Florian Fainelli
16 years ago
parent
c4f83e0b0c
commit
efd3eac055
@ -0,0 +1,469 @@
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diff -urN libpcap-0.9.8/gencode.c.rej libpcap-0.9.8.new/gencode.c.rej
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--- libpcap-0.9.8/gencode.c.rej 2007-07-10 21:38:15.000000000 +0200
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+++ libpcap-0.9.8.new/gencode.c.rej 1970-01-01 01:00:00.000000000 +0100
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@@ -1,465 +0,0 @@
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-***************
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-*** 24,29 ****
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- "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.221.2.51 2007/06/14 20:54:12 gianluca Exp $ (LBL)";
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- #endif
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-
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- #ifdef HAVE_CONFIG_H
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- #include "config.h"
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- #endif
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---- 24,31 ----
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- "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.221.2.51 2007/06/14 20:54:12 gianluca Exp $ (LBL)";
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- #endif
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-
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-+ #define ENABLE_WLAN_FILTERING_PATCH
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-+
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- #ifdef HAVE_CONFIG_H
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- #include "config.h"
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- #endif
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-***************
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-*** 144,150 ****
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- OR_NET, /* relative to the network-layer header */
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- OR_NET_NOSNAP, /* relative to the network-layer header, with no SNAP header at the link layer */
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- OR_TRAN_IPV4, /* relative to the transport-layer header, with IPv4 network layer */
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-- OR_TRAN_IPV6 /* relative to the transport-layer header, with IPv6 network layer */
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- };
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-
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- /*
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---- 146,153 ----
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- OR_NET, /* relative to the network-layer header */
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- OR_NET_NOSNAP, /* relative to the network-layer header, with no SNAP header at the link layer */
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- OR_TRAN_IPV4, /* relative to the transport-layer header, with IPv4 network layer */
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-+ OR_TRAN_IPV6, /* relative to the transport-layer header, with IPv6 network layer */
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-+ OR_LINK_AFTER_WIRELESS_HDR /* After the 802.11 variable length header */
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- };
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-
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- /*
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-***************
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-*** 199,204 ****
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- static struct block *gen_linktype(int);
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- static struct block *gen_snap(bpf_u_int32, bpf_u_int32, u_int);
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- static struct block *gen_llc_linktype(int);
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- static struct block *gen_hostop(bpf_u_int32, bpf_u_int32, int, int, u_int, u_int);
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- #ifdef INET6
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- static struct block *gen_hostop6(struct in6_addr *, struct in6_addr *, int, int, u_int, u_int);
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---- 202,208 ----
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- static struct block *gen_linktype(int);
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- static struct block *gen_snap(bpf_u_int32, bpf_u_int32, u_int);
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- static struct block *gen_llc_linktype(int);
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-+ static struct block *gen_802_11_llc_linktype(int);
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- static struct block *gen_hostop(bpf_u_int32, bpf_u_int32, int, int, u_int, u_int);
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- #ifdef INET6
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- static struct block *gen_hostop6(struct in6_addr *, struct in6_addr *, int, int, u_int, u_int);
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-***************
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-*** 242,247 ****
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- static struct slist *xfer_to_a(struct arth *);
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- static struct block *gen_mac_multicast(int);
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- static struct block *gen_len(int, int);
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-
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- static struct block *gen_ppi_dlt_check();
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- static struct block *gen_msg_abbrev(int type);
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---- 246,252 ----
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- static struct slist *xfer_to_a(struct arth *);
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- static struct block *gen_mac_multicast(int);
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- static struct block *gen_len(int, int);
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-+ static struct block *gen_check_802_11_data_frame();
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-
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- static struct block *gen_ppi_dlt_check();
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- static struct block *gen_msg_abbrev(int type);
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-***************
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-*** 1345,1350 ****
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- return s;
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- }
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-
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-
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- /*
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- * Load a value relative to the beginning of the specified header.
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---- 1350,1487 ----
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- return s;
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- }
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-
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-+ /*
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-+ * Load a value relative to the beginning of the link-layer header after the 802.11
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-+ * header, i.e. LLC_SNAP.
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-+ * The link-layer header doesn't necessarily begin at the beginning
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-+ * of the packet data; there might be a variable-length prefix containing
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-+ * radio information.
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-+ */
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-+ static struct slist *
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-+ gen_load_ll_after_802_11_rel(offset, size)
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-+ u_int offset, size;
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-+ {
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-+ struct slist *s, *s_load_fc;
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-+ struct slist *sjset_qos;
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-+ struct slist *s_load;
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-+ struct slist *s_ld_a_2;
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-+ struct slist *s_add_a_x;
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-+ struct slist *s_a_to_x;
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-+ struct slist *sjset_data_frame_1;
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-+ struct slist *sjset_data_frame_2;
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-+ struct slist *s_load_x_0;
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-+
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-+ /*
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-+ * This code is not compatible with the optimizer, as
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-+ * we are generating jmp instructions within a normal
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-+ * slist of instructions
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-+ *
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-+ */
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-+ no_optimize = 1;
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-+
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-+ s = gen_llprefixlen();
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-+
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-+ /*
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-+ * If "s" is non-null, it has code to arrange that the X register
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-+ * contains the length of the prefix preceding the link-layer
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-+ * header.
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-+ *
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-+ * Otherwise, the length of the prefix preceding the link-layer
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-+ * header is "off_ll".
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-+ */
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-+ if (s != NULL) {
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-+ /*
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-+ * There's a variable-length prefix preceding the
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-+ * link-layer header. "s" points to a list of statements
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-+ * that put the length of that prefix into the X register.
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-+ * do an indirect load, to use the X register as an offset.
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-+ */
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-+
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-+ /*
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-+ * Load the Frame Control field
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-+ */
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-+ s_load_fc = new_stmt(BPF_LD|BPF_IND|BPF_B);
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-+ s_load_fc->s.k = 0;
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-+ } else {
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-+ /*
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-+ * There is no variable-length header preceding the
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-+ * link-layer header; add in off_ll, which, if there's
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-+ * a fixed-length header preceding the link-layer header,
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-+ * is the length of that header.
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-+ */
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-+
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-+ /*
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-+ * We need to load the Frame control directly, and
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-+ * then load X with a fake 0, i.e. the length of the
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-+ * non-existing prepended header
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-+ */
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-+
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-+ /*
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-+ * TODO GV: I'm not sure if 0 is the right constant in this
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-+ * case. If the link layer has a fixed length prepended header,
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-+ * that should be the value that we put here
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-+ */
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-+
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-+ /* Load 0 into X */
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-+ s_load_x_0 = new_stmt(BPF_LDX|BPF_IMM);
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-+ s_load_x_0->s.k = 0;
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-+
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-+ /*
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-+ * TODO GV: I'm not sure if 0 is the right constant in this
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-+ * case. If the link layer has a fixed length prepended header,
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-+ * that should be the value that we put here
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-+ */
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-+
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-+ /*
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-+ * load the Frame Control with absolute access
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-+ */
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-+ s_load_fc = new_stmt(BPF_LD|BPF_ABS|BPF_B);
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-+ s_load_fc->s.k = 0;
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-+ s = s_load_x_0;
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-+ }
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-+
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-+ /*
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-+ * Generate the common instructions to check if it's a data frame
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-+ * and if so compute the 802.11 header length
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-+ */
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-+ sjset_data_frame_1 = new_stmt(JMP(BPF_JSET)); // b3 should be 1
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-+ sjset_data_frame_1->s.k = 0x8;
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-+
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-+ sjset_data_frame_2 = new_stmt(JMP(BPF_JSET)); // b2 should be 0
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-+ sjset_data_frame_2->s.k = 0x04;
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-+
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-+ sjset_qos = new_stmt(JMP(BPF_JSET));
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-+ sjset_qos->s.k = 0x80; //QOS bit
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-+
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-+ s_ld_a_2 = new_stmt(BPF_LD|BPF_IMM);
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-+ s_ld_a_2->s.k = 2;
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-+
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-+ s_add_a_x = new_stmt(BPF_ALU|BPF_ADD|BPF_X);
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-+ s_a_to_x = new_stmt(BPF_MISC|BPF_TAX);
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-+
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-+ s_load = new_stmt(BPF_LD|BPF_IND|size);
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-+ s_load->s.k = offset;
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-+
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-+ sjset_data_frame_1->s.jt = sjset_data_frame_2;
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-+ sjset_data_frame_1->s.jf = s_load;
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-+
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-+ sjset_data_frame_2->s.jt = s_load;
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-+ sjset_data_frame_2->s.jf = sjset_qos;
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-+
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-+ sjset_qos->s.jt = s_ld_a_2;
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-+ sjset_qos->s.jf = s_load;
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-+
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-+ sappend(s, s_load_fc);
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-+ sappend(s_load_fc, sjset_data_frame_1);
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-+ sappend(sjset_data_frame_1, sjset_data_frame_2);
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-+ sappend(sjset_data_frame_2, sjset_qos);
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-+ sappend(sjset_qos, s_ld_a_2);
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-+ sappend(s_ld_a_2, s_add_a_x);
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-+ sappend(s_add_a_x,s_a_to_x);
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-+ sappend(s_a_to_x, s_load);
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-+
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-+ return s;
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-+ }
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-
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- /*
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- * Load a value relative to the beginning of the specified header.
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-***************
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-*** 1367,1372 ****
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- s = gen_load_llrel(offset, size);
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- break;
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-
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- case OR_NET:
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- s = gen_load_llrel(off_nl + offset, size);
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- break;
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---- 1504,1525 ----
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- s = gen_load_llrel(offset, size);
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- break;
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-
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-+ #ifdef ENABLE_WLAN_FILTERING_PATCH
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-+
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-+ case OR_LINK_AFTER_WIRELESS_HDR:
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-+ if (linktype != DLT_IEEE802_11_RADIO
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-+ && linktype != DLT_PPI
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-+ && linktype != DLT_IEEE802_11
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-+ && linktype != DLT_PRISM_HEADER
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-+ && linktype != DLT_IEEE802_11_RADIO_AVS)
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-+ {
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-+ abort();
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-+ return NULL;
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-+ }
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-+ s = gen_load_ll_after_802_11_rel(offset + 24, size);
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-+ break;
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-+ #endif /* ENABLE_WLAN_FILTERING_PATCH */
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-+
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- case OR_NET:
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- s = gen_load_llrel(off_nl + offset, size);
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- break;
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-***************
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-*** 2163,2173 ****
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- break;
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-
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- case DLT_PPI:
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- case DLT_FDDI:
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- case DLT_IEEE802:
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-- case DLT_IEEE802_11:
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- case DLT_IEEE802_11_RADIO_AVS:
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-- case DLT_IEEE802_11_RADIO:
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- case DLT_PRISM_HEADER:
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- case DLT_ATM_RFC1483:
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- case DLT_ATM_CLIP:
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---- 2316,2332 ----
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- break;
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-
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- case DLT_PPI:
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-+ case DLT_IEEE802_11_RADIO:
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-+ case DLT_IEEE802_11:
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-+ #ifdef ENABLE_WLAN_FILTERING_PATCH
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-+ return gen_802_11_llc_linktype(proto);
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-+ /*NOTREACHED*/
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-+ break;
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-+ #endif /* ENABLE_WLAN_FILTERING_PATCH */
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-+
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- case DLT_FDDI:
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- case DLT_IEEE802:
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- case DLT_IEEE802_11_RADIO_AVS:
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- case DLT_PRISM_HEADER:
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- case DLT_ATM_RFC1483:
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- case DLT_ATM_CLIP:
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-***************
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-*** 2711,2716 ****
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- }
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- }
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-
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- static struct block *
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- gen_hostop(addr, mask, dir, proto, src_off, dst_off)
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- bpf_u_int32 addr;
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---- 2870,2982 ----
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- }
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- }
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-
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-+ /*
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-+ * Generate code to match a particular packet type, for link-layer types
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-+ * using 802.2 LLC headers.
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-+ *
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-+ * This is *NOT* used for Ethernet; "gen_ether_linktype()" is used
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-+ * for that - it handles the D/I/X Ethernet vs. 802.3+802.2 issues.
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-+ *
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-+ * "proto" is an Ethernet type value, if > ETHERMTU, or an LLC SAP
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-+ * value, if <= ETHERMTU. We use that to determine whether to
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-+ * match the DSAP or both DSAP and LSAP or to check the OUI and
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-+ * protocol ID in a SNAP header.
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-+ */
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-+ static struct block *
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-+ gen_802_11_llc_linktype(proto)
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-+ int proto;
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-+ {
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-+ struct block *b_check_data_frame;
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-+ struct block *b_check_linktype;
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-+
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-+ b_check_data_frame = gen_check_802_11_data_frame();
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-+
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-+ /*
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-+ * XXX - generate the code that discards non data frames
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-+ */
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-+ switch (proto) {
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-+
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-+ case LLCSAP_IP:
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-+ case LLCSAP_ISONS:
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-+ case LLCSAP_NETBEUI:
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-+ /*
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-+ * XXX - should we check both the DSAP and the
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-+ * SSAP, like this, or should we check just the
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-+ * DSAP, as we do for other types <= ETHERMTU
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-+ * (i.e., other SAP values)?
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-+ */
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-+ b_check_linktype = gen_cmp(OR_LINK_AFTER_WIRELESS_HDR, 0, BPF_H, (bpf_u_int32)
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-+ ((proto << 8) | proto));
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-+ break;
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-+
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-+ case LLCSAP_IPX:
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-+ /*
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-+ * XXX - are there ever SNAP frames for IPX on
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-+ * non-Ethernet 802.x networks?
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-+ */
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-+ b_check_linktype = gen_cmp(OR_LINK_AFTER_WIRELESS_HDR, 0, BPF_B,
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-+ (bpf_int32)LLCSAP_IPX);
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-+
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-+ break;
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-+
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-+ #if 0
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-+ case ETHERTYPE_ATALK:
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-+ /*
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-+ * 802.2-encapsulated ETHERTYPE_ATALK packets are
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-+ * SNAP packets with an organization code of
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-+ * 0x080007 (Apple, for Appletalk) and a protocol
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-+ * type of ETHERTYPE_ATALK (Appletalk).
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-+ *
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-+ * XXX - check for an organization code of
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-+ * encapsulated Ethernet as well?
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-+ */
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-+ return gen_snap(0x080007, ETHERTYPE_ATALK, off_linktype);
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-+ #endif
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-+ default:
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-+ /*
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-+ * XXX - we don't have to check for IPX 802.3
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-+ * here, but should we check for the IPX Ethertype?
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-+ */
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-+ if (proto <= ETHERMTU) {
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||||
-+ /*
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-+ * This is an LLC SAP value, so check
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-+ * the DSAP.
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-+ */
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-+ b_check_linktype = gen_cmp(OR_LINK_AFTER_WIRELESS_HDR, 0, BPF_B,
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-+ (bpf_int32)proto);
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-+ } else {
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-+ /*
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-+ * This is an Ethernet type; we assume that it's
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-+ * unlikely that it'll appear in the right place
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-+ * at random, and therefore check only the
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-+ * location that would hold the Ethernet type
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-+ * in a SNAP frame with an organization code of
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-+ * 0x000000 (encapsulated Ethernet).
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-+ *
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-+ * XXX - if we were to check for the SNAP DSAP and
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-+ * LSAP, as per XXX, and were also to check for an
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-+ * organization code of 0x000000 (encapsulated
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-+ * Ethernet), we'd do
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-+ *
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-+ * return gen_snap(0x000000, proto,
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-+ * off_linktype);
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-+ *
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-+ * here; for now, we don't, as per the above.
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-+ * I don't know whether it's worth the extra CPU
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-+ * time to do the right check or not.
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||||
-+ */
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-+ b_check_linktype = gen_cmp(OR_LINK_AFTER_WIRELESS_HDR, 0+6, BPF_H,
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-+ (bpf_int32)proto);
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-+ }
|
||||
-+ }
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||||
-+
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-+ gen_and(b_check_data_frame, b_check_linktype);
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-+ return b_check_linktype;
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||||
-+
|
||||
-+ }
|
||||
-+
|
||||
-+
|
||||
-+
|
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- static struct block *
|
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- gen_hostop(addr, mask, dir, proto, src_off, dst_off)
|
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- bpf_u_int32 addr;
|
||||
-***************
|
||||
-*** 2925,2930 ****
|
||||
- register struct block *b0, *b1, *b2;
|
||||
- register struct slist *s;
|
||||
-
|
||||
- switch (dir) {
|
||||
- case Q_SRC:
|
||||
- /*
|
||||
---- 3191,3207 ----
|
||||
- register struct block *b0, *b1, *b2;
|
||||
- register struct slist *s;
|
||||
-
|
||||
-+ #ifdef ENABLE_WLAN_FILTERING_PATCH
|
||||
-+ /*
|
||||
-+ * TODO GV 20070613
|
||||
-+ * We need to disable the optimizer because the optimizer is buggy
|
||||
-+ * and wipes out some LD instructions generated by the below
|
||||
-+ * code to validate the Frame Control bits
|
||||
-+ *
|
||||
-+ */
|
||||
-+ no_optimize = 1;
|
||||
-+ #endif /* ENABLE_WLAN_FILTERING_PATCH */
|
||||
-+
|
||||
- switch (dir) {
|
||||
- case Q_SRC:
|
||||
- /*
|
||||
-***************
|
||||
-*** 4713,4718 ****
|
||||
- #endif
|
||||
- }
|
||||
-
|
||||
-
|
||||
- /*
|
||||
- * Generate code that checks whether the packet is a packet for protocol
|
||||
---- 4990,5021 ----
|
||||
- #endif
|
||||
- }
|
||||
-
|
||||
-+ static struct block *
|
||||
-+ gen_check_802_11_data_frame()
|
||||
-+ {
|
||||
-+ struct slist *s;
|
||||
-+ struct block *b0, *b1;
|
||||
-+ /*
|
||||
-+ * Now check for a data frame.
|
||||
-+ * I.e, check "link[0] & 0x08".
|
||||
-+ */
|
||||
-+ s = gen_load_a(OR_LINK, 0, BPF_B);
|
||||
-+ b0 = new_block(JMP(BPF_JSET));
|
||||
-+ b0->s.k = 0x08;
|
||||
-+ b0->stmts = s;
|
||||
-+
|
||||
-+ s = gen_load_a(OR_LINK, 0, BPF_B);
|
||||
-+ b1 = new_block(JMP(BPF_JSET));
|
||||
-+ b1->s.k = 0x04;
|
||||
-+ b1->stmts = s;
|
||||
-+ gen_not(b1);
|
||||
-+
|
||||
-+
|
||||
-+ gen_and(b1, b0);
|
||||
-+
|
||||
-+ return b0;
|
||||
-+ }
|
||||
-+
|
||||
-
|
||||
- /*
|
||||
- * Generate code that checks whether the packet is a packet for protocol
|
||||
Loading…
Reference in New Issue