From 3940de36728b768574a3e998389bb90d55f690d1 Mon Sep 17 00:00:00 2001 From: Dave Barach Date: Tue, 23 Jul 2019 16:28:36 -0400 Subject: api: binary api cleanup Multiple API message handlers call vnet_get_sup_hw_interface(...) without checking the inbound sw_if_index. This can cause a pool_elt_at_index ASSERT in a debug image, and major disorder in a production image. Given that a number of places are coded as follows, add an "api_visible_or_null" variant of vnet_get_sup_hw_interface, which returns NULL given an invalid sw_if_index, or a hidden sw interface: - hw = vnet_get_sup_hw_interface (vnm, sw_if_index); + hw = vnet_get_sup_hw_interface_api_visible_or_null (vnm, sw_if_index); if (hw == NULL || memif_device_class.index != hw->dev_class_index) return clib_error_return (0, "not a memif interface"); Rename two existing xxx_safe functions -> xxx_or_null to make it obvious what they return. Type: fix Change-Id: I29996e8d0768fd9e0c5495bd91ff8bedcf2c5697 Signed-off-by: Dave Barach --- src/vnet/bfd/bfd_udp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'src/vnet/bfd/bfd_udp.c') diff --git a/src/vnet/bfd/bfd_udp.c b/src/vnet/bfd/bfd_udp.c index 5c0da0ad35e..cc3b40c4075 100644 --- a/src/vnet/bfd/bfd_udp.c +++ b/src/vnet/bfd/bfd_udp.c @@ -82,7 +82,7 @@ vnet_api_error_t bfd_udp_set_echo_source (u32 sw_if_index) { vnet_sw_interface_t *sw_if = - vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index); + vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, sw_if_index); if (sw_if) { bfd_udp_main.echo_source_sw_if_index = sw_if_index; @@ -114,8 +114,8 @@ bfd_udp_is_echo_available (bfd_transport_e transport) * pick an unused address from that subnet */ vnet_sw_interface_t *sw_if = - vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, - bfd_udp_main.echo_source_sw_if_index); + vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, + bfd_udp_main.echo_source_sw_if_index); if (sw_if && sw_if->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) { if (BFD_TRANSPORT_UDP4 == transport) @@ -566,7 +566,7 @@ bfd_udp_validate_api_input (u32 sw_if_index, { bfd_udp_main_t *bum = &bfd_udp_main; vnet_sw_interface_t *sw_if = - vnet_get_sw_interface_safe (bfd_udp_main.vnet_main, sw_if_index); + vnet_get_sw_interface_or_null (bfd_udp_main.vnet_main, sw_if_index); u8 local_ip_valid = 0; ip_interface_address_t *ia = NULL; if (!sw_if) -- cgit 1.2.3-korg