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Diffstat (limited to '')
| -rw-r--r-- | lib/sockopt.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/lib/sockopt.h b/lib/sockopt.h new file mode 100644 index 0000000..ce7d665 --- /dev/null +++ b/lib/sockopt.h @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Router advertisement + * Copyright (C) 1999 Kunihiro Ishiguro + */ + +#ifndef _ZEBRA_SOCKOPT_H +#define _ZEBRA_SOCKOPT_H + +#include "sockunion.h" + +#ifdef __cplusplus +extern "C" { +#endif + +extern void setsockopt_so_recvbuf(int sock, int size); +extern void setsockopt_so_sendbuf(const int sock, int size); +extern int getsockopt_so_sendbuf(const int sock); +extern int getsockopt_so_recvbuf(const int sock); + +extern int setsockopt_ipv6_pktinfo(int, int); +extern int setsockopt_ipv6_multicast_hops(int, int); +extern int setsockopt_ipv6_unicast_hops(int, int); +extern int setsockopt_ipv6_hoplimit(int, int); +extern int setsockopt_ipv6_multicast_loop(int, int); +extern int setsockopt_ipv6_tclass(int, int); + +#define SOPT_SIZE_CMSG_PKTINFO_IPV6() (sizeof(struct in6_pktinfo)); + +/* + * Size defines for control messages used to get ifindex. We define + * values for each method, and define a macro that can be used by code + * that is unaware of which method is in use. + * These values are without any alignment needed (see CMSG_SPACE in RFC3542). + */ +#if defined(IP_PKTINFO) +/* Linux in_pktinfo. */ +#define SOPT_SIZE_CMSG_PKTINFO_IPV4() (CMSG_SPACE(sizeof(struct in_pktinfo))) +/* XXX This should perhaps be defined even if IP_PKTINFO is not. */ +#define SOPT_SIZE_CMSG_PKTINFO(af) \ + ((af == AF_INET) ? SOPT_SIZE_CMSG_PKTINFO_IPV4() \ + : SOPT_SIZE_CMSG_PKTINFO_IPV6() +#endif /* IP_PKTINFO */ + +#if defined(IP_RECVIF) +/* BSD/Solaris */ + +#define SOPT_SIZE_CMSG_RECVIF_IPV4() (sizeof(struct sockaddr_dl)) +#endif /* IP_RECVIF */ + +/* SOPT_SIZE_CMSG_IFINDEX_IPV4 - portable type */ +#if defined(SOPT_SIZE_CMSG_PKTINFO) +#define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_PKTINFO_IPV4() +#elif defined(SOPT_SIZE_CMSG_RECVIF_IPV4) +#define SOPT_SIZE_CMSG_IFINDEX_IPV4() SOPT_SIZE_CMSG_RECVIF_IPV4() +#else /* Nothing available */ +#define SOPT_SIZE_CMSG_IFINDEX_IPV4() (sizeof(char *)) +#endif /* SOPT_SIZE_CMSG_IFINDEX_IPV4 */ + +#define SOPT_SIZE_CMSG_IFINDEX(af) \ + (((af) == AF_INET) : SOPT_SIZE_CMSG_IFINDEX_IPV4() \ + ? SOPT_SIZE_CMSG_PKTINFO_IPV6()) + +extern int setsockopt_ipv4_multicast_if(int sock, struct in_addr if_addr, + ifindex_t ifindex); +extern int setsockopt_ipv4_multicast(int sock, int optname, + struct in_addr if_addr, + unsigned int mcast_addr, + ifindex_t ifindex); +extern int setsockopt_ipv4_multicast_loop(int sock, uint8_t val); + +extern int setsockopt_ipv4_tos(int sock, int tos); + +/* Ask for, and get, ifindex, by whatever method is supported. */ +extern int setsockopt_ifindex(int, int, ifindex_t); +extern ifindex_t getsockopt_ifindex(int, struct msghdr *); + +/* swab the fields in iph between the host order and system order expected + * for IP_HDRINCL. + */ +extern void sockopt_iphdrincl_swab_htosys(struct ip *iph); +extern void sockopt_iphdrincl_swab_systoh(struct ip *iph); + +extern int sockopt_tcp_rtt(int); + +/* + * TCP MD5 signature option. This option allows TCP MD5 to be enabled on + * addresses. + * + * sock + * Socket to enable option on. + * + * su + * Sockunion specifying address to enable option on. + * + * password + * MD5 auth password + */ +extern int sockopt_tcp_signature(int sock, union sockunion *su, + const char *password); + +/* + * Extended TCP MD5 signature option. This option allows TCP MD5 to be enabled + * on prefixes. + * + * sock + * Socket to enable option on. + * + * su + * Sockunion specifying address (or prefix) to enable option on. + * + * prefixlen + * 0 - su is an address; fall back to non-extended mode + * Else - su is a prefix; prefixlen is the mask length + * + * password + * MD5 auth password + */ +extern int sockopt_tcp_signature_ext(int sock, union sockunion *su, + uint16_t prefixlen, const char *password); + +/* + * set TCP max segment size. This option allows user to configure + * max segment size for TCP session + * + * sock + * Socket to enable option on. + * + * tcp_maxseg + * value used for TCP segment size negotiation during SYN + */ +extern int sockopt_tcp_mss_set(int sock, int tcp_maxseg); + +/* + * get TCP max segment size. This option allows user to get + * the segment size for TCP session + * + * sock + * Socket to get max segement size. + */ +extern int sockopt_tcp_mss_get(int sock); + +/* + * Configure TCP keepalive for a given socket + * + * sock + * Socket to enable keepalive option on. + * + * keepalive_idle + * number of seconds a connection needs to be idle + * before sending out keep-alive proves + * + * keepalive_intvl + * number of seconds between TCP keep-alive probes + * + * keepalive_probes + * max number of probers to send before giving up + * and killing tcp connection + */ +extern int setsockopt_tcp_keepalive(int sock, uint16_t keepalive_idle, + uint16_t keepalive_intvl, + uint16_t keepalive_probes); + +#ifdef __cplusplus +} +#endif + +#endif /*_ZEBRA_SOCKOPT_H */ |