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| author | rwatson <rwatson@FreeBSD.org> | 2002-07-31 19:06:49 +0000 |
|---|---|---|
| committer | rwatson <rwatson@FreeBSD.org> | 2002-07-31 19:06:49 +0000 |
| commit | a034d0cd3c7f0d940efed7491eb32a5501cc7f88 (patch) | |
| tree | 5dbdb791ab0455bfa5e2c41167f506be54ce9568 /sys/netinet/tcp_input.c | |
| parent | cf35cc4c684ae09caa3774b8e8971b0a1adfe19a (diff) | |
| download | FreeBSD-src-a034d0cd3c7f0d940efed7491eb32a5501cc7f88.zip FreeBSD-src-a034d0cd3c7f0d940efed7491eb32a5501cc7f88.tar.gz | |
Introduce support for Mandatory Access Control and extensible
kernel access control.
Instrument the TCP socket code for packet generation and delivery:
label outgoing mbufs with the label of the socket, and check socket and
mbuf labels before permitting delivery to a socket. Assign labels
to newly accepted connections when the syncache/cookie code has done
its business. Also set peer labels as convenient. Currently,
MAC policies cannot influence the PCB matching algorithm, so cannot
implement polyinstantiation. Note that there is at least one case
where a PCB is not available due to the TCP packet not being associated
with any socket, so we don't label in that case, but need to handle
it in a special manner.
Obtained from: TrustedBSD Project
Sponsored by: DARPA, NAI Labs
Diffstat (limited to 'sys/netinet/tcp_input.c')
| -rw-r--r-- | sys/netinet/tcp_input.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 431c049..226be18 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -37,11 +37,13 @@ #include "opt_ipfw.h" /* for ipfw_fwd */ #include "opt_inet6.h" #include "opt_ipsec.h" +#include "opt_mac.h" #include "opt_tcpdebug.h" #include "opt_tcp_input.h" #include <sys/param.h> #include <sys/kernel.h> +#include <sys/mac.h> #include <sys/malloc.h> #include <sys/mbuf.h> #include <sys/proc.h> /* for proc0 declaration */ @@ -360,6 +362,9 @@ tcp_input(m, off0) int isipv6; #endif /* INET6 */ struct sockaddr_in *next_hop = NULL; +#ifdef MAC + int error; +#endif int rstreason; /* For badport_bandlim accounting purposes */ /* Grab info from MT_TAG mbufs prepended to the chain. */ @@ -651,6 +656,11 @@ findpcb: tiwin = th->th_win; so = inp->inp_socket; +#ifdef MAC + error = mac_check_socket_receive(so, m); + if (error) + goto drop; +#endif if (so->so_options & (SO_DEBUG|SO_ACCEPTCONN)) { struct in_conninfo inc; #ifdef TCPDEBUG @@ -1171,6 +1181,9 @@ after_listen: tp->t_flags &= ~TF_RCVD_CC; tcpstat.tcps_connects++; soisconnected(so); +#ifdef MAC + mac_set_socket_peer_from_mbuf(m, so); +#endif /* Do window scaling on this connection? */ if ((tp->t_flags & (TF_RCVD_SCALE|TF_REQ_SCALE)) == (TF_RCVD_SCALE|TF_REQ_SCALE)) { |
