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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/bpf/network_helpers.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/bpf/network_helpers.c')
-rw-r--r-- | tools/testing/selftests/bpf/network_helpers.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c new file mode 100644 index 000000000..12ee40284 --- /dev/null +++ b/tools/testing/selftests/bpf/network_helpers.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <errno.h> +#include <stdbool.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <arpa/inet.h> + +#include <linux/err.h> +#include <linux/in.h> +#include <linux/in6.h> + +#include "bpf_util.h" +#include "network_helpers.h" + +#define clean_errno() (errno == 0 ? "None" : strerror(errno)) +#define log_err(MSG, ...) ({ \ + int __save = errno; \ + fprintf(stderr, "(%s:%d: errno: %s) " MSG "\n", \ + __FILE__, __LINE__, clean_errno(), \ + ##__VA_ARGS__); \ + errno = __save; \ +}) + +struct ipv4_packet pkt_v4 = { + .eth.h_proto = __bpf_constant_htons(ETH_P_IP), + .iph.ihl = 5, + .iph.protocol = IPPROTO_TCP, + .iph.tot_len = __bpf_constant_htons(MAGIC_BYTES), + .tcp.urg_ptr = 123, + .tcp.doff = 5, +}; + +struct ipv6_packet pkt_v6 = { + .eth.h_proto = __bpf_constant_htons(ETH_P_IPV6), + .iph.nexthdr = IPPROTO_TCP, + .iph.payload_len = __bpf_constant_htons(MAGIC_BYTES), + .tcp.urg_ptr = 123, + .tcp.doff = 5, +}; + +static int settimeo(int fd, int timeout_ms) +{ + struct timeval timeout = { .tv_sec = 3 }; + + if (timeout_ms > 0) { + timeout.tv_sec = timeout_ms / 1000; + timeout.tv_usec = (timeout_ms % 1000) * 1000; + } + + if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, + sizeof(timeout))) { + log_err("Failed to set SO_RCVTIMEO"); + return -1; + } + + if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &timeout, + sizeof(timeout))) { + log_err("Failed to set SO_SNDTIMEO"); + return -1; + } + + return 0; +} + +#define save_errno_close(fd) ({ int __save = errno; close(fd); errno = __save; }) + +int start_server(int family, int type, const char *addr_str, __u16 port, + int timeout_ms) +{ + struct sockaddr_storage addr = {}; + socklen_t len; + int fd; + + if (make_sockaddr(family, addr_str, port, &addr, &len)) + return -1; + + fd = socket(family, type, 0); + if (fd < 0) { + log_err("Failed to create server socket"); + return -1; + } + + if (settimeo(fd, timeout_ms)) + goto error_close; + + if (bind(fd, (const struct sockaddr *)&addr, len) < 0) { + log_err("Failed to bind socket"); + goto error_close; + } + + if (type == SOCK_STREAM) { + if (listen(fd, 1) < 0) { + log_err("Failed to listed on socket"); + goto error_close; + } + } + + return fd; + +error_close: + save_errno_close(fd); + return -1; +} + +int fastopen_connect(int server_fd, const char *data, unsigned int data_len, + int timeout_ms) +{ + struct sockaddr_storage addr; + socklen_t addrlen = sizeof(addr); + struct sockaddr_in *addr_in; + int fd, ret; + + if (getsockname(server_fd, (struct sockaddr *)&addr, &addrlen)) { + log_err("Failed to get server addr"); + return -1; + } + + addr_in = (struct sockaddr_in *)&addr; + fd = socket(addr_in->sin_family, SOCK_STREAM, 0); + if (fd < 0) { + log_err("Failed to create client socket"); + return -1; + } + + if (settimeo(fd, timeout_ms)) + goto error_close; + + ret = sendto(fd, data, data_len, MSG_FASTOPEN, (struct sockaddr *)&addr, + addrlen); + if (ret != data_len) { + log_err("sendto(data, %u) != %d\n", data_len, ret); + goto error_close; + } + + return fd; + +error_close: + save_errno_close(fd); + return -1; +} + +static int connect_fd_to_addr(int fd, + const struct sockaddr_storage *addr, + socklen_t addrlen) +{ + if (connect(fd, (const struct sockaddr *)addr, addrlen)) { + log_err("Failed to connect to server"); + return -1; + } + + return 0; +} + +int connect_to_fd(int server_fd, int timeout_ms) +{ + struct sockaddr_storage addr; + struct sockaddr_in *addr_in; + socklen_t addrlen, optlen; + int fd, type; + + optlen = sizeof(type); + if (getsockopt(server_fd, SOL_SOCKET, SO_TYPE, &type, &optlen)) { + log_err("getsockopt(SOL_TYPE)"); + return -1; + } + + addrlen = sizeof(addr); + if (getsockname(server_fd, (struct sockaddr *)&addr, &addrlen)) { + log_err("Failed to get server addr"); + return -1; + } + + addr_in = (struct sockaddr_in *)&addr; + fd = socket(addr_in->sin_family, type, 0); + if (fd < 0) { + log_err("Failed to create client socket"); + return -1; + } + + if (settimeo(fd, timeout_ms)) + goto error_close; + + if (connect_fd_to_addr(fd, &addr, addrlen)) + goto error_close; + + return fd; + +error_close: + save_errno_close(fd); + return -1; +} + +int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms) +{ + struct sockaddr_storage addr; + socklen_t len = sizeof(addr); + + if (settimeo(client_fd, timeout_ms)) + return -1; + + if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) { + log_err("Failed to get server addr"); + return -1; + } + + if (connect_fd_to_addr(client_fd, &addr, len)) + return -1; + + return 0; +} + +int make_sockaddr(int family, const char *addr_str, __u16 port, + struct sockaddr_storage *addr, socklen_t *len) +{ + if (family == AF_INET) { + struct sockaddr_in *sin = (void *)addr; + + sin->sin_family = AF_INET; + sin->sin_port = htons(port); + if (addr_str && + inet_pton(AF_INET, addr_str, &sin->sin_addr) != 1) { + log_err("inet_pton(AF_INET, %s)", addr_str); + return -1; + } + if (len) + *len = sizeof(*sin); + return 0; + } else if (family == AF_INET6) { + struct sockaddr_in6 *sin6 = (void *)addr; + + sin6->sin6_family = AF_INET6; + sin6->sin6_port = htons(port); + if (addr_str && + inet_pton(AF_INET6, addr_str, &sin6->sin6_addr) != 1) { + log_err("inet_pton(AF_INET6, %s)", addr_str); + return -1; + } + if (len) + *len = sizeof(*sin6); + return 0; + } + return -1; +} |