Adding upstream version 4.2.2.upstream/4.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 388 insertions, 0 deletions

diff --git a/epan/address.h b/epan/address.h
new file mode 100644
index 0000000..ab40b6a
--- /dev/null
+++ b/epan/address.h
@@ -0,0 +1,388 @@
+/** @file
+ * Definitions for structures storing addresses, and for the type of
+ * variables holding port-type values
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __ADDRESS_H__
+#define __ADDRESS_H__
+
+#include <string.h>     /* for memcmp */
+
+#include "tvbuff.h"
+#include <epan/wmem_scopes.h>
+#include <wsutil/ws_assert.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Types of "global" addresses Wireshark knows about. */
+/* Address types can be added here if there are many dissectors that use them or just
+ * within a specific dissector.
+ * If an address type is added here, it must be "registered" within address_types.c
+ * For dissector address types, just use the address_type_dissector_register function
+ * from address_types.h
+ *
+ * AT_NUMERIC - a numeric address type can consist of a guint8, guint16, guint32 or guint64
+ * value. If no correct length is provided, to avoid data bleed, a guint8 is
+ * assumed. Only representation (aka conversion of value to string) is implemented for this type.
+ */
+typedef enum {
+    AT_NONE,               /* no link-layer address */
+    AT_ETHER,              /* MAC (Ethernet, 802.x, FDDI) address */
+    AT_IPv4,               /* IPv4 */
+    AT_IPv6,               /* IPv6 */
+    AT_IPX,                /* IPX */
+    AT_FC,                 /* Fibre Channel */
+    AT_FCWWN,              /* Fibre Channel WWN */
+    AT_STRINGZ,            /* null-terminated string */
+    AT_EUI64,              /* IEEE EUI-64 */
+    AT_IB,                 /* Infiniband GID/LID */
+    AT_AX25,               /* AX.25 */
+    AT_VINES,              /* Banyan Vines address */
+    AT_NUMERIC,            /* Numeric address type. */
+    AT_MCTP,               /* MCTP */
+
+    AT_END_OF_LIST         /* Must be last in list */
+} address_type;
+
+typedef struct _address {
+    int           type;         /* type of address */
+    int           len;          /* length of address, in bytes */
+    const void   *data;         /* pointer to address data */
+
+    /* private */
+    void         *priv;
+} address;
+
+#define ADDRESS_INIT(type, len, data) {type, len, data, NULL}
+#define ADDRESS_INIT_NONE ADDRESS_INIT(AT_NONE, 0, NULL)
+
+static inline void
+clear_address(address *addr)
+{
+    addr->type = AT_NONE;
+    addr->len  = 0;
+    addr->data = NULL;
+    addr->priv = NULL;
+}
+
+/** Initialize an address with the given values.
+ *
+ * @param addr [in,out] The address to initialize.
+ * @param addr_type [in] Address type.
+ * @param addr_len [in] The length in bytes of the address data. For example, 4 for
+ *                     AT_IPv4 or sizeof(ws_in6_addr) for AT_IPv6.
+ * @param addr_data [in] Pointer to the address data.
+ */
+static inline void
+set_address(address *addr, int addr_type, int addr_len, const void *addr_data) {
+    if (addr_len == 0) {
+        /* Zero length must mean no data */
+        ws_assert(addr_data == NULL);
+    } else {
+        /* Must not be AT_NONE - AT_NONE must have no data */
+        ws_assert(addr_type != AT_NONE);
+        /* Make sure we *do* have data */
+        ws_assert(addr_data != NULL);
+    }
+    addr->type = addr_type;
+    addr->len  = addr_len;
+    addr->data = addr_data;
+    addr->priv = NULL;
+}
+
+/** Initialize an address from TVB data.
+ *
+ * Same as set_address but it takes a TVB and an offset. This is preferred
+ * over passing the return value of tvb_get_ptr() to set_address().
+ *
+ * This calls tvb_get_ptr() (including throwing any exceptions) before
+ * modifying the address.
+ *
+ * @param addr [in,out] The address to initialize.
+ * @param addr_type [in] Address type.
+ * @param tvb [in] Pointer to the TVB.
+ * @param offset [in] Offset within the TVB.
+ * @param addr_len [in] The length in bytes of the address data. For example, 4 for
+ *                     AT_IPv4 or sizeof(ws_in6_addr) for AT_IPv6.
+ */
+static inline void
+set_address_tvb(address *addr, int addr_type, int addr_len, tvbuff_t *tvb, int offset) {
+    const void *p;
+
+    if (addr_len != 0) {
+        /* Must not be AT_NONE - AT_NONE must have no data */
+        ws_assert(addr_type != AT_NONE);
+        p = tvb_get_ptr(tvb, offset, addr_len);
+    } else
+        p = NULL;
+    set_address(addr, addr_type, addr_len, p);
+}
+
+/** Initialize an address with the given values, allocating a new buffer
+ * for the address data using wmem-scoped memory.
+ *
+ * @param scope [in] The lifetime of the allocated memory, e.g., pinfo->pool
+ * @param addr [in,out] The address to initialize.
+ * @param addr_type [in] Address type.
+ * @param addr_len [in] The length in bytes of the address data. For example, 4 for
+ *                     AT_IPv4 or sizeof(ws_in6_addr) for AT_IPv6.
+ * @param addr_data [in] Pointer to the address data.
+ */
+static inline void
+alloc_address_wmem(wmem_allocator_t *scope, address *addr,
+                        int addr_type, int addr_len, const void *addr_data) {
+    ws_assert(addr);
+    clear_address(addr);
+    addr->type = addr_type;
+    if (addr_len == 0) {
+        /* Zero length must mean no data */
+        ws_assert(addr_data == NULL);
+        /* Nothing to copy */
+        return;
+    }
+    /* Must not be AT_NONE - AT_NONE must have no data */
+    ws_assert(addr_type != AT_NONE);
+    /* Make sure we *do* have data to copy */
+    ws_assert(addr_data != NULL);
+    addr->data = addr->priv = wmem_memdup(scope, addr_data, addr_len);
+    addr->len = addr_len;
+}
+
+/** Allocate an address from TVB data.
+ *
+ * Same as alloc_address_wmem but it takes a TVB and an offset.
+ *
+ * @param scope [in] The lifetime of the allocated memory, e.g., pinfo->pool
+ * @param addr [in,out] The address to initialize.
+ * @param addr_type [in] Address type.
+ * @param addr_len [in] The length in bytes of the address data. For example, 4 for
+ *                     AT_IPv4 or sizeof(ws_in6_addr) for AT_IPv6.
+ * @param tvb [in] Pointer to the TVB.
+ * @param offset [in] Offset within the TVB.
+ */
+static inline void
+alloc_address_tvb(wmem_allocator_t *scope, address *addr,
+                    int addr_type, int addr_len,  tvbuff_t *tvb, int offset) {
+    const void *p;
+
+    p = tvb_get_ptr(tvb, offset, addr_len);
+    alloc_address_wmem(scope, addr, addr_type, addr_len, p);
+}
+
+/** Compare two addresses.
+ *
+ * @param addr1 [in] The first address to compare.
+ * @param addr2 [in] The second address to compare.
+ * @return 0 if the addresses are equal,
+ *  A positive number if addr1 > addr2 in some nondefined metric,
+ *  A negative number if addr1 < addr2 in some nondefined metric.
+ */
+static inline int
+cmp_address(const address *addr1, const address *addr2) {
+    if (addr1->type > addr2->type) return 1;
+    if (addr1->type < addr2->type) return -1;
+    if (addr1->len  > addr2->len) return 1;
+    if (addr1->len  < addr2->len) return -1;
+    if (addr1->len == 0) {
+        /*
+         * memcmp(NULL, NULL, 0) is *not* guaranteed to work, so
+         * if both addresses are zero-length, don't compare them
+         * (there's nothing to compare, so they're equal).
+         */
+        return 0;
+    }
+    return memcmp(addr1->data, addr2->data, addr1->len);
+}
+
+/** Check two addresses for equality.
+ *
+ * Given two addresses, return "true" if they're equal, "false" otherwise.
+ * Addresses are equal only if they have the same type and length; if the
+ * length is zero, they are then equal, otherwise the data must be the
+ * same.
+ *
+ * @param addr1 [in] The first address to compare.
+ * @param addr2 [in] The second address to compare.
+ * @return TRUE if the addresses are equal, FALSE otherwise.
+ */
+static inline gboolean
+addresses_equal(const address *addr1, const address *addr2) {
+    /*
+     * memcmp(NULL, NULL, 0) is *not* guaranteed to work, so
+     * if both addresses are zero-length, don't compare them
+     * (there's nothing to compare, so they're equal).
+     */
+    if (addr1->type == addr2->type &&
+        addr1->len == addr2->len &&
+        (addr1->len == 0 ||
+         memcmp(addr1->data, addr2->data, addr1->len) == 0))
+        return TRUE;
+    return FALSE;
+}
+
+/** Check the data of two addresses for equality.
+ *
+ * Given two addresses, return "true" if they have the same length and,
+ * their data is equal, "false" otherwise.
+ * The address types are ignored. This can be used to compare custom
+ * address types defined with address_type_dissector_register.
+ *
+ * @param addr1 [in] The first address to compare.
+ * @param addr2 [in] The second address to compare.
+ * @return TRUE if the addresses are equal, FALSE otherwise.
+ */
+static inline gboolean
+addresses_data_equal(const address *addr1, const address *addr2) {
+    if ( addr1->len == addr2->len
+            && memcmp(addr1->data, addr2->data, addr1->len) == 0
+            ) return TRUE;
+    return FALSE;
+}
+
+/** Perform a shallow copy of the address (both addresses point to the same
+ * memory location).
+ *
+ * @param to [in,out] The destination address.
+ * @param from [in] The source address.
+ *
+ * \warning Make sure 'from' memory stays valid for the lifetime of this object.
+ * Also it's strongly recommended to use this function instead of copy-assign.
+ */
+static inline void
+copy_address_shallow(address *to, const address *from) {
+    set_address(to, from->type, from->len, from->data);
+}
+
+/** Copy an address, allocating a new buffer for the address data
+ *  using wmem-scoped memory.
+ *
+ * @param scope [in] The lifetime of the allocated memory, e.g., pinfo->pool
+ * @param to [in,out] The destination address.
+ * @param from [in] The source address.
+ */
+static inline void
+copy_address_wmem(wmem_allocator_t *scope, address *to, const address *from) {
+    alloc_address_wmem(scope, to, from->type, from->len, from->data);
+}
+
+/** Copy an address, allocating a new buffer for the address data.
+ *
+ * @param to [in,out] The destination address.
+ * @param from [in] The source address.
+ */
+static inline void
+copy_address(address *to, const address *from) {
+    copy_address_wmem(NULL, to, from);
+}
+
+/** Free an address allocated with wmem-scoped memory.
+ *
+ * @param scope [in] The lifetime of the allocated memory, e.g., pinfo->pool
+ * @param addr [in,out] The address whose data to free.
+ */
+static inline void
+free_address_wmem(wmem_allocator_t *scope, address *addr) {
+    /* Because many dissectors set 'type = AT_NONE' to mean clear we check for that */
+    if (addr->type != AT_NONE && addr->len > 0 && addr->priv != NULL) {
+        /* Make sure API use is correct */
+        /* if priv is not null then data == priv */
+        ws_assert(addr->data == addr->priv);
+        wmem_free(scope, addr->priv);
+    }
+    clear_address(addr);
+}
+
+/** Free an address.
+ *
+ * @param addr [in,out] The address whose data to free.
+ */
+static inline void
+free_address(address *addr) {
+    free_address_wmem(NULL, addr);
+}
+
+/** Hash an address into a hash value (which must already have been set).
+ *
+ * @param hash_val The existing hash value.
+ * @param addr The address to add.
+ * @return The new hash value.
+ */
+static inline guint
+add_address_to_hash(guint hash_val, const address *addr) {
+    const guint8 *hash_data = (const guint8 *)(addr)->data;
+    int idx;
+
+    for (idx = 0; idx < (addr)->len; idx++) {
+        hash_val += hash_data[idx];
+        hash_val += ( hash_val << 10 );
+        hash_val ^= ( hash_val >> 6 );
+    }
+    return hash_val;
+}
+
+/** Hash an address into a hash value (which must already have been set).
+ *  64-bit version of add_address_to_hash().
+ *
+ * @param hash_val The existing hash value.
+ * @param addr The address to add.
+ * @return The new hash value.
+ */
+static inline guint64
+add_address_to_hash64(guint64 hash_val, const address *addr) {
+    const guint8 *hash_data = (const guint8 *)(addr)->data;
+    int idx;
+
+    for (idx = 0; idx < (addr)->len; idx++) {
+        hash_val += hash_data[idx];
+        hash_val += ( hash_val << 10 );
+        hash_val ^= ( hash_val >> 6 );
+    }
+    return hash_val;
+}
+
+WS_DLL_PUBLIC guint address_to_bytes(const address *addr, guint8 *buf, guint buf_len);
+
+/* Types of port numbers Wireshark knows about. */
+typedef enum {
+    PT_NONE,            /* no port number */
+    PT_SCTP,            /* SCTP */
+    PT_TCP,             /* TCP */
+    PT_UDP,             /* UDP */
+    PT_DCCP,            /* DCCP */
+    PT_IPX,             /* IPX sockets */
+    PT_DDP,             /* DDP AppleTalk connection */
+    PT_IDP,             /* XNS IDP sockets */
+    PT_USB,             /* USB endpoint 0xffff means the host */
+    PT_I2C,
+    PT_IBQP,            /* Infiniband QP number */
+    PT_BLUETOOTH,
+    PT_IWARP_MPA,       /* iWarp MPA */
+    PT_MCTP
+} port_type;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __ADDRESS_H__ */
+
+/*
+ * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */