5d594d012d
socket_bind_to_ifindex() uses the the SO_BINDTOIFINDEX sockopt of kernel 5.0, with a fallback to SO_BINDTODEVICE on older kernels. socket_bind_to_ifname() is a trivial wrapper around SO_BINDTODEVICE, the only benefit of using it instead of SO_BINDTODEVICE directly is that it determines the size of the interface name properly so that it also works for unbinding. Moreover, it's an attempt to unify our invocations of the sockopt with a size of strlen(ifname) rather than strlen(ifname)+1...
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#pragma once
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#include <sys/socket.h>
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#if HAVE_LINUX_VM_SOCKETS_H
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#include <linux/vm_sockets.h>
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#else
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#define VMADDR_CID_ANY -1U
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struct sockaddr_vm {
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unsigned short svm_family;
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unsigned short svm_reserved1;
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unsigned int svm_port;
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unsigned int svm_cid;
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unsigned char svm_zero[sizeof(struct sockaddr) -
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sizeof(unsigned short) -
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sizeof(unsigned short) -
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sizeof(unsigned int) -
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sizeof(unsigned int)];
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};
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#endif /* !HAVE_LINUX_VM_SOCKETS_H */
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#ifndef AF_VSOCK
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#define AF_VSOCK 40
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#endif
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#ifndef SO_REUSEPORT
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#define SO_REUSEPORT 15
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#endif
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#ifndef SO_PEERGROUPS
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#define SO_PEERGROUPS 59
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#endif
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#ifndef SO_BINDTOIFINDEX
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#define SO_BINDTOIFINDEX 62
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#endif
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#ifndef SOL_NETLINK
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#define SOL_NETLINK 270
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#endif
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#ifndef SOL_ALG
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#define SOL_ALG 279
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#endif
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/* Not exposed yet. Defined in include/linux/socket.h. */
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#ifndef SOL_SCTP
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#define SOL_SCTP 132
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#endif
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/* Not exposed yet. Defined in include/linux/socket.h */
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#ifndef SCM_SECURITY
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#define SCM_SECURITY 0x03
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#endif
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/* netinet/in.h */
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#ifndef IP_FREEBIND
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#define IP_FREEBIND 15
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#endif
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#ifndef IP_TRANSPARENT
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#define IP_TRANSPARENT 19
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#endif
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