " -i interactive mode (default is echo and terminate)\n" "\n" " -0 addr Expected local address\n" @@ -2022,10 +2077,13 @@ int main(int argc, char *argv[]) args.client_pw = optarg; break; case 'm': args.key_addr_prefix_str = optarg; break; + case 'A': + args.authopt_password = optarg; + break; case 'S': args.use_setsockopt = 1; break; case 'f': args.use_freebind = 1; @@ -2085,12 +2143,17 @@ int main(int argc, char *argv[]) args.type != SOCK_STREAM)) { log_error("MD5 passwords apply to TCP only and require a remote ip for the password\n"); return 1; }
- if (args.key_addr_prefix_str && !args.password) { - log_error("Prefix range for MD5 protection specified without a password\n"); + if (args.key_addr_prefix_str && !args.password && !args.authopt_password) { + log_error("Prefix range for authentication requires -M or -A\n"); + return 1; + } + + if (args.key_addr_prefix_len && args.authopt_password) { + log_error("TCP-AO does not support prefix match, only full address\n"); return 1; }
if (iter == 0) { fprintf(stderr, "Invalid number of messages to send\n");