+
+typedef struct mempacket_st {
+ unsigned char *data;
+ int len;
+ unsigned int num;
+ unsigned int type;
+} MEMPACKET;
+
+DEFINE_STACK_OF(MEMPACKET)
+
+static void mempacket_free(MEMPACKET *pkt)
+{
+ if (pkt->data != NULL)
+ OPENSSL_free(pkt->data);
+ OPENSSL_free(pkt);
+}
+
+typedef struct mempacket_test_ctx_st {
+ STACK_OF(MEMPACKET) *pkts;
+ unsigned int epoch;
+ unsigned int currrec;
+ unsigned int currpkt;
+ unsigned int lastpkt;
+ unsigned int noinject;
+} MEMPACKET_TEST_CTX;
+
+static int mempacket_test_new(BIO *bi);
+static int mempacket_test_free(BIO *a);
+static int mempacket_test_read(BIO *b, char *out, int outl);
+static int mempacket_test_write(BIO *b, const char *in, int inl);
+static long mempacket_test_ctrl(BIO *b, int cmd, long num, void *ptr);
+static int mempacket_test_gets(BIO *bp, char *buf, int size);
+static int mempacket_test_puts(BIO *bp, const char *str);
+
+const BIO_METHOD *bio_s_mempacket_test(void)
+{
+ if (method_mempacket_test == NULL) {
+ method_mempacket_test = BIO_meth_new(BIO_TYPE_MEMPACKET_TEST,
+ "Mem Packet Test");
+ if ( method_mempacket_test == NULL
+ || !BIO_meth_set_write(method_mempacket_test, mempacket_test_write)
+ || !BIO_meth_set_read(method_mempacket_test, mempacket_test_read)
+ || !BIO_meth_set_puts(method_mempacket_test, mempacket_test_puts)
+ || !BIO_meth_set_gets(method_mempacket_test, mempacket_test_gets)
+ || !BIO_meth_set_ctrl(method_mempacket_test, mempacket_test_ctrl)
+ || !BIO_meth_set_create(method_mempacket_test, mempacket_test_new)
+ || !BIO_meth_set_destroy(method_mempacket_test, mempacket_test_free))
+ return NULL;
+ }
+ return method_mempacket_test;
+}
+
+void bio_s_mempacket_test_free(void)
+{
+ BIO_meth_free(method_mempacket_test);
+}
+
+static int mempacket_test_new(BIO *bio)
+{
+ MEMPACKET_TEST_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
+ if (ctx == NULL)
+ return 0;
+ ctx->pkts = sk_MEMPACKET_new_null();
+ if (ctx->pkts == NULL) {
+ OPENSSL_free(ctx);
+ return 0;
+ }
+ BIO_set_init(bio, 1);
+ BIO_set_data(bio, ctx);
+ return 1;
+}
+
+static int mempacket_test_free(BIO *bio)
+{
+ MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+
+ sk_MEMPACKET_pop_free(ctx->pkts, mempacket_free);
+ OPENSSL_free(ctx);
+ BIO_set_data(bio, NULL);
+ BIO_set_init(bio, 0);
+
+ return 1;
+}
+
+/* Record Header values */
+#define EPOCH_HI 4
+#define EPOCH_LO 5
+#define RECORD_SEQUENCE 10
+#define RECORD_LEN_HI 11
+#define RECORD_LEN_LO 12
+
+#define STANDARD_PACKET 0
+
+static int mempacket_test_read(BIO *bio, char *out, int outl)
+{
+ MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+ MEMPACKET *thispkt;
+ unsigned char *rec;
+ int rem;
+ unsigned int seq, offset, len, epoch;
+
+ BIO_clear_retry_flags(bio);
+
+ thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
+ if (thispkt == NULL || thispkt->num != ctx->currpkt) {
+ /* Probably run out of data */
+ BIO_set_retry_read(bio);
+ return -1;
+ }
+ sk_MEMPACKET_shift(ctx->pkts);
+ ctx->currpkt++;
+
+ if (outl > thispkt->len)
+ outl = thispkt->len;
+
+ if (thispkt->type != INJECT_PACKET_IGNORE_REC_SEQ) {
+ /*
+ * Overwrite the record sequence number. We strictly number them in
+ * the order received. Since we are actually a reliable transport
+ * we know that there won't be any re-ordering. We overwrite to deal
+ * with any packets that have been injected
+ */
+ rem = thispkt->len;
+ rec = thispkt->data;
+ while (rem > 0) {
+ if (rem < DTLS1_RT_HEADER_LENGTH) {
+ return -1;
+ }
+ epoch = (rec[EPOCH_HI] << 8) | rec[EPOCH_LO];
+ if (epoch != ctx->epoch) {
+ ctx->epoch = epoch;
+ ctx->currrec = 0;
+ }
+ seq = ctx->currrec;
+ offset = 0;
+ do {
+ rec[RECORD_SEQUENCE - offset] = seq & 0xFF;
+ seq >>= 8;
+ offset++;
+ } while (seq > 0);
+ ctx->currrec++;
+
+ len = ((rec[RECORD_LEN_HI] << 8) | rec[RECORD_LEN_LO])
+ + DTLS1_RT_HEADER_LENGTH;
+
+ rec += len;
+ rem -= len;
+ }
+ }
+
+ memcpy(out, thispkt->data, outl);
+
+ mempacket_free(thispkt);
+
+ return outl;
+}
+
+int mempacket_test_inject(BIO *bio, const char *in, int inl, int pktnum,
+ int type)
+{
+ MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+ MEMPACKET *thispkt, *looppkt, *nextpkt;
+ int i;
+
+ if (ctx == NULL)
+ return -1;
+
+ /* We only allow injection before we've started writing any data */
+ if (pktnum >= 0) {
+ if (ctx->noinject)
+ return -1;
+ } else {
+ ctx->noinject = 1;
+ }
+
+ thispkt = OPENSSL_malloc(sizeof(MEMPACKET));
+ if (thispkt == NULL)
+ return -1;
+
+ thispkt->data = OPENSSL_malloc(inl);
+ if (thispkt->data == NULL) {
+ mempacket_free(thispkt);
+ return -1;
+ }
+
+ memcpy(thispkt->data, in, inl);
+ thispkt->len = inl;
+ thispkt->num = (pktnum >= 0) ? (unsigned int)pktnum : ctx->lastpkt;
+ thispkt->type = type;
+
+ for(i = 0; (looppkt = sk_MEMPACKET_value(ctx->pkts, i)) != NULL; i++) {
+ /* Check if we found the right place to insert this packet */
+ if (looppkt->num > thispkt->num) {
+ if (sk_MEMPACKET_insert(ctx->pkts, thispkt, i) == 0) {
+ mempacket_free(thispkt);
+ return -1;
+ }
+ /* If we're doing up front injection then we're done */
+ if (pktnum >= 0)
+ return inl;
+ /*
+ * We need to do some accounting on lastpkt. We increment it first,
+ * but it might now equal the value of injected packets, so we need
+ * to skip over those
+ */
+ ctx->lastpkt++;
+ do {
+ i++;
+ nextpkt = sk_MEMPACKET_value(ctx->pkts, i);
+ if (nextpkt != NULL && nextpkt->num == ctx->lastpkt)
+ ctx->lastpkt++;
+ else
+ return inl;
+ } while(1);
+ } else if(looppkt->num == thispkt->num) {
+ if (!ctx->noinject) {
+ /* We injected two packets with the same packet number! */
+ return -1;
+ }
+ ctx->lastpkt++;
+ thispkt->num++;
+ }
+ }
+ /*
+ * We didn't find any packets with a packet number equal to or greater than
+ * this one, so we just add it onto the end
+ */
+ if (!sk_MEMPACKET_push(ctx->pkts, thispkt)) {
+ mempacket_free(thispkt);
+ return -1;
+ }
+
+ if (pktnum < 0)
+ ctx->lastpkt++;
+
+ return inl;
+}
+
+static int mempacket_test_write(BIO *bio, const char *in, int inl)
+{
+ return mempacket_test_inject(bio, in, inl, -1, STANDARD_PACKET);
+}
+
+static long mempacket_test_ctrl(BIO *bio, int cmd, long num, void *ptr)
+{
+ long ret = 1;
+ MEMPACKET_TEST_CTX *ctx = BIO_get_data(bio);
+ MEMPACKET *thispkt;
+
+ switch (cmd) {
+ case BIO_CTRL_EOF:
+ ret = (long)(sk_MEMPACKET_num(ctx->pkts) == 0);
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = BIO_get_shutdown(bio);
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ BIO_set_shutdown(bio, (int)num);
+ break;
+ case BIO_CTRL_WPENDING:
+ ret = 0L;
+ break;
+ case BIO_CTRL_PENDING:
+ thispkt = sk_MEMPACKET_value(ctx->pkts, 0);
+ if (thispkt == NULL)
+ ret = 0;
+ else
+ ret = thispkt->len;
+ break;
+ case BIO_CTRL_FLUSH:
+ ret = 1;
+ break;
+ case BIO_CTRL_RESET:
+ case BIO_CTRL_DUP:
+ case BIO_CTRL_PUSH:
+ case BIO_CTRL_POP:
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int mempacket_test_gets(BIO *bio, char *buf, int size)
+{
+ /* We don't support this - not needed anyway */
+ return -1;
+}
+
+static int mempacket_test_puts(BIO *bio, const char *str)
+{
+ return mempacket_test_write(bio, str, strlen(str));
+}
+
projects / openssl.git / commitdiff