freshlybakedca.ke
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1#define USE_THE_REPOSITORY_VARIABLE
2
3#include "git-compat-util.h"
4#include "config.h"
5#include "environment.h"
6#include "protocol.h"
7#include "trace2.h"
8
9static enum protocol_version parse_protocol_version(const char *value)
10{
11 if (!strcmp(value, "0"))
12 return protocol_v0;
13 else if (!strcmp(value, "1"))
14 return protocol_v1;
15 else if (!strcmp(value, "2"))
16 return protocol_v2;
17 else
18 return protocol_unknown_version;
19}
20
21enum protocol_version get_protocol_version_config(void)
22{
23 const char *value;
24 const char *git_test_k = "GIT_TEST_PROTOCOL_VERSION";
25 const char *git_test_v;
26
27 if (!repo_config_get_string_tmp(the_repository, "protocol.version", &value)) {
28 enum protocol_version version = parse_protocol_version(value);
29
30 if (version == protocol_unknown_version)
31 die("unknown value for config 'protocol.version': %s",
32 value);
33
34 return version;
35 }
36
37 git_test_v = getenv(git_test_k);
38 if (git_test_v && *git_test_v) {
39 enum protocol_version env = parse_protocol_version(git_test_v);
40
41 if (env == protocol_unknown_version)
42 die("unknown value for %s: %s", git_test_k, git_test_v);
43 return env;
44 }
45
46 return protocol_v2;
47}
48
49enum protocol_version determine_protocol_version_server(void)
50{
51 const char *git_protocol = getenv(GIT_PROTOCOL_ENVIRONMENT);
52 enum protocol_version version = protocol_v0;
53
54 /*
55 * Determine which protocol version the client has requested. Since
56 * multiple 'version' keys can be sent by the client, indicating that
57 * the client is okay to speak any of them, select the greatest version
58 * that the client has requested. This is due to the assumption that
59 * the most recent protocol version will be the most state-of-the-art.
60 */
61 if (git_protocol) {
62 struct string_list list = STRING_LIST_INIT_DUP;
63 const struct string_list_item *item;
64 string_list_split(&list, git_protocol, ":", -1);
65
66 for_each_string_list_item(item, &list) {
67 const char *value;
68 enum protocol_version v;
69
70 if (skip_prefix(item->string, "version=", &value)) {
71 v = parse_protocol_version(value);
72 if (v > version)
73 version = v;
74 }
75 }
76
77 string_list_clear(&list, 0);
78 }
79
80 trace2_data_intmax("transfer", NULL, "negotiated-version", version);
81
82 return version;
83}
84
85enum protocol_version determine_protocol_version_client(const char *server_response)
86{
87 enum protocol_version version = protocol_v0;
88
89 if (skip_prefix(server_response, "version ", &server_response)) {
90 version = parse_protocol_version(server_response);
91
92 if (version == protocol_unknown_version)
93 die("server is speaking an unknown protocol");
94 if (version == protocol_v0)
95 die("protocol error: server explicitly said version 0");
96 }
97
98 return version;
99}