feat(lib/net): network library implemented

1 files changed, 67 insertions, 0 deletions

diff --git a/lib/net/common.c b/lib/net/common.c
new file mode 100644
index 0000000..f85a564
--- /dev/null
+++ b/lib/net/common.c
@@ -0,0 +1,67 @@
+#include "./common.h"
+#include <netdb.h>
+#include <netinet/in.h>
+#include <stdlib.h>
+#include <string.h>
+
+const uint32_t TCPALIVE_IDLE_TIME = 30;
+const uint32_t TCPALIVE_CHECK_INTVL = 10;
+const uint32_t TCPALIVE_CHECK_CNT = 5;
+
+struct sockaddr_in* get_addr(const char* addr, const char* port) {
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = AF_INET;
+    hints.ai_socktype = SOCK_STREAM;
+    hints.ai_flags = 0;
+    hints.ai_protocol = 0;
+
+    struct addrinfo* res;
+    if (getaddrinfo(addr, port, &hints, &res) != 0) {
+        fprintf(stderr, "[client_create_socket] Unable to call getaddrinfo()\n");
+        exit(EXIT_FAILURE);
+    }
+
+    if (res->ai_next != NULL) {
+        fprintf(stderr, "[client_create_socket] Ambigous result of getaddrinfo()\n");
+        exit(EXIT_FAILURE);
+    }
+
+    struct sockaddr_in* result = calloc(1, sizeof(*result));
+    memcpy(result, res->ai_addr, sizeof(*res->ai_addr));
+
+    freeaddrinfo(res);
+
+    return result;
+}
+
+void conn_close(conn_t* conn) {
+    if (close(conn->conn_socket_fd) == -1) {
+        fprintf(stderr, "[conn_close] Unable to close connection socket\n");
+        exit(EXIT_FAILURE);
+    }
+}
+
+int conn_configure_tcpalive(conn_t* conn) {
+    int setsockopt_arg = 1;
+    if (setsockopt(conn->conn_socket_fd, SOL_SOCKET, SO_KEEPALIVE, &setsockopt_arg, sizeof(setsockopt_arg)) == -1) {
+        return -1;
+    }
+
+    setsockopt_arg = TCPALIVE_IDLE_TIME;
+    if (setsockopt(conn->conn_socket_fd, IPPROTO_TCP, TCP_KEEPIDLE, &setsockopt_arg, sizeof(setsockopt_arg)) == -1) {
+        return -1;
+    }
+
+    setsockopt_arg = TCPALIVE_CHECK_INTVL;
+    if (setsockopt(conn->conn_socket_fd, IPPROTO_TCP, TCP_KEEPINTVL, &setsockopt_arg, sizeof(setsockopt_arg)) == -1) {
+        return -1;
+    }
+
+    setsockopt_arg = TCPALIVE_CHECK_CNT;
+    if (setsockopt(conn->conn_socket_fd, IPPROTO_TCP, TCP_KEEPCNT, &setsockopt_arg, sizeof(setsockopt_arg)) == -1) {
+        return -1;
+    }
+
+    return 1;
+}