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-rw-r--r--lib/nghttp3_frame.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/lib/nghttp3_frame.c b/lib/nghttp3_frame.c
new file mode 100644
index 0000000..e7d64fb
--- /dev/null
+++ b/lib/nghttp3_frame.c
@@ -0,0 +1,204 @@
+/*
+ * nghttp3
+ *
+ * Copyright (c) 2019 nghttp3 contributors
+ * Copyright (c) 2013 nghttp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "nghttp3_frame.h"
+
+#include <string.h>
+#include <assert.h>
+
+#include "nghttp3_conv.h"
+#include "nghttp3_str.h"
+
+uint8_t *nghttp3_frame_write_hd(uint8_t *p, const nghttp3_frame_hd *hd) {
+ p = nghttp3_put_varint(p, hd->type);
+ p = nghttp3_put_varint(p, hd->length);
+ return p;
+}
+
+size_t nghttp3_frame_write_hd_len(const nghttp3_frame_hd *hd) {
+ return nghttp3_put_varintlen(hd->type) + nghttp3_put_varintlen(hd->length);
+}
+
+uint8_t *nghttp3_frame_write_settings(uint8_t *p,
+ const nghttp3_frame_settings *fr) {
+ size_t i;
+
+ p = nghttp3_frame_write_hd(p, &fr->hd);
+
+ for (i = 0; i < fr->niv; ++i) {
+ p = nghttp3_put_varint(p, (int64_t)fr->iv[i].id);
+ p = nghttp3_put_varint(p, (int64_t)fr->iv[i].value);
+ }
+
+ return p;
+}
+
+size_t nghttp3_frame_write_settings_len(int64_t *ppayloadlen,
+ const nghttp3_frame_settings *fr) {
+ size_t payloadlen = 0;
+ size_t i;
+
+ for (i = 0; i < fr->niv; ++i) {
+ payloadlen += nghttp3_put_varintlen((int64_t)fr->iv[i].id) +
+ nghttp3_put_varintlen((int64_t)fr->iv[i].value);
+ }
+
+ *ppayloadlen = (int64_t)payloadlen;
+
+ return nghttp3_put_varintlen(NGHTTP3_FRAME_SETTINGS) +
+ nghttp3_put_varintlen((int64_t)payloadlen) + payloadlen;
+}
+
+uint8_t *nghttp3_frame_write_goaway(uint8_t *p,
+ const nghttp3_frame_goaway *fr) {
+ p = nghttp3_frame_write_hd(p, &fr->hd);
+ p = nghttp3_put_varint(p, fr->id);
+
+ return p;
+}
+
+size_t nghttp3_frame_write_goaway_len(int64_t *ppayloadlen,
+ const nghttp3_frame_goaway *fr) {
+ size_t payloadlen = nghttp3_put_varintlen(fr->id);
+
+ *ppayloadlen = (int64_t)payloadlen;
+
+ return nghttp3_put_varintlen(NGHTTP3_FRAME_GOAWAY) +
+ nghttp3_put_varintlen((int64_t)payloadlen) + payloadlen;
+}
+
+uint8_t *
+nghttp3_frame_write_priority_update(uint8_t *p,
+ const nghttp3_frame_priority_update *fr) {
+ p = nghttp3_frame_write_hd(p, &fr->hd);
+ p = nghttp3_put_varint(p, fr->pri_elem_id);
+
+ assert(fr->pri.urgency <= NGHTTP3_URGENCY_LOW);
+
+ *p++ = 'u';
+ *p++ = '=';
+ *p++ = (uint8_t)('0' + fr->pri.urgency);
+
+ if (fr->pri.inc) {
+#define NGHTTP3_PRIORITY_INCREMENTAL ", i"
+ p = nghttp3_cpymem(p, (const uint8_t *)NGHTTP3_PRIORITY_INCREMENTAL,
+ sizeof(NGHTTP3_PRIORITY_INCREMENTAL) - 1);
+ }
+
+ return p;
+}
+
+size_t nghttp3_frame_write_priority_update_len(
+ int64_t *ppayloadlen, const nghttp3_frame_priority_update *fr) {
+ size_t payloadlen = nghttp3_put_varintlen(fr->pri_elem_id) + sizeof("u=U") -
+ 1 + (fr->pri.inc ? sizeof(", i") - 1 : 0);
+
+ *ppayloadlen = (int64_t)payloadlen;
+
+ return nghttp3_put_varintlen(fr->hd.type) +
+ nghttp3_put_varintlen((int64_t)payloadlen) + payloadlen;
+}
+
+int nghttp3_nva_copy(nghttp3_nv **pnva, const nghttp3_nv *nva, size_t nvlen,
+ const nghttp3_mem *mem) {
+ size_t i;
+ uint8_t *data = NULL;
+ size_t buflen = 0;
+ nghttp3_nv *p;
+
+ if (nvlen == 0) {
+ *pnva = NULL;
+
+ return 0;
+ }
+
+ for (i = 0; i < nvlen; ++i) {
+ /* + 1 for null-termination */
+ if ((nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_NAME) == 0) {
+ buflen += nva[i].namelen + 1;
+ }
+ if ((nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_VALUE) == 0) {
+ buflen += nva[i].valuelen + 1;
+ }
+ }
+
+ buflen += sizeof(nghttp3_nv) * nvlen;
+
+ *pnva = nghttp3_mem_malloc(mem, buflen);
+
+ if (*pnva == NULL) {
+ return NGHTTP3_ERR_NOMEM;
+ }
+
+ p = *pnva;
+ data = (uint8_t *)(*pnva) + sizeof(nghttp3_nv) * nvlen;
+
+ for (i = 0; i < nvlen; ++i) {
+ p->flags = nva[i].flags;
+
+ if (nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_NAME) {
+ p->name = nva[i].name;
+ p->namelen = nva[i].namelen;
+ } else {
+ if (nva[i].namelen) {
+ memcpy(data, nva[i].name, nva[i].namelen);
+ }
+ p->name = data;
+ p->namelen = nva[i].namelen;
+ data[p->namelen] = '\0';
+ nghttp3_downcase(p->name, p->namelen);
+ data += nva[i].namelen + 1;
+ }
+
+ if (nva[i].flags & NGHTTP3_NV_FLAG_NO_COPY_VALUE) {
+ p->value = nva[i].value;
+ p->valuelen = nva[i].valuelen;
+ } else {
+ if (nva[i].valuelen) {
+ memcpy(data, nva[i].value, nva[i].valuelen);
+ }
+ p->value = data;
+ p->valuelen = nva[i].valuelen;
+ data[p->valuelen] = '\0';
+ data += nva[i].valuelen + 1;
+ }
+
+ ++p;
+ }
+ return 0;
+}
+
+void nghttp3_nva_del(nghttp3_nv *nva, const nghttp3_mem *mem) {
+ nghttp3_mem_free(mem, nva);
+}
+
+void nghttp3_frame_headers_free(nghttp3_frame_headers *fr,
+ const nghttp3_mem *mem) {
+ if (fr == NULL) {
+ return;
+ }
+
+ nghttp3_nva_del(fr->nva, mem);
+}