diff options
author | Jaywalker <jwilliams@nsllc.com> | 2018-02-06 17:48:39 -0600 |
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committer | Sam Bingner <sam@bingner.com> | 2020-07-17 00:22:23 -1000 |
commit | 12b140dcbd782b47fe0758f40d5c69f6008afe23 (patch) | |
tree | cb856e9edba2040467fe10961b8a1e24e5416f28 /apt-pkg/getservbyport_r.cc | |
parent | 6f660d119bab8e260796f9a020574a3c0a255f20 (diff) |
Added seemingly missing files
Diffstat (limited to 'apt-pkg/getservbyport_r.cc')
-rw-r--r-- | apt-pkg/getservbyport_r.cc | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/apt-pkg/getservbyport_r.cc b/apt-pkg/getservbyport_r.cc new file mode 100644 index 000000000..cf78ad514 --- /dev/null +++ b/apt-pkg/getservbyport_r.cc @@ -0,0 +1,59 @@ +#define _GNU_SOURCE +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netdb.h> +#include <inttypes.h> +#include <errno.h> +#include <string.h> + +#ifndef HAVE_GETSERVBYPORT_R + +extern "C" int getservbyport_r(int port, const char *prots, + struct servent *se, char *buf, size_t buflen, struct servent **res) +{ + int i; + struct sockaddr_in sin = { + .sin_family = AF_INET, + .sin_port = (in_port_t) port, + }; + + if (!prots) { + int r = getservbyport_r(port, "tcp", se, buf, buflen, res); + if (r) r = getservbyport_r(port, "udp", se, buf, buflen, res); + return r; + } + + /* Align buffer */ + i = (uintptr_t)buf & sizeof(char *)-1; + if (!i) i = sizeof(char *); + if (buflen < 3*sizeof(char *)-i) + return ERANGE; + buf += sizeof(char *)-i; + buflen -= sizeof(char *)-i; + + if (strcmp(prots, "tcp") && strcmp(prots, "udp")) return EINVAL; + + se->s_port = port; + se->s_proto = (char *)prots; + se->s_aliases = (char **)buf; + buf += 2*sizeof(char *); + buflen -= 2*sizeof(char *); + se->s_aliases[1] = 0; + se->s_aliases[0] = se->s_name = buf; + + switch (getnameinfo((const struct sockaddr *) &sin, sizeof sin, 0, 0, buf, buflen, + strcmp(prots, "udp") ? 0 : NI_DGRAM)) { + case EAI_MEMORY: + case EAI_SYSTEM: + return ENOMEM; + default: + return ENOENT; + case 0: + break; + } + + *res = se; + return 0; +} +#endif |