1 /*
2  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
20 
21 #include <event.h>
22 #include <limits.h>
23 #include <sha1.h>
24 #include <sha2.h>
25 #include <stdint.h>
26 #include <stdio.h>
27 #include <string.h>
28 
29 #include <imsg.h>
30 
31 #include "got_error.h"
32 #include "got_object.h"
33 #include "got_path.h"
34 
35 #include "got_lib_hash.h"
36 
37 #include "gotd.h"
38 #include "log.h"
39 
40 void
41 gotd_imsg_send_ack(struct got_object_id *id, struct imsgbuf *ibuf,
42     uint32_t peerid, pid_t pid)
43 {
44 	const struct got_error *err = NULL;
45 	struct gotd_imsg_ack iack;
46 	char hex[SHA1_DIGEST_STRING_LENGTH];
47 
48 	if (log_getverbose() > 0 &&
49 	    got_sha1_digest_to_str(id->sha1, hex, sizeof(hex)))
50 		log_debug("sending ACK for %s", hex);
51 
52 	memset(&iack, 0, sizeof(iack));
53 	memcpy(iack.object_id, id->sha1, SHA1_DIGEST_LENGTH);
54 
55 	if (imsg_compose(ibuf, GOTD_IMSG_ACK, peerid, pid, -1,
56 	    &iack, sizeof(iack)) == -1) {
57 		err = got_error_from_errno("imsg_compose ACK");
58 		goto done;
59 	}
60 
61 	err = gotd_imsg_flush(ibuf);
62 done:
63 	if (err)
64 		log_warnx("sending ACK: %s", err->msg);
65 }
66 
67 void
68 gotd_imsg_send_nak(struct got_object_id *id, struct imsgbuf *ibuf,
69     uint32_t peerid, pid_t pid)
70 {
71 	const struct got_error *err = NULL;
72 	struct gotd_imsg_nak inak;
73 	char hex[SHA1_DIGEST_STRING_LENGTH];
74 
75 	if (log_getverbose() > 0 &&
76 	    got_sha1_digest_to_str(id->sha1, hex, sizeof(hex)))
77 		log_debug("sending NAK for %s", hex);
78 
79 	memset(&inak, 0, sizeof(inak));
80 	memcpy(inak.object_id, id->sha1, SHA1_DIGEST_LENGTH);
81 
82 	if (imsg_compose(ibuf, GOTD_IMSG_NAK, peerid, pid, -1,
83 	    &inak, sizeof(inak)) == -1) {
84 		err = got_error_from_errno("imsg_compose NAK");
85 		goto done;
86 	}
87 
88 	err = gotd_imsg_flush(ibuf);
89 done:
90 	if (err)
91 		log_warnx("sending NAK: %s", err->msg);
92 }