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Retry creating passive_socket of error

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Maschell 2022-10-06 17:47:30 +02:00
parent 0968810796
commit 5da7be81b7
1 changed files with 26 additions and 11 deletions
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23
src/ftp.c
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@ -325,18 +325,33 @@ static int32_t ftp_SIZE(client_t *client, char *path) {
static int32_t ftp_PASV(client_t *client, char *rest UNUSED) { static int32_t ftp_PASV(client_t *client, char *rest UNUSED) {
close_passive_socket(client); close_passive_socket(client);
int32_t result;
struct sockaddr_in bindAddress;
while (passive_port < 5000) {
client->passive_socket = network_socket(AF_INET, SOCK_STREAM, IPPROTO_IP); client->passive_socket = network_socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (client->passive_socket < 0) { if (client->passive_socket < 0) {
return write_reply(client, 520, "Unable to create listening socket."); return write_reply(client, 520, "Unable to create listening socket.");
} }
set_blocking(client->passive_socket, false); set_blocking(client->passive_socket, false);
struct sockaddr_in bindAddress;
memset(&bindAddress, 0, sizeof(bindAddress)); memset(&bindAddress, 0, sizeof(bindAddress));
bindAddress.sin_family = AF_INET; bindAddress.sin_family = AF_INET;
bindAddress.sin_port = htons(passive_port++); // XXX: BUG: This will overflow eventually, with interesting results... bindAddress.sin_port = htons(passive_port); // XXX: BUG: This will overflow eventually, with interesting results...
bindAddress.sin_addr.s_addr = htonl(INADDR_ANY); bindAddress.sin_addr.s_addr = htonl(INADDR_ANY);
int32_t result;
if ((result = network_bind(client->passive_socket, (struct sockaddr *) &bindAddress, sizeof(bindAddress))) < 0) { passive_port++;
if ((result = network_bind(client->passive_socket, (struct sockaddr *) &bindAddress, sizeof(bindAddress))) >= 0) {
break;
} else {
close_passive_socket(client);
}
}
if (passive_port >= 5000) {
passive_port = 1024;
}
if (result < 0) {
close_passive_socket(client); close_passive_socket(client);
return write_reply(client, 520, "Unable to bind listening socket."); return write_reply(client, 520, "Unable to bind listening socket.");
} }