diff options
Diffstat (limited to 'lib/mlibc/options/posix/generic/services.cpp')
| -rw-r--r-- | lib/mlibc/options/posix/generic/services.cpp | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/lib/mlibc/options/posix/generic/services.cpp b/lib/mlibc/options/posix/generic/services.cpp deleted file mode 100644 index 8ae0656..0000000 --- a/lib/mlibc/options/posix/generic/services.cpp +++ /dev/null @@ -1,222 +0,0 @@ -#include <mlibc/services.hpp> -#include <netdb.h> -#include <stdio.h> -#include <errno.h> -#include <string.h> -#include <stdlib.h> -#include <ctype.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <mlibc/debug.hpp> - -namespace mlibc { - -static int parse_rest(service_buf &buf, char *end, int proto) { - if (!strncmp(end, "/udp", 4)) { - if (proto == IPPROTO_TCP && proto != -1) - return 0; - buf.protocol = IPPROTO_UDP; - buf.socktype = SOCK_DGRAM; - } else if (!strncmp(end, "/tcp", 4)) { - if (proto == IPPROTO_UDP && proto != -1) - return 0; - buf.protocol = IPPROTO_TCP; - buf.socktype = SOCK_STREAM; - } else { - return 0; - } - - //TODO(geert): also parse aliases. - - return 1; -} - -static int lookup_serv_file_port(service_result &buf, int proto, int port) { - auto file = fopen(_PATH_SERVICES, "r"); - if (!file) { - switch (errno) { - case ENOENT: - case ENOTDIR: - case EACCES: - return -EAI_SERVICE; - default: - return -EAI_SYSTEM; - } - } - - char line_buf[129] = {0}; - char *line = line_buf + 1; - while(fgets(line, 128, file)) { - int name_length = 0; - char *pos; - // easy way to handle comments, just move the end of the line - // to the beginning of the comment - if ((pos = strchr(line, '#'))) { - *pos++ = '\n'; - *pos = '\0'; - } - - char *end = NULL; - for (pos = line; *pos; pos++) { - for (; isalpha(*pos); pos++); - int rport = strtoul(pos, &end, 10); - if (rport != port || rport > 65535) { - pos = end; - continue; - } - - // We have found the port, time to rewind to the start - // of the line. - for (; pos[-1]; pos--) - if(!isspace(pos[-1])) - name_length++; - break; - } - - if (!pos) - continue; - - if (!name_length) - continue; - - auto name = frg::string<MemoryAllocator>(pos, name_length, - getAllocator()); - - struct service_buf sbuf = {}; - sbuf.port = port; - sbuf.name = std::move(name); - if (!parse_rest(sbuf, end, proto)) - continue; - buf.push_back(std::move(sbuf)); - } - - fclose(file); - return buf.size(); -} - -static int lookup_serv_file_name(service_result &buf, const char *name, - int proto) { - auto file = fopen(_PATH_SERVICES, "r"); - if (!file) { - switch (errno) { - case ENOENT: - case ENOTDIR: - case EACCES: - return -EAI_SERVICE; - default: - return -EAI_SYSTEM; - } - } - - char line[128]; - int name_length = strlen(name); - while(fgets(line, 128, file)) { - char *pos; - // easy way to handle comments, just move the end of the line - // to the beginning of the comment - if ((pos = strchr(line, '#'))) { - *pos++ = '\n'; - *pos = '\0'; - } - - for (pos = line; (pos = strstr(pos, name)); pos++) { - // the name must start and end with a space - if (pos > line && !isspace(pos[-1])) - continue; - if (pos[name_length] && !isspace(pos[name_length])) - continue; - break; - } - if (!pos) - continue; - - // Skip the name at the beginning of the line. - for(pos = line; *pos && !isspace(*pos); pos++) - ; - - char *end = NULL; - int port = strtoul(pos, &end, 10); - if (port > 65535 || end == pos) - continue; - - struct service_buf sbuf; - sbuf.port = port; - sbuf.name = frg::string<MemoryAllocator>(name, getAllocator()); - if (!parse_rest(sbuf, end, proto)) - continue; - - buf.push_back(sbuf); - - } - - fclose(file); - return buf.size(); -} - - -// This function returns a negative error code, since a positive -// return code means success. -int lookup_serv_by_name(service_result &buf, const char *name, int proto, - int socktype, int flags) { - switch(socktype) { - case SOCK_STREAM: - if (!proto) - proto = IPPROTO_TCP; - else if (proto != IPPROTO_TCP) - return -EAI_SERVICE; - break; - case SOCK_DGRAM: - if (!proto) - proto = IPPROTO_UDP; - else if (proto != IPPROTO_UDP) - return -EAI_SERVICE; - break; - case 0: - break; - default: - if (name) - return -EAI_SERVICE; - buf[0].port = 0; - buf[0].socktype = socktype; - buf[0].protocol = proto; - return 1; - } - - char *end = nullptr; - unsigned int port = 0; - int count = 0; - - if (name) { - if (!*name) - return -EAI_SERVICE; - port = strtoul(name, &end, 10); - } - // The end pointer is a null pointer so the name was a port - // or the name was not specified. - if (!end || !*end) { - if (proto != IPPROTO_UDP) { - buf[count].port = port; - buf[count].protocol = IPPROTO_TCP; - buf[count].socktype = SOCK_STREAM; - count++; - } - if (proto != IPPROTO_TCP) { - buf[count].port = port; - buf[count].protocol = IPPROTO_UDP; - buf[count].socktype = SOCK_DGRAM; - count++; - } - return count; - } - - if (flags & AI_NUMERICSERV) - return -EAI_NONAME; - - return lookup_serv_file_name(buf, name, proto); -} - -int lookup_serv_by_port(service_result &buf, int proto, int port) { - return lookup_serv_file_port(buf, proto, port); -} - -} // namespace mlibc |