From 7a0e44998f426752c58975ae686d8e88aa131195 Mon Sep 17 00:00:00 2001
From: Uros Majstorovic <majstor@majstor.org>
Date: Sat, 11 May 2024 15:58:48 +0200
Subject: added error handler per connection type; improved handlers API and
 error reporting

---
 ecp/src/platform/posix/transport.c | 38 ++++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 16 deletions(-)

(limited to 'ecp/src/platform/posix')

diff --git a/ecp/src/platform/posix/transport.c b/ecp/src/platform/posix/transport.c
index 51f311a..71267a1 100644
--- a/ecp/src/platform/posix/transport.c
+++ b/ecp/src/platform/posix/transport.c
@@ -36,17 +36,17 @@ int ecp_tr_addr_set(ecp_tr_addr_t *addr, void *addr_s) {
     memset(addr_c, 0, sizeof(addr_c));
     strncpy(addr_c, addr_s, sizeof(addr_c)-1);
     colon = strchr(addr_c, ':');
-    if (colon == NULL) return -1;
+    if (colon == NULL) return ECP_ERR_ADDR;
     *colon = '\0';
     colon++;
-    if (*colon == '\0') return -1;
+    if (*colon == '\0') return ECP_ERR_ADDR;
     rv = inet_pton(AF_INET, addr_c, addr->host);
-    if (rv != 1) return -1;
+    if (rv != 1) return ECP_ERR_ADDR;
     hport = strtol(colon, &endptr, 10);
-    if (*endptr != '\0') return -1;
+    if (*endptr != '\0') return ECP_ERR_ADDR;
     addr->port = htons(hport);
 
-    return 0;
+    return ECP_OK;
 }
 
 int ecp_tr_open(ECPSocket *sock, ecp_tr_addr_t *addr) {
@@ -63,13 +63,14 @@ int ecp_tr_open(ECPSocket *sock, ecp_tr_addr_t *addr) {
         _myaddr.sin_port = htons(0);
     }
 
-    sock->sock = socket(PF_INET, SOCK_DGRAM, 0);
-    if (sock->sock < 0) return sock->sock;
+    rv = socket(PF_INET, SOCK_DGRAM, 0);
+    if (rv < 0) return ECP_ERR_OPEN;
 
+    sock->sock = rv;
     rv = bind(sock->sock, (struct sockaddr *)&_myaddr, sizeof(_myaddr));
     if (rv < 0) {
         close(sock->sock);
-        return rv;
+        return ECP_ERR_BIND;
     }
 
     return ECP_OK;
@@ -81,12 +82,16 @@ void ecp_tr_close(ECPSocket *sock) {
 
 ssize_t ecp_tr_send(ECPSocket *sock, ECPBuffer *packet, size_t pkt_size, ecp_tr_addr_t *addr, unsigned char flags) {
     struct sockaddr_in servaddr;
+    ssize_t rv;
 
     memset((void *)&servaddr, 0, sizeof(servaddr));
     servaddr.sin_family = AF_INET;
     servaddr.sin_port = addr->port;
     memcpy((void *)&servaddr.sin_addr, addr->host, sizeof(addr->host));
-    return sendto(sock->sock, packet->buffer, pkt_size, 0, (struct sockaddr *)&servaddr, sizeof(servaddr));
+    rv = sendto(sock->sock, packet->buffer, pkt_size, 0, (struct sockaddr *)&servaddr, sizeof(servaddr));
+    if (rv < 0) return ECP_ERR_SEND;
+
+    return rv;
 }
 
 ssize_t ecp_tr_recv(ECPSocket *sock, ECPBuffer *packet, ecp_tr_addr_t *addr, int timeout) {
@@ -95,20 +100,21 @@ ssize_t ecp_tr_recv(ECPSocket *sock, ECPBuffer *packet, ecp_tr_addr_t *addr, int
     struct pollfd fds[] = {
         {sock->sock, POLLIN, 0}
     };
-    int rv;
+    ssize_t rv;
+    int _rv;
 
-    rv = poll(fds, 1, timeout);
+    _rv = poll(fds, 1, timeout);
     memset((void *)&servaddr, 0, sizeof(servaddr));
-    if (rv == 1) {
-        ssize_t recvlen = recvfrom(sock->sock, packet->buffer, packet->size, 0, (struct sockaddr *)&servaddr, &addrlen);
-        if (recvlen < 0) return recvlen;
-        if (recvlen < ECP_MIN_PKT) return ECP_ERR_RECV;
+    if (_rv == 1) {
+        rv = recvfrom(sock->sock, packet->buffer, packet->size, 0, (struct sockaddr *)&servaddr, &addrlen);
+        if (rv < 0) return ECP_ERR_RECV;
+        if (rv < ECP_MIN_PKT) return ECP_ERR_RECV;
 
         if (addr) {
             addr->port = servaddr.sin_port;
             memcpy(addr->host, (void *)&servaddr.sin_addr, sizeof(addr->host));
         }
-        return recvlen;
+        return rv;
     }
 
     return ECP_ERR_TIMEOUT;
-- 
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