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socket: add support for binding sockets to device

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As a Linux-specific feature, allow sockets to be bound to a device using
the SO_BINDTODEVICE socket option. The CAP_NET_RAW capability is
required for setting the option.
This commit is contained in:
Miroslav Lichvar
2020-06-30 10:21:45 +02:00
parent 0f04baeb97
commit 4ef944b734
9 changed files with 45 additions and 20 deletions
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2
cmdmon.c
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@@ -173,7 +173,7 @@ open_socket(int family)
SCK_GetLoopbackIPAddress(family, &local_addr.ip_addr);
local_addr.port = port;
sock_fd = SCK_OpenUdpSocket(NULL, &local_addr, SCK_FLAG_RX_DEST_ADDR);
sock_fd = SCK_OpenUdpSocket(NULL, &local_addr, NULL, SCK_FLAG_RX_DEST_ADDR);
if (sock_fd < 0) {
LOG(LOGS_ERR, "Could not open command socket on %s",
UTI_IPSockAddrToString(&local_addr));