diff options
Diffstat (limited to 'x11vnc/inet.c')
| -rw-r--r-- | x11vnc/inet.c | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/x11vnc/inet.c b/x11vnc/inet.c index 6a3921b..c4433a9 100644 --- a/x11vnc/inet.c +++ b/x11vnc/inet.c @@ -17,7 +17,7 @@ char *get_remote_host(int sock); char *get_local_host(int sock); char *ident_username(rfbClientPtr client); int find_free_port(int start, int end); - +int have_ssh_env(void); static int get_port(int sock, int remote); static char *get_host(int sock, int remote); @@ -314,3 +314,54 @@ int find_free_port(int start, int end) { return 0; } +int have_ssh_env(void) { + char *str, *p = getenv("SSH_CONNECTION"); + char *rhost, *rport, *lhost, *lport; + + if (! p) return 0; + + str = strdup(p); + + p = strtok(str, " "); + rhost = p; + + p = strtok(NULL, " "); + if (! p) goto fail; + + rport = p; + + p = strtok(NULL, " "); + if (! p) goto fail; + + lhost = p; + + p = strtok(NULL, " "); + if (! p) goto fail; + + lport = p; + +if (0) fprintf(stderr, "%d/%d - '%s' '%s'\n", atoi(rport), atoi(lport), rhost, lhost); + + if (atoi(rport) < 0 || atoi(rport) > 65535) { + goto fail; + } + if (atoi(lport) < 0 || atoi(lport) > 65535) { + goto fail; + } + + if (!strcmp(rhost, lhost)) { + goto fail; + } + + free(str); + + return 1; + + fail: +fprintf(stderr, "failed:\n"); + + free(str); + + return 0; +} + |