rest: allow repository to have more than one IP address

Repository can have more than one single IP address.

* Add alias field to database to represent the extra IPs that are attached to
  the repository, update schema and add version 9.
* Use og_dbi_get_repository_ip() to infer the repository IP address.
* Add helper functions (src/repo.c) to build a list of repositories and update
  rest API to use it.

1 files changed, 141 insertions, 0 deletions

diff --git a/src/repo.c b/src/repo.c
new file mode 100644
index 0000000..d2b55cb
--- /dev/null
+++ b/src/repo.c
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2020-2021 Soleta Networks <info@soleta.eu>
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdint.h>
+#include <syslog.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include "cfg.h"
+#include "list.h"
+#include "repo.h"
+#include "dbi.h"
+
+static struct og_repo *og_repo_alloc(uint32_t id, const char *name,
+				     struct in_addr *addr)
+{
+	struct og_repo *repo;
+
+	repo = calloc(1, sizeof(struct og_repo));
+	if (!repo)
+		return NULL;
+
+	repo->name = strdup(name);
+	repo->id = id;
+	repo->addr[0] = *addr;
+	repo->num_ips++;
+
+	return repo;
+}
+
+static int og_repo_add_ip(struct og_repo *repo, struct in_addr *addr)
+{
+	if (repo->num_ips > OG_ADDR_REPO_MAX)
+		return -1;
+
+	repo->addr[repo->num_ips++] = *addr;
+
+	return 0;
+}
+
+static struct og_repo *og_repo_find(uint32_t id, struct list_head *repo_list)
+{
+	struct og_repo *repo;
+
+	list_for_each_entry(repo, repo_list, list) {
+		if (repo->id == id)
+			return repo;
+	}
+
+	return NULL;
+}
+
+int og_repo_list(struct list_head *repo_list)
+{
+	const char *name, *ip;
+	struct og_repo *repo;
+	struct in_addr addr;
+	const char *msglog;
+	struct og_dbi *dbi;
+	uint32_t id, alias;
+	dbi_result result;
+
+	dbi = og_dbi_open(&ogconfig.db);
+	if (!dbi) {
+		syslog(LOG_ERR, "cannot open connection database (%s:%d)\n",
+		       __func__, __LINE__);
+		return -1;
+	}
+
+	result = dbi_conn_queryf(dbi->conn,
+				 "SELECT idrepositorio, ip, nombrerepositorio, alias "
+				 "FROM repositorios");
+	if (!result) {
+		dbi_conn_error(dbi->conn, &msglog);
+		syslog(LOG_ERR, "failed to query database (%s:%d) %s\n",
+		       __func__, __LINE__, msglog);
+		og_dbi_close(dbi);
+		return -1;
+	}
+
+	while (dbi_result_next_row(result)) {
+		id = dbi_result_get_ulonglong(result, "idrepositorio");
+		ip = dbi_result_get_string(result, "ip");
+		name = dbi_result_get_string(result, "nombrerepositorio");
+		alias = dbi_result_get_ulonglong(result, "alias");
+
+		if (inet_aton(ip, &addr) < 0) {
+			syslog(LOG_ERR, "malformed IP in repo %s\n", name);
+			goto err_repo_list;
+		}
+
+		if (alias)
+			id = alias;
+
+		repo = og_repo_find(id, repo_list);
+		if (repo) {
+			if (og_repo_add_ip(repo, &addr) < 0) {
+				syslog(LOG_ERR, "too many IPs in repo %s\n",
+				       repo->name);
+				goto err_repo_list;
+			}
+			continue;
+		}
+
+		repo = og_repo_alloc(id, name, &addr);
+		if (!repo)
+			goto err_repo_list;
+
+		list_add_tail(&repo->list, repo_list);
+	}
+
+	dbi_result_free(result);
+	og_dbi_close(dbi);
+
+	return 0;
+
+err_repo_list:
+	og_repo_free_list(repo_list);
+	dbi_result_free(result);
+	og_dbi_close(dbi);
+
+	return -1;
+}
+
+void og_repo_free_list(struct list_head *repo_list)
+{
+	struct og_repo *repo, *next;
+
+	list_for_each_entry_safe(repo, next, repo_list, list) {
+		list_del(&repo->list);
+		free((void *)repo->name);
+		free(repo);
+	}
+}