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negotiate() function extracted from vpnkit

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From:
    https://github.com/moby/vpnkit
    commit 2ffc1dd8a84ea7359dd09b1f4b51bb728d4f46a0
    c/vpnkit-tap-vsockd/tap-vsockd.c

With minimum changes to make it build.
This commit is contained in:
YAMAMOTO Takashi 2020-03-19 12:26:28 +09:00 committed by Xiang Xiao
parent b748fcde0a
commit 4062727333
1 changed files with 58 additions and 0 deletions
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58
arch/sim/src/sim/vpnkit/negotiate.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "protocol.h"
#define ERROR(fmt, ...) \
fprintf(stderr, "up_vpnkit: " fmt "\r\n", ##__VA_ARGS__)
#define INFO(fmt, ...) \
fprintf(stderr, "up_vpnkit: " fmt "\r\n", ##__VA_ARGS__)
/* Negotiate a vmnet connection, returns 0 on success and 1 on error. */
int negotiate(int fd, struct vif_info *vif)
{
enum command command = ethernet;
struct init_message *me;
struct ethernet_args args;
struct init_message you;
char *txt;
me = create_init_message();
if (!me)
goto err;
if (write_init_message(fd, me) == -1)
goto err;
if (read_init_message(fd, &you) == -1)
goto err;
if (me->version != you.version) {
ERROR("Server did not accept our protocol version (client: %d, server: %d)", me->version, you.version);
goto err;
}
txt = print_init_message(&you);
if (!txt)
goto err;
INFO("Server reports %s", txt);
free(txt);
if (write_command(fd, &command) == -1)
goto err;
/* We don't need a uuid */
memset(&args.uuid_string[0], 0, sizeof(args.uuid_string));
if (write_ethernet_args(fd, &args) == -1)
goto err;
if (read_vif_response(fd, vif) == -1)
goto err;
return 0;
err:
ERROR("Failed to negotiate vmnet connection");
return 1;
}