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-rw-r--r--guix/build/syscalls.scm42
1 files changed, 42 insertions, 0 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm
index 1ad6cb4618..f4d4d155ec 100644
--- a/guix/build/syscalls.scm
+++ b/guix/build/syscalls.scm
@@ -87,10 +87,12 @@
all-network-interface-names
network-interface-names
network-interface-flags
+ network-interface-netmask
loopback-network-interface?
network-interface-address
set-network-interface-flags
set-network-interface-address
+ set-network-interface-netmask
set-network-interface-up
configure-network-interface
@@ -764,6 +766,14 @@ exception if it's already taken."
(if (string-contains %host-type "linux")
#x8916 ;GNU/Linux
-1)) ;FIXME: GNU/Hurd?
+(define SIOCGIFNETMASK
+ (if (string-contains %host-type "linux")
+ #x891b ;GNU/Linux
+ -1)) ;FIXME: GNU/Hurd?
+(define SIOCSIFNETMASK
+ (if (string-contains %host-type "linux")
+ #x891c ;GNU/Linux
+ -1)) ;FIXME: GNU/Hurd?
;; Flags and constants from <net/if.h>.
@@ -970,6 +980,22 @@ interface NAME."
(list name (strerror err))
(list err))))))
+(define (set-network-interface-netmask socket name sockaddr)
+ "Set the network mask of interface NAME to SOCKADDR."
+ (let ((req (make-bytevector ifreq-struct-size)))
+ (bytevector-copy! (string->utf8 name) 0 req 0
+ (min (string-length name) (- IF_NAMESIZE 1)))
+ ;; Set the 'ifr_addr' field.
+ (write-socket-address! sockaddr req IF_NAMESIZE)
+ (let-values (((ret err)
+ (%ioctl (fileno socket) SIOCSIFNETMASK
+ (bytevector->pointer req))))
+ (unless (zero? ret)
+ (throw 'system-error "set-network-interface-netmask"
+ "set-network-interface-netmask on ~A: ~A"
+ (list name (strerror err))
+ (list err))))))
+
(define (network-interface-address socket name)
"Return the address of network interface NAME. The result is an object of
the same type as that returned by 'make-socket-address'."
@@ -986,6 +1012,22 @@ the same type as that returned by 'make-socket-address'."
(list name (strerror err))
(list err))))))
+(define (network-interface-netmask socket name)
+ "Return the netmask of network interface NAME. The result is an object of
+the same type as that returned by 'make-socket-address'."
+ (let ((req (make-bytevector ifreq-struct-size)))
+ (bytevector-copy! (string->utf8 name) 0 req 0
+ (min (string-length name) (- IF_NAMESIZE 1)))
+ (let-values (((ret err)
+ (%ioctl (fileno socket) SIOCGIFNETMASK
+ (bytevector->pointer req))))
+ (if (zero? ret)
+ (read-socket-address req IF_NAMESIZE)
+ (throw 'system-error "network-interface-netmask"
+ "network-interface-netmask on ~A: ~A"
+ (list name (strerror err))
+ (list err))))))
+
(define (configure-network-interface name sockaddr flags)
"Configure network interface NAME to use SOCKADDR, an address as returned by
'make-socket-address', and FLAGS, a bitwise-or of IFF_* constants."