From: Ralf Lici <[email protected]> Add a selftest to verify that when a socket is bound to a local address, UDP traffic from ovpn is correctly routed through that address.
This test extends test-bind.sh by binding to the addresses on each veth pair and uses tcpdump to confirm that traffic flows as expected. Cc: Shuah Khan <[email protected]> Signed-off-by: Ralf Lici <[email protected]> Signed-off-by: Antonio Quartulli <[email protected]> --- tools/testing/selftests/net/ovpn/Makefile | 1 + tools/testing/selftests/net/ovpn/common.sh | 6 +- tools/testing/selftests/net/ovpn/ovpn-cli.c | 202 +++++++++--------- .../selftests/net/ovpn/test-bind-addr.sh | 10 + tools/testing/selftests/net/ovpn/test-bind.sh | 52 +++-- tools/testing/selftests/net/ovpn/test-mark.sh | 2 +- 6 files changed, 152 insertions(+), 121 deletions(-) create mode 100755 tools/testing/selftests/net/ovpn/test-bind-addr.sh diff --git a/tools/testing/selftests/net/ovpn/Makefile b/tools/testing/selftests/net/ovpn/Makefile index f219d87e2c44..7a5ad7a19273 100644 --- a/tools/testing/selftests/net/ovpn/Makefile +++ b/tools/testing/selftests/net/ovpn/Makefile @@ -26,6 +26,7 @@ LDLIBS += $(NL_LDLIBS) TEST_FILES = common.sh TEST_PROGS := \ + test-bind-addr.sh \ test-bind.sh \ test-chachapoly.sh \ test-close-socket-tcp.sh \ diff --git a/tools/testing/selftests/net/ovpn/common.sh b/tools/testing/selftests/net/ovpn/common.sh index c802e4e50054..5de42948d189 100644 --- a/tools/testing/selftests/net/ovpn/common.sh +++ b/tools/testing/selftests/net/ovpn/common.sh @@ -67,10 +67,12 @@ setup_listener() { add_peer() { dev=${2:-"any"} + laddr=${3:-"any"} if [ "${PROTO}" == "UDP" ]; then if [ ${1} -eq 0 ]; then - ip netns exec peer0 ${OVPN_CLI} new_multi_peer tun0 ${dev} 1 ${UDP_PEERS_FILE} + ip netns exec peer0 ${OVPN_CLI} new_multi_peer tun0 ${dev} ${laddr} \ + 1 ${UDP_PEERS_FILE} for p in $(seq 1 ${NUM_PEERS}); do ip netns exec peer0 ${OVPN_CLI} new_key tun0 ${p} 1 0 ${ALG} 0 \ @@ -82,7 +84,7 @@ add_peer() { RPORT=$(awk "NR == ${1} {print \$4}" ${UDP_PEERS_FILE}) LPORT=$(awk "NR == ${1} {print \$6}" ${UDP_PEERS_FILE}) ip netns exec peer${1} ${OVPN_CLI} new_peer tun${1} ${dev} ${TX_ID} ${1} \ - ${LPORT} ${RADDR} ${RPORT} + ${laddr} ${LPORT} ${RADDR} ${RPORT} ip netns exec peer${1} ${OVPN_CLI} new_key tun${1} ${TX_ID} 1 0 \ ${ALG} 1 data64.key fi diff --git a/tools/testing/selftests/net/ovpn/ovpn-cli.c b/tools/testing/selftests/net/ovpn/ovpn-cli.c index 6d84380c76ad..7f7780a515d1 100644 --- a/tools/testing/selftests/net/ovpn/ovpn-cli.c +++ b/tools/testing/selftests/net/ovpn/ovpn-cli.c @@ -105,7 +105,7 @@ struct ovpn_ctx { sa_family_t sa_family; unsigned long peer_id, tx_id; - unsigned long lport; + const char *laddr, *lport; union { struct sockaddr_in in4; @@ -470,59 +470,29 @@ static int ovpn_parse_key_direction(const char *dir, struct ovpn_ctx *ctx) return 0; } -static int ovpn_socket(struct ovpn_ctx *ctx, sa_family_t family, int proto) +static int ovpn_socket(struct ovpn_ctx *ctx, sa_family_t family, int type) { - struct sockaddr_storage local_sock = { 0 }; - struct sockaddr_in6 *in6; - struct sockaddr_in *in; - int ret, s, sock_type; - size_t sock_len; - - if (proto == IPPROTO_UDP) - sock_type = SOCK_DGRAM; - else if (proto == IPPROTO_TCP) - sock_type = SOCK_STREAM; - else - return -EINVAL; + int ret, s; - s = socket(family, sock_type, 0); + s = socket(family, type, 0); if (s < 0) { perror("cannot create socket"); return -1; } - switch (family) { - case AF_INET: - in = (struct sockaddr_in *)&local_sock; - in->sin_family = family; - in->sin_port = htons(ctx->lport); - in->sin_addr.s_addr = htonl(INADDR_ANY); - sock_len = sizeof(*in); - break; - case AF_INET6: - in6 = (struct sockaddr_in6 *)&local_sock; - in6->sin6_family = family; - in6->sin6_port = htons(ctx->lport); - in6->sin6_addr = in6addr_any; - sock_len = sizeof(*in6); - break; - default: - return -1; - } - int opt = 1; ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)); if (ret < 0) { perror("setsockopt for SO_REUSEADDR"); - return ret; + goto close; } ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)); if (ret < 0) { perror("setsockopt for SO_REUSEPORT"); - return ret; + goto close; } if (ctx->mark != 0) { @@ -530,16 +500,17 @@ static int ovpn_socket(struct ovpn_ctx *ctx, sa_family_t family, int proto) sizeof(ctx->mark)); if (ret < 0) { perror("setsockopt for SO_MARK"); - return ret; + goto close; } } if (family == AF_INET6) { opt = 0; - if (setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &opt, - sizeof(opt))) { + ret = setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &opt, + sizeof(opt)); + if (ret < 0) { perror("failed to set IPV6_V6ONLY"); - return -1; + goto close; } } @@ -547,45 +518,83 @@ static int ovpn_socket(struct ovpn_ctx *ctx, sa_family_t family, int proto) if (setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE, ctx->bind_dev, strlen(ctx->bind_dev) + 1) != 0) { perror("setsockopt for SO_BINDTODEVICE"); - return -1; + goto close; } } - ret = bind(s, (struct sockaddr *)&local_sock, sock_len); - if (ret < 0) { - perror("cannot bind socket"); - goto err_socket; + return s; +close: + close(s); + return ret; +} + +static int ovpn_setup_socket(struct ovpn_ctx *ctx, sa_family_t family, + int socktype) +{ + struct addrinfo *list_ai, *curr_ai; + struct addrinfo hints; + int ret, socket; + + memset(&hints, 0, sizeof(hints)); + hints.ai_flags = AI_NUMERICHOST | AI_NUMERICSERV | + (socktype == SOCK_STREAM ? 0: AI_V4MAPPED) | + (ctx->laddr ? 0 : AI_PASSIVE); + hints.ai_family = family; + hints.ai_socktype = socktype; + ret = getaddrinfo(ctx->laddr, ctx->lport, &hints, &list_ai); + if (ret) { + fprintf(stderr, "laddr %s, lport %s, getaddrinfo on local address: %s\n", ctx->laddr, ctx->lport, gai_strerror(ret)); + return ret; } - ctx->socket = s; - ctx->sa_family = family; - return 0; + for (curr_ai = list_ai; curr_ai != NULL; curr_ai = curr_ai->ai_next) { + socket = ovpn_socket(ctx, family, socktype); + if (socket < 0) + continue; -err_socket: - close(s); - return -1; + ret = bind(socket, curr_ai->ai_addr, curr_ai->ai_addrlen); + if (ret == 0) + break; + + close(socket); + } + + freeaddrinfo(list_ai); + + if (ret < 0) { + perror("cannot setup socket\n"); + return ret; + } + + return socket; } static int ovpn_udp_socket(struct ovpn_ctx *ctx, sa_family_t family) { - return ovpn_socket(ctx, family, IPPROTO_UDP); + int socket = ovpn_setup_socket(ctx, family, SOCK_DGRAM); + if (socket < 0) + return socket; + + ctx->sa_family = family; + ctx->socket = socket; + return 0; } static int ovpn_listen(struct ovpn_ctx *ctx, sa_family_t family) { - int ret; + int ret, socket = ovpn_setup_socket(ctx, family, SOCK_STREAM); + if (socket < 0) + return socket; - ret = ovpn_socket(ctx, family, IPPROTO_TCP); - if (ret < 0) - return ret; - - ret = listen(ctx->socket, 10); + ret = listen(socket, 10); if (ret < 0) { perror("listen"); - close(ctx->socket); + close(socket); return -1; } + ctx->sa_family = family; + ctx->socket = socket; return 0; } @@ -620,18 +629,13 @@ static int ovpn_accept(struct ovpn_ctx *ctx) return ret; } -static int ovpn_connect(struct ovpn_ctx *ovpn) +static int ovpn_connect(struct ovpn_ctx *ctx) { + const sa_family_t family = ctx->remote.in4.sin_family; socklen_t socklen; - int s, ret; + int ret, socket; - s = socket(ovpn->remote.in4.sin_family, SOCK_STREAM, 0); - if (s < 0) { - perror("cannot create socket"); - return -1; - } - - switch (ovpn->remote.in4.sin_family) { + switch (family) { case AF_INET: socklen = sizeof(struct sockaddr_in); break; @@ -642,20 +646,22 @@ static int ovpn_connect(struct ovpn_ctx *ovpn) return -EOPNOTSUPP; } - ret = connect(s, (struct sockaddr *)&ovpn->remote, socklen); + socket = ovpn_setup_socket(ctx, family, SOCK_STREAM); + if (socket < 0) + return socket; + + ret = connect(socket, (struct sockaddr *)&ctx->remote, socklen); if (ret < 0) { perror("connect"); - goto err; + close(socket); + return ret; } fprintf(stderr, "connected\n"); - ovpn->socket = s; - + ctx->sa_family = family; + ctx->socket = socket; return 0; -err: - close(s); - return ret; } static int ovpn_new_peer(struct ovpn_ctx *ovpn, bool is_tcp) @@ -1702,7 +1708,7 @@ static void usage(const char *cmd) "\tkey_file: file containing the symmetric key for encryption\n"); fprintf(stderr, - "* new_peer <iface> <dev> <peer_id> <tx_id> <lport> <raddr> <rport> [vpnaddr]: add new peer\n"); + "* new_peer <iface> <dev> <peer_id> <tx_id> <laddr> <lport> <raddr> <rport> [vpnaddr]: add new peer\n"); fprintf(stderr, "\tiface: ovpn interface name\n"); fprintf(stderr, "\tdev: transport interface name to bind to, supports 'any'\n"); @@ -1711,15 +1717,19 @@ static void usage(const char *cmd) "\tpeer_id: peer ID found in data packets received from this peer\n"); fprintf(stderr, "\ttx_id: peer ID to be used when sending to this peer\n"); + fprintf(stderr, + "\tladdr: local UDP address to bind to, supports 'any'\n"); fprintf(stderr, "\traddr: peer IP address\n"); fprintf(stderr, "\trport: peer UDP port\n"); fprintf(stderr, "\tvpnaddr: peer VPN IP\n"); fprintf(stderr, - "* new_multi_peer <iface> <dev> <lport> <peers_file> [mark]: add multiple peers as listed in the file\n"); + "* new_multi_peer <iface> <dev> <laddr> <lport> <peers_file> [mark]: add multiple peers as listed in the file\n"); fprintf(stderr, "\tiface: ovpn interface name\n"); fprintf(stderr, "\tdev: transport interface name to bind to, supports 'any'\n"); + fprintf(stderr, + "\tladdr: local UDP address to bind to, supports 'any'\n"); fprintf(stderr, "\tlport: local UDP port to bind to\n"); fprintf(stderr, "\tpeers_file: text file containing one peer per line. Line format:\n"); @@ -2203,11 +2213,8 @@ static int ovpn_parse_cmd_args(struct ovpn_ctx *ovpn, int argc, char *argv[]) if (argc < 5) return -EINVAL; - ovpn->lport = strtoul(argv[3], NULL, 10); - if (errno == ERANGE || ovpn->lport > 65535) { - fprintf(stderr, "lport value out of range\n"); - return -1; - } + ovpn->laddr = NULL; + ovpn->lport = argv[3]; ovpn->peers_file = argv[4]; @@ -2221,6 +2228,9 @@ static int ovpn_parse_cmd_args(struct ovpn_ctx *ovpn, int argc, char *argv[]) ovpn->sa_family = AF_INET; + ovpn->laddr = NULL; + ovpn->lport = "1"; + ret = ovpn_parse_new_peer(ovpn, argv[3], argv[4], argv[5], argv[6], NULL); if (ret < 0) { @@ -2240,41 +2250,35 @@ static int ovpn_parse_cmd_args(struct ovpn_ctx *ovpn, int argc, char *argv[]) } break; case CMD_NEW_PEER: - if (argc < 8) + if (argc < 9) return -EINVAL; ovpn->bind_dev = strcmp(argv[3], "any") == 0 ? NULL : argv[3]; - ovpn->lport = strtoul(argv[6], NULL, 10); - if (errno == ERANGE || ovpn->lport > 65535) { - fprintf(stderr, "lport value out of range\n"); - return -1; - } + ovpn->laddr = strcmp(argv[6], "any") == 0 ? NULL : argv[6]; + ovpn->lport = argv[7]; - const char *vpnip = (argc > 9) ? argv[9] : NULL; + const char *vpnip = (argc > 10) ? argv[10] : NULL; - ret = ovpn_parse_new_peer(ovpn, argv[4], argv[5], argv[7], argv[8], + ret = ovpn_parse_new_peer(ovpn, argv[4], argv[5], argv[8], argv[9], vpnip); if (ret < 0) return -1; break; case CMD_NEW_MULTI_PEER: - if (argc < 6) + if (argc < 7) return -EINVAL; ovpn->bind_dev = strcmp(argv[3], "any") == 0 ? NULL : argv[3]; - ovpn->lport = strtoul(argv[4], NULL, 10); - if (errno == ERANGE || ovpn->lport > 65535) { - fprintf(stderr, "lport value out of range\n"); - return -1; - } + ovpn->laddr = strcmp(argv[4], "any") == 0 ? NULL : argv[4]; + ovpn->lport = argv[5]; - ovpn->peers_file = argv[5]; + ovpn->peers_file = argv[6]; ovpn->mark = 0; - if (argc > 6) { - ovpn->mark = strtoul(argv[6], NULL, 10); + if (argc > 7) { + ovpn->mark = strtoul(argv[7], NULL, 10); if (errno == ERANGE || ovpn->mark > UINT32_MAX) { fprintf(stderr, "mark value out of range\n"); return -1; diff --git a/tools/testing/selftests/net/ovpn/test-bind-addr.sh b/tools/testing/selftests/net/ovpn/test-bind-addr.sh new file mode 100755 index 000000000000..e33a433ceb4b --- /dev/null +++ b/tools/testing/selftests/net/ovpn/test-bind-addr.sh @@ -0,0 +1,10 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2020-2025 OpenVPN, Inc. +# +# Author: Ralf Lici <[email protected]> +# Antonio Quartulli <[email protected]> + +BIND_TYPE="ADDR" + +source test-bind.sh diff --git a/tools/testing/selftests/net/ovpn/test-bind.sh b/tools/testing/selftests/net/ovpn/test-bind.sh index fd7c3c8fdf63..b642f396c2a4 100755 --- a/tools/testing/selftests/net/ovpn/test-bind.sh +++ b/tools/testing/selftests/net/ovpn/test-bind.sh @@ -11,6 +11,8 @@ set -e PROTO=UDP source ./common.sh +BIND_TYPE=${BIND_TYPE:-"DEV"} + cleanup modprobe -q ovpn || true @@ -61,17 +63,19 @@ run_bind_test() { # close any active socket killall $(basename ${OVPN_CLI}) 2>/dev/null || true - ip netns exec peer1 ${OVPN_CLI} new_peer tun1 ${dev1} 1 10 1 ${raddr4_peer1} 1 + ip netns exec peer1 ${OVPN_CLI} new_peer tun1 ${dev1} 1 10 ${raddr4_peer2} 1 ${raddr4_peer1} 1 ip netns exec peer1 ${OVPN_CLI} new_key tun1 1 1 0 ${ALG} 0 data64.key - ip netns exec peer2 ${OVPN_CLI} new_peer tun2 ${dev2} 10 1 1 ${raddr4_peer2} 1 + ip netns exec peer2 ${OVPN_CLI} new_peer tun2 ${dev2} 10 1 ${raddr4_peer1} 1 ${raddr4_peer2} 1 ip netns exec peer2 ${OVPN_CLI} new_key tun2 10 1 0 ${ALG} 1 data64.key ip netns exec peer1 ${OVPN_CLI} set_peer tun1 1 60 120 ip netns exec peer2 ${OVPN_CLI} set_peer tun2 10 60 120 - timeout 2 ip netns exec peer1 tcpdump -i veth1 "${PROTO,,}" port 1 -n -q > /tmp/ovpn-bind1.log & + timeout 2 ip netns exec peer1 tcpdump -i veth1 "${PROTO,,}" and host ${raddr4_peer2} \ + and port 1 -n -q > /tmp/ovpn-bind1.log & tcpdump1_pid=$! - timeout 2 ip netns exec peer1 tcpdump -i veth2 "${PROTO,,}" port 1 -n -q > /tmp/ovpn-bind2.log & + timeout 2 ip netns exec peer1 tcpdump -i veth2 "${PROTO,,}" and host ${raddr4_peer2} \ + and port 1 -n -q > /tmp/ovpn-bind2.log & tcpdump2_pid=$! sleep 0.5 @@ -81,21 +85,31 @@ run_bind_test() { wait ${tcpdump2_pid} || true } -run_bind_test veth1 any 10.10.10.2 10.10.10.1 -[ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -ge 100 ] -[ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -eq 0 ] - -run_bind_test veth2 any 20.20.20.2 20.20.20.1 -[ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -ge 100 ] -[ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -eq 0 ] - -run_bind_test any veth1 10.10.10.2 10.10.10.1 -[ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -ge 100 ] -[ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -eq 0 ] - -run_bind_test any veth2 20.20.20.2 20.20.20.1 -[ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -ge 100 ] -[ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -eq 0 ] +if [ "${BIND_TYPE}" == "DEV" ]; then + run_bind_test veth1 any 10.10.10.2 10.10.10.1 + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -eq 0 ] + + run_bind_test veth2 any 20.20.20.2 20.20.20.1 + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -eq 0 ] + + run_bind_test any veth1 10.10.10.2 10.10.10.1 + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -eq 0 ] + + run_bind_test any veth2 20.20.20.2 20.20.20.1 + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -eq 0 ] +else + run_bind_test any any 10.10.10.2 10.10.10.1 + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -eq 0 ] + + run_bind_test any any 20.20.20.2 20.20.20.1 + [ "$(grep -c -i udp /tmp/ovpn-bind2.log)" -ge 100 ] + [ "$(grep -c -i udp /tmp/ovpn-bind1.log)" -eq 0 ] +fi cleanup diff --git a/tools/testing/selftests/net/ovpn/test-mark.sh b/tools/testing/selftests/net/ovpn/test-mark.sh index c2600bb22e2c..6f575f7b0635 100755 --- a/tools/testing/selftests/net/ovpn/test-mark.sh +++ b/tools/testing/selftests/net/ovpn/test-mark.sh @@ -26,7 +26,7 @@ for p in $(seq 0 3); do done # add peer0 with mark -ip netns exec peer0 ${OVPN_CLI} new_multi_peer tun0 any 1 ${UDP_PEERS_FILE} ${MARK} +ip netns exec peer0 ${OVPN_CLI} new_multi_peer tun0 any any 1 ${UDP_PEERS_FILE} ${MARK} for p in $(seq 1 3); do ip netns exec peer0 ${OVPN_CLI} new_key tun0 ${p} 1 0 ${ALG} 0 data64.key done -- 2.51.2
