diff options
Diffstat (limited to 'socket_bind.c')
-rw-r--r-- | socket_bind.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/socket_bind.c b/socket_bind.c new file mode 100644 index 0000000..b942e20 --- /dev/null +++ b/socket_bind.c @@ -0,0 +1,79 @@ +#include <sys/types.h> +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include "byte.h" +#include "socket_if.h" +#include "ip.h" + +/** + @file socket_bind.c + @author djb, fefe, feh + @source qmail, djbdns, ucspi-tcp6 + @brief binding a socket to a local resource +*/ + +int socket_bind4(int s,const char ip[4],uint16 port) +{ + struct sockaddr_in sa; + + byte_zero(&sa,sizeof(sa)); + sa.sin_family = AF_INET; + uint16_pack_big((char *)&sa.sin_port,port); + byte_copy((char *)&sa.sin_addr,4,ip); + + return bind(s,(struct sockaddr *)&sa,sizeof(sa)); +} + +int socket_bind4_reuse(int s,const char ip[4],uint16 port) +{ + int opt = 1; + setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt)); + return socket_bind4(s,ip,port); +} + +/* seems not to be used here -- djbdns requires it */ +void socket_tryreservein(int s,int size) +{ + while (size >= 1024) { + if (setsockopt(s,SOL_SOCKET,SO_RCVBUF,&size,sizeof(size)) == 0) return; + size -= (size >> 5); + } +} + +int socket_bind6(int s,const char ip[16],uint16 port,uint32 scope_id) +{ + struct sockaddr_in6 sa; + + byte_zero(&sa,sizeof(sa)); + sa.sin6_family = AF_INET6; + uint16_pack_big((char *)&sa.sin6_port,port); +/* implicit: sa.sin6_flowinfo = 0; */ + byte_copy((char *)&sa.sin6_addr,16,ip); + sa.sin6_scope_id = scope_id; + + return bind(s,(struct sockaddr *)&sa,sizeof(sa)); +} + +int socket_bind6_reuse(int s,const char ip[16],uint16 port,uint32 scope_id) +{ + int opt = 1; + setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt)); + return socket_bind6(s,ip,port,scope_id); +} + +int socket_bind(int s,const char ip[16],uint16 port,uint32 scope_id) +{ + if (ip6_isv4mapped(ip)) + return socket_bind4(s,ip + 12,port); + + return socket_bind6(s,ip,port,scope_id); +} + +int socket_bind_reuse(int s,const char ip[16],uint16 port,uint32 scope_id) +{ + if (ip6_isv4mapped(ip)) + return socket_bind4_reuse(s,ip + 12,port); + + return socket_bind6_reuse(s,ip,port,scope_id); +} |