From 9b3caf1f841cf451ba162bcaf83a96ba0c834a78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= <anton@sijanec.eu>
Date: Sun, 8 Jan 2023 23:48:11 +0100
Subject: downloading metadata over tcp works, asan reports a memory leak about
 nodes

---
 src/tcp.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/tcp.c

(limited to 'src/tcp.c')

diff --git a/src/tcp.c b/src/tcp.c
new file mode 100644
index 0000000..99f8828
--- /dev/null
+++ b/src/tcp.c
@@ -0,0 +1,62 @@
+void disconnection (struct torrent * t) {
+	fprintf(stderr, "disconnecting from peer ");
+	peer_print(stderr, t->dl);
+	fprintf(stderr, " nfds=%ld, pollfds=%zu\n", *t->dht->nfds, *t->dht->pollfds_size);
+	for (size_t i = 0; i < *t->dht->nfds; i++) {
+		if ((*t->dht->pollfds)[i].fd == t->socket) {
+			if (i != (*t->dht->nfds)--)
+				(*t->dht->pollfds)[i] = (*t->dht->pollfds)[*t->dht->nfds];
+			break;
+		}
+	}
+	if (t->dl->flags & goodmeta) {
+		char buf[128];
+		bin2hex(buf, t->hash, 20);
+		strcpy(buf+40, ".torrent");
+		FILE * f = fopen(buf, "w+b");
+		if (!f) {
+			L(user, t->dht, "fopen(%s, \"w+b\"): %s", buf, strerror(errno));
+			return;
+		}
+		char remote[INET6_ADDRSTRLEN + 64];
+		if (!inet_ntop(t->dl->addr.sin6_family, t->dl->addr.sin6_addr.s6_addr, remote, INET6_ADDRSTRLEN+7))
+			snprintf(remote, sizeof remote,  "(inet_ntop: %s)", strerror(errno));
+		sprintf(remote+strlen(remote), "/%d", ntohs(t->dl->addr.sin6_port));
+		fprintf(f, "d10:created by58:http://ni.šijanec.eu/sijanec/travnik mailto:tk@sijanec.eu13:creation datei%lde8:encoding5:UTF-84:info", time(NULL));
+		fwrite(t->metadata, 1, t->size, f); // i don't expect any errors here
+		fprintf(f, "6:sourced2:ip%zu:%s", strlen(remote), remote);
+		if (t->software)
+			fprintf(f, "1:v%zu:%s", strlen(t->software), t->software);
+		fputs("ee", f);
+		if (fclose(f) == EOF)
+			L(user, t->dht, "fclose(%s): %s", buf, strerror(errno));
+	}
+#ifdef DISCONNECTION_MIXIN_BOTTOM
+	DISCONNECTION_MIXIN_BOTTOM
+#endif
+}
+void intentions (struct torrent * t) {
+	for (size_t i = 0; i < *t->dht->nfds; i++)
+		if ((*t->dht->pollfds)[i].fd == t->socket) {
+			(*t->dht->pollfds)[i].events &= ~(POLLIN | POLLOUT);
+			if (t->state & incoming)
+				(*t->dht->pollfds)[i].events |= POLLIN;
+			if (t->state & outgoing)
+				(*t->dht->pollfds)[i].events |= POLLOUT;
+		}
+	fprintf(stderr, "peer's intentions: ");
+	peer_print(stderr, t->dl);
+	fprintf(stderr, " nfds=%ld, pollfds=%zu%s%s\n", *t->dht->nfds, *t->dht->pollfds_size, (t->state & incoming) ? " reading" : "", (t->state & outgoing) ? " writing" : "");
+}
+void connection (struct dht * d, struct torrent * t) {
+	if (*d->pollfds_size <= *d->nfds)
+		*d->pollfds = reallocarray(*d->pollfds, (*d->pollfds_size *= 2), sizeof **d->pollfds);
+	(*d->pollfds)[*d->nfds].events = POLLIN | POLLOUT;
+	(*d->pollfds)[(*d->nfds)++].fd = t->socket;
+	fprintf(stderr, "attempting to connect to peer ");
+	peer_print(stderr, t->dl);
+	fprintf(stderr, " nfds=%ld, pollfds=%zu\n", *d->nfds, *d->pollfds_size);
+	t->disconnection = disconnection;
+	t->dht = d;
+	t->intentions = intentions;
+}
-- 
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