Better start from scratch on udp tracker support.

btpd/udp_tr_if.c

@@ -1,84 +0,0 @@
-#include "btpd.h"
-
-#include <evdns.h>
-
-struct udp_tr_req {
-    enum { UDP_RESOLVE, UDP_CONN_SEND, UDP_CONN_RECV,
-           UDP_ANN_SEND, UDP_ANN_RECV } state;
-    int cancel;
-    char *host;
-    uint16_t port;
-    uint32_t ip;
-    struct event timer;
-    BTPDQ_ENTRY(udp_tr_req) entry;
-};
-
-BTPDQ_HEAD(udp_req_tq, udp_tr_req);
-
-static int m_sd;
-static struct event m_recv;
-static struct event m_send;
-static struct udp_req_tq m_reqq = BTPDQ_HEAD_INITIALIZER(m_reqq);
-
-static void
-req_kill(struct udp_tr_req *req)
-{
-    free(req);
-}
-
-struct udp_tr_req *
-udp_tr_req(struct torrent *tp, enum tr_event event, const char *aurl)
-{
-    return NULL;
-}
-
-void
-udp_tr_cancel(struct udp_tr_req *req)
-{
-}
-
-void
-udp_tr_init(void)
-{
-    struct sockaddr_in addr;
-    addr.sin_family = AF_INET;
-    addr.sin_addr.s_addr = INADDR_ANY;
-    addr.sin_port = 0;
-
-    if ((m_sd = socket(PF_INET, SOCK_DGRAM, 0)) < 0)
-        btpd_err("socket: %s\n", strerror(errno));
-
-    if (bind(m_sd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
-        btpd_err("bind: %s\n", strerror(errno));
-
-    event_set(&m_recv, m_sd, EV_READ, sock_cb, NULL);
-    event_set(&m_send, m_sd, EV_WRITE, sock_cb, NULL);
-}
-
-static void
-sock_cb(int sd, short type, void *arg)
-{
-}
-
-static void
-send_conn(struct udp_tr_req *req)
-{
-    req->state = UDP_CONN_SEND;
-}
-
-static void
-udp_dnscb(int result, char type, int count, int ttl, void *addrs, void *arg)
-{
-    struct udp_tr_req *req = arg;
-    if (req->cancel)
-        req_kill(req);
-    else if (result == DNS_ERR_NONE && type == DNS_IPv4_A && count > 0) {
-        int addri = rand_between(0, count - 1);
-        bcopy(addrs + addri * 4, &req->ip, 4);
-        send_conn(req);
-    } else {
-        btpd_log(BTPD_L_ERROR, "failed to lookup '%s'.\n", req->host);
-        tr_result(req->tp, TR_RES_FAIL, -1);
-        req_kill(req);
-    }
-}