/* Print message to buffer. If buffer is large enough to hold the message,
* return buffer. If buffer is to small, allocate large enough buffer on heap,
* and return allocated buffer. */
int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap) {
va_list ap_copy;
int len;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
if (len < 0) {
/* eCos and Windows are not standard-compliant and return -1 when
* the buffer is too small. Keep allocating larger buffers until we
* succeed or out of memory. */
*buf = NULL;
while (len < 0) {
NS_FREE(*buf);
size *= 2;
if ((*buf = (char *) NS_MALLOC(size)) == NULL) break;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
}
} else if (len > (int) size) {
/* Standard-compliant code path. Allocate a buffer that is large enough. */
if ((*buf = (char *) NS_MALLOC(len + 1)) == NULL) {
len = -1;
} else {
va_copy(ap_copy, ap);
len = vsnprintf(*buf, len + 1, fmt, ap_copy);
va_end(ap_copy);
}
}
return len;
}
void ns_hexdump_connection(struct ns_connection *nc, const char *path,
int num_bytes, int ev) {
const struct mbuf *io = ev == NS_SEND ? &nc->send_mbuf : &nc->recv_mbuf;
FILE *fp;
char *buf, src[60], dst[60];
int buf_size = num_bytes * 5 + 100;
if ((fp = fopen(path, "a")) != NULL) {
ns_sock_to_str(nc->sock, src, sizeof(src), 3);
ns_sock_to_str(nc->sock, dst, sizeof(dst), 7);
fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL),
nc->user_data, src,
ev == NS_RECV ? "<-" : ev == NS_SEND ? "->" : ev == NS_ACCEPT
? "<A"
: ev == NS_CONNECT
? "C>"
: "XX",
dst, num_bytes);
if (num_bytes > 0 && (buf = (char *) NS_MALLOC(buf_size)) != NULL) {
ns_hexdump(io->buf + (ev == NS_SEND ? 0 : io->len) -
(ev == NS_SEND ? 0 : num_bytes),
num_bytes, buf, buf_size);
fprintf(fp, "%s", buf);
NS_FREE(buf);
}
fclose(fp);
}
}
/*
* Create a connection, associate it with the given socket and event handler,
* and add to the manager.
*
* See the `ns_add_sock_opts` structure for a description of the options.
*/
struct ns_connection *ns_add_sock_opt(struct ns_mgr *s, sock_t sock,
ns_event_handler_t callback,
struct ns_add_sock_opts opts) {
struct ns_connection *conn;
if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) {
memset(conn, 0, sizeof(*conn));
ns_set_non_blocking_mode(sock);
ns_set_close_on_exec(sock);
conn->sock = sock;
conn->handler = callback;
conn->mgr = s;
conn->last_io_time = time(NULL);
conn->flags = opts.flags;
conn->user_data = opts.user_data;
ns_add_conn(s, conn);
DBG(("%p %d", conn, sock));
}
return conn;
}
NS_INTERNAL struct ns_connection *ns_create_connection(
struct ns_mgr *mgr, ns_event_handler_t callback,
struct ns_add_sock_opts opts) {
struct ns_connection *conn;
if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) {
memset(conn, 0, sizeof(*conn));
conn->sock = INVALID_SOCKET;
conn->handler = callback;
conn->mgr = mgr;
conn->last_io_time = time(NULL);
conn->flags = opts.flags & _NS_ALLOWED_CONNECT_FLAGS_MASK;
conn->user_data = opts.user_data;
/*
* SIZE_MAX is defined as a long long constant in
* system headers on some platforms and so it
* doesn't compile with pedantic ansi flags.
*/
conn->recv_mbuf_limit = ~0;
}
return conn;
}