author | Tero Marttila <terom@fixme.fi> |
Thu, 12 Mar 2009 20:00:48 +0200 | |
changeset 40 | 51678c7eae03 |
child 41 | 40f7aa051acb |
permissions | -rw-r--r-- |
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#include "sock_test.h" |
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#include <stdlib.h> |
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#include <string.h> |
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#include <assert.h> |
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static err_t sock_test_read (struct sock_stream *base_sock, void *buf_ptr, size_t *len) |
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{ |
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struct sock_test *sock = SOCK_FROM_BASE(base_sock, struct sock_test); |
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struct io_buf *buf = &sock->recv_buf; |
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struct io_vec *vec = buf->vec; |
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// no current vector -> EOF |
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if (!vec) |
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return ERR_READ_EOF; |
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// vector past the end -> EOF |
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if (vec == &buf->vecs[buf->count]) |
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return ERR_READ_EOF; |
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// no data left in current vector -> EOF |
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if (buf->off >= vec->len) |
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return ERR_READ_EOF; |
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// amount of data available in this iovec |
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size_t available = vec->len - buf->off; |
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// amount to read |
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size_t to_read = *len; |
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// trim down? |
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if (to_read > available) |
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to_read = available; |
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// copy |
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memcpy(buf_ptr, vec->buf + buf->off, to_read); |
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// consumed the whole vec? |
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if (to_read < available) { |
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// move offset |
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buf->off += to_read; |
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} else { |
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// next vector |
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buf->vec++; |
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} |
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// update len |
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*len = to_read; |
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// ok |
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return SUCCESS; |
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} |
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static err_t sock_test_write (struct sock_stream *base_sock, const void *buf_ptr, size_t *len) |
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{ |
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struct sock_test *sock = SOCK_FROM_BASE(base_sock, struct sock_test); |
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struct io_buf *buf = &sock->send_buf; |
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struct io_vec *vec = buf->vec; |
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// vectors full? |
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if (buf->vecs == NULL || vec == &buf->vecs[buf->count]) { |
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size_t vec_offset = vec ? (vec - buf->vecs) : 0; |
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struct io_vec *v; |
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// new size |
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buf->count = buf->count * 2 + 1; |
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// grow |
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assert((buf->vecs = realloc(buf->vecs, buf->count * sizeof(struct io_vec)))); |
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// set vec |
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vec = buf->vec = buf->vecs + vec_offset; |
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// zero |
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for (v = vec; v < &buf->vecs[buf->count]; v++) { |
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v->buf = NULL; |
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v->len = 0; |
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} |
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} |
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// store |
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vec->len = *len; |
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assert((vec->buf = malloc(vec->len))); |
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memcpy(vec->buf, buf_ptr, vec->len); |
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// move vec onwards |
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buf->vec++; |
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// ok |
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return SUCCESS; |
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} |
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static err_t sock_test_event_init (struct sock_stream *base_sock) |
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{ |
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return SUCCESS; |
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} |
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static err_t sock_test_event_enable (struct sock_stream *base_sock, short mask) |
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{ |
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return SUCCESS; |
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} |
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static void sock_test_release (struct sock_stream *base_sock) |
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{ |
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} |
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/* |
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* Our sock_stream_type |
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*/ |
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static struct sock_stream_type sock_test_type = { |
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.methods = { |
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.read = &sock_test_read, |
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.write = &sock_test_write, |
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.event_init = &sock_test_event_init, |
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.event_enable = &sock_test_event_enable, |
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.release = &sock_test_release, |
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}, |
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}; |
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struct sock_test* sock_test_create (void) |
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{ |
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struct sock_test *sock; |
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// allocate |
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assert((sock = calloc(1, sizeof(*sock)))); |
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// initialize base with our sock_stream_type |
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sock_stream_init(SOCK_TEST_BASE(sock), &sock_test_type); |
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// ok |
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return sock; |
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} |
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void sock_test_set_recv_buffer (struct sock_test *sock, struct io_vec *vecs, size_t count) |
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{ |
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sock->recv_buf.vecs = vecs; |
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sock->recv_buf.count = count; |
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sock->recv_buf.vec = vecs; |
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sock->recv_buf.off = 0; |
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} |
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void sock_test_get_send_data (struct sock_test *sock, char **buf_ptr, size_t *len_ptr) |
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{ |
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struct io_buf *buf = &sock->send_buf; |
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size_t len = 0, i, off = 0; |
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char *out; |
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// calculate total size |
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for (i = 0; i < buf->count; i++) { |
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len += buf->vecs[i].len; |
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} |
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// alloc |
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assert((out = malloc(len))); |
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// copy |
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for (i = 0; i < buf->count; i++) { |
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memcpy(out + off, buf->vecs[i].buf, buf->vecs[i].len); |
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off += buf->vecs[i].len; |
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} |
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// update return |
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*buf_ptr = out; |
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*len_ptr = len; |
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} |
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170 |