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#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "forward.h"
#include "log.h"
int fwd_init_ctx(forward_ctx **ctx, init_cb init_fn)
{
assert(ctx || init_fn);
if (!*ctx)
*ctx = (forward_ctx *) malloc(sizeof(**ctx));
assert(*ctx);
memset(*ctx, 0, sizeof(**ctx));
if (init_fn(*ctx))
return 1;
return 0;
}
int fwd_setup_client(forward_ctx *ctx, const char *host, const char *port)
{
int s;
struct addrinfo *fwd_addr = NULL;
assert(ctx);
ctx->fwd_type = FT_CLIENT;
s = socket_init_in(host, port, &fwd_addr);
if (s) {
E_GAIERR(s, "Could not initialise client forward socket");
return 1;
}
if (!ctx->fwd_cbs.on_listen)
return 1;
if (ctx->fwd_cbs.on_listen(ctx, host, port))
return 1;
if (socket_connect_in(&ctx->sock, &fwd_addr)) {
E_STRERR("Connection to forward socket %s:%s", host, port);
return 1;
}
s = socket_addrtostr_in(&ctx->sock, ctx->host_buf, ctx->service_buf);
if (s) {
E_GAIERR(s, "Convert forward socket address to string");
return 1;
}
if (socket_close(&ctx->sock)) {
E_STRERR("Forward socket to %s:%s close",
ctx->host_buf, ctx->service_buf);
return 1;
}
return 0;
}
int fwd_setup_server(forward_ctx *ctx, const char *listen_addr,
const char *listen_port)
{
int s;
struct addrinfo *fwd_addr = NULL;
assert(ctx);
ctx->fwd_type = FT_SERVER;
s = socket_init_in(listen_addr, listen_port, &fwd_addr);
if (s) {
E_GAIERR(s, "Could not initialise server forward socket");
return 1;
}
if (socket_bind_in(&ctx->sock, &fwd_addr)) {
E_STRERR("Could not bind forward server socket to %s:%s",
listen_addr, listen_port);
return 1;
}
return 0;
}
int fwd_validate_ctx(const forward_ctx *ctx)
{
assert(ctx);
assert(ctx->fwd_type == FT_CLIENT ||
ctx->fwd_type == FT_SERVER);
assert(ctx->fwd_cbs.on_listen && ctx->fwd_cbs.on_shutdown);
assert(ctx->sock.addr_len > 0);
assert(strnlen(ctx->host_buf, NI_MAXHOST) > 0);
assert(strnlen(ctx->service_buf, NI_MAXSERV) > 0);
return 0;
}
int fwd_connect_sock(forward_ctx *ctx, psocket *fwd_client)
{
psocket *dst;
assert(ctx);
assert(ctx->fwd_type == FT_CLIENT);
if (fwd_client) {
dst = fwd_client;
socket_clone(&ctx->sock, fwd_client);
} else {
dst = &ctx->sock;
}
return socket_reconnect_in(dst);
}
int fwd_listen_sock(forward_ctx *ctx, psocket *fwd_server)
{
psocket *dst;
assert(ctx);
assert(ctx->fwd_type == FT_SERVER);
if (fwd_server) {
dst = fwd_server;
socket_clone(&ctx->sock, fwd_server);
} else {
dst = &ctx->sock;
}
if (socket_listen_in(dst)) {
E_STRERR("Could not listen on forward server socket on %s:%s",
ctx->host_buf, ctx->service_buf);
return 1;
}
return 0;
}
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