From 7da56de3f73c6f73cec3a5aad3435775e8b979be Mon Sep 17 00:00:00 2001 From: Josh Triplett Date: Wed, 3 Aug 2005 03:03:06 +0000 Subject: Initial revision --- libXamine/COPYING.LIB | 510 +++++++++++++++++++++++ libXamine/Makefile.am | 7 + libXamine/README | 21 + libXamine/configure.ac | 14 + libXamine/debian/changelog | 5 + libXamine/debian/compat | 1 + libXamine/debian/control | 36 ++ libXamine/debian/copyright | 26 ++ libXamine/debian/libxamine-dev.dirs | 2 + libXamine/debian/libxamine-dev.install | 5 + libXamine/debian/libxamine0.dirs | 1 + libXamine/debian/libxamine0.install | 1 + libXamine/debian/rules | 4 + libXamine/libXamine.pc.in | 10 + libXamine/src/strsplit.c | 96 +++++ libXamine/src/strsplit.h | 27 ++ libXamine/src/xamine.c | 728 +++++++++++++++++++++++++++++++++ libXamine/src/xamine.h | 126 ++++++ 18 files changed, 1620 insertions(+) create mode 100644 libXamine/COPYING.LIB create mode 100644 libXamine/Makefile.am create mode 100644 libXamine/README create mode 100644 libXamine/configure.ac create mode 100644 libXamine/debian/changelog create mode 100644 libXamine/debian/compat create mode 100644 libXamine/debian/control create mode 100644 libXamine/debian/copyright create mode 100644 libXamine/debian/libxamine-dev.dirs create mode 100644 libXamine/debian/libxamine-dev.install create mode 100644 libXamine/debian/libxamine0.dirs create mode 100644 libXamine/debian/libxamine0.install create mode 100755 libXamine/debian/rules create mode 100644 libXamine/libXamine.pc.in create mode 100644 libXamine/src/strsplit.c create mode 100644 libXamine/src/strsplit.h create mode 100644 libXamine/src/xamine.c create mode 100644 libXamine/src/xamine.h diff --git a/libXamine/COPYING.LIB b/libXamine/COPYING.LIB new file mode 100644 index 0000000..b124cf5 --- /dev/null +++ b/libXamine/COPYING.LIB @@ -0,0 +1,510 @@ + + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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Given a binary X protocol stream, Xamine +can reconstruct the structured tree of requests, replies, events, and errors. + +Xamine is under heavy development; the functionality and interface are subject +to change. + +Currently, Xamine only handles X events. All the code to parse an arbitrary +description is available (though the appropriate hooks are needed to handle +some additional top-level XML tags such as request and error and pass the +contents to the structure-field-handling functions); the main task required to +handle requests and replies is the code which follows those requests and +replies in the stream, finds the appropriate XamineDescription based on the +major/minor number and a reply hash (much like XCB's mechanism), and uses that +for parsing. + +The biggest limitation right now is that the caller must determine the size of +the data to pass to Xamine's parsing functions; this should definitely be +fixed, and users of the Xamine library should be able to pass arbitrary +amounts of data to Xamine until enough is available to provide parsed +structures. diff --git a/libXamine/configure.ac b/libXamine/configure.ac new file mode 100644 index 0000000..c344e92 --- /dev/null +++ b/libXamine/configure.ac @@ -0,0 +1,14 @@ +AC_INIT([libXamine], 0.1, [josh@freedesktop.org]) +AC_CONFIG_SRCDIR([libXamine.pc.in]) +AM_INIT_AUTOMAKE([foreign dist-bzip2 subdir-objects]) + +AC_PROG_LIBTOOL +AC_PROG_CC +AM_PROG_CC_C_O +AC_HEADER_STDC + +PKG_CHECK_MODULES(LIBXML, libxml-2.0) +AC_SUBST(LIBXML_CFLAGS) +AC_SUBST(LIBXML_LIBS) + +AC_OUTPUT([Makefile libXamine.pc]) diff --git a/libXamine/debian/changelog b/libXamine/debian/changelog new file mode 100644 index 0000000..3410731 --- /dev/null +++ b/libXamine/debian/changelog @@ -0,0 +1,5 @@ +xamine (0.1-1) unstable; urgency=low + + * Initial Release. + + -- Josh Triplett Fri, 4 Mar 2005 22:10:19 -0800 diff --git a/libXamine/debian/compat b/libXamine/debian/compat new file mode 100644 index 0000000..b8626c4 --- /dev/null +++ b/libXamine/debian/compat @@ -0,0 +1 @@ +4 diff --git a/libXamine/debian/control b/libXamine/debian/control new file mode 100644 index 0000000..0aa4834 --- /dev/null +++ b/libXamine/debian/control @@ -0,0 +1,36 @@ +Source: xamine +Priority: optional +Maintainer: Josh Triplett +Build-Depends: cdbs, debhelper (>= 4.0.0), libxml2-dev +Standards-Version: 3.6.1 + +Package: libxamine-dev +Section: libdevel +Architecture: any +Depends: libxamine0 (= ${Source-Version}) +Description: X Window System protocol analysis library, development files + Xamine is a protocol analysis library for the X Window System protocol, based + on XML-XCB protocol descriptions. Given a binary X protocol stream, Xamine + can reconstruct the structured tree of requests, replies, events, and errors. + . + Xamine is under heavy development; the functionality and interface are + subject to change. + . + This package contains the header and library files needed to build software + using libXamine. + +Package: libxamine0 +Section: libs +Architecture: any +Depends: ${shlibs:Depends}, ${misc:Depends} +Recommends: fd.o-xcb-proto +Description: X Window System protocol analysis library + Xamine is a protocol analysis library for the X Window System protocol, based + on XML-XCB protocol descriptions. Given a binary X protocol stream, Xamine + can reconstruct the structured tree of requests, replies, events, and errors. + . + Xamine is under heavy development; the functionality and interface are + subject to change. + . + This package contains the library files needed to run software using + libXamine. diff --git a/libXamine/debian/copyright b/libXamine/debian/copyright new file mode 100644 index 0000000..551916e --- /dev/null +++ b/libXamine/debian/copyright @@ -0,0 +1,26 @@ +This package was debianized by Josh Triplett on +Fri, 4 Mar 2005 22:10:19 -0800. + +It was downloaded from FIXME. + +Upstream Author: Josh Triplett + +License: + +/* Xamine - X Protocol Analyzer + * Copyright (C) 2004-2005 Josh Triplett + * + * This package is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This package is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + */ + +On Debian systems, the complete text of the GNU Lesser General Public License +can be found in `/usr/share/common-licenses/LGPL'. + diff --git a/libXamine/debian/libxamine-dev.dirs b/libXamine/debian/libxamine-dev.dirs new file mode 100644 index 0000000..4418816 --- /dev/null +++ b/libXamine/debian/libxamine-dev.dirs @@ -0,0 +1,2 @@ +usr/lib +usr/include diff --git a/libXamine/debian/libxamine-dev.install b/libXamine/debian/libxamine-dev.install new file mode 100644 index 0000000..68a175d --- /dev/null +++ b/libXamine/debian/libxamine-dev.install @@ -0,0 +1,5 @@ +usr/include/* +usr/lib/lib*.a +usr/lib/lib*.so +usr/lib/pkgconfig/* +usr/lib/*.la diff --git a/libXamine/debian/libxamine0.dirs b/libXamine/debian/libxamine0.dirs new file mode 100644 index 0000000..6845771 --- /dev/null +++ b/libXamine/debian/libxamine0.dirs @@ -0,0 +1 @@ +usr/lib diff --git a/libXamine/debian/libxamine0.install b/libXamine/debian/libxamine0.install new file mode 100644 index 0000000..d0dbfd1 --- /dev/null +++ b/libXamine/debian/libxamine0.install @@ -0,0 +1 @@ +usr/lib/lib*.so.* diff --git a/libXamine/debian/rules b/libXamine/debian/rules new file mode 100755 index 0000000..f1e8443 --- /dev/null +++ b/libXamine/debian/rules @@ -0,0 +1,4 @@ +#!/usr/bin/make -f +DEB_DH_INSTALL_SOURCEDIR=debian/tmp +include /usr/share/cdbs/1/rules/debhelper.mk +include /usr/share/cdbs/1/class/autotools.mk diff --git a/libXamine/libXamine.pc.in b/libXamine/libXamine.pc.in new file mode 100644 index 0000000..02b97b4 --- /dev/null +++ b/libXamine/libXamine.pc.in @@ -0,0 +1,10 @@ +prefix=@prefix@ +exec_prefix=@exec_prefix@ +libdir=@libdir@ +includedir=@includedir@ + +Name: libXamine +Description: Library to dissect binary X Window System protocol streams +Version: @PACKAGE_VERSION@ +Libs: -L${libdir} @LIBS@ +Cflags: -I${includedir} diff --git a/libXamine/src/strsplit.c b/libXamine/src/strsplit.c new file mode 100644 index 0000000..c5ea36c --- /dev/null +++ b/libXamine/src/strsplit.c @@ -0,0 +1,96 @@ +/* strsplit.c - Split a string into an array of tokens + * Copyright (C) 2004-2005 Josh Triplett + * + * This package is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This package is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + */ + +#include +#include + +/* strsplit splits the string input into tokens based on the delimiters in + * delim. It returns an array of char*s containing the tokens, ending with a + * NULL char*. If malloc fails, or either input string is NULL, strsplit + * returns NULL. */ +char ** strsplit(const char *input, const char *delim) +{ + /* Rather than allocating a string for each token, strsplit duplicates the + * input string, replaces the delimiters with '\0', and creates an array + * of pointers into this string. */ + + char *str; /* Copy of the input string */ + int len; /* Length of the input string */ + int token_count; /* Number of tokens in the input string */ + int token; /* Current token */ + enum { TOKEN, DELIM } state; /* Type of the previous character */ + char **tokens; /* Array of tokens */ + int i; /* Loop index */ + + if(input == NULL || delim == NULL) + return NULL; + + len = strlen(input); + + /* Duplicate the input string. */ + str = malloc(len + 1); + if(str == NULL) + return NULL; + strcpy(str, input); + + /* Count the number of tokens, and replace the delimiters with '\0'. */ + token_count = 0; + state = DELIM; + for(i = 0; i < len; i++) + { + if(strchr(delim, str[i]) != NULL) + { + str[i] = '\0'; + state = DELIM; + } + else if(state == DELIM) + { + state = TOKEN; + token_count++; + } + } + + /* Allocate the array of tokens. */ + tokens = malloc((token_count+1)*sizeof(char*)); + if(tokens == NULL) + { + free(str); + return NULL; + } + + /* Set each element in tokens to point to the beginning of the + * corresponding token in str. */ + token = 0; + state = DELIM; + for(i = 0; i < len; i++) + { + if(str[i] == '\0') + state = DELIM; + else if(state == DELIM) + { + state = TOKEN; + tokens[token++] = &(str[i]); + } + } + tokens[token_count] = NULL; + + return tokens; +} + +/* strsplit_free frees the array returned by strsplit. */ +void strsplit_free(char **tokens) +{ + free(*tokens); + free(tokens); +} diff --git a/libXamine/src/strsplit.h b/libXamine/src/strsplit.h new file mode 100644 index 0000000..673778f --- /dev/null +++ b/libXamine/src/strsplit.h @@ -0,0 +1,27 @@ +/* strsplit.c - Split a string into an array of tokens + * Copyright (C) 2004-2005 Josh Triplett + * + * This package is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This package is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + */ + +#if !defined(STRSPLIT_H) +#define STRSPLIT_H + +/* strsplit splits the string str into tokens based on the delimiters in + * delim. It returns an array of char*s containing the tokens, ending with a + * NULL char*. If malloc fails, or either input string is NULL, strsplit + * returns NULL. */ +char ** strsplit(const char *str, const char *delim); + +/* strsplit_free frees the array returned by strsplit. */ +void strsplit_free(char **tokens); + +#endif /* !defined(STRSPLIT_H) */ diff --git a/libXamine/src/xamine.c b/libXamine/src/xamine.c new file mode 100644 index 0000000..806fade --- /dev/null +++ b/libXamine/src/xamine.c @@ -0,0 +1,728 @@ +/* Xamine - X Protocol Analyzer + * Copyright (C) 2004-2005 Josh Triplett + * + * This package is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This package is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + */ +#include +#include +#include +#include +#include +#include "strsplit.h" +#include "xamine.h" + +const char *XAMINE_PATH_DEFAULT = "/usr/include/X11/XCB:" + "/usr/include/X11/XCB/extensions"; +const char *XAMINE_PATH_DELIM = ":"; +const char *XAMINE_PATH_GLOB = "/*.xml"; + +/* Concrete definitions for opaque and private structure types. */ +typedef struct XamineEvent +{ + unsigned char number; + XamineDefinition *definition; + struct XamineEvent *next; +} XamineEvent; + +typedef struct XamineError +{ + unsigned char number; + XamineDefinition *definition; + struct XamineError *next; +} XamineError; + +typedef struct XamineExtension +{ + char *name; + char *xname; + XamineEvent *events; + XamineError *errors; + struct XamineExtension *next; +} XamineExtension; + +struct XamineState +{ + unsigned char host_is_le; + XamineDefinition *definitions; + XamineDefinition *core_events[64]; /* Core events 2-63 (0-1 unused) */ + XamineDefinition *core_errors[128]; /* Core errors 0-127 */ + XamineExtension *extensions; +}; + +struct XamineConversation +{ + XamineState *state; + unsigned char is_le; + XamineDefinition *extension_events[64]; /* Extension events 64-127 */ + XamineDefinition *extension_errors[128]; /* Extension errors 128-255 */ + XamineExtension *extensions[128]; /* Extensions 128-255 */ +}; + +static const XamineDefinition core_type_definitions[] = +{ + { "char", XAMINE_CHAR, 1 }, + { "BOOL", XAMINE_BOOLEAN, 1 }, + { "BYTE", XAMINE_UNSIGNED, 1 }, + { "CARD8", XAMINE_UNSIGNED, 1 }, + { "CARD16", XAMINE_UNSIGNED, 2 }, + { "CARD32", XAMINE_UNSIGNED, 4 }, + { "INT8", XAMINE_SIGNED, 1 }, + { "INT16", XAMINE_SIGNED, 2 }, + { "INT32", XAMINE_SIGNED, 4 } +}; + +static void xamine_parse_xmlxcb_file(XamineState *state, char *filename); +static char* xamine_make_name(XamineExtension *extension, char *name); +static XamineDefinition *xamine_find_type(XamineState *state, char *name); +static xmlNode *xamine_xml_next_elem(xmlNode *elem); +static XamineFieldDefinition *xamine_parse_fields(XamineState *state, + xmlNode *elem); +static XamineExpression *xamine_parse_expression(XamineState *state, + xmlNode *elem); +static XaminedItem *xamine_definition(XamineConversation *conversation, + void **data, unsigned int *size, + unsigned int *offset, + XamineDefinition *definition, + XaminedItem *parent); +static XaminedItem *xamine_field_definition(XamineConversation *conversation, + void **data, unsigned int *size, + unsigned int *offset, + XamineFieldDefinition *definition, + XaminedItem *parent); + +/* Initialization and cleanup */ +XamineState *xamine_init() +{ + int i; + const char *xamine_path_env; + char **xamine_path; + char **iter; + glob_t xml_files; + XamineState *state = calloc(1, sizeof(XamineState)); + + if(!state) + return NULL; + + { + unsigned long l = 1; + state->host_is_le = *(unsigned char*)&l; + } + + /* Add definitions of core types. */ + for(i = 0; i < sizeof(core_type_definitions)/sizeof(XamineDefinition); i++) + { + XamineDefinition *temp = calloc(1, sizeof(XamineDefinition)); + if(!temp) + { + xamine_cleanup(state); + return NULL; + } + + *temp = core_type_definitions[i]; + + temp->next = state->definitions; + state->definitions = temp; + + temp->name = strdup(core_type_definitions[i].name); + if(!temp->name) + { + xamine_cleanup(state); + return NULL; + } + } + + /* Set up the search path for XML-XCB descriptions. */ + xamine_path_env = getenv("XAMINE_PATH"); + if(!xamine_path_env) + xamine_path_env = XAMINE_PATH_DEFAULT; + xamine_path = strsplit(xamine_path_env, XAMINE_PATH_DELIM); + if(!xamine_path) + { + xamine_cleanup(state); + return NULL; + } + + /* Find all the XML files on the search path. */ + xml_files.gl_pathv = NULL; + for(iter = xamine_path; *iter; iter++) + { + char *pattern = malloc(1+strlen(*iter)+strlen(XAMINE_PATH_GLOB)); + if(!pattern) + { + if(xml_files.gl_pathv) + globfree(&xml_files); + strsplit_free(xamine_path); + xamine_cleanup(state); + return NULL; + } + + strcpy(pattern, *iter); + strcat(pattern, XAMINE_PATH_GLOB); + + glob(pattern, (xml_files.gl_pathv ? GLOB_APPEND : 0), NULL, + &xml_files); + } + + strsplit_free(xamine_path); + + /* Parse the XML files. */ + if(xml_files.gl_pathv) + { + for(iter = xml_files.gl_pathv; *iter; iter++) + xamine_parse_xmlxcb_file(state, *iter); + } + + globfree(&xml_files); + + return state; +} + +void xamine_cleanup(XamineState *state) +{ + XamineDefinition *temp; + while(state->definitions) + { + temp = state->definitions; + state->definitions = state->definitions->next; + free(temp); + } + /* FIXME: incomplete */ +} + +/* Retrieval of the type definitions. */ +XamineDefinition *xamine_get_definitions(XamineState *state) +{ + if(state == NULL) + return NULL; + + return state->definitions; +} + +/* Creation and destruction of conversations. */ +XamineConversation *xamine_create_conversation(XamineState *state) +{ + XamineConversation *conversation = calloc(1, sizeof(XamineConversation)); + if(conversation == NULL) + return NULL; + conversation->state = state; + /* FIXME */ + conversation->is_le = state->host_is_le; + return conversation; +} + +void xamine_free_conversation(XamineConversation *conversation) +{ + free(conversation); +} + +/* Analysis */ +XaminedItem *xamine(XamineConversation *conversation, XamineDirection dir, + void *data, unsigned int size) +{ + XamineDefinition *definition = NULL; + + if(dir == XAMINE_REQUEST) + { + /* Request layout: + * 1-byte major opcode + * 1 byte of request-specific data + * 2-byte length (0 if big request) + * If 2-byte length is zero, 4-byte length. + * Rest of request-specific data + */ + return NULL; /* Not yet implemented. */ + } + else if(dir == XAMINE_RESPONSE) + { + unsigned char response_type; + + if(size < 32) + return NULL; + + response_type = *(unsigned char *)data; + if(response_type == 0) /* Error */ + { + unsigned char error_code = *(unsigned char*)(data+1); + if(error_code < 128) + definition = conversation->state->core_errors[error_code]; + else + definition = conversation->extension_errors[error_code-128]; + } + else if(response_type == 1) /* Reply */ + return NULL; /* Not yet implemented. */ + else /* Event */ + { + /* Turn off SendEvent flag before looking up by event number. */ + unsigned char event_code = response_type & ~0x80; + if(event_code < 64) + definition = conversation->state->core_events[event_code]; + else + definition = conversation->extension_events[event_code-64]; + } + } + + if(definition == NULL) + return NULL; + + /* Dissect the data based on the definition. */ + int offset = 0; + return xamine_definition(conversation, &data, &size, &offset, + definition, NULL); +} + +void xamine_free(XaminedItem *item) +{ + if(item) + { + xamine_free(item->child); + xamine_free(item->next); + free(item); + } +} + +/********** Private functions **********/ + +static void xamine_parse_xmlxcb_file(XamineState *state, char *filename) +{ + xmlDoc *doc; + xmlNode *root, *elem; + char *extension_xname; + XamineExtension *extension = NULL; + + /* FIXME: Remove this. */ + printf("DEBUG: Parsing file \"%s\"\n", filename); + + /* Ignore text nodes consisting entirely of whitespace. */ + xmlKeepBlanksDefault(0); + + doc = xmlParseFile(filename); + if(!doc) + return; + + root = xmlDocGetRootElement(doc); + if(!root) + return; + + extension_xname = xmlGetProp(root, "extension-xname"); + + if(extension_xname) + { + /* FIXME: Remove this. */ + printf("Extension: %s\n", extension_xname); + + for(extension = state->extensions; + extension != NULL; + extension = extension->next) + { + if(strcmp(extension->xname, extension_xname) == 0) + break; + } + + if(extension == NULL) + { + extension = calloc(1, sizeof(XamineExtension)); + extension->name = strdup(xmlGetProp(root, "extension-name")); + extension->xname = strdup(extension_xname); + extension->next = state->extensions; + state->extensions = extension; + } + } + else /* FIXME: Remove this. */ + printf("Core Protocol\n"); + + for(elem = root->children; elem != NULL; + elem = xamine_xml_next_elem(elem->next)) + { + /* FIXME: Remove this */ + { + char *name = xmlGetProp(elem, "name"); + printf("DEBUG: Parsing element \"%s\", name=\"%s\"\n", + elem->name, name ? name : ""); + } + + if(strcmp(elem->name, "request") == 0) + { + /* Not yet implemented. */ + } + else if(strcmp(elem->name, "event") == 0) + { + char *no_sequence_number; + XamineDefinition *def; + XamineFieldDefinition *fields; + int number = atoi(xmlGetProp(elem, "number")); + if(number > 64) + continue; + def = calloc(1, sizeof(XamineDefinition)); + def->name = xamine_make_name(extension, xmlGetProp(elem, "name")); + def->type = XAMINE_STRUCT; + + fields = xamine_parse_fields(state, elem); + if(fields == NULL) + { + fields = calloc(1, sizeof(XamineFieldDefinition)); + fields->name = strdup("pad"); + fields->definition = xamine_find_type(state, "CARD8"); + } + def->fields = calloc(1, sizeof(XamineFieldDefinition)); + def->fields->name = strdup("response_type"); + def->fields->definition = xamine_find_type(state, "BYTE"); + def->fields->next = fields; + fields = fields->next; + no_sequence_number = xmlGetProp(elem, "no-sequence-number"); + if(no_sequence_number && strcmp(no_sequence_number, "true") == 0) + { + def->fields->next->next = fields; + } + else + { + def->fields->next->next = + calloc(1, sizeof(XamineFieldDefinition)); + def->fields->next->next->name = strdup("sequence"); + def->fields->next->next->definition = + xamine_find_type(state, "CARD16"); + def->fields->next->next->next = fields; + } + def->next = state->definitions; + state->definitions = def; + + if(extension) + { + XamineEvent *event = calloc(1, sizeof(XamineEvent)); + event->number = number; + event->definition = def; + event->next = extension->events; + } + else + state->core_events[number] = def; + } + else if(strcmp(elem->name, "eventcopy") == 0) + { + XamineDefinition *def; + int number = atoi(xmlGetProp(elem, "number")); + if(number > 64) + continue; + def = calloc(1, sizeof(XamineDefinition)); + def->name = strdup(xmlGetProp(elem, "name")); + def->type = XAMINE_TYPEDEF; + def->ref = xamine_find_type(state, xmlGetProp(elem, "ref")); + + if(extension) + { + XamineEvent *event = calloc(1, sizeof(XamineEvent)); + event->number = number; + event->definition = def; + event->next = extension->events; + } + else + state->core_events[number] = def; + } + else if(strcmp(elem->name, "error") == 0) + { + } + else if(strcmp(elem->name, "errorcopy") == 0) + { + } + else if(strcmp(elem->name, "struct") == 0) + { + XamineDefinition *def = calloc(1, sizeof(XamineDefinition)); + def->name = xamine_make_name(extension, xmlGetProp(elem, "name")); + def->type = XAMINE_STRUCT; + def->fields = xamine_parse_fields(state, elem); + def->next = state->definitions; + state->definitions = def; + } + else if(strcmp(elem->name, "union") == 0) + { + } + else if(strcmp(elem->name, "xidtype") == 0) + { + XamineDefinition *def = calloc(1, sizeof(XamineDefinition)); + def->name = xamine_make_name(extension, xmlGetProp(elem, "name")); + def->type = XAMINE_UNSIGNED; + def->size = 4; + def->next = state->definitions; + state->definitions = def; + } + else if(strcmp(elem->name, "enum") == 0) + { + } + else if(strcmp(elem->name, "typedef") == 0) + { + XamineDefinition *def = calloc(1, sizeof(XamineDefinition)); + def->name = xamine_make_name(extension, + xmlGetProp(elem, "newname")); + def->type = XAMINE_TYPEDEF; + def->ref = xamine_find_type(state, xmlGetProp(elem, "oldname")); + def->next = state->definitions; + state->definitions = def; + } + else if(strcmp(elem->name, "import") == 0) + { + } + } +} + +static char* xamine_make_name(XamineExtension *extension, char *name) +{ + if(extension) + { + char *temp = malloc(strlen(extension->name) + strlen(name) + 1); + if(temp == NULL) + return NULL; + strcpy(temp, extension->name); + strcat(temp, name); + return temp; + } + else + return strdup(name); +} + +static XamineDefinition *xamine_find_type(XamineState *state, char *name) +{ + XamineDefinition *def; + for(def = state->definitions; def != NULL; def = def->next) + { + /* FIXME: does not work for extension types. */ + if(strcmp(def->name, name) == 0) + return def; + } + return NULL; +} + +static xmlNode *xamine_xml_next_elem(xmlNode *elem) +{ + while(elem && elem->type != XML_ELEMENT_NODE) + elem = elem->next; + return elem; +} + +static XamineFieldDefinition *xamine_parse_fields(XamineState *state, + xmlNode *elem) +{ + xmlNode *cur; + XamineFieldDefinition *head; + XamineFieldDefinition **tail = &head; + for(cur = elem->children; cur!=NULL; cur = xamine_xml_next_elem(cur->next)) + { + /* FIXME: handle elements other than "field", "pad", and "list". */ + *tail = calloc(1, sizeof(XamineFieldDefinition)); + if(strcmp(cur->name, "pad") == 0) + { + (*tail)->name = "pad"; + (*tail)->definition = xamine_find_type(state, "CARD8"); + (*tail)->length = calloc(1, sizeof(XamineExpression)); + (*tail)->length->type = XAMINE_VALUE; + (*tail)->length->value = atoi(xmlGetProp(cur, "bytes")); + } + else + { + (*tail)->name = strdup(xmlGetProp(cur, "name")); + (*tail)->definition = xamine_find_type(state, + xmlGetProp(cur, "type")); + /* FIXME: handle missing length expressions. */ + if(strcmp(cur->name, "list") == 0) + (*tail)->length = xamine_parse_expression(state, + cur->children); + } + tail = &((*tail)->next); + } + + *tail = NULL; + return head; +} + +static XamineExpression *xamine_parse_expression(XamineState *state, + xmlNode *elem) +{ + XamineExpression *e = calloc(1, sizeof(XamineExpression)); + elem = xamine_xml_next_elem(elem); + if(strcmp(elem->name, "op") == 0) + { + char *temp = xmlGetProp(elem, "op"); + e->type = XAMINE_OP; + if(strcmp(temp, "+") == 0) + e->op = XAMINE_ADD; + else if(strcmp(temp, "-") == 0) + e->op = XAMINE_SUBTRACT; + else if(strcmp(temp, "*") == 0) + e->op = XAMINE_MULTIPLY; + else if(strcmp(temp, "/") == 0) + e->op = XAMINE_DIVIDE; + else if(strcmp(temp, "<<") == 0) + e->op = XAMINE_LEFT_SHIFT; + else if(strcmp(temp, "&") == 0) + e->op = XAMINE_BITWISE_AND; + elem = xamine_xml_next_elem(elem->children); + e->left = xamine_parse_expression(state, elem); + elem = xamine_xml_next_elem(elem->next); + e->right = xamine_parse_expression(state, elem); + } + else if(strcmp(elem->name, "value") == 0) + { + e->type = XAMINE_VALUE; + e->value = strtol(elem->children->content, NULL, 0); + } + else if(strcmp(elem->name, "fieldref") == 0) + { + e->type = XAMINE_FIELDREF; + e->field = strdup(elem->children->content); + } + return e; +} + +static long xamine_evaluate_expression(XamineExpression *expression, + XaminedItem *parent) +{ + switch(expression->type) + { + case XAMINE_VALUE: + return expression->value; + + case XAMINE_FIELDREF: + { + XaminedItem *cur; + for(cur = parent->child; cur != NULL; cur = cur->next) + if(strcmp(cur->name, expression->field) == 0) + switch(cur->definition->type) + { + case XAMINE_BOOLEAN: return cur->bool_value; + case XAMINE_CHAR: return cur->char_value; + case XAMINE_SIGNED: return cur->signed_value; + case XAMINE_UNSIGNED: return cur->unsigned_value; + } + /* FIXME: handle not found or wrong type */ + } + + case XAMINE_OP: + { + long left = xamine_evaluate_expression(expression->left, parent); + long right = xamine_evaluate_expression(expression->right, parent); + switch(expression->op) + { + case XAMINE_ADD: return left+right; + case XAMINE_SUBTRACT: return left-right; + case XAMINE_MULTIPLY: return left*right; + case XAMINE_DIVIDE: return left/right; /* FIXME: divide by zero */ + case XAMINE_LEFT_SHIFT: return left<type == XAMINE_TYPEDEF) + { + xamined = xamine_definition(conversation, data, size, offset, + definition->ref, parent); + xamined->definition = definition; + return xamined; + } + + xamined = calloc(1, sizeof(XaminedItem)); + xamined->definition = definition; + if(definition->type == XAMINE_STRUCT) + { + XaminedItem **end = &(xamined->child); + XamineFieldDefinition *child; + for(child = definition->fields; child != NULL; child = child->next) + { + *end = xamine_field_definition(conversation, data, size, offset, + child, xamined); + end = &((*end)->next); + } + *end = NULL; + } + else + { + switch(definition->type) + { + case XAMINE_BOOLEAN: + /* FIXME: field->definition->size must be 1 */ + xamined->bool_value = *(unsigned char*)(*data) ? 1 : 0; + break; + + case XAMINE_CHAR: + /* FIXME: field->definition->size must be 1 */ + xamined->char_value = *(char *)(*data); + break; + + case XAMINE_SIGNED: + case XAMINE_UNSIGNED: + { + unsigned char *dest = definition->type == XAMINE_SIGNED + ? (unsigned char *)&(xamined->signed_value) + : (unsigned char *)&(xamined->unsigned_value); + unsigned char *src = (unsigned char*)(*data); + if(definition->size == 1 + || conversation->is_le == conversation->state->host_is_le) + memcpy(dest, src, definition->size); + else + { + int i; + dest += definition->size-1; + for(i = 0; i < definition->size; i++) + *dest-- = *src++; + } + } + } + *data += definition->size; + *size -= definition->size; + *offset += definition->size; + } + + return xamined; +} + +static XaminedItem *xamine_field_definition(XamineConversation *conversation, + void **data, unsigned int *size, + unsigned int *offset, + XamineFieldDefinition *field, + XaminedItem *parent) +{ + XaminedItem *xamined; + + if(field->length) + { + xamined = calloc(1, sizeof(XaminedItem)); + xamined->name = field->name; + xamined->definition = field->definition; + xamined->offset = *offset; + XaminedItem **end = &(xamined->child); + unsigned long length = xamine_evaluate_expression(field->length, + parent); + unsigned long i; + for(i = 0; i < length; i++) + { + *end = xamine_definition(conversation, data, size, offset, + field->definition, parent); + (*end)->name = malloc(23); /* '[', length of 2**64, ']', '\0' */ + sprintf((*end)->name, "[%lu]", i); + end = &((*end)->next); + } + *end = NULL; + } + else + { + xamined = xamine_definition(conversation, data, size, offset, + field->definition, parent); + xamined->name = field->name; + } + + return xamined; +} diff --git a/libXamine/src/xamine.h b/libXamine/src/xamine.h new file mode 100644 index 0000000..8dea739 --- /dev/null +++ b/libXamine/src/xamine.h @@ -0,0 +1,126 @@ +/* Xamine - X Protocol Analyzer + * Copyright (C) 2004-2005 Josh Triplett + * + * This package is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + * + * This package is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + */ +#ifndef XAMINE_H +#define XAMINE_H + +typedef enum +{ + XAMINE_BOOLEAN, + XAMINE_CHAR, + XAMINE_SIGNED, + XAMINE_UNSIGNED, + XAMINE_STRUCT, + XAMINE_UNION, + XAMINE_TYPEDEF +} XamineType; + +typedef enum +{ + XAMINE_REQUEST, + XAMINE_RESPONSE +} XamineDirection; + +typedef struct XamineDefinition +{ + char *name; + XamineType type; + union + { + unsigned int size; /* base types */ + struct XamineFieldDefinition *fields; /* struct, union */ + struct XamineDefinition *ref; /* typedef */ + }; + struct XamineDefinition *next; +} XamineDefinition; + +typedef enum XamineExpressionType +{ + XAMINE_FIELDREF, + XAMINE_VALUE, + XAMINE_OP +} XamineExpressionType; + +typedef enum XamineOp +{ + XAMINE_ADD, + XAMINE_SUBTRACT, + XAMINE_MULTIPLY, + XAMINE_DIVIDE, + XAMINE_LEFT_SHIFT, + XAMINE_BITWISE_AND +} XamineOp; + +typedef struct XamineExpression +{ + XamineExpressionType type; + union + { + char *field; /* Field name for XAMINE_FIELDREF */ + unsigned long value; /* Value for XAMINE_VALUE */ + struct /* Operator and operands for XAMINE_OP */ + { + XamineOp op; + struct XamineExpression *left; + struct XamineExpression *right; + }; + }; +} XamineExpression; + +typedef struct XamineFieldDefinition +{ + char *name; + XamineDefinition *definition; + XamineExpression *length; /* List length; NULL for non-list */ + struct XamineFieldDefinition *next; +} XamineFieldDefinition; + +typedef struct XaminedItem +{ + char *name; + XamineDefinition *definition; + unsigned int offset; + union + { + unsigned char bool_value; + char char_value; + signed long signed_value; + unsigned long unsigned_value; + }; + struct XaminedItem *child; + struct XaminedItem *next; +} XaminedItem; + +/* Opaque types for an Xamine library state and a conversation-specific + * state. */ +typedef struct XamineState XamineState; +typedef struct XamineConversation XamineConversation; + +/* Initialization and cleanup */ +extern XamineState * xamine_init(); +extern void xamine_cleanup(XamineState *state); + +/* Retrieval of the type definitions. */ +extern XamineDefinition * xamine_get_definitions(XamineState *state); + +/* Creation and destruction of conversations. */ +extern XamineConversation * xamine_create_conversation(XamineState *state); +extern void xamine_free_conversation(XamineConversation *conversation); + +/* Analysis */ +extern XaminedItem * xamine(XamineConversation *conversation, + XamineDirection dir, + void *data, unsigned int size); +extern void xamine_free(XaminedItem *item); + +#endif /* XAMINE_H */ -- cgit v1.2.3