selftests/bpf/network_helpers.h

1 /* SPDX-License-Identifier: GPL-2.0 */
31 	/* +ve: Passed to listen() as-is.
35 	 *      Most tests only have one on-going connection.
36 	 * -ve: It is changed to 0 before passing to listen().
94  * open_netns() - Switch to specified network namespace by name.
106  * append_tid() - Append thread ID to the given string.
113  * Returns -1 on errors, 0 otherwise
142 	iph->check = 0;  in build_ip_csum()
144 	sum = csum_partial(p, iph->ihl << 2, 0);  in build_ip_csum()
150  * csum_tcpudp_magic - compute IP pseudo-header checksum
152  * Compute the IPv4 pseudo header checksum. The helper can take a
180  * csum_ipv6_magic - compute IPv6 pseudo-header checksum
182  * Compute the ipv6 pseudo header checksum. The helper can take a
203 		s += (__u32)saddr->s6_addr32[i];  in csum_ipv6_magic()
205 		s += (__u32)daddr->s6_addr32[i];  in csum_ipv6_magic()
214  * build_udp_v4_csum - compute UDP checksum for UDP over IPv4
216  * Compute the checksum to embed in UDP header, composed of the sum of IP
217  * pseudo-header checksum, UDP header checksum and UDP data checksum
229 	sum = csum_partial(udph, ntohs(udph->len), 0);  in build_udp_v4_csum()
230 	return csum_tcpudp_magic(iph->saddr, iph->daddr, ntohs(udph->len),  in build_udp_v4_csum()
235  * build_udp_v6_csum - compute UDP checksum for UDP over IPv6
237  * Compute the checksum to embed in UDP header, composed of the sum of IPv6
238  * pseudo-header checksum, UDP header checksum and UDP data checksum
249 	sum = csum_partial(udph, ntohs(udph->len), 0);  in build_udp_v6_csum()
250 	return csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, ntohs(udph->len),  in build_udp_v6_csum()