diff options
Diffstat (limited to 'net/socketbind/files/socketbind.c')
| -rw-r--r-- | net/socketbind/files/socketbind.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/net/socketbind/files/socketbind.c b/net/socketbind/files/socketbind.c new file mode 100644 index 000000000000..51d929d9b794 --- /dev/null +++ b/net/socketbind/files/socketbind.c @@ -0,0 +1,46 @@ +#include <stdlib.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <dlfcn.h> + +static void *socket_p, *dl_handle; + +static struct sockaddr_in bind_addr; +static int do_bind; + +int socket(int domain, int type, int protocol) { + auto int res; + if (dl_handle == NULL) { + char *str; + dl_handle = dlopen("/usr/lib/libc.so", RTLD_LAZY); + if (dl_handle == NULL) + return -1; + socket_p = dlsym(dl_handle, "socket"); + if (!socket_p) + return -1; +#ifdef DEBUG + printf("Loaded socket %x\n", socket_p); +#endif + + if ((str = getenv("BINDTO")) != NULL) { +#ifdef DEBUG + printf("Thinking about bind\n"); +#endif + if (ascii2addr(AF_INET, str, &bind_addr.sin_addr)) { + do_bind = 1; + bind_addr.sin_len = INET_ADDRSTRLEN; + bind_addr.sin_family = AF_INET; +#ifdef DEBUG + printf("WILL DO BIND %s, %x\n", str, bind_addr.sin_addr.s_addr); +#endif + } + } + } + res = ((int(*)(int a, int b, int c))socket_p)(domain, type, protocol); + if (do_bind) { + bind(res, (struct sockaddr*)&bind_addr, INET_ADDRSTRLEN); + } + return res; +}; + |