7c9fbda6e2
* maint-2.18: (33 commits) Git 2.18.2 Git 2.17.3 Git 2.16.6 test-drop-caches: use `has_dos_drive_prefix()` Git 2.15.4 Git 2.14.6 mingw: handle `subst`-ed "DOS drives" mingw: refuse to access paths with trailing spaces or periods mingw: refuse to access paths with illegal characters unpack-trees: let merged_entry() pass through do_add_entry()'s errors quote-stress-test: offer to test quoting arguments for MSYS2 sh t6130/t9350: prepare for stringent Win32 path validation quote-stress-test: allow skipping some trials quote-stress-test: accept arguments to test via the command-line tests: add a helper to stress test argument quoting mingw: fix quoting of arguments Disallow dubiously-nested submodule git directories protect_ntfs: turn on NTFS protection by default path: also guard `.gitmodules` against NTFS Alternate Data Streams is_ntfs_dotgit(): speed it up ...
1328 lines
32 KiB
C
1328 lines
32 KiB
C
#include "git-compat-util.h"
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#include "cache.h"
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#include "config.h"
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#include "pkt-line.h"
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#include "quote.h"
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#include "refs.h"
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#include "run-command.h"
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#include "remote.h"
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#include "connect.h"
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#include "url.h"
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#include "string-list.h"
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#include "sha1-array.h"
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#include "transport.h"
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#include "strbuf.h"
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#include "version.h"
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#include "protocol.h"
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#include "alias.h"
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static char *server_capabilities_v1;
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static struct argv_array server_capabilities_v2 = ARGV_ARRAY_INIT;
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static const char *parse_feature_value(const char *, const char *, int *);
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static int check_ref(const char *name, unsigned int flags)
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{
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if (!flags)
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return 1;
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if (!skip_prefix(name, "refs/", &name))
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return 0;
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/* REF_NORMAL means that we don't want the magic fake tag refs */
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if ((flags & REF_NORMAL) && check_refname_format(name, 0))
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return 0;
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/* REF_HEADS means that we want regular branch heads */
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if ((flags & REF_HEADS) && starts_with(name, "heads/"))
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return 1;
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/* REF_TAGS means that we want tags */
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if ((flags & REF_TAGS) && starts_with(name, "tags/"))
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return 1;
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/* All type bits clear means that we are ok with anything */
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return !(flags & ~REF_NORMAL);
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}
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int check_ref_type(const struct ref *ref, int flags)
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{
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return check_ref(ref->name, flags);
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}
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static NORETURN void die_initial_contact(int unexpected)
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{
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/*
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* A hang-up after seeing some response from the other end
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* means that it is unexpected, as we know the other end is
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* willing to talk to us. A hang-up before seeing any
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* response does not necessarily mean an ACL problem, though.
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*/
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if (unexpected)
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die(_("the remote end hung up upon initial contact"));
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else
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die(_("Could not read from remote repository.\n\n"
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"Please make sure you have the correct access rights\n"
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"and the repository exists."));
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}
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/* Checks if the server supports the capability 'c' */
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int server_supports_v2(const char *c, int die_on_error)
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{
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int i;
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for (i = 0; i < server_capabilities_v2.argc; i++) {
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const char *out;
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if (skip_prefix(server_capabilities_v2.argv[i], c, &out) &&
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(!*out || *out == '='))
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return 1;
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}
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if (die_on_error)
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die(_("server doesn't support '%s'"), c);
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return 0;
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}
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int server_supports_feature(const char *c, const char *feature,
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int die_on_error)
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{
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int i;
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for (i = 0; i < server_capabilities_v2.argc; i++) {
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const char *out;
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if (skip_prefix(server_capabilities_v2.argv[i], c, &out) &&
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(!*out || *(out++) == '=')) {
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if (parse_feature_request(out, feature))
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return 1;
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else
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break;
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}
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}
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if (die_on_error)
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die(_("server doesn't support feature '%s'"), feature);
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return 0;
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}
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static void process_capabilities_v2(struct packet_reader *reader)
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{
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while (packet_reader_read(reader) == PACKET_READ_NORMAL)
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argv_array_push(&server_capabilities_v2, reader->line);
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if (reader->status != PACKET_READ_FLUSH)
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die(_("expected flush after capabilities"));
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}
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enum protocol_version discover_version(struct packet_reader *reader)
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{
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enum protocol_version version = protocol_unknown_version;
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/*
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* Peek the first line of the server's response to
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* determine the protocol version the server is speaking.
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*/
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switch (packet_reader_peek(reader)) {
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case PACKET_READ_EOF:
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die_initial_contact(0);
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case PACKET_READ_FLUSH:
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case PACKET_READ_DELIM:
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version = protocol_v0;
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break;
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case PACKET_READ_NORMAL:
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version = determine_protocol_version_client(reader->line);
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break;
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}
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switch (version) {
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case protocol_v2:
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process_capabilities_v2(reader);
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break;
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case protocol_v1:
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/* Read the peeked version line */
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packet_reader_read(reader);
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break;
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case protocol_v0:
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break;
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case protocol_unknown_version:
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BUG("unknown protocol version");
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}
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return version;
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}
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static void parse_one_symref_info(struct string_list *symref, const char *val, int len)
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{
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char *sym, *target;
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struct string_list_item *item;
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if (!len)
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return; /* just "symref" */
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/* e.g. "symref=HEAD:refs/heads/master" */
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sym = xmemdupz(val, len);
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target = strchr(sym, ':');
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if (!target)
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/* just "symref=something" */
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goto reject;
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*(target++) = '\0';
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if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) ||
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check_refname_format(target, REFNAME_ALLOW_ONELEVEL))
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/* "symref=bogus:pair */
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goto reject;
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item = string_list_append_nodup(symref, sym);
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item->util = target;
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return;
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reject:
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free(sym);
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return;
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}
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static void annotate_refs_with_symref_info(struct ref *ref)
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{
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struct string_list symref = STRING_LIST_INIT_DUP;
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const char *feature_list = server_capabilities_v1;
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while (feature_list) {
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int len;
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const char *val;
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val = parse_feature_value(feature_list, "symref", &len);
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if (!val)
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break;
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parse_one_symref_info(&symref, val, len);
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feature_list = val + 1;
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}
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string_list_sort(&symref);
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for (; ref; ref = ref->next) {
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struct string_list_item *item;
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item = string_list_lookup(&symref, ref->name);
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if (!item)
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continue;
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ref->symref = xstrdup((char *)item->util);
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}
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string_list_clear(&symref, 0);
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}
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static void process_capabilities(const char *line, int *len)
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{
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int nul_location = strlen(line);
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if (nul_location == *len)
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return;
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server_capabilities_v1 = xstrdup(line + nul_location + 1);
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*len = nul_location;
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}
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static int process_dummy_ref(const char *line)
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{
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struct object_id oid;
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const char *name;
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if (parse_oid_hex(line, &oid, &name))
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return 0;
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if (*name != ' ')
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return 0;
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name++;
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return !oidcmp(&null_oid, &oid) && !strcmp(name, "capabilities^{}");
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}
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static void check_no_capabilities(const char *line, int len)
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{
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if (strlen(line) != len)
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warning(_("ignoring capabilities after first line '%s'"),
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line + strlen(line));
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}
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static int process_ref(const char *line, int len, struct ref ***list,
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unsigned int flags, struct oid_array *extra_have)
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{
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struct object_id old_oid;
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const char *name;
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if (parse_oid_hex(line, &old_oid, &name))
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return 0;
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if (*name != ' ')
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return 0;
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name++;
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if (extra_have && !strcmp(name, ".have")) {
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oid_array_append(extra_have, &old_oid);
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} else if (!strcmp(name, "capabilities^{}")) {
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die(_("protocol error: unexpected capabilities^{}"));
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} else if (check_ref(name, flags)) {
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struct ref *ref = alloc_ref(name);
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oidcpy(&ref->old_oid, &old_oid);
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**list = ref;
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*list = &ref->next;
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}
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check_no_capabilities(line, len);
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return 1;
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}
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static int process_shallow(const char *line, int len,
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struct oid_array *shallow_points)
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{
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const char *arg;
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struct object_id old_oid;
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if (!skip_prefix(line, "shallow ", &arg))
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return 0;
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if (get_oid_hex(arg, &old_oid))
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die(_("protocol error: expected shallow sha-1, got '%s'"), arg);
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if (!shallow_points)
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die(_("repository on the other end cannot be shallow"));
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oid_array_append(shallow_points, &old_oid);
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check_no_capabilities(line, len);
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return 1;
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}
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enum get_remote_heads_state {
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EXPECTING_FIRST_REF = 0,
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EXPECTING_REF,
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EXPECTING_SHALLOW,
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EXPECTING_DONE,
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};
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/*
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* Read all the refs from the other end
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*/
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struct ref **get_remote_heads(struct packet_reader *reader,
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struct ref **list, unsigned int flags,
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struct oid_array *extra_have,
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struct oid_array *shallow_points)
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{
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struct ref **orig_list = list;
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int len = 0;
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enum get_remote_heads_state state = EXPECTING_FIRST_REF;
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const char *arg;
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*list = NULL;
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while (state != EXPECTING_DONE) {
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switch (packet_reader_read(reader)) {
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case PACKET_READ_EOF:
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die_initial_contact(1);
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case PACKET_READ_NORMAL:
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len = reader->pktlen;
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if (len > 4 && skip_prefix(reader->line, "ERR ", &arg))
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die(_("remote error: %s"), arg);
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break;
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case PACKET_READ_FLUSH:
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state = EXPECTING_DONE;
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break;
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case PACKET_READ_DELIM:
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die(_("invalid packet"));
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}
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switch (state) {
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case EXPECTING_FIRST_REF:
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process_capabilities(reader->line, &len);
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if (process_dummy_ref(reader->line)) {
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state = EXPECTING_SHALLOW;
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break;
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}
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state = EXPECTING_REF;
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/* fallthrough */
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case EXPECTING_REF:
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if (process_ref(reader->line, len, &list, flags, extra_have))
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break;
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state = EXPECTING_SHALLOW;
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/* fallthrough */
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case EXPECTING_SHALLOW:
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if (process_shallow(reader->line, len, shallow_points))
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break;
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die(_("protocol error: unexpected '%s'"), reader->line);
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case EXPECTING_DONE:
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break;
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}
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}
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annotate_refs_with_symref_info(*orig_list);
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return list;
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}
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/* Returns 1 when a valid ref has been added to `list`, 0 otherwise */
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static int process_ref_v2(const char *line, struct ref ***list)
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{
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int ret = 1;
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int i = 0;
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struct object_id old_oid;
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struct ref *ref;
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struct string_list line_sections = STRING_LIST_INIT_DUP;
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const char *end;
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/*
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* Ref lines have a number of fields which are space deliminated. The
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* first field is the OID of the ref. The second field is the ref
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* name. Subsequent fields (symref-target and peeled) are optional and
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* don't have a particular order.
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*/
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if (string_list_split(&line_sections, line, ' ', -1) < 2) {
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ret = 0;
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goto out;
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}
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if (parse_oid_hex(line_sections.items[i++].string, &old_oid, &end) ||
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*end) {
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ret = 0;
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goto out;
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}
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ref = alloc_ref(line_sections.items[i++].string);
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oidcpy(&ref->old_oid, &old_oid);
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**list = ref;
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*list = &ref->next;
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for (; i < line_sections.nr; i++) {
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const char *arg = line_sections.items[i].string;
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if (skip_prefix(arg, "symref-target:", &arg))
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ref->symref = xstrdup(arg);
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if (skip_prefix(arg, "peeled:", &arg)) {
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struct object_id peeled_oid;
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char *peeled_name;
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struct ref *peeled;
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if (parse_oid_hex(arg, &peeled_oid, &end) || *end) {
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ret = 0;
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goto out;
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}
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peeled_name = xstrfmt("%s^{}", ref->name);
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peeled = alloc_ref(peeled_name);
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oidcpy(&peeled->old_oid, &peeled_oid);
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**list = peeled;
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*list = &peeled->next;
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free(peeled_name);
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}
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}
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out:
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string_list_clear(&line_sections, 0);
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return ret;
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}
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struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
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struct ref **list, int for_push,
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const struct argv_array *ref_prefixes,
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const struct string_list *server_options)
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{
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int i;
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*list = NULL;
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if (server_supports_v2("ls-refs", 1))
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packet_write_fmt(fd_out, "command=ls-refs\n");
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if (server_supports_v2("agent", 0))
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packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized());
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if (server_options && server_options->nr &&
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server_supports_v2("server-option", 1))
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for (i = 0; i < server_options->nr; i++)
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packet_write_fmt(fd_out, "server-option=%s",
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server_options->items[i].string);
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packet_delim(fd_out);
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/* When pushing we don't want to request the peeled tags */
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if (!for_push)
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packet_write_fmt(fd_out, "peel\n");
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packet_write_fmt(fd_out, "symrefs\n");
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for (i = 0; ref_prefixes && i < ref_prefixes->argc; i++) {
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packet_write_fmt(fd_out, "ref-prefix %s\n",
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ref_prefixes->argv[i]);
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}
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packet_flush(fd_out);
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|
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/* Process response from server */
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while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
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if (!process_ref_v2(reader->line, &list))
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die(_("invalid ls-refs response: %s"), reader->line);
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}
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|
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if (reader->status != PACKET_READ_FLUSH)
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die(_("expected flush after ref listing"));
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return list;
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}
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|
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static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp)
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{
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int len;
|
|
|
|
if (!feature_list)
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return NULL;
|
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|
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len = strlen(feature);
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|
while (*feature_list) {
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const char *found = strstr(feature_list, feature);
|
|
if (!found)
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return NULL;
|
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if (feature_list == found || isspace(found[-1])) {
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const char *value = found + len;
|
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/* feature with no value (e.g., "thin-pack") */
|
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if (!*value || isspace(*value)) {
|
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if (lenp)
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*lenp = 0;
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return value;
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}
|
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/* feature with a value (e.g., "agent=git/1.2.3") */
|
|
else if (*value == '=') {
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|
value++;
|
|
if (lenp)
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*lenp = strcspn(value, " \t\n");
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return value;
|
|
}
|
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/*
|
|
* otherwise we matched a substring of another feature;
|
|
* keep looking
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|
*/
|
|
}
|
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feature_list = found + 1;
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}
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return NULL;
|
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}
|
|
|
|
int parse_feature_request(const char *feature_list, const char *feature)
|
|
{
|
|
return !!parse_feature_value(feature_list, feature, NULL);
|
|
}
|
|
|
|
const char *server_feature_value(const char *feature, int *len)
|
|
{
|
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return parse_feature_value(server_capabilities_v1, feature, len);
|
|
}
|
|
|
|
int server_supports(const char *feature)
|
|
{
|
|
return !!server_feature_value(feature, NULL);
|
|
}
|
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|
|
enum protocol {
|
|
PROTO_LOCAL = 1,
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|
PROTO_FILE,
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|
PROTO_SSH,
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|
PROTO_GIT
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};
|
|
|
|
int url_is_local_not_ssh(const char *url)
|
|
{
|
|
const char *colon = strchr(url, ':');
|
|
const char *slash = strchr(url, '/');
|
|
return !colon || (slash && slash < colon) ||
|
|
(has_dos_drive_prefix(url) && is_valid_path(url));
|
|
}
|
|
|
|
static const char *prot_name(enum protocol protocol)
|
|
{
|
|
switch (protocol) {
|
|
case PROTO_LOCAL:
|
|
case PROTO_FILE:
|
|
return "file";
|
|
case PROTO_SSH:
|
|
return "ssh";
|
|
case PROTO_GIT:
|
|
return "git";
|
|
default:
|
|
return "unknown protocol";
|
|
}
|
|
}
|
|
|
|
static enum protocol get_protocol(const char *name)
|
|
{
|
|
if (!strcmp(name, "ssh"))
|
|
return PROTO_SSH;
|
|
if (!strcmp(name, "git"))
|
|
return PROTO_GIT;
|
|
if (!strcmp(name, "git+ssh")) /* deprecated - do not use */
|
|
return PROTO_SSH;
|
|
if (!strcmp(name, "ssh+git")) /* deprecated - do not use */
|
|
return PROTO_SSH;
|
|
if (!strcmp(name, "file"))
|
|
return PROTO_FILE;
|
|
die(_("protocol '%s' is not supported"), name);
|
|
}
|
|
|
|
static char *host_end(char **hoststart, int removebrackets)
|
|
{
|
|
char *host = *hoststart;
|
|
char *end;
|
|
char *start = strstr(host, "@[");
|
|
if (start)
|
|
start++; /* Jump over '@' */
|
|
else
|
|
start = host;
|
|
if (start[0] == '[') {
|
|
end = strchr(start + 1, ']');
|
|
if (end) {
|
|
if (removebrackets) {
|
|
*end = 0;
|
|
memmove(start, start + 1, end - start);
|
|
end++;
|
|
}
|
|
} else
|
|
end = host;
|
|
} else
|
|
end = host;
|
|
return end;
|
|
}
|
|
|
|
#define STR_(s) # s
|
|
#define STR(s) STR_(s)
|
|
|
|
static void get_host_and_port(char **host, const char **port)
|
|
{
|
|
char *colon, *end;
|
|
end = host_end(host, 1);
|
|
colon = strchr(end, ':');
|
|
if (colon) {
|
|
long portnr = strtol(colon + 1, &end, 10);
|
|
if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) {
|
|
*colon = 0;
|
|
*port = colon + 1;
|
|
} else if (!colon[1]) {
|
|
*colon = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void enable_keepalive(int sockfd)
|
|
{
|
|
int ka = 1;
|
|
|
|
if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
|
|
error_errno(_("unable to set SO_KEEPALIVE on socket"));
|
|
}
|
|
|
|
#ifndef NO_IPV6
|
|
|
|
static const char *ai_name(const struct addrinfo *ai)
|
|
{
|
|
static char addr[NI_MAXHOST];
|
|
if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
|
|
NI_NUMERICHOST) != 0)
|
|
xsnprintf(addr, sizeof(addr), "(unknown)");
|
|
|
|
return addr;
|
|
}
|
|
|
|
/*
|
|
* Returns a connected socket() fd, or else die()s.
|
|
*/
|
|
static int git_tcp_connect_sock(char *host, int flags)
|
|
{
|
|
struct strbuf error_message = STRBUF_INIT;
|
|
int sockfd = -1;
|
|
const char *port = STR(DEFAULT_GIT_PORT);
|
|
struct addrinfo hints, *ai0, *ai;
|
|
int gai;
|
|
int cnt = 0;
|
|
|
|
get_host_and_port(&host, &port);
|
|
if (!*port)
|
|
port = "<none>";
|
|
|
|
memset(&hints, 0, sizeof(hints));
|
|
if (flags & CONNECT_IPV4)
|
|
hints.ai_family = AF_INET;
|
|
else if (flags & CONNECT_IPV6)
|
|
hints.ai_family = AF_INET6;
|
|
hints.ai_socktype = SOCK_STREAM;
|
|
hints.ai_protocol = IPPROTO_TCP;
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
fprintf(stderr, _("Looking up %s ... "), host);
|
|
|
|
gai = getaddrinfo(host, port, &hints, &ai);
|
|
if (gai)
|
|
die(_("unable to look up %s (port %s) (%s)"), host, port, gai_strerror(gai));
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
/* TRANSLATORS: this is the end of "Looking up %s ... " */
|
|
fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port);
|
|
|
|
for (ai0 = ai; ai; ai = ai->ai_next, cnt++) {
|
|
sockfd = socket(ai->ai_family,
|
|
ai->ai_socktype, ai->ai_protocol);
|
|
if ((sockfd < 0) ||
|
|
(connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) {
|
|
strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
|
|
host, cnt, ai_name(ai), strerror(errno));
|
|
if (0 <= sockfd)
|
|
close(sockfd);
|
|
sockfd = -1;
|
|
continue;
|
|
}
|
|
if (flags & CONNECT_VERBOSE)
|
|
fprintf(stderr, "%s ", ai_name(ai));
|
|
break;
|
|
}
|
|
|
|
freeaddrinfo(ai0);
|
|
|
|
if (sockfd < 0)
|
|
die(_("unable to connect to %s:\n%s"), host, error_message.buf);
|
|
|
|
enable_keepalive(sockfd);
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
/* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
|
|
fprintf_ln(stderr, _("done."));
|
|
|
|
strbuf_release(&error_message);
|
|
|
|
return sockfd;
|
|
}
|
|
|
|
#else /* NO_IPV6 */
|
|
|
|
/*
|
|
* Returns a connected socket() fd, or else die()s.
|
|
*/
|
|
static int git_tcp_connect_sock(char *host, int flags)
|
|
{
|
|
struct strbuf error_message = STRBUF_INIT;
|
|
int sockfd = -1;
|
|
const char *port = STR(DEFAULT_GIT_PORT);
|
|
char *ep;
|
|
struct hostent *he;
|
|
struct sockaddr_in sa;
|
|
char **ap;
|
|
unsigned int nport;
|
|
int cnt;
|
|
|
|
get_host_and_port(&host, &port);
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
fprintf(stderr, _("Looking up %s ... "), host);
|
|
|
|
he = gethostbyname(host);
|
|
if (!he)
|
|
die(_("unable to look up %s (%s)"), host, hstrerror(h_errno));
|
|
nport = strtoul(port, &ep, 10);
|
|
if ( ep == port || *ep ) {
|
|
/* Not numeric */
|
|
struct servent *se = getservbyname(port,"tcp");
|
|
if ( !se )
|
|
die(_("unknown port %s"), port);
|
|
nport = se->s_port;
|
|
}
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
/* TRANSLATORS: this is the end of "Looking up %s ... " */
|
|
fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port);
|
|
|
|
for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
|
|
memset(&sa, 0, sizeof sa);
|
|
sa.sin_family = he->h_addrtype;
|
|
sa.sin_port = htons(nport);
|
|
memcpy(&sa.sin_addr, *ap, he->h_length);
|
|
|
|
sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
|
|
if ((sockfd < 0) ||
|
|
connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
|
|
strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
|
|
host,
|
|
cnt,
|
|
inet_ntoa(*(struct in_addr *)&sa.sin_addr),
|
|
strerror(errno));
|
|
if (0 <= sockfd)
|
|
close(sockfd);
|
|
sockfd = -1;
|
|
continue;
|
|
}
|
|
if (flags & CONNECT_VERBOSE)
|
|
fprintf(stderr, "%s ",
|
|
inet_ntoa(*(struct in_addr *)&sa.sin_addr));
|
|
break;
|
|
}
|
|
|
|
if (sockfd < 0)
|
|
die(_("unable to connect to %s:\n%s"), host, error_message.buf);
|
|
|
|
enable_keepalive(sockfd);
|
|
|
|
if (flags & CONNECT_VERBOSE)
|
|
/* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
|
|
fprintf_ln(stderr, _("done."));
|
|
|
|
return sockfd;
|
|
}
|
|
|
|
#endif /* NO_IPV6 */
|
|
|
|
|
|
/*
|
|
* Dummy child_process returned by git_connect() if the transport protocol
|
|
* does not need fork(2).
|
|
*/
|
|
static struct child_process no_fork = CHILD_PROCESS_INIT;
|
|
|
|
int git_connection_is_socket(struct child_process *conn)
|
|
{
|
|
return conn == &no_fork;
|
|
}
|
|
|
|
static struct child_process *git_tcp_connect(int fd[2], char *host, int flags)
|
|
{
|
|
int sockfd = git_tcp_connect_sock(host, flags);
|
|
|
|
fd[0] = sockfd;
|
|
fd[1] = dup(sockfd);
|
|
|
|
return &no_fork;
|
|
}
|
|
|
|
|
|
static char *git_proxy_command;
|
|
|
|
static int git_proxy_command_options(const char *var, const char *value,
|
|
void *cb)
|
|
{
|
|
if (!strcmp(var, "core.gitproxy")) {
|
|
const char *for_pos;
|
|
int matchlen = -1;
|
|
int hostlen;
|
|
const char *rhost_name = cb;
|
|
int rhost_len = strlen(rhost_name);
|
|
|
|
if (git_proxy_command)
|
|
return 0;
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
/* [core]
|
|
* ;# matches www.kernel.org as well
|
|
* gitproxy = netcatter-1 for kernel.org
|
|
* gitproxy = netcatter-2 for sample.xz
|
|
* gitproxy = netcatter-default
|
|
*/
|
|
for_pos = strstr(value, " for ");
|
|
if (!for_pos)
|
|
/* matches everybody */
|
|
matchlen = strlen(value);
|
|
else {
|
|
hostlen = strlen(for_pos + 5);
|
|
if (rhost_len < hostlen)
|
|
matchlen = -1;
|
|
else if (!strncmp(for_pos + 5,
|
|
rhost_name + rhost_len - hostlen,
|
|
hostlen) &&
|
|
((rhost_len == hostlen) ||
|
|
rhost_name[rhost_len - hostlen -1] == '.'))
|
|
matchlen = for_pos - value;
|
|
else
|
|
matchlen = -1;
|
|
}
|
|
if (0 <= matchlen) {
|
|
/* core.gitproxy = none for kernel.org */
|
|
if (matchlen == 4 &&
|
|
!memcmp(value, "none", 4))
|
|
matchlen = 0;
|
|
git_proxy_command = xmemdupz(value, matchlen);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return git_default_config(var, value, cb);
|
|
}
|
|
|
|
static int git_use_proxy(const char *host)
|
|
{
|
|
git_proxy_command = getenv("GIT_PROXY_COMMAND");
|
|
git_config(git_proxy_command_options, (void*)host);
|
|
return (git_proxy_command && *git_proxy_command);
|
|
}
|
|
|
|
static struct child_process *git_proxy_connect(int fd[2], char *host)
|
|
{
|
|
const char *port = STR(DEFAULT_GIT_PORT);
|
|
struct child_process *proxy;
|
|
|
|
get_host_and_port(&host, &port);
|
|
|
|
if (looks_like_command_line_option(host))
|
|
die(_("strange hostname '%s' blocked"), host);
|
|
if (looks_like_command_line_option(port))
|
|
die(_("strange port '%s' blocked"), port);
|
|
|
|
proxy = xmalloc(sizeof(*proxy));
|
|
child_process_init(proxy);
|
|
argv_array_push(&proxy->args, git_proxy_command);
|
|
argv_array_push(&proxy->args, host);
|
|
argv_array_push(&proxy->args, port);
|
|
proxy->in = -1;
|
|
proxy->out = -1;
|
|
if (start_command(proxy))
|
|
die(_("cannot start proxy %s"), git_proxy_command);
|
|
fd[0] = proxy->out; /* read from proxy stdout */
|
|
fd[1] = proxy->in; /* write to proxy stdin */
|
|
return proxy;
|
|
}
|
|
|
|
static char *get_port(char *host)
|
|
{
|
|
char *end;
|
|
char *p = strchr(host, ':');
|
|
|
|
if (p) {
|
|
long port = strtol(p + 1, &end, 10);
|
|
if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
|
|
*p = '\0';
|
|
return p+1;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Extract protocol and relevant parts from the specified connection URL.
|
|
* The caller must free() the returned strings.
|
|
*/
|
|
static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
|
|
char **ret_path)
|
|
{
|
|
char *url;
|
|
char *host, *path;
|
|
char *end;
|
|
int separator = '/';
|
|
enum protocol protocol = PROTO_LOCAL;
|
|
|
|
if (is_url(url_orig))
|
|
url = url_decode(url_orig);
|
|
else
|
|
url = xstrdup(url_orig);
|
|
|
|
host = strstr(url, "://");
|
|
if (host) {
|
|
*host = '\0';
|
|
protocol = get_protocol(url);
|
|
host += 3;
|
|
} else {
|
|
host = url;
|
|
if (!url_is_local_not_ssh(url)) {
|
|
protocol = PROTO_SSH;
|
|
separator = ':';
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Don't do destructive transforms as protocol code does
|
|
* '[]' unwrapping in get_host_and_port()
|
|
*/
|
|
end = host_end(&host, 0);
|
|
|
|
if (protocol == PROTO_LOCAL)
|
|
path = end;
|
|
else if (protocol == PROTO_FILE && has_dos_drive_prefix(end))
|
|
path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */
|
|
else
|
|
path = strchr(end, separator);
|
|
|
|
if (!path || !*path)
|
|
die(_("no path specified; see 'git help pull' for valid url syntax"));
|
|
|
|
/*
|
|
* null-terminate hostname and point path to ~ for URL's like this:
|
|
* ssh://host.xz/~user/repo
|
|
*/
|
|
|
|
end = path; /* Need to \0 terminate host here */
|
|
if (separator == ':')
|
|
path++; /* path starts after ':' */
|
|
if (protocol == PROTO_GIT || protocol == PROTO_SSH) {
|
|
if (path[1] == '~')
|
|
path++;
|
|
}
|
|
|
|
path = xstrdup(path);
|
|
*end = '\0';
|
|
|
|
*ret_host = xstrdup(host);
|
|
*ret_path = path;
|
|
free(url);
|
|
return protocol;
|
|
}
|
|
|
|
static const char *get_ssh_command(void)
|
|
{
|
|
const char *ssh;
|
|
|
|
if ((ssh = getenv("GIT_SSH_COMMAND")))
|
|
return ssh;
|
|
|
|
if (!git_config_get_string_const("core.sshcommand", &ssh))
|
|
return ssh;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
enum ssh_variant {
|
|
VARIANT_AUTO,
|
|
VARIANT_SIMPLE,
|
|
VARIANT_SSH,
|
|
VARIANT_PLINK,
|
|
VARIANT_PUTTY,
|
|
VARIANT_TORTOISEPLINK,
|
|
};
|
|
|
|
static void override_ssh_variant(enum ssh_variant *ssh_variant)
|
|
{
|
|
const char *variant = getenv("GIT_SSH_VARIANT");
|
|
|
|
if (!variant && git_config_get_string_const("ssh.variant", &variant))
|
|
return;
|
|
|
|
if (!strcmp(variant, "auto"))
|
|
*ssh_variant = VARIANT_AUTO;
|
|
else if (!strcmp(variant, "plink"))
|
|
*ssh_variant = VARIANT_PLINK;
|
|
else if (!strcmp(variant, "putty"))
|
|
*ssh_variant = VARIANT_PUTTY;
|
|
else if (!strcmp(variant, "tortoiseplink"))
|
|
*ssh_variant = VARIANT_TORTOISEPLINK;
|
|
else if (!strcmp(variant, "simple"))
|
|
*ssh_variant = VARIANT_SIMPLE;
|
|
else
|
|
*ssh_variant = VARIANT_SSH;
|
|
}
|
|
|
|
static enum ssh_variant determine_ssh_variant(const char *ssh_command,
|
|
int is_cmdline)
|
|
{
|
|
enum ssh_variant ssh_variant = VARIANT_AUTO;
|
|
const char *variant;
|
|
char *p = NULL;
|
|
|
|
override_ssh_variant(&ssh_variant);
|
|
|
|
if (ssh_variant != VARIANT_AUTO)
|
|
return ssh_variant;
|
|
|
|
if (!is_cmdline) {
|
|
p = xstrdup(ssh_command);
|
|
variant = basename(p);
|
|
} else {
|
|
const char **ssh_argv;
|
|
|
|
p = xstrdup(ssh_command);
|
|
if (split_cmdline(p, &ssh_argv) > 0) {
|
|
variant = basename((char *)ssh_argv[0]);
|
|
/*
|
|
* At this point, variant points into the buffer
|
|
* referenced by p, hence we do not need ssh_argv
|
|
* any longer.
|
|
*/
|
|
free(ssh_argv);
|
|
} else {
|
|
free(p);
|
|
return ssh_variant;
|
|
}
|
|
}
|
|
|
|
if (!strcasecmp(variant, "ssh") ||
|
|
!strcasecmp(variant, "ssh.exe"))
|
|
ssh_variant = VARIANT_SSH;
|
|
else if (!strcasecmp(variant, "plink") ||
|
|
!strcasecmp(variant, "plink.exe"))
|
|
ssh_variant = VARIANT_PLINK;
|
|
else if (!strcasecmp(variant, "tortoiseplink") ||
|
|
!strcasecmp(variant, "tortoiseplink.exe"))
|
|
ssh_variant = VARIANT_TORTOISEPLINK;
|
|
|
|
free(p);
|
|
return ssh_variant;
|
|
}
|
|
|
|
/*
|
|
* Open a connection using Git's native protocol.
|
|
*
|
|
* The caller is responsible for freeing hostandport, but this function may
|
|
* modify it (for example, to truncate it to remove the port part).
|
|
*/
|
|
static struct child_process *git_connect_git(int fd[2], char *hostandport,
|
|
const char *path, const char *prog,
|
|
enum protocol_version version,
|
|
int flags)
|
|
{
|
|
struct child_process *conn;
|
|
struct strbuf request = STRBUF_INIT;
|
|
/*
|
|
* Set up virtual host information based on where we will
|
|
* connect, unless the user has overridden us in
|
|
* the environment.
|
|
*/
|
|
char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST");
|
|
if (target_host)
|
|
target_host = xstrdup(target_host);
|
|
else
|
|
target_host = xstrdup(hostandport);
|
|
|
|
transport_check_allowed("git");
|
|
|
|
/*
|
|
* These underlying connection commands die() if they
|
|
* cannot connect.
|
|
*/
|
|
if (git_use_proxy(hostandport))
|
|
conn = git_proxy_connect(fd, hostandport);
|
|
else
|
|
conn = git_tcp_connect(fd, hostandport, flags);
|
|
/*
|
|
* Separate original protocol components prog and path
|
|
* from extended host header with a NUL byte.
|
|
*
|
|
* Note: Do not add any other headers here! Doing so
|
|
* will cause older git-daemon servers to crash.
|
|
*/
|
|
strbuf_addf(&request,
|
|
"%s %s%chost=%s%c",
|
|
prog, path, 0,
|
|
target_host, 0);
|
|
|
|
/* If using a new version put that stuff here after a second null byte */
|
|
if (version > 0) {
|
|
strbuf_addch(&request, '\0');
|
|
strbuf_addf(&request, "version=%d%c",
|
|
version, '\0');
|
|
}
|
|
|
|
packet_write(fd[1], request.buf, request.len);
|
|
|
|
free(target_host);
|
|
strbuf_release(&request);
|
|
return conn;
|
|
}
|
|
|
|
/*
|
|
* Append the appropriate environment variables to `env` and options to
|
|
* `args` for running ssh in Git's SSH-tunneled transport.
|
|
*/
|
|
static void push_ssh_options(struct argv_array *args, struct argv_array *env,
|
|
enum ssh_variant variant, const char *port,
|
|
enum protocol_version version, int flags)
|
|
{
|
|
if (variant == VARIANT_SSH &&
|
|
version > 0) {
|
|
argv_array_push(args, "-o");
|
|
argv_array_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT);
|
|
argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
|
|
version);
|
|
}
|
|
|
|
if (flags & CONNECT_IPV4) {
|
|
switch (variant) {
|
|
case VARIANT_AUTO:
|
|
BUG("VARIANT_AUTO passed to push_ssh_options");
|
|
case VARIANT_SIMPLE:
|
|
die(_("ssh variant 'simple' does not support -4"));
|
|
case VARIANT_SSH:
|
|
case VARIANT_PLINK:
|
|
case VARIANT_PUTTY:
|
|
case VARIANT_TORTOISEPLINK:
|
|
argv_array_push(args, "-4");
|
|
}
|
|
} else if (flags & CONNECT_IPV6) {
|
|
switch (variant) {
|
|
case VARIANT_AUTO:
|
|
BUG("VARIANT_AUTO passed to push_ssh_options");
|
|
case VARIANT_SIMPLE:
|
|
die(_("ssh variant 'simple' does not support -6"));
|
|
case VARIANT_SSH:
|
|
case VARIANT_PLINK:
|
|
case VARIANT_PUTTY:
|
|
case VARIANT_TORTOISEPLINK:
|
|
argv_array_push(args, "-6");
|
|
}
|
|
}
|
|
|
|
if (variant == VARIANT_TORTOISEPLINK)
|
|
argv_array_push(args, "-batch");
|
|
|
|
if (port) {
|
|
switch (variant) {
|
|
case VARIANT_AUTO:
|
|
BUG("VARIANT_AUTO passed to push_ssh_options");
|
|
case VARIANT_SIMPLE:
|
|
die(_("ssh variant 'simple' does not support setting port"));
|
|
case VARIANT_SSH:
|
|
argv_array_push(args, "-p");
|
|
break;
|
|
case VARIANT_PLINK:
|
|
case VARIANT_PUTTY:
|
|
case VARIANT_TORTOISEPLINK:
|
|
argv_array_push(args, "-P");
|
|
}
|
|
|
|
argv_array_push(args, port);
|
|
}
|
|
}
|
|
|
|
/* Prepare a child_process for use by Git's SSH-tunneled transport. */
|
|
static void fill_ssh_args(struct child_process *conn, const char *ssh_host,
|
|
const char *port, enum protocol_version version,
|
|
int flags)
|
|
{
|
|
const char *ssh;
|
|
enum ssh_variant variant;
|
|
|
|
if (looks_like_command_line_option(ssh_host))
|
|
die(_("strange hostname '%s' blocked"), ssh_host);
|
|
|
|
ssh = get_ssh_command();
|
|
if (ssh) {
|
|
variant = determine_ssh_variant(ssh, 1);
|
|
} else {
|
|
/*
|
|
* GIT_SSH is the no-shell version of
|
|
* GIT_SSH_COMMAND (and must remain so for
|
|
* historical compatibility).
|
|
*/
|
|
conn->use_shell = 0;
|
|
|
|
ssh = getenv("GIT_SSH");
|
|
if (!ssh)
|
|
ssh = "ssh";
|
|
variant = determine_ssh_variant(ssh, 0);
|
|
}
|
|
|
|
if (variant == VARIANT_AUTO) {
|
|
struct child_process detect = CHILD_PROCESS_INIT;
|
|
|
|
detect.use_shell = conn->use_shell;
|
|
detect.no_stdin = detect.no_stdout = detect.no_stderr = 1;
|
|
|
|
argv_array_push(&detect.args, ssh);
|
|
argv_array_push(&detect.args, "-G");
|
|
push_ssh_options(&detect.args, &detect.env_array,
|
|
VARIANT_SSH, port, version, flags);
|
|
argv_array_push(&detect.args, ssh_host);
|
|
|
|
variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH;
|
|
}
|
|
|
|
argv_array_push(&conn->args, ssh);
|
|
push_ssh_options(&conn->args, &conn->env_array, variant, port, version, flags);
|
|
argv_array_push(&conn->args, ssh_host);
|
|
}
|
|
|
|
/*
|
|
* This returns the dummy child_process `no_fork` if the transport protocol
|
|
* does not need fork(2), or a struct child_process object if it does. Once
|
|
* done, finish the connection with finish_connect() with the value returned
|
|
* from this function (it is safe to call finish_connect() with NULL to
|
|
* support the former case).
|
|
*
|
|
* If it returns, the connect is successful; it just dies on errors (this
|
|
* will hopefully be changed in a libification effort, to return NULL when
|
|
* the connection failed).
|
|
*/
|
|
struct child_process *git_connect(int fd[2], const char *url,
|
|
const char *prog, int flags)
|
|
{
|
|
char *hostandport, *path;
|
|
struct child_process *conn;
|
|
enum protocol protocol;
|
|
enum protocol_version version = get_protocol_version_config();
|
|
|
|
/*
|
|
* NEEDSWORK: If we are trying to use protocol v2 and we are planning
|
|
* to perform a push, then fallback to v0 since the client doesn't know
|
|
* how to push yet using v2.
|
|
*/
|
|
if (version == protocol_v2 && !strcmp("git-receive-pack", prog))
|
|
version = protocol_v0;
|
|
|
|
/* Without this we cannot rely on waitpid() to tell
|
|
* what happened to our children.
|
|
*/
|
|
signal(SIGCHLD, SIG_DFL);
|
|
|
|
protocol = parse_connect_url(url, &hostandport, &path);
|
|
if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) {
|
|
printf("Diag: url=%s\n", url ? url : "NULL");
|
|
printf("Diag: protocol=%s\n", prot_name(protocol));
|
|
printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
|
|
printf("Diag: path=%s\n", path ? path : "NULL");
|
|
conn = NULL;
|
|
} else if (protocol == PROTO_GIT) {
|
|
conn = git_connect_git(fd, hostandport, path, prog, version, flags);
|
|
} else {
|
|
struct strbuf cmd = STRBUF_INIT;
|
|
const char *const *var;
|
|
|
|
conn = xmalloc(sizeof(*conn));
|
|
child_process_init(conn);
|
|
|
|
if (looks_like_command_line_option(path))
|
|
die(_("strange pathname '%s' blocked"), path);
|
|
|
|
strbuf_addstr(&cmd, prog);
|
|
strbuf_addch(&cmd, ' ');
|
|
sq_quote_buf(&cmd, path);
|
|
|
|
/* remove repo-local variables from the environment */
|
|
for (var = local_repo_env; *var; var++)
|
|
argv_array_push(&conn->env_array, *var);
|
|
|
|
conn->use_shell = 1;
|
|
conn->in = conn->out = -1;
|
|
if (protocol == PROTO_SSH) {
|
|
char *ssh_host = hostandport;
|
|
const char *port = NULL;
|
|
transport_check_allowed("ssh");
|
|
get_host_and_port(&ssh_host, &port);
|
|
|
|
if (!port)
|
|
port = get_port(ssh_host);
|
|
|
|
if (flags & CONNECT_DIAG_URL) {
|
|
printf("Diag: url=%s\n", url ? url : "NULL");
|
|
printf("Diag: protocol=%s\n", prot_name(protocol));
|
|
printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL");
|
|
printf("Diag: port=%s\n", port ? port : "NONE");
|
|
printf("Diag: path=%s\n", path ? path : "NULL");
|
|
|
|
free(hostandport);
|
|
free(path);
|
|
free(conn);
|
|
strbuf_release(&cmd);
|
|
return NULL;
|
|
}
|
|
fill_ssh_args(conn, ssh_host, port, version, flags);
|
|
} else {
|
|
transport_check_allowed("file");
|
|
if (version > 0) {
|
|
argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
|
|
version);
|
|
}
|
|
}
|
|
argv_array_push(&conn->args, cmd.buf);
|
|
|
|
if (start_command(conn))
|
|
die(_("unable to fork"));
|
|
|
|
fd[0] = conn->out; /* read from child's stdout */
|
|
fd[1] = conn->in; /* write to child's stdin */
|
|
strbuf_release(&cmd);
|
|
}
|
|
free(hostandport);
|
|
free(path);
|
|
return conn;
|
|
}
|
|
|
|
int finish_connect(struct child_process *conn)
|
|
{
|
|
int code;
|
|
if (!conn || git_connection_is_socket(conn))
|
|
return 0;
|
|
|
|
code = finish_command(conn);
|
|
free(conn);
|
|
return code;
|
|
}
|