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Fix UDP socket creation/cleanup if opening IPv6 socket fails

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Previously, the `net_udp_create` function returned whether the IPv6 socket in particular was created successfully. If an IPv4 socket or Websocket was created successfully before this, it was not used and also not closed properly, if the IPv6 socket could not be created.

Now, the `net_udp_create` function succeeds if the socket for at least one network type (IPv4, IPv6 or Websocket) could be created successfully.

Avoid reusing local variables and remove redundant comments. Also apply the same refactoring to `net_tcp_create`, which already has the behavior of succeeding if the socket for any network type (IPv4 or IPv6) was created successfully.
This commit is contained in:
Robert Müller 2024-08-11 15:15:45 +02:00
parent afd1bd9cde
commit 570c2c857a
1 changed files with 15 additions and 29 deletions
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44
src/base/system.cpp
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@ -1548,24 +1548,21 @@ NETSOCKET net_udp_create(NETADDR bindaddr)
{
NETSOCKET sock = (NETSOCKET_INTERNAL *)malloc(sizeof(*sock));
*sock = invalid_socket;
NETADDR tmpbindaddr = bindaddr;
int broadcast = 1;
int socket = -1;
if(bindaddr.type & NETTYPE_IPV4)
{
struct sockaddr_in addr;
/* bind, we should check for error */
NETADDR tmpbindaddr = bindaddr;
tmpbindaddr.type = NETTYPE_IPV4;
netaddr_to_sockaddr_in(&tmpbindaddr, &addr);
socket = priv_net_create_socket(AF_INET, SOCK_DGRAM, (struct sockaddr *)&addr, sizeof(addr));
int socket = priv_net_create_socket(AF_INET, SOCK_DGRAM, (struct sockaddr *)&addr, sizeof(addr));
if(socket >= 0)
{
sock->type |= NETTYPE_IPV4;
sock->ipv4sock = socket;
/* set broadcast */
int broadcast = 1;
if(setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (const char *)&broadcast, sizeof(broadcast)) != 0)
{
dbg_msg("socket", "Setting BROADCAST on ipv4 failed: %d", net_errno());
@ -1581,17 +1578,15 @@ NETSOCKET net_udp_create(NETADDR bindaddr)
}
}
}
#if defined(CONF_WEBSOCKETS)
if(bindaddr.type & NETTYPE_WEBSOCKET_IPV4)
{
char addr_str[NETADDR_MAXSTRSIZE];
/* bind, we should check for error */
NETADDR tmpbindaddr = bindaddr;
tmpbindaddr.type = NETTYPE_WEBSOCKET_IPV4;
net_addr_str(&tmpbindaddr, addr_str, sizeof(addr_str), 0);
socket = websocket_create(addr_str, tmpbindaddr.port);
int socket = websocket_create(addr_str, tmpbindaddr.port);
if(socket >= 0)
{
sock->type |= NETTYPE_WEBSOCKET_IPV4;
@ -1603,17 +1598,17 @@ NETSOCKET net_udp_create(NETADDR bindaddr)
if(bindaddr.type & NETTYPE_IPV6)
{
struct sockaddr_in6 addr;
/* bind, we should check for error */
NETADDR tmpbindaddr = bindaddr;
tmpbindaddr.type = NETTYPE_IPV6;
netaddr_to_sockaddr_in6(&tmpbindaddr, &addr);
socket = priv_net_create_socket(AF_INET6, SOCK_DGRAM, (struct sockaddr *)&addr, sizeof(addr));
int socket = priv_net_create_socket(AF_INET6, SOCK_DGRAM, (struct sockaddr *)&addr, sizeof(addr));
if(socket >= 0)
{
sock->type |= NETTYPE_IPV6;
sock->ipv6sock = socket;
/* set broadcast */
int broadcast = 1;
if(setsockopt(socket, SOL_SOCKET, SO_BROADCAST, (const char *)&broadcast, sizeof(broadcast)) != 0)
{
dbg_msg("socket", "Setting BROADCAST on ipv6 failed: %d", net_errno());
@ -1633,20 +1628,17 @@ NETSOCKET net_udp_create(NETADDR bindaddr)
}
}
if(socket < 0)
if(sock->type == NETTYPE_INVALID)
{
free(sock);
sock = nullptr;
}
else
{
/* set non-blocking */
net_set_non_blocking(sock);
net_buffer_init(&sock->buffer);
}
/* return */
return sock;
}
@ -1862,17 +1854,14 @@ NETSOCKET net_tcp_create(NETADDR bindaddr)
{
NETSOCKET sock = (NETSOCKET_INTERNAL *)malloc(sizeof(*sock));
*sock = invalid_socket;
NETADDR tmpbindaddr = bindaddr;
int socket4 = -1;
if(bindaddr.type & NETTYPE_IPV4)
{
struct sockaddr_in addr;
/* bind, we should check for error */
NETADDR tmpbindaddr = bindaddr;
tmpbindaddr.type = NETTYPE_IPV4;
netaddr_to_sockaddr_in(&tmpbindaddr, &addr);
socket4 = priv_net_create_socket(AF_INET, SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr));
int socket4 = priv_net_create_socket(AF_INET, SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr));
if(socket4 >= 0)
{
sock->type |= NETTYPE_IPV4;
@ -1880,15 +1869,13 @@ NETSOCKET net_tcp_create(NETADDR bindaddr)
}
}
int socket6 = -1;
if(bindaddr.type & NETTYPE_IPV6)
{
struct sockaddr_in6 addr;
/* bind, we should check for error */
NETADDR tmpbindaddr = bindaddr;
tmpbindaddr.type = NETTYPE_IPV6;
netaddr_to_sockaddr_in6(&tmpbindaddr, &addr);
socket6 = priv_net_create_socket(AF_INET6, SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr));
int socket6 = priv_net_create_socket(AF_INET6, SOCK_STREAM, (struct sockaddr *)&addr, sizeof(addr));
if(socket6 >= 0)
{
sock->type |= NETTYPE_IPV6;
@ -1896,13 +1883,12 @@ NETSOCKET net_tcp_create(NETADDR bindaddr)
}
}
if(socket4 < 0 && socket6 < 0)
if(sock->type == NETTYPE_INVALID)
{
free(sock);
sock = nullptr;
}
/* return */
return sock;
}