34 static int tls_buffer_resize(struct tls_buffer *buf, size_t capacity);
39 	struct tls_buffer *buf = NULL;  in tls_buffer_new()  local
41 	if ((buf = calloc(1, sizeof(struct tls_buffer))) == NULL)  in tls_buffer_new()
44 	buf->capacity_limit = TLS_BUFFER_CAPACITY_LIMIT;  in tls_buffer_new()
46 	if (!tls_buffer_resize(buf, init_size))  in tls_buffer_new()
49 	return buf;  in tls_buffer_new()
52 	tls_buffer_free(buf);  in tls_buffer_new()
58 tls_buffer_clear(struct tls_buffer *buf)  in tls_buffer_clear()  argument
60 	freezero(buf->data, buf->capacity);  in tls_buffer_clear()
62 	buf->data = NULL;  in tls_buffer_clear()
63 	buf->capacity = 0;  in tls_buffer_clear()
64 	buf->len = 0;  in tls_buffer_clear()
65 	buf->offset = 0;  in tls_buffer_clear()
69 tls_buffer_free(struct tls_buffer *buf)  in tls_buffer_free()  argument
71 	if (buf == NULL)  in tls_buffer_free()
74 	tls_buffer_clear(buf);  in tls_buffer_free()
76 	freezero(buf, sizeof(struct tls_buffer));  in tls_buffer_free()
80 tls_buffer_grow(struct tls_buffer *buf, size_t capacity)  in tls_buffer_grow()  argument
82 	if (buf->capacity >= capacity)  in tls_buffer_grow()
85 	return tls_buffer_resize(buf, capacity);  in tls_buffer_grow()
89 tls_buffer_resize(struct tls_buffer *buf, size_t capacity)  in tls_buffer_resize()  argument
97 	if (buf->capacity == capacity)  in tls_buffer_resize()
100 	if (capacity > buf->capacity_limit)  in tls_buffer_resize()
103 	if ((data = recallocarray(buf->data, buf->capacity, capacity, 1)) == NULL)  in tls_buffer_resize()
106 	buf->data = data;  in tls_buffer_resize()
107 	buf->capacity = capacity;  in tls_buffer_resize()
110 	if (buf->len > buf->capacity)  in tls_buffer_resize()
111 		buf->len = buf->capacity;  in tls_buffer_resize()
112 	if (buf->offset > buf->len)  in tls_buffer_resize()
113 		buf->offset = buf->len;  in tls_buffer_resize()
119 tls_buffer_set_capacity_limit(struct tls_buffer *buf, size_t limit)  in tls_buffer_set_capacity_limit()  argument
125 	buf->capacity_limit = limit;  in tls_buffer_set_capacity_limit()
129 tls_buffer_extend(struct tls_buffer *buf, size_t len,  in tls_buffer_extend()  argument
134 	if (len == buf->len)  in tls_buffer_extend()
135 		return buf->len;  in tls_buffer_extend()
137 	if (len < buf->len)  in tls_buffer_extend()
140 	if (!tls_buffer_resize(buf, len))  in tls_buffer_extend()
144 		if ((ret = read_cb(&buf->data[buf->len],  in tls_buffer_extend()
145 		    buf->capacity - buf->len, cb_arg)) <= 0)  in tls_buffer_extend()
148 		if (ret > buf->capacity - buf->len)  in tls_buffer_extend()
151 		buf->len += ret;  in tls_buffer_extend()
153 		if (buf->len == buf->capacity)  in tls_buffer_extend()
154 			return buf->len;  in tls_buffer_extend()
159 tls_buffer_remaining(struct tls_buffer *buf)  in tls_buffer_remaining()  argument
161 	if (buf->offset > buf->len)  in tls_buffer_remaining()
164 	return buf->len - buf->offset;  in tls_buffer_remaining()
168 tls_buffer_read(struct tls_buffer *buf, uint8_t *rbuf, size_t n)  in tls_buffer_read()  argument
170 	if (buf->offset > buf->len)  in tls_buffer_read()
173 	if (buf->offset == buf->len)  in tls_buffer_read()
176 	if (n > buf->len - buf->offset)  in tls_buffer_read()
177 		n = buf->len - buf->offset;  in tls_buffer_read()
179 	memcpy(rbuf, &buf->data[buf->offset], n);  in tls_buffer_read()
181 	buf->offset += n;  in tls_buffer_read()
187 tls_buffer_write(struct tls_buffer *buf, const uint8_t *wbuf, size_t n)  in tls_buffer_write()  argument
189 	if (buf->offset > buf->len)  in tls_buffer_write()
198 	if (buf->offset == buf->len) {  in tls_buffer_write()
199 		buf->len = 0;  in tls_buffer_write()
200 		buf->offset = 0;  in tls_buffer_write()
202 	if (buf->offset >= 4096) {  in tls_buffer_write()
203 		memmove(buf->data, &buf->data[buf->offset],  in tls_buffer_write()
204 		    buf->len - buf->offset);  in tls_buffer_write()
205 		buf->len -= buf->offset;  in tls_buffer_write()
206 		buf->offset = 0;  in tls_buffer_write()
209 	if (buf->len > SIZE_MAX - n)  in tls_buffer_write()
211 	if (!tls_buffer_grow(buf, buf->len + n))  in tls_buffer_write()
214 	memcpy(&buf->data[buf->len], wbuf, n);  in tls_buffer_write()
216 	buf->len += n;  in tls_buffer_write()
222 tls_buffer_append(struct tls_buffer *buf, const uint8_t *wbuf, size_t n)  in tls_buffer_append()  argument
224 	return tls_buffer_write(buf, wbuf, n) == n;  in tls_buffer_append()
228 tls_buffer_data(struct tls_buffer *buf, CBS *out_cbs)  in tls_buffer_data()  argument
232 	CBS_init(&cbs, buf->data, buf->len);  in tls_buffer_data()
234 	if (!CBS_skip(&cbs, buf->offset))  in tls_buffer_data()
243 tls_buffer_finish(struct tls_buffer *buf, uint8_t **out, size_t *out_len)  in tls_buffer_finish()  argument
248 	*out = buf->data;  in tls_buffer_finish()
249 	*out_len = buf->len;  in tls_buffer_finish()
251 	buf->data = NULL;  in tls_buffer_finish()
252 	buf->capacity = 0;  in tls_buffer_finish()
253 	buf->len = 0;  in tls_buffer_finish()
254 	buf->offset = 0;  in tls_buffer_finish()