| Ravi Teja | ce1c96f | 2020-10-05 23:13:01 -0500 | [diff] [blame] | 1 | #include "utils.hpp" |
| 2 | |
| 3 | #include "libpldm/base.h" |
| 4 | |
| 5 | #include <sys/socket.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/un.h> |
| 8 | #include <unistd.h> |
| 9 | |
| 10 | #include <iostream> |
| 11 | |
| 12 | namespace pldm |
| 13 | { |
| 14 | namespace responder |
| 15 | { |
| 16 | namespace utils |
| 17 | { |
| 18 | |
| 19 | int setupUnixSocket(const std::string& socketInterface) |
| 20 | { |
| 21 | int sock; |
| 22 | struct sockaddr_un addr; |
| 23 | memset(&addr, 0, sizeof(addr)); |
| 24 | addr.sun_family = AF_UNIX; |
| 25 | if (strnlen(socketInterface.c_str(), sizeof(addr.sun_path)) == |
| 26 | sizeof(addr.sun_path)) |
| 27 | { |
| 28 | std::cerr << "setupUnixSocket: UNIX socket path too long" << std::endl; |
| 29 | return -1; |
| 30 | } |
| 31 | |
| 32 | strncpy(addr.sun_path, socketInterface.c_str(), sizeof(addr.sun_path) - 1); |
| 33 | |
| 34 | if ((sock = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0)) == -1) |
| 35 | { |
| 36 | std::cerr << "setupUnixSocket: socket() call failed" << std::endl; |
| 37 | return -1; |
| 38 | } |
| 39 | |
| 40 | if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1) |
| 41 | { |
| 42 | std::cerr << "setupUnixSocket: bind() call failed" << std::endl; |
| 43 | close(sock); |
| 44 | return -1; |
| 45 | } |
| 46 | |
| 47 | if (listen(sock, 1) == -1) |
| 48 | { |
| 49 | std::cerr << "setupUnixSocket: listen() call failed" << std::endl; |
| 50 | close(sock); |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | fd_set rfd; |
| 55 | struct timeval tv; |
| 56 | tv.tv_sec = 1; |
| 57 | tv.tv_usec = 0; |
| 58 | |
| 59 | FD_ZERO(&rfd); |
| 60 | FD_SET(sock, &rfd); |
| 61 | int nfd = sock + 1; |
| Andrew Geissler | efbb594 | 2020-12-15 10:12:30 -0600 | [diff] [blame] | 62 | int fd = -1; |
| Ravi Teja | ce1c96f | 2020-10-05 23:13:01 -0500 | [diff] [blame] | 63 | |
| 64 | int retval = select(nfd, &rfd, NULL, NULL, &tv); |
| 65 | if (retval < 0) |
| 66 | { |
| 67 | std::cerr << "setupUnixSocket: select call failed " << errno |
| 68 | << std::endl; |
| 69 | close(sock); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | if ((retval > 0) && (FD_ISSET(sock, &rfd))) |
| 74 | { |
| 75 | fd = accept(sock, NULL, NULL); |
| 76 | if (fd < 0) |
| 77 | { |
| 78 | std::cerr << "setupUnixSocket: accept() call failed " << errno |
| 79 | << std::endl; |
| 80 | close(sock); |
| 81 | return -1; |
| 82 | } |
| 83 | close(sock); |
| 84 | } |
| 85 | return fd; |
| 86 | } |
| 87 | |
| 88 | int writeToUnixSocket(const int sock, const char* buf, const uint64_t blockSize) |
| 89 | { |
| 90 | uint64_t i; |
| 91 | int nwrite = 0; |
| 92 | |
| 93 | for (i = 0; i < blockSize; i = i + nwrite) |
| 94 | { |
| 95 | |
| 96 | fd_set wfd; |
| 97 | struct timeval tv; |
| 98 | tv.tv_sec = 1; |
| 99 | tv.tv_usec = 0; |
| 100 | |
| 101 | FD_ZERO(&wfd); |
| 102 | FD_SET(sock, &wfd); |
| 103 | int nfd = sock + 1; |
| 104 | |
| 105 | int retval = select(nfd, NULL, &wfd, NULL, &tv); |
| 106 | if (retval < 0) |
| 107 | { |
| 108 | std::cerr << "writeToUnixSocket: select call failed " << errno |
| 109 | << std::endl; |
| 110 | close(sock); |
| 111 | return -1; |
| 112 | } |
| 113 | if (retval == 0) |
| 114 | { |
| 115 | nwrite = 0; |
| 116 | continue; |
| 117 | } |
| 118 | if ((retval > 0) && (FD_ISSET(sock, &wfd))) |
| 119 | { |
| 120 | nwrite = write(sock, buf + i, blockSize - i); |
| 121 | if (nwrite < 0) |
| 122 | { |
| 123 | if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) |
| 124 | { |
| 125 | std::cerr << "writeToUnixSocket: Write call failed with " |
| 126 | "EAGAIN or EWOULDBLOCK or EINTR" |
| 127 | << std::endl; |
| 128 | nwrite = 0; |
| 129 | continue; |
| 130 | } |
| 131 | std::cerr << "writeToUnixSocket: Failed to write" << std::endl; |
| 132 | close(sock); |
| 133 | return -1; |
| 134 | } |
| 135 | } |
| 136 | else |
| 137 | { |
| 138 | nwrite = 0; |
| 139 | } |
| 140 | } |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | } // namespace utils |
| 145 | } // namespace responder |
| 146 | } // namespace pldm |