converter-sample renamed into converter-example
diff --git a/skeletons/converter-example.c b/skeletons/converter-example.c
new file mode 100644
index 0000000..a1dc8f4
--- /dev/null
+++ b/skeletons/converter-example.c
@@ -0,0 +1,937 @@
+/*
+ * Generic converter template for a selected ASN.1 type.
+ * Copyright (c) 2005-2017 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ *
+ * To compile with your own ASN.1 type, redefine the PDU as shown:
+ *
+ * cc -DPDU=MyCustomType -o myDecoder.o -c converter-example.c
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <sys/types.h>
+#include <stdlib.h> /* for atoi(3) */
+#include <unistd.h> /* for getopt(3) */
+#include <string.h> /* for strerror(3) */
+#include <sysexits.h> /* for EX_* exit codes */
+#include <errno.h> /* for errno */
+
+#include <asn_application.h>
+#include <asn_internal.h> /* for ASN__DEFAULT_STACK_MAX */
+
+/* Convert "Type" defined by -DPDU into "asn_DEF_Type" */
+
+#ifndef NO_ASN_PDU
+#ifndef PDU
+#error Define -DPDU to compile this sample converter.
+#endif
+#ifdef ASN_PDU_COLLECTION /* Generated by asn1c: -pdu=... */
+extern asn_TYPE_descriptor_t *asn_pdu_collection[];
+#endif
+#define ASN_DEF_PDU(t) asn_DEF_ ## t
+#define DEF_PDU_Type(t) ASN_DEF_PDU(t)
+#define PDU_Type DEF_PDU_Type(PDU)
+
+extern asn_TYPE_descriptor_t PDU_Type; /* ASN.1 type to be decoded */
+#define PDU_Type_Ptr (&PDU_Type)
+#else /* NO_ASN_PDU */
+#define PDU_Type_Ptr NULL
+#endif /* NO_ASN_PDU */
+
+/*
+ * Open file and parse its contens.
+ */
+static void *data_decode_from_file(enum asn_transfer_syntax,
+ asn_TYPE_descriptor_t *asnTypeOfPDU,
+ FILE *file, const char *name,
+ ssize_t suggested_bufsize, int first_pdu);
+static int write_out(const void *buffer, size_t size, void *key);
+static FILE *argument_to_file(char *av[], int idx);
+static char *argument_to_name(char *av[], int idx);
+
+ int opt_debug; /* -d (or -dd) */
+static int opt_check; /* -c (constraints checking) */
+static int opt_stack; /* -s (maximum stack size) */
+static int opt_nopad; /* -per-nopad (PER input is not padded between msgs) */
+static int opt_onepdu; /* -1 (decode single PDU) */
+
+#ifdef JUNKTEST /* Enable -J <probability> */
+#define JUNKOPT "J:"
+static double opt_jprob; /* Junk bit probability */
+static int junk_failures;
+static void junk_bytes_with_probability(uint8_t *, size_t, double prob);
+#else
+#define JUNKOPT
+#endif
+
+/* Debug output function */
+static void
+DEBUG(const char *fmt, ...) {
+ va_list ap;
+ if(!opt_debug) return;
+ fprintf(stderr, "AD: ");
+ va_start(ap, fmt);
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+ fprintf(stderr, "\n");
+}
+
+static const char *
+ats_simple_name(enum asn_transfer_syntax syntax) {
+ switch(syntax) {
+ case ATS_INVALID:
+ return "/dev/null";
+ case ATS_NONSTANDARD_PLAINTEXT:
+ return "plaintext";
+ case ATS_BER:
+ return "BER";
+ case ATS_DER:
+ return "DER";
+ case ATS_CER:
+ return "CER";
+ case ATS_BASIC_OER:
+ case ATS_CANONICAL_OER:
+ return "OER";
+ case ATS_BASIC_XER:
+ case ATS_CANONICAL_XER:
+ return "XER";
+ case ATS_UNALIGNED_BASIC_PER:
+ case ATS_UNALIGNED_CANONICAL_PER:
+ return "PER";
+ default:
+ return "<?>";
+ }
+}
+
+#define CODEC_OFFSET(fname) ((ptrdiff_t)&(((asn_TYPE_operation_t *)0)->fname))
+typedef struct {
+ const char *name;
+ enum asn_transfer_syntax syntax;
+ ptrdiff_t codec_offset;
+ const char *full_name;
+} syntax_selector;
+
+static syntax_selector input_encodings[] = {
+ {"ber", ATS_BER, CODEC_OFFSET(ber_decoder),
+ "Input is in BER (Basic Encoding Rules) or DER"},
+ {"oer", ATS_BASIC_OER, CODEC_OFFSET(oer_decoder),
+ "Input is in OER (Octet Encoding Rules)"},
+ {"per", ATS_UNALIGNED_BASIC_PER, CODEC_OFFSET(uper_decoder),
+ "Input is in Unaligned PER (Packed Encoding Rules)"},
+ {"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_decoder),
+ "Input is in XER (XML Encoding Rules)"},
+ {0, ATS_INVALID, 0, 0}};
+
+static syntax_selector output_encodings[] = {
+ {"der", ATS_DER, CODEC_OFFSET(der_encoder),
+ "Output as DER (Distinguished Encoding Rules)"},
+ {"oer", ATS_CANONICAL_OER, CODEC_OFFSET(oer_encoder),
+ "Output as Canonical OER (Octet Encoding Rules)"},
+ {"per", ATS_UNALIGNED_CANONICAL_PER, CODEC_OFFSET(uper_encoder),
+ "Output as Unaligned PER (Packed Encoding Rules)"},
+ {"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_encoder),
+ "Output as XER (XML Encoding Rules)"},
+ {"text", ATS_NONSTANDARD_PLAINTEXT, CODEC_OFFSET(print_struct),
+ "Output as plain semi-structured text"},
+ {"null", ATS_INVALID, CODEC_OFFSET(print_struct),
+ "Verify (decode) input, but do not output"},
+ {0, ATS_INVALID, 0, 0}};
+
+static int
+has_codec_defined(const asn_TYPE_descriptor_t *td,
+ const syntax_selector *element) {
+ return *(const void *const *)(const void *)((const char *)td->op
+ + element->codec_offset) != 0;
+}
+
+/*
+ * Select ASN.1 Transfer Enocoding Syntax by command line name.
+ */
+static const syntax_selector *
+ats_by_name(const char *name, const asn_TYPE_descriptor_t *td,
+ const syntax_selector *first_element) {
+ const syntax_selector *element;
+ for(element = first_element; element->name; element++) {
+ if(strcmp(element->name, name) == 0) {
+ if(td && td->op && has_codec_defined(td, element)) {
+ return element;
+ }
+ }
+ }
+ return NULL;
+}
+
+int
+main(int ac, char *av[]) {
+ FILE *binary_out;
+ static asn_TYPE_descriptor_t *pduType = PDU_Type_Ptr;
+ ssize_t suggested_bufsize = 8192; /* close or equal to stdio buffer */
+ int number_of_iterations = 1;
+ int num;
+ int ch;
+ const syntax_selector *sel;
+ enum asn_transfer_syntax isyntax = ATS_INVALID;
+ enum asn_transfer_syntax osyntax = ATS_BASIC_XER;
+
+#ifndef PDU
+ if(!pduType) {
+ fprintf(stderr, "No -DPDU defined during compilation.\n");
+#ifdef NO_ASN_PDU
+ exit(0);
+#else
+ exit(EX_SOFTWARE);
+#endif
+ }
+#endif
+
+ /* Figure out if specialty decoder needs to be default */
+ if(ats_by_name("oer", pduType, input_encodings))
+ isyntax = ATS_BASIC_OER;
+ if(ats_by_name("per", pduType, input_encodings))
+ isyntax = ATS_UNALIGNED_BASIC_PER;
+
+ /*
+ * Pocess the command-line argments.
+ */
+ while((ch = getopt(ac, av, "i:o:1b:cdn:p:hs:" JUNKOPT)) != -1)
+ switch(ch) {
+ case 'i':
+ sel = ats_by_name(optarg, pduType, input_encodings);
+ if(sel) {
+ isyntax = sel->syntax;
+ } else {
+ fprintf(stderr, "-i<format>: '%s': improper format selector\n",
+ optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+ case 'o':
+ sel = ats_by_name(optarg, pduType, output_encodings);
+ if(sel) {
+ osyntax = sel->syntax;
+ } else {
+ fprintf(stderr, "-o<format>: '%s': improper format selector\n",
+ optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+ case '1':
+ opt_onepdu = 1;
+ break;
+ case 'b':
+ suggested_bufsize = atoi(optarg);
+ if(suggested_bufsize < 1
+ || suggested_bufsize > 16 * 1024 * 1024) {
+ fprintf(stderr,
+ "-b %s: Improper buffer size (1..16M)\n",
+ optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+ case 'c':
+ opt_check = 1;
+ break;
+ case 'd':
+ opt_debug++; /* Double -dd means ASN.1 debug */
+ break;
+ case 'n':
+ number_of_iterations = atoi(optarg);
+ if(number_of_iterations < 1) {
+ fprintf(stderr,
+ "-n %s: Improper iterations count\n", optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+ case 'p':
+ if(strcmp(optarg, "er-nopad") == 0) {
+ opt_nopad = 1;
+ break;
+ }
+#ifdef ASN_PDU_COLLECTION
+ if(strcmp(optarg, "list") == 0) {
+ asn_TYPE_descriptor_t **pdu = asn_pdu_collection;
+ fprintf(stderr, "Available PDU types:\n");
+ for(; *pdu; pdu++) printf("%s\n", (*pdu)->name);
+ exit(0);
+ } else if(optarg[0] >= 'A' && optarg[0] <= 'Z') {
+ asn_TYPE_descriptor_t **pdu = asn_pdu_collection;
+ while(*pdu && strcmp((*pdu)->name, optarg)) pdu++;
+ if(*pdu) { pduType = *pdu; break; }
+ fprintf(stderr, "-p %s: Unrecognized PDU\n", optarg);
+ exit(EX_USAGE);
+ }
+#else /* Without -pdu=auto there's just a single type */
+ if(strcmp(optarg, "list") == 0) {
+ fprintf(stderr, "Available PDU types:\n");
+ printf("%s\n", pduType->name);
+ exit(0);
+ } else if(optarg[0] >= 'A' && optarg[0] <= 'Z') {
+ if(strcmp(optarg, pduType->name) == 0) {
+ break;
+ }
+ fprintf(stderr, "-p %s: Unrecognized PDU\n", optarg);
+ exit(EX_USAGE);
+ }
+#endif /* ASN_PDU_COLLECTION */
+ fprintf(stderr, "-p %s: Unrecognized option\n", optarg);
+ exit(EX_UNAVAILABLE);
+ case 's':
+ opt_stack = atoi(optarg);
+ if(opt_stack < 0) {
+ fprintf(stderr,
+ "-s %s: Non-negative value expected\n",
+ optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+#ifdef JUNKTEST
+ case 'J':
+ opt_jprob = strtod(optarg, 0);
+ if(opt_jprob <= 0.0 || opt_jprob > 1.0) {
+ fprintf(stderr,
+ "-J %s: Probability range 0..1 expected \n",
+ optarg);
+ exit(EX_UNAVAILABLE);
+ }
+ break;
+#endif /* JUNKTEST */
+ case 'h':
+ default:
+#ifdef ASN_CONVERTER_TITLE
+#define _AXS(x) #x
+#define _ASX(x) _AXS(x)
+ fprintf(stderr, "%s\n", _ASX(ASN_CONVERTER_TITLE));
+#endif
+ fprintf(stderr, "Usage: %s [options] <datafile> ...\n", av[0]);
+ fprintf(stderr, "Where options are:\n");
+ for(sel = input_encodings; sel->name; sel++) {
+ if(ats_by_name(sel->name, pduType, sel)) {
+ fprintf(stderr, " -i%s %s%s\n", sel->name,
+ sel->full_name,
+ (sel->syntax == isyntax) ? " (DEFAULT)" : "");
+ }
+ }
+ for(sel = output_encodings; sel->name; sel++) {
+ if(ats_by_name(sel->name, pduType, sel)) {
+ fprintf(stderr, " -o%s%s %s%s\n", sel->name,
+ strlen(sel->name) > 3 ? "" : " ",
+ sel->full_name,
+ (sel->syntax == osyntax) ? " (DEFAULT)" : "");
+ }
+ }
+ if(pduType->op->uper_decoder) {
+ fprintf(stderr,
+ " -per-nopad Assume PER PDUs are not padded (-iper)\n");
+ }
+#ifdef ASN_PDU_COLLECTION
+ fprintf(stderr,
+ " -p <PDU> Specify PDU type to decode\n"
+ " -p list List available PDUs\n");
+#endif /* ASN_PDU_COLLECTION */
+ fprintf(stderr,
+ " -1 Decode only the first PDU in file\n"
+ " -b <size> Set the i/o buffer size (default is %ld)\n"
+ " -c Check ASN.1 constraints after decoding\n"
+ " -d Enable debugging (-dd is even better)\n"
+ " -n <num> Process files <num> times\n"
+ " -s <size> Set the stack usage limit (default is %d)\n"
+#ifdef JUNKTEST
+ " -J <prob> Set random junk test bit garbaging probability\n"
+#endif
+ , (long)suggested_bufsize, ASN__DEFAULT_STACK_MAX);
+ exit(EX_USAGE);
+ }
+
+ ac -= optind;
+ av += optind;
+
+ if(ac < 1) {
+ fprintf(stderr, "%s: No input files specified. "
+ "Try '-h' for more information\n",
+ av[-optind]);
+ exit(EX_USAGE);
+ }
+
+ if(isatty(1)) {
+ const int is_text_output = osyntax == ATS_NONSTANDARD_PLAINTEXT
+ || osyntax == ATS_BASIC_XER
+ || osyntax == ATS_CANONICAL_XER;
+ if(is_text_output) {
+ binary_out = stdout;
+ } else {
+ fprintf(stderr, "(Suppressing binary output to a terminal.)\n");
+ binary_out = fopen("/dev/null", "wb");
+ if(!binary_out) {
+ fprintf(stderr, "Can't open /dev/null: %s\n", strerror(errno));
+ exit(EX_OSERR);
+ }
+ }
+ } else {
+ binary_out = stdout;
+ }
+ setvbuf(stdout, 0, _IOLBF, 0);
+
+ for(num = 0; num < number_of_iterations; num++) {
+ int ac_i;
+ /*
+ * Process all files in turn.
+ */
+ for(ac_i = 0; ac_i < ac; ac_i++) {
+ asn_enc_rval_t erv;
+ void *structure; /* Decoded structure */
+ FILE *file = argument_to_file(av, ac_i);
+ char *name = argument_to_name(av, ac_i);
+ int first_pdu;
+
+ for(first_pdu = 1; (first_pdu || !opt_onepdu); first_pdu = 0) {
+ /*
+ * Decode the encoded structure from file.
+ */
+ structure = data_decode_from_file(isyntax, pduType, file, name,
+ suggested_bufsize, first_pdu);
+ if(!structure) {
+ if(errno) {
+ /* Error message is already printed */
+ exit(EX_DATAERR);
+ } else {
+ /* EOF */
+ break;
+ }
+ }
+
+ /* Check ASN.1 constraints */
+ if(opt_check) {
+ char errbuf[128];
+ size_t errlen = sizeof(errbuf);
+ if(asn_check_constraints(pduType, structure, errbuf, &errlen)) {
+ fprintf(stderr,
+ "%s: ASN.1 constraint "
+ "check failed: %s\n",
+ name, errbuf);
+ exit(EX_DATAERR);
+ }
+ }
+
+ if(osyntax == ATS_INVALID) {
+#ifdef JUNKTEST
+ if(opt_jprob == 0.0) {
+ fprintf(stderr, "%s: decoded successfully\n", name);
+ }
+#else
+ fprintf(stderr, "%s: decoded successfully\n", name);
+#endif
+ } else {
+ erv = asn_encode(NULL, osyntax, pduType, structure, write_out,
+ binary_out);
+
+ if(erv.encoded == -1) {
+ fprintf(stderr, "%s: Cannot convert %s into %s\n", name,
+ pduType->name, ats_simple_name(osyntax));
+ exit(EX_UNAVAILABLE);
+ }
+ DEBUG("Encoded in %zd bytes of %s", erv.encoded,
+ ats_simple_name(osyntax));
+ }
+
+ ASN_STRUCT_FREE(*pduType, structure);
+ }
+
+ if(file && file != stdin) {
+ fclose(file);
+ }
+ }
+ }
+
+#ifdef JUNKTEST
+ if(opt_jprob > 0.0) {
+ fprintf(stderr, "Junked %f OK (%d/%d)\n",
+ opt_jprob, junk_failures, number_of_iterations);
+ }
+#endif /* JUNKTEST */
+
+ return 0;
+}
+
+static struct dynamic_buffer {
+ uint8_t *data; /* Pointer to the data bytes */
+ size_t offset; /* Offset from the start */
+ size_t length; /* Length of meaningful contents */
+ size_t unbits; /* Unused bits in the last byte */
+ size_t allocated; /* Allocated memory for data */
+ int nreallocs; /* Number of data reallocations */
+ off_t bytes_shifted; /* Number of bytes ever shifted */
+} DynamicBuffer;
+
+static void
+buffer_dump() {
+ uint8_t *p = DynamicBuffer.data + DynamicBuffer.offset;
+ uint8_t *e = p + DynamicBuffer.length - (DynamicBuffer.unbits ? 1 : 0);
+ if(!opt_debug) return;
+ DEBUG("Buffer: { d=%p, o=%ld, l=%ld, u=%ld, a=%ld, s=%ld }",
+ DynamicBuffer.data,
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.length,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.allocated,
+ (long)DynamicBuffer.bytes_shifted);
+ for(; p < e; p++) {
+ fprintf(stderr, " %c%c%c%c%c%c%c%c",
+ ((*p >> 7) & 1) ? '1' : '0',
+ ((*p >> 6) & 1) ? '1' : '0',
+ ((*p >> 5) & 1) ? '1' : '0',
+ ((*p >> 4) & 1) ? '1' : '0',
+ ((*p >> 3) & 1) ? '1' : '0',
+ ((*p >> 2) & 1) ? '1' : '0',
+ ((*p >> 1) & 1) ? '1' : '0',
+ ((*p >> 0) & 1) ? '1' : '0');
+ }
+ if(DynamicBuffer.unbits) {
+ unsigned int shift;
+ fprintf(stderr, " ");
+ for(shift = 7; shift >= DynamicBuffer.unbits; shift--)
+ fprintf(stderr, "%c", ((*p >> shift) & 1) ? '1' : '0');
+ fprintf(stderr, " %ld:%ld\n",
+ (long)DynamicBuffer.length - 1,
+ (long)8 - DynamicBuffer.unbits);
+ } else {
+ fprintf(stderr, " %ld\n", (long)DynamicBuffer.length);
+ }
+}
+
+/*
+ * Move the buffer content left N bits, possibly joining it with
+ * preceeding content.
+ */
+static void
+buffer_shift_left(size_t offset, int bits) {
+ uint8_t *ptr = DynamicBuffer.data + DynamicBuffer.offset + offset;
+ uint8_t *end = DynamicBuffer.data + DynamicBuffer.offset
+ + DynamicBuffer.length - 1;
+
+ if(!bits) return;
+
+ DEBUG("Shifting left %d bits off %ld (o=%ld, u=%ld, l=%ld)",
+ bits, (long)offset,
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.length);
+
+ if(offset) {
+ int right;
+ right = ptr[0] >> (8 - bits);
+
+ DEBUG("oleft: %c%c%c%c%c%c%c%c",
+ ((ptr[-1] >> 7) & 1) ? '1' : '0',
+ ((ptr[-1] >> 6) & 1) ? '1' : '0',
+ ((ptr[-1] >> 5) & 1) ? '1' : '0',
+ ((ptr[-1] >> 4) & 1) ? '1' : '0',
+ ((ptr[-1] >> 3) & 1) ? '1' : '0',
+ ((ptr[-1] >> 2) & 1) ? '1' : '0',
+ ((ptr[-1] >> 1) & 1) ? '1' : '0',
+ ((ptr[-1] >> 0) & 1) ? '1' : '0');
+
+ DEBUG("oriht: %c%c%c%c%c%c%c%c",
+ ((ptr[0] >> 7) & 1) ? '1' : '0',
+ ((ptr[0] >> 6) & 1) ? '1' : '0',
+ ((ptr[0] >> 5) & 1) ? '1' : '0',
+ ((ptr[0] >> 4) & 1) ? '1' : '0',
+ ((ptr[0] >> 3) & 1) ? '1' : '0',
+ ((ptr[0] >> 2) & 1) ? '1' : '0',
+ ((ptr[0] >> 1) & 1) ? '1' : '0',
+ ((ptr[0] >> 0) & 1) ? '1' : '0');
+
+ DEBUG("mriht: %c%c%c%c%c%c%c%c",
+ ((right >> 7) & 1) ? '1' : '0',
+ ((right >> 6) & 1) ? '1' : '0',
+ ((right >> 5) & 1) ? '1' : '0',
+ ((right >> 4) & 1) ? '1' : '0',
+ ((right >> 3) & 1) ? '1' : '0',
+ ((right >> 2) & 1) ? '1' : '0',
+ ((right >> 1) & 1) ? '1' : '0',
+ ((right >> 0) & 1) ? '1' : '0');
+
+ ptr[-1] = (ptr[-1] & (0xff << bits)) | right;
+
+ DEBUG("after: %c%c%c%c%c%c%c%c",
+ ((ptr[-1] >> 7) & 1) ? '1' : '0',
+ ((ptr[-1] >> 6) & 1) ? '1' : '0',
+ ((ptr[-1] >> 5) & 1) ? '1' : '0',
+ ((ptr[-1] >> 4) & 1) ? '1' : '0',
+ ((ptr[-1] >> 3) & 1) ? '1' : '0',
+ ((ptr[-1] >> 2) & 1) ? '1' : '0',
+ ((ptr[-1] >> 1) & 1) ? '1' : '0',
+ ((ptr[-1] >> 0) & 1) ? '1' : '0');
+ }
+
+ buffer_dump();
+
+ for(; ptr < end; ptr++) {
+ int right = ptr[1] >> (8 - bits);
+ *ptr = (*ptr << bits) | right;
+ }
+ *ptr <<= bits;
+
+ DEBUG("Unbits [%d=>", (int)DynamicBuffer.unbits);
+ if(DynamicBuffer.unbits == 0) {
+ DynamicBuffer.unbits += bits;
+ } else {
+ DynamicBuffer.unbits += bits;
+ if(DynamicBuffer.unbits > 7) {
+ DynamicBuffer.unbits -= 8;
+ DynamicBuffer.length--;
+ DynamicBuffer.bytes_shifted++;
+ }
+ }
+ DEBUG("Unbits =>%d]", (int)DynamicBuffer.unbits);
+
+ buffer_dump();
+
+ DEBUG("Shifted. Now (o=%ld, u=%ld l=%ld)",
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.length);
+
+
+}
+
+/*
+ * Ensure that the buffer contains at least this amount of free space.
+ */
+static void add_bytes_to_buffer(const void *data2add, size_t bytes) {
+
+ if(bytes == 0) return;
+
+ DEBUG("=> add_bytes(%ld) { o=%ld l=%ld u=%ld, s=%ld }",
+ (long)bytes,
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.length,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.allocated);
+
+ if(DynamicBuffer.allocated
+ >= (DynamicBuffer.offset + DynamicBuffer.length + bytes)) {
+ DEBUG("\tNo buffer reallocation is necessary");
+ } else if(bytes <= DynamicBuffer.offset) {
+ DEBUG("\tContents shifted by %ld", DynamicBuffer.offset);
+
+ /* Shift the buffer contents */
+ memmove(DynamicBuffer.data,
+ DynamicBuffer.data + DynamicBuffer.offset,
+ DynamicBuffer.length);
+ DynamicBuffer.bytes_shifted += DynamicBuffer.offset;
+ DynamicBuffer.offset = 0;
+ } else {
+ size_t newsize = (DynamicBuffer.allocated << 2) + bytes;
+ void *p = MALLOC(newsize);
+ if(!p) {
+ perror("malloc()");
+ exit(EX_OSERR);
+ }
+ memcpy(p,
+ DynamicBuffer.data + DynamicBuffer.offset,
+ DynamicBuffer.length);
+ FREEMEM(DynamicBuffer.data);
+ DynamicBuffer.data = (uint8_t *)p;
+ DynamicBuffer.offset = 0;
+ DynamicBuffer.allocated = newsize;
+ DynamicBuffer.nreallocs++;
+ DEBUG("\tBuffer reallocated to %ld (%d time)",
+ newsize, DynamicBuffer.nreallocs);
+ }
+
+ memcpy(DynamicBuffer.data
+ + DynamicBuffer.offset + DynamicBuffer.length,
+ data2add, bytes);
+ DynamicBuffer.length += bytes;
+ if(DynamicBuffer.unbits) {
+ int bits = DynamicBuffer.unbits;
+ DynamicBuffer.unbits = 0;
+ buffer_shift_left(DynamicBuffer.length - bytes, bits);
+ }
+
+ DEBUG("<= add_bytes(%ld) { o=%ld l=%ld u=%ld, s=%ld }",
+ (long)bytes,
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.length,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.allocated);
+}
+
+static int
+is_syntax_PER(enum asn_transfer_syntax syntax) {
+ return (syntax != ATS_UNALIGNED_BASIC_PER
+ && syntax != ATS_UNALIGNED_CANONICAL_PER);
+}
+
+static int
+restartability_supported(enum asn_transfer_syntax syntax) {
+ return is_syntax_PER(syntax);
+}
+
+static void *
+data_decode_from_file(enum asn_transfer_syntax isyntax, asn_TYPE_descriptor_t *pduType, FILE *file, const char *name, ssize_t suggested_bufsize, int on_first_pdu) {
+ static uint8_t *fbuf;
+ static ssize_t fbuf_size;
+ static asn_codec_ctx_t s_codec_ctx;
+ asn_codec_ctx_t *opt_codec_ctx = 0;
+ void *structure = 0;
+ asn_dec_rval_t rval;
+ size_t old_offset;
+ size_t new_offset;
+ int tolerate_eof;
+ size_t rd;
+
+ if(!file) {
+ fprintf(stderr, "%s: %s\n", name, strerror(errno));
+ errno = EINVAL;
+ return 0;
+ }
+
+ if(opt_stack) {
+ s_codec_ctx.max_stack_size = opt_stack;
+ opt_codec_ctx = &s_codec_ctx;
+ }
+
+ DEBUG("Processing %s", name);
+
+ /* prepare the file buffer */
+ if(fbuf_size != suggested_bufsize) {
+ fbuf = (uint8_t *)REALLOC(fbuf, suggested_bufsize);
+ if(!fbuf) {
+ perror("realloc()");
+ exit(EX_OSERR);
+ }
+ fbuf_size = suggested_bufsize;
+ }
+
+ if(on_first_pdu) {
+ DynamicBuffer.offset = 0;
+ DynamicBuffer.length = 0;
+ DynamicBuffer.unbits = 0;
+ DynamicBuffer.allocated = 0;
+ DynamicBuffer.bytes_shifted = 0;
+ DynamicBuffer.nreallocs = 0;
+ }
+
+ old_offset = DynamicBuffer.bytes_shifted + DynamicBuffer.offset;
+
+ /* Pretend immediate EOF */
+ rval.code = RC_WMORE;
+ rval.consumed = 0;
+
+ for(tolerate_eof = 1; /* Allow EOF first time buffer is non-empty */
+ (rd = fread(fbuf, 1, fbuf_size, file))
+ || feof(file) == 0
+ || (tolerate_eof && DynamicBuffer.length)
+ ;) {
+ int ecbits = 0; /* Extra consumed bits in case of PER */
+ uint8_t *i_bptr;
+ size_t i_size;
+
+ /*
+ * Copy the data over, or use the original buffer.
+ */
+ if(DynamicBuffer.allocated) {
+ /* Append new data into the existing dynamic buffer */
+ add_bytes_to_buffer(fbuf, rd);
+ i_bptr = DynamicBuffer.data + DynamicBuffer.offset;
+ i_size = DynamicBuffer.length;
+ } else {
+ i_bptr = fbuf;
+ i_size = rd;
+ }
+
+ DEBUG("Decoding %ld bytes", (long)i_size);
+
+#ifdef JUNKTEST
+ junk_bytes_with_probability(i_bptr, i_size, opt_jprob);
+#endif
+
+ if(is_syntax_PER(isyntax) && opt_nopad) {
+#ifdef ASN_DISABLE_PER_SUPPORT
+ rval.code = RC_FAIL;
+ rval.consumed = 0;
+#else
+ rval = uper_decode(opt_codec_ctx, pduType, (void **)&structure,
+ i_bptr, i_size, 0, DynamicBuffer.unbits);
+ /* uper_decode() returns bits! */
+ ecbits = rval.consumed % 8; /* Bits consumed from the last byte */
+ rval.consumed >>= 3; /* Convert bits into bytes. */
+#endif
+ /* Non-padded PER decoder */
+ } else {
+ rval = asn_decode(opt_codec_ctx, isyntax, pduType,
+ (void **)&structure, i_bptr, i_size);
+ }
+ if(rval.code == RC_WMORE && !restartability_supported(isyntax)) {
+ /* PER does not support restartability */
+ ASN_STRUCT_FREE(*pduType, structure);
+ structure = 0;
+ rval.consumed = 0;
+ /* Continue accumulating data */
+ }
+
+ DEBUG("decode(%ld) consumed %ld+%db (%ld), code %d",
+ (long)DynamicBuffer.length,
+ (long)rval.consumed, ecbits, (long)i_size,
+ rval.code);
+
+ if(DynamicBuffer.allocated == 0) {
+ /*
+ * Flush remainder into the intermediate buffer.
+ */
+ if(rval.code != RC_FAIL && rval.consumed < rd) {
+ add_bytes_to_buffer(fbuf + rval.consumed,
+ rd - rval.consumed);
+ buffer_shift_left(0, ecbits);
+ DynamicBuffer.bytes_shifted = rval.consumed;
+ rval.consumed = 0;
+ ecbits = 0;
+ }
+ }
+
+ /*
+ * Adjust position inside the source buffer.
+ */
+ if(DynamicBuffer.allocated) {
+ DynamicBuffer.offset += rval.consumed;
+ DynamicBuffer.length -= rval.consumed;
+ } else {
+ DynamicBuffer.bytes_shifted += rval.consumed;
+ }
+
+ switch(rval.code) {
+ case RC_OK:
+ if(ecbits) buffer_shift_left(0, ecbits);
+ DEBUG("RC_OK, finishing up with %ld+%d",
+ (long)rval.consumed, ecbits);
+ return structure;
+ case RC_WMORE:
+ DEBUG("RC_WMORE, continuing read=%ld, cons=%ld "
+ " with %ld..%ld-%ld..%ld",
+ (long)rd,
+ (long)rval.consumed,
+ (long)DynamicBuffer.offset,
+ (long)DynamicBuffer.length,
+ (long)DynamicBuffer.unbits,
+ (long)DynamicBuffer.allocated);
+ if(!rd) tolerate_eof--;
+ continue;
+ case RC_FAIL:
+ break;
+ }
+ break;
+ }
+
+ DEBUG("Clean up partially decoded %s", pduType->name);
+ ASN_STRUCT_FREE(*pduType, structure);
+
+ new_offset = DynamicBuffer.bytes_shifted + DynamicBuffer.offset;
+
+ /*
+ * Print a message and return failure only if not EOF,
+ * unless this is our first PDU (empty file).
+ */
+ if(on_first_pdu
+ || DynamicBuffer.length
+ || new_offset - old_offset > ((isyntax == ATS_BASIC_XER)?sizeof("\r\n")-1:0)
+ ) {
+
+#ifdef JUNKTEST
+ /*
+ * Nothing's wrong with being unable to decode junk.
+ * Simulate EOF.
+ */
+ if(opt_jprob != 0.0) {
+ junk_failures++;
+ errno = 0;
+ return 0;
+ }
+#endif
+
+ DEBUG("ofp %d, no=%ld, oo=%ld, dbl=%ld",
+ on_first_pdu, (long)new_offset, (long)old_offset,
+ (long)DynamicBuffer.length);
+ fprintf(stderr, "%s: "
+ "Decode failed past byte %ld: %s\n",
+ name, (long)new_offset,
+ (rval.code == RC_WMORE)
+ ? "Unexpected end of input"
+ : "Input processing error");
+#ifndef ENOMSG
+#define ENOMSG EINVAL
+#endif
+#ifndef EBADMSG
+#define EBADMSG EINVAL
+#endif
+ errno = (rval.code == RC_WMORE) ? ENOMSG : EBADMSG;
+ } else {
+ /* Got EOF after a few successful PDUs */
+ errno = 0;
+ }
+
+ return 0;
+}
+
+/* Dump the buffer out to the specified FILE */
+static int write_out(const void *buffer, size_t size, void *key) {
+ FILE *fp = (FILE *)key;
+ return (fwrite(buffer, 1, size, fp) == size) ? 0 : -1;
+}
+
+static int argument_is_stdin(char *av[], int idx) {
+ if(strcmp(av[idx], "-")) {
+ return 0; /* Certainly not <stdin> */
+ } else {
+ /* This might be <stdin>, unless `./program -- -` */
+ if(strcmp(av[-1], "--"))
+ return 1;
+ else
+ return 0;
+ }
+}
+
+static FILE *argument_to_file(char *av[], int idx) {
+ return argument_is_stdin(av, idx) ? stdin : fopen(av[idx], "rb");
+}
+
+static char *argument_to_name(char *av[], int idx) {
+ return argument_is_stdin(av, idx) ? "standard input" : av[idx];
+}
+
+#ifdef JUNKTEST
+/*
+ * Fill bytes with some garbage with specified probability (more or less).
+ */
+static void
+junk_bytes_with_probability(uint8_t *buf, size_t size, double prob) {
+ static int junkmode;
+ uint8_t *ptr;
+ uint8_t *end;
+ if(opt_jprob <= 0.0) return;
+ for(ptr = buf, end = ptr + size; ptr < end; ptr++) {
+ int byte = *ptr;
+ if(junkmode++ & 1) {
+ if((((double)random() / RAND_MAX) < prob))
+ byte = random() & 0xff;
+ } else {
+#define BPROB(b) ((((double)random() / RAND_MAX) < prob) ? b : 0)
+ byte ^= BPROB(0x80);
+ byte ^= BPROB(0x40);
+ byte ^= BPROB(0x20);
+ byte ^= BPROB(0x10);
+ byte ^= BPROB(0x08);
+ byte ^= BPROB(0x04);
+ byte ^= BPROB(0x02);
+ byte ^= BPROB(0x01);
+ }
+ if(byte != *ptr) {
+ DEBUG("Junk buf[%d] %02x -> %02x", ptr - buf, *ptr, byte);
+ *ptr = byte;
+ }
+ }
+}
+#endif /* JUNKTEST */
+